./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem17_label50.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_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/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_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/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_4c72e0d9-6495-471c-8269-e570faa1d761/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 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:13:59,573 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:13:59,582 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:13:59,651 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:13:59,652 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:13:59,658 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:13:59,660 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:13:59,665 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:13:59,668 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:13:59,675 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:13:59,677 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:13:59,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:13:59,680 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:13:59,683 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:13:59,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:13:59,691 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:13:59,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:13:59,695 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:13:59,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:13:59,708 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:13:59,710 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:13:59,712 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:13:59,716 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:13:59,717 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:13:59,728 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:13:59,729 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:13:59,730 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:13:59,732 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:13:59,733 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:13:59,734 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:13:59,735 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:13:59,736 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:13:59,739 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:13:59,740 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:13:59,742 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:13:59,743 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:13:59,744 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:13:59,744 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:13:59,745 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:13:59,746 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:13:59,747 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:13:59,748 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:13:59,804 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:13:59,805 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:13:59,806 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:13:59,806 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:13:59,815 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:13:59,816 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:13:59,816 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:13:59,816 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:13:59,817 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:13:59,817 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:13:59,818 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:13:59,819 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:13:59,823 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:13:59,824 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:13:59,824 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:13:59,824 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:13:59,825 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:13:59,825 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:13:59,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:13:59,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:13:59,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:13:59,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:13:59,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:13:59,828 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:13:59,828 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:13:59,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:13:59,830 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:13:59,831 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:13:59,831 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:13:59,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:13:59,832 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:13:59,832 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:13:59,833 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:13:59,833 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:13:59,833 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:13:59,834 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:13:59,834 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:13:59,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:13:59,835 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:13:59,835 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:13:59,835 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:13:59,836 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_4c72e0d9-6495-471c-8269-e570faa1d761/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 [2021-11-23 17:14:00,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:14:00,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:14:00,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:14:00,264 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:14:00,265 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:14:00,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2021-11-23 17:14:00,381 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/29ae60c8e/41ac83c7fdc9462a91724f359ace2826/FLAG52a17578d [2021-11-23 17:14:01,233 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:14:01,234 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2021-11-23 17:14:01,258 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/29ae60c8e/41ac83c7fdc9462a91724f359ace2826/FLAG52a17578d [2021-11-23 17:14:01,379 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/29ae60c8e/41ac83c7fdc9462a91724f359ace2826 [2021-11-23 17:14:01,381 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:14:01,384 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:14:01,388 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:01,388 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:14:01,392 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:14:01,393 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:01" (1/1) ... [2021-11-23 17:14:01,394 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@538afdf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:01, skipping insertion in model container [2021-11-23 17:14:01,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:01" (1/1) ... [2021-11-23 17:14:01,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:14:01,544 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:14:01,801 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_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2021-11-23 17:14:02,803 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:02,816 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:14:02,855 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_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2021-11-23 17:14:03,245 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:03,270 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:14:03,271 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03 WrapperNode [2021-11-23 17:14:03,271 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:03,272 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:03,273 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:14:03,273 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:14:03,283 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:03,401 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:03,805 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2611 [2021-11-23 17:14:03,805 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:03,807 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:14:03,807 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:14:03,807 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:14:03,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:03,819 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:03,899 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:03,899 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:04,246 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:04,293 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:04,359 