./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem14_label12.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_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/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_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/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_22ffcd09-135b-49d2-9986-1983d7292f43/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 4b4b9417667a2b22b66d44994b4ab821a544efcdd53d97f8e0b0627507eab9c4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:50,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:50,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:50,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:50,508 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:50,509 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:50,513 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:50,518 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:50,520 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:50,521 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:50,522 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:50,524 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:50,525 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:50,526 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:50,528 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:50,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:50,530 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:50,532 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:50,534 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:50,537 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:50,539 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:50,552 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:50,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:50,556 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:50,562 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:50,566 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:50,567 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:50,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:50,569 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:50,571 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:50,572 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:50,573 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:50,575 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:50,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:50,578 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:50,579 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:50,580 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:50,580 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:50,581 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:50,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:50,582 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:50,583 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:16:50,615 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:50,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:50,616 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:50,616 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:50,617 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:50,617 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:50,618 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:50,618 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:50,618 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:50,618 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:16:50,619 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:50,619 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:50,619 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:16:50,619 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:16:50,620 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:50,620 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:16:50,620 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:16:50,621 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:16:50,621 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:50,622 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:50,622 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:16:50,622 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:50,622 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:50,623 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:50,623 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:50,623 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:50,623 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:50,624 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:50,624 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:50,624 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:50,625 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:50,625 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:50,625 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:50,625 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:50,626 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:50,626 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:50,626 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:16:50,626 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:16:50,627 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:50,627 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:50,627 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:50,627 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_22ffcd09-135b-49d2-9986-1983d7292f43/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b4b9417667a2b22b66d44994b4ab821a544efcdd53d97f8e0b0627507eab9c4 [2021-11-23 17:16:50,910 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:50,933 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:50,936 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:50,937 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:50,938 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:50,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label12.c [2021-11-23 17:16:51,017 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/b54a84a2c/f1f37445f9a14ab294f798cfadaaba7c/FLAGbb069370d [2021-11-23 17:16:51,648 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:51,648 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c [2021-11-23 17:16:51,664 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/b54a84a2c/f1f37445f9a14ab294f798cfadaaba7c/FLAGbb069370d [2021-11-23 17:16:51,918 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/b54a84a2c/f1f37445f9a14ab294f798cfadaaba7c [2021-11-23 17:16:51,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:51,927 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:51,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:51,929 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:51,937 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:51,938 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:51" (1/1) ... [2021-11-23 17:16:51,939 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6b48fae0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:51, skipping insertion in model container [2021-11-23 17:16:51,940 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:51" (1/1) ... [2021-11-23 17:16:51,948 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:52,012 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:52,307 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_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c[1150,1163] [2021-11-23 17:16:52,623 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:52,632 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:52,647 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_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c[1150,1163] [2021-11-23 17:16:52,771 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:52,787 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:16:52,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52 WrapperNode [2021-11-23 17:16:52,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:52,789 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:52,790 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:16:52,790 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:16:52,800 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,824 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,921 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 858 [2021-11-23 17:16:52,921 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:16:52,922 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:16:52,922 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:16:52,922 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:16:52,932 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,932 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,939 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,940 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,980 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:52,993 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:53,000 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:53,014 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:16:53,015 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:16:53,015 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:16:53,016 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:16:53,017 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:52" (1/1) ... [2021-11-23 17:16:53,026 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:53,054 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:16:53,082 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:16:53,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:16:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:16:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:16:53,141 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:16:53,141 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:16:53,223 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:16:53,225 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:16:54,713 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:16:54,792 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 17:16:54,805 INFO L158 Benchmark]: Toolchain (without parser) took 2875.12ms. Allocated memory was 119.5MB in the beginning and 163.6MB in the end (delta: 44.0MB). Free memory was 79.8MB in the beginning and 117.9MB in the end (delta: -38.1MB). Peak memory consumption was 49.6MB. Max. memory is 16.1GB. [2021-11-23 17:16:54,806 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 119.5MB. Free memory is still 99.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:16:54,808 INFO L158 Benchmark]: CACSL2BoogieTranslator took 859.00ms. Allocated memory is still 119.5MB. Free memory was 79.7MB in the beginning and 74.0MB in the end (delta: 5.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2021-11-23 17:16:54,810 INFO L158 Benchmark]: Boogie Procedure Inliner took 131.96ms. Allocated memory is still 119