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:04,471 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:14:04,473 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:14:04,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:14:04,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:14:04,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:03" (1/1) ... [2021-11-23 17:14:04,485 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:04,500 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:04,521 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:14:04,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:14:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:14:04,589 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:14:04,590 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:14:04,590 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:14:04,689 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:14:04,691 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:14:09,508 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:14:09,573 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 17:14:09,584 INFO L158 Benchmark]: Toolchain (without parser) took 8198.40ms. Allocated memory was 100.7MB in the beginning and 459.3MB in the end (delta: 358.6MB). Free memory was 58.8MB in the beginning and 336.0MB in the end (delta: -277.2MB). Peak memory consumption was 183.5MB. Max. memory is 16.1GB. [2021-11-23 17:14:09,586 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 100.7MB. Free memory was 54.6MB in the beginning and 54.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:14:09,587 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1883.48ms. Allocated memory was 100.7MB in the beginning and 134.2MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 56.8MB in the end (delta: 1.8MB). Peak memory consumption was 56.9MB. Max. memory is 16.1GB. [2021-11-23 17:14:09,589 INFO L158 Benchmark]: Boogie Procedure Inliner took 533.65ms. Allocated memory is still 134.2MB. Free memory was 56.8MB in the beginning and 53.2MB in the end (delta: 3.6MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2021-11-23 17:14:09,590 INFO L158 Benchmark]: Boogie Preprocessor took 664.61ms. Allocated memory was 134.2MB in the beginning and 241.2MB in the end (delta: 107.0MB). Free memory was 53.2MB in the beginning and 147.1MB in the end (delta: -94.0MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2021-11-23 17:14:09,591 INFO L158 Benchmark]: RCFGBuilder took 5107.87ms. Allocated memory was 241.2MB in the beginning and 459.3MB in the end (delta: 218.1MB). Free memory was 147.1MB in the beginning and 336.0MB in the end (delta: -188.9MB). Peak memory consumption was 134.1MB. Max. memory is 16.1GB. [2021-11-23 17:14:09,601 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 100.7MB. Free memory was 54.6MB in the beginning and 54.6MB in the end (delta: 77.0kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1883.48ms. Allocated memory was 100.7MB in the beginning and 134.2MB in the end (delta: 33.6MB). Free memory was 58.6MB in the beginning and 56.8MB in the end (delta: 1.8MB). Peak memory consumption was 56.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 533.65ms. Allocated memory is still 134.2MB. Free memory was 56.8MB in the beginning and 53.2MB in the end (delta: 3.6MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 664.61ms. Allocated memory was 134.2MB in the beginning and 241.2MB in the end (delta: 107.0MB). Free memory was 53.2MB in the beginning and 147.1MB in the end (delta: -94.0MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. * RCFGBuilder took 5107.87ms. Allocated memory was 241.2MB in the beginning and 459.3MB in the end (delta: 218.1MB). Free memory was 147.1MB in the beginning and 336.0MB in the end (delta: -188.9MB). Peak memory consumption was 134.1MB. 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 17:14:09,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/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_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/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_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem17_label50.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/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_4c72e0d9-6495-471c-8269-e570faa1d761/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 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:14:12,546 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:14:12,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:14:12,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:14:12,603 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:14:12,608 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:14:12,610 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:14:12,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:14:12,618 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:14:12,625 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:14:12,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:14:12,629 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:14:12,630 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:14:12,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:14:12,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:14:12,639 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:14:12,641 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:14:12,642 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:14:12,644 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:14:12,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:14:12,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:14:12,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:14:12,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:14:12,660 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:14:12,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:14:12,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:14:12,670 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:14:12,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:14:12,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:14:12,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:14:12,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:14:12,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:14:12,678 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:14:12,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:14:12,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:14:12,681 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:14:12,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:14:12,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:14:12,682 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:14:12,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:14:12,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:14:12,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:14:12,731 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:14:12,732 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:14:12,733 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:14:12,733 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:14:12,734 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:14:12,734 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:14:12,734 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:14:12,735 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:14:12,735 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:14:12,735 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:14:12,736 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:14:12,736 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:14:12,738 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:14:12,738 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:14:12,739 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:14:12,739 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:14:12,739 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:14:12,739 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:14:12,739 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:14:12,740 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:14:12,740 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:14:12,740 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:14:12,740 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:14:12,741 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:14:12,741 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:14:12,741 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:14:12,741 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:14:12,742 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:14:12,742 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:14:12,742 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:12,742 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:14:12,742 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:14:12,743 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:14:12,743 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:14:12,744 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:14:12,744 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:14:12,744 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:14:12,745 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:14:12,745 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_4c72e0d9-6495-471c-8269-e570faa1d761/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 451c7dc1e9ccbf0e1b2bfff20c93c74c6a2c224dafb02ba3904b999265578105 [2021-11-23 17:14:13,224 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:14:13,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:14:13,264 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:14:13,266 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:14:13,267 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:14:13,269 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2021-11-23 17:14:13,355 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/3bb5180f7/c18ed04e91aa422ea2e4ac20bbd90176/FLAG1d2dadea3 [2021-11-23 17:14:14,414 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:14:14,414 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c [2021-11-23 17:14:14,450 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/3bb5180f7/c18ed04e91aa422ea2e4ac20bbd90176/FLAG1d2dadea3 [2021-11-23 17:14:14,892 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/data/3bb5180f7/c18ed04e91aa422ea2e4ac20bbd90176 [2021-11-23 17:14:14,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:14:14,897 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:14:14,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:14,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:14:14,905 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:14:14,906 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:14" (1/1) ... [2021-11-23 17:14:14,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@75bd0407 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:14, skipping insertion in model container [2021-11-23 17:14:14,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:14:14" (1/1) ... [2021-11-23 17:14:14,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:14:15,024 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:14:15,203 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_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2021-11-23 17:14:16,489 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:16,505 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:14:16,536 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_4c72e0d9-6495-471c-8269-e570faa1d761/sv-benchmarks/c/eca-rers2012/Problem17_label50.c[1517,1530] [2021-11-23 17:14:17,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:14:17,095 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:14:17,096 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17 WrapperNode [2021-11-23 17:14:17,096 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:14:17,097 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:17,098 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:14:17,098 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:14:17,107 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,209 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,430 INFO L137 Inliner]: procedures = 15, calls = 9, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 2608 [2021-11-23 17:14:17,430 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:14:17,432 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:14:17,432 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:14:17,433 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:14:17,444 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,444 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,469 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,469 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,586 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,657 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,734 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,795 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:14:17,796 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:14:17,796 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:14:17,797 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:14:17,798 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (1/1) ... [2021-11-23 17:14:17,823 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:14:17,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:14:17,865 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:14:17,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:14:17,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:14:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:14:17,969 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:14:17,969 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:14:18,073 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:14:18,075 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:14:53,341 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:14:53,365 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:14:53,365 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:14:53,369 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:14:53 BoogieIcfgContainer [2021-11-23 17:14:53,370 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:14:53,372 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:14:53,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:14:53,376 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:14:53,377 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:14:14" (1/3) ... [2021-11-23 17:14:53,378 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fff1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:14:53, skipping insertion in model container [2021-11-23 17:14:53,378 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:14:17" (2/3) ... [2021-11-23 17:14:53,379 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32fff1eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:14:53, skipping insertion in model container [2021-11-23 17:14:53,379 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:14:53" (3/3) ... [2021-11-23 17:14:53,381 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label50.c [2021-11-23 17:14:53,388 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:14:53,388 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:14:53,458 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:14:53,468 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 17:14:53,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:14:53,513 INFO L276 IsEmpty]: Start isEmpty. Operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 17:14:53,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-23 17:14:53,523 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:14:53,524 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:14:53,525 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:14:53,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:14:53,537 INFO L85 PathProgramCache]: Analyzing trace with hash 647015545, now seen corresponding path program 1 times [2021-11-23 17:14:53,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:14:53,554 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [433639701] [2021-11-23 17:14:53,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:14:53,556 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:14:53,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:14:53,563 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:14:53,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:14:53,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:14:53,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:14:53,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:14:53,766 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 17:14:53,766 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:14:53,767 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:14:53,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [433639701] [2021-11-23 17:14:53,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [433639701] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:14:53,769 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:14:53,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:14:53,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441566563] [2021-11-23 17:14:53,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:14:53,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:14:53,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:14:53,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:14:53,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:14:53,819 INFO L87 Difference]: Start difference. First operand has 590 states, 588 states have (on average 1.8061224489795917) internal successors, (1062), 589 states have internal predecessors, (1062), 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 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:31,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:15:31,922 INFO L93 Difference]: Finished difference Result 1644 states and 3032 transitions. [2021-11-23 17:15:31,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:15:31,924 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-23 17:15:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:15:31,947 INFO L225 Difference]: With dead ends: 1644 [2021-11-23 17:15:31,948 INFO L226 Difference]: Without dead ends: 975 [2021-11-23 17:15:31,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:31,959 INFO L933 BasicCegarLoop]: 350 mSDtfsCounter, 468 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 1583 mSolverCounterSat, 230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 31.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 1813 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 230 IncrementalHoareTripleChecker+Valid, 1583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 37.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:15:31,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [468 Valid, 415 Invalid, 1813 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [230 Valid, 1583 Invalid, 0 Unknown, 0 Unchecked, 37.9s Time] [2021-11-23 17:15:31,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2021-11-23 17:15:32,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 960. [2021-11-23 17:15:32,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 959 states have (on average 1.616266944734098) internal successors, (1550), 959 states have internal predecessors, (1550), 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 17:15:32,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 1550 transitions. [2021-11-23 17:15:32,068 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 1550 transitions. Word has length 9 [2021-11-23 17:15:32,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:15:32,068 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 1550 transitions. [2021-11-23 17:15:32,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 2 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:15:32,069 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 1550 transitions. [2021-11-23 17:15:32,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-23 17:15:32,072 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:15:32,072 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:15:32,086 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:15:32,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:15:32,284 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:15:32,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:15:32,285 INFO L85 PathProgramCache]: Analyzing trace with hash -2030614627, now seen corresponding path program 1 times [2021-11-23 17:15:32,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:15:32,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1997591730] [2021-11-23 17:15:32,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:15:32,290 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:15:32,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:15:32,291 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:15:32,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:15:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:15:32,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:15:32,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:15:32,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:15:32,682 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:15:32,682 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:15:32,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1997591730] [2021-11-23 17:15:32,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1997591730] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:15:32,682 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:15:32,683 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:15:32,683 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883344782] [2021-11-23 17:15:32,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:15:32,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:15:32,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:15:32,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:15:32,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:15:32,686 INFO L87 Difference]: Start difference. First operand 960 states and 1550 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 17:16:04,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:16:04,831 INFO L93 Difference]: Finished difference Result 2351 states and 3891 transitions. [2021-11-23 17:16:04,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:16:04,832 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 74 [2021-11-23 17:16:04,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:16:04,841 INFO L225 Difference]: With dead ends: 2351 [2021-11-23 17:16:04,842 INFO L226 Difference]: Without dead ends: 1393 [2021-11-23 17:16:04,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 72 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 17:16:04,845 INFO L933 BasicCegarLoop]: 515 mSDtfsCounter, 394 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1081 mSolverCounterSat, 548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 25.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 394 SdHoareTripleChecker+Valid, 590 SdHoareTripleChecker+Invalid, 1629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 548 IncrementalHoareTripleChecker+Valid, 1081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 32.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:16:04,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [394 Valid, 590 Invalid, 1629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [548 Valid, 1081 Invalid, 0 Unknown, 0 Unchecked, 32.0s Time] [2021-11-23 17:16:04,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1393 states. [2021-11-23 17:16:04,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1393 to 1393. [2021-11-23 17:16:04,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1393 states, 1392 states have (on average 1.3038793103448276) internal successors, (1815), 1392 states have internal predecessors, (1815), 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 17:16:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1393 states to 1393 states and 1815 transitions. [2021-11-23 17:16:04,894 INFO L78 Accepts]: Start accepts. Automaton has 1393 states and 1815 transitions. Word has length 74 [2021-11-23 17:16:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:16:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 1393 states and 1815 transitions. [2021-11-23 17:16:04,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 17:16:04,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1393 states and 1815 transitions. [2021-11-23 17:16:04,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 17:16:04,898 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:16:04,899 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:16:04,912 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 17:16:05,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,111 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:16:05,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:16:05,111 INFO L85 PathProgramCache]: Analyzing trace with hash -1839202100, now seen corresponding path program 1 times [2021-11-23 17:16:05,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:16:05,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [528595388] [2021-11-23 17:16:05,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:05,113 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:16:05,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:16:05,115 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:16:05,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:16:05,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:05,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:05,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:05,597 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:05,597 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:10,672 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:16:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [528595388] [2021-11-23 17:16:10,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [528595388] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:10,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [549401221] [2021-11-23 17:16:10,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:10,674 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:10,674 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:16:10,677 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:16:10,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-11-23 17:16:11,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:11,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:16:11,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:11,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:11,404 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:14,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [549401221] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:16:14,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174280855] [2021-11-23 17:16:14,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:16:14,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:16:14,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:14,226 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:16:14,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 17:16:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:16:14,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:16:14,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:16:14,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:14,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:16:19,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:16:19,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174280855] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:16:19,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:16:19,279 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 10 [2021-11-23 17:16:19,279 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735545694] [2021-11-23 17:16:19,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:16:19,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:16:19,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:16:19,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:16:19,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:16:19,280 INFO L87 Difference]: Start difference. First operand 1393 states and 1815 transitions. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 17:17:04,893 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 17:17:16,465 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:19:55,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:55,222 INFO L93 Difference]: Finished difference Result 4102 states and 5690 transitions. [2021-11-23 17:19:55,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:19:55,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 79 [2021-11-23 17:19:55,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:55,241 INFO L225 Difference]: With dead ends: 4102 [2021-11-23 17:19:55,241 INFO L226 Difference]: Without dead ends: 2696 [2021-11-23 17:19:55,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 459 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:19:55,245 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 1033 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 2663 mSolverCounterSat, 1210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 199.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1033 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1210 IncrementalHoareTripleChecker+Valid, 2663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 215.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:55,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1033 Valid, 162 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1210 Valid, 2663 Invalid, 0 Unknown, 0 Unchecked, 215.7s Time] [2021-11-23 17:19:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2696 states. [2021-11-23 17:19:55,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2696 to 2688. [2021-11-23 17:19:55,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2688 states, 2687 states have (on average 1.259769259397097) internal successors, (3385), 2687 states have internal predecessors, (3385), 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 17:19:55,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2688 states to 2688 states and 3385 transitions. [2021-11-23 17:19:55,325 INFO L78 Accepts]: Start accepts. Automaton has 2688 states and 3385 transitions. Word has length 79 [2021-11-23 17:19:55,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:55,325 INFO L470 AbstractCegarLoop]: Abstraction has 2688 states and 3385 transitions. [2021-11-23 17:19:55,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 3 states have internal predecessors, (79), 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 17:19:55,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2688 states and 3385 transitions. [2021-11-23 17:19:55,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-23 17:19:55,328 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:55,328 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:19:55,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:55,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:55,762 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:55,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:19:55,940 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:55,940 INFO L85 PathProgramCache]: Analyzing trace with hash -411355158, now seen corresponding path program 1 times [2021-11-23 17:19:55,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:55,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1117877108] [2021-11-23 17:19:55,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:55,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:55,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:55,949 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:55,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:19:56,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:19:56,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:19:56,190 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:19:56,190 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:19:56,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1117877108] [2021-11-23 17:19:56,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1117877108] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:19:56,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:19:56,191 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:19:56,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341720449] [2021-11-23 17:19:56,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:19:56,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:19:56,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:19:56,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:19:56,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:19:56,193 INFO L87 Difference]: Start difference. First operand 2688 states and 3385 transitions. Second operand has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 17:20:18,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:18,285 INFO L93 Difference]: Finished difference Result 6229 states and 8262 transitions. [2021-11-23 17:20:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:18,292 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 92 [2021-11-23 17:20:18,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:18,314 INFO L225 Difference]: With dead ends: 6229 [2021-11-23 17:20:18,314 INFO L226 Difference]: Without dead ends: 3968 [2021-11-23 17:20:18,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 90 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 17:20:18,319 INFO L933 BasicCegarLoop]: 688 mSDtfsCounter, 558 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 1084 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 558 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 1367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 1084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 22.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:18,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [558 Valid, 742 Invalid, 1367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 1084 Invalid, 0 Unknown, 0 Unchecked, 22.0s Time] [2021-11-23 17:20:18,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3968 states. [2021-11-23 17:20:18,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3968 to 3968. [2021-11-23 17:20:18,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 1.2578774892866145) internal successors, (4990), 3967 states have internal predecessors, (4990), 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 17:20:18,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 4990 transitions. [2021-11-23 17:20:18,413 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 4990 transitions. Word has length 92 [2021-11-23 17:20:18,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:18,414 INFO L470 AbstractCegarLoop]: Abstraction has 3968 states and 4990 transitions. [2021-11-23 17:20:18,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.666666666666668) internal successors, (92), 3 states have internal predecessors, (92), 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 17:20:18,415 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 4990 transitions. [2021-11-23 17:20:18,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-23 17:20:18,418 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:18,419 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:18,431 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:18,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:18,631 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:18,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:18,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2127190533, now seen corresponding path program 1 times [2021-11-23 17:20:18,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:18,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [298102669] [2021-11-23 17:20:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:18,634 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:18,634 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:18,636 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:18,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:20:18,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:18,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:20:18,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:19,505 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:20:19,505 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:22,972 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:20:22,972 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [298102669] [2021-11-23 17:20:22,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [298102669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:22,972 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [943366941] [2021-11-23 17:20:22,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:22,973 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:22,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:22,975 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:22,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:20:23,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:23,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:20:23,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:24,292 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:20:24,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:27,572 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:20:27,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [943366941] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:27,573 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624888029] [2021-11-23 17:20:27,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:27,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:27,574 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:27,579 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:20:27,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 17:20:27,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:27,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:20:27,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:28,298 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 13 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:28,298 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 83 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:20:33,745 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624888029] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:20:33,745 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:20:33,746 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 6 [2021-11-23 17:20:33,746 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458867332] [2021-11-23 17:20:33,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:33,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:20:33,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:33,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:20:33,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:20:33,751 INFO L87 Difference]: Start difference. First operand 3968 states and 4990 transitions. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 17:20:51,078 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:20:59,102 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:07,931 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.20s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:22:18,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:18,468 INFO L93 Difference]: Finished difference Result 13067 states and 16581 transitions. [2021-11-23 17:22:18,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:22:18,477 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 163 [2021-11-23 17:22:18,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:18,522 INFO L225 Difference]: With dead ends: 13067 [2021-11-23 17:22:18,522 INFO L226 Difference]: Without dead ends: 8676 [2021-11-23 17:22:18,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 972 GetRequests, 967 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:22:18,530 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 844 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 2267 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 94.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 844 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 2737 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 2267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 104.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:18,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [844 Valid, 226 Invalid, 2737 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 2267 Invalid, 0 Unknown, 0 Unchecked, 104.6s Time] [2021-11-23 17:22:18,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8676 states. [2021-11-23 17:22:18,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8676 to 6116. [2021-11-23 17:22:18,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6116 states, 6115 states have (on average 1.2466067048242029) internal successors, (7623), 6115 states have internal predecessors, (7623), 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 17:22:18,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6116 states to 6116 states and 7623 transitions. [2021-11-23 17:22:18,694 INFO L78 Accepts]: Start accepts. Automaton has 6116 states and 7623 transitions. Word has length 163 [2021-11-23 17:22:18,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:18,695 INFO L470 AbstractCegarLoop]: Abstraction has 6116 states and 7623 transitions. [2021-11-23 17:22:18,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 3 states have internal predecessors, (163), 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 17:22:18,696 INFO L276 IsEmpty]: Start isEmpty. Operand 6116 states and 7623 transitions. [2021-11-23 17:22:18,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2021-11-23 17:22:18,704 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:18,704 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:18,723 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:18,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:19,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:19,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:19,305 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:19,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:19,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1479816766, now seen corresponding path program 1 times [2021-11-23 17:22:19,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:19,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1235403913] [2021-11-23 17:22:19,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:19,308 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:19,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:19,309 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:19,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:22:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:19,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:19,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:20,201 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:20,202 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:23,410 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:23,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1235403913] [2021-11-23 17:22:23,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1235403913] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:23,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [359977981] [2021-11-23 17:22:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:23,412 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:23,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:23,414 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:23,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:22:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:24,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:22:24,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:24,821 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:24,821 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:27,915 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:27,915 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [359977981] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:27,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304566617] [2021-11-23 17:22:27,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:27,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:22:27,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:22:27,917 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:22:27,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 17:22:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:28,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:22:28,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 154 proven. 73 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:28,839 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:34,069 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 227 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:22:34,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304566617] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:22:34,070 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:22:34,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3, 3, 3, 3] total 6 [2021-11-23 17:22:34,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354497169] [2021-11-23 17:22:34,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:34,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:22:34,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:34,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:22:34,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:22:34,072 INFO L87 Difference]: Start difference. First operand 6116 states and 7623 transitions. Second operand has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 17:23:18,084 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:56,633 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:20,668 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 17:24:42,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:42,965 INFO L93 Difference]: Finished difference Result 14369 states and 18033 transitions. [2021-11-23 17:24:42,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:24:42,969 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 237 [2021-11-23 17:24:42,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:43,005 INFO L225 Difference]: With dead ends: 14369 [2021-11-23 17:24:43,005 INFO L226 Difference]: Without dead ends: 8680 [2021-11-23 17:24:43,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1416 GetRequests, 1411 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:24:43,012 INFO L933 BasicCegarLoop]: 114 mSDtfsCounter, 860 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 2224 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 117.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 860 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 2224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 128.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:43,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [860 Valid, 200 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 2224 Invalid, 0 Unknown, 0 Unchecked, 128.7s Time] [2021-11-23 17:24:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-11-23 17:24:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 7826. [2021-11-23 17:24:43,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7826 states, 7825 states have (on average 1.2201916932907348) internal successors, (9548), 7825 states have internal predecessors, (9548), 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 17:24:43,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7826 states to 7826 states and 9548 transitions. [2021-11-23 17:24:43,199 INFO L78 Accepts]: Start accepts. Automaton has 7826 states and 9548 transitions. Word has length 237 [2021-11-23 17:24:43,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:43,200 INFO L470 AbstractCegarLoop]: Abstraction has 7826 states and 9548 transitions. [2021-11-23 17:24:43,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 57.75) internal successors, (231), 3 states have internal predecessors, (231), 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 17:24:43,200 INFO L276 IsEmpty]: Start isEmpty. Operand 7826 states and 9548 transitions. [2021-11-23 17:24:43,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2021-11-23 17:24:43,205 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:43,205 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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, 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 17:24:43,225 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:43,428 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:43,650 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:43,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:43,820 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:43,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:43,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1123194644, now seen corresponding path program 1 times [2021-11-23 17:24:43,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:43,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1632719623] [2021-11-23 17:24:43,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:43,822 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:43,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:43,824 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:43,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:24:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:44,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:24:44,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:45,127 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 154 proven. 82 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:24:45,127 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 236 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:24:45,950 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:45,951 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1632719623] [2021-11-23 17:24:45,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1632719623] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:24:45,951 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:24:45,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:24:45,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571317423] [2021-11-23 17:24:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:24:45,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:24:45,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:45,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:24:45,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:24:45,952 INFO L87 Difference]: Start difference. First operand 7826 states and 9548 transitions. Second operand has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 17:24:54,888 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:32,566 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.63s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:25:59,573 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:04,876 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:14,390 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:16,426 INFO L93 Difference]: Finished difference Result 21607 states and 26480 transitions. [2021-11-23 17:26:16,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:16,436 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 261 [2021-11-23 17:26:16,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:16,471 INFO L225 Difference]: With dead ends: 21607 [2021-11-23 17:26:16,472 INFO L226 Difference]: Without dead ends: 14207 [2021-11-23 17:26:16,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 517 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 17:26:16,478 INFO L933 BasicCegarLoop]: 584 mSDtfsCounter, 445 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1171 mSolverCounterSat, 332 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 85.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 1503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 332 IncrementalHoareTripleChecker+Valid, 1171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 90.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:16,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [445 Valid, 618 Invalid, 1503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [332 Valid, 1171 Invalid, 0 Unknown, 0 Unchecked, 90.4s Time] [2021-11-23 17:26:16,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14207 states. [2021-11-23 17:26:16,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14207 to 12499. [2021-11-23 17:26:16,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12499 states, 12498 states have (on average 1.2234757561209793) internal successors, (15291), 12498 states have internal predecessors, (15291), 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 17:26:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12499 states to 12499 states and 15291 transitions. [2021-11-23 17:26:16,784 INFO L78 Accepts]: Start accepts. Automaton has 12499 states and 15291 transitions. Word has length 261 [2021-11-23 17:26:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:16,785 INFO L470 AbstractCegarLoop]: Abstraction has 12499 states and 15291 transitions. [2021-11-23 17:26:16,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 17:26:16,786 INFO L276 IsEmpty]: Start isEmpty. Operand 12499 states and 15291 transitions. [2021-11-23 17:26:16,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 341 [2021-11-23 17:26:16,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:16,793 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-23 17:26:16,815 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:17,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,013 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:17,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1319531786, now seen corresponding path program 1 times [2021-11-23 17:26:17,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:17,017 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1250158498] [2021-11-23 17:26:17,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:17,017 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:17,017 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:17,018 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:17,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:26:17,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:17,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:26:17,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:18,222 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 301 proven. 82 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:26:18,222 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:19,165 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 383 proven. 0 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:26:19,165 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:19,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1250158498] [2021-11-23 17:26:19,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1250158498] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:26:19,166 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:26:19,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:26:19,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065670597] [2021-11-23 17:26:19,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:19,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:19,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:19,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:19,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:26:19,168 INFO L87 Difference]: Start difference. First operand 12499 states and 15291 transitions. Second operand has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 17:26:26,839 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:29,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:34,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:26:42,205 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:10,738 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.52s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:27:12,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:12,537 INFO L93 Difference]: Finished difference Result 29250 states and 35783 transitions. [2021-11-23 17:27:12,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:12,538 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 340 [2021-11-23 17:27:12,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:12,570 INFO L225 Difference]: With dead ends: 29250 [2021-11-23 17:27:12,570 INFO L226 Difference]: Without dead ends: 17178 [2021-11-23 17:27:12,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 678 GetRequests, 675 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 17:27:12,583 INFO L933 BasicCegarLoop]: 679 mSDtfsCounter, 395 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1189 mSolverCounterSat, 209 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 395 SdHoareTripleChecker+Valid, 730 SdHoareTripleChecker+Invalid, 1399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 1189 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:12,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [395 Valid, 730 Invalid, 1399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 1189 Invalid, 1 Unknown, 0 Unchecked, 53.2s Time] [2021-11-23 17:27:12,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17178 states. [2021-11-23 17:27:12,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17178 to 16750. [2021-11-23 17:27:12,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16750 states, 16749 states have (on average 1.2013851573228251) internal successors, (20122), 16749 states have internal predecessors, (20122), 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 17:27:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16750 states to 16750 states and 20122 transitions. [2021-11-23 17:27:12,965 INFO L78 Accepts]: Start accepts. Automaton has 16750 states and 20122 transitions. Word has length 340 [2021-11-23 17:27:12,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:12,968 INFO L470 AbstractCegarLoop]: Abstraction has 16750 states and 20122 transitions. [2021-11-23 17:27:12,968 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 88.0) internal successors, (264), 3 states have internal predecessors, (264), 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 17:27:12,968 INFO L276 IsEmpty]: Start isEmpty. Operand 16750 states and 20122 transitions. [2021-11-23 17:27:12,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2021-11-23 17:27:12,978 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:12,978 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 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] [2021-11-23 17:27:12,999 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 17:27:13,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:13,193 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:13,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:13,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1750997807, now seen corresponding path program 1 times [2021-11-23 17:27:13,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:13,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [411926647] [2021-11-23 17:27:13,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:13,197 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:13,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:13,199 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:13,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:27:13,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:13,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:27:13,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 301 proven. 82 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:27:15,111 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:20,375 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 301 proven. 82 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:27:20,375 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:20,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [411926647] [2021-11-23 17:27:20,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [411926647] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:20,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [135995126] [2021-11-23 17:27:20,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:20,376 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:20,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:20,378 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:20,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (17)] Waiting until timeout for monitored process [2021-11-23 17:27:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:21,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:27:21,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 301 proven. 82 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:27:23,011 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:28,292 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 301 proven. 82 refuted. 0 times theorem prover too weak. 85 trivial. 0 not checked. [2021-11-23 17:27:28,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [135995126] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:28,293 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353133903] [2021-11-23 17:27:28,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:28,293 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:27:28,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:27:28,304 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:27:28,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4c72e0d9-6495-471c-8269-e570faa1d761/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-23 17:27:28,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:28,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:27:28,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 232 proven. 229 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:27:29,710 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 461 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-23 17:27:34,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353133903] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:27:34,202 INFO L186 FreeRefinementEngine]: Found 1 perfect and 5 imperfect interpolant sequences. [2021-11-23 17:27:34,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [3, 3, 3, 3, 4] total 15 [2021-11-23 17:27:34,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357419865] [2021-11-23 17:27:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:34,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:27:34,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:34,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:27:34,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:27:34,204 INFO L87 Difference]: Start difference. First operand 16750 states and 20122 transitions. Second operand has 4 states, 4 states have (on average 84.0) internal successors, (336), 4 states have internal predecessors, (336), 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 17:27:37,446 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 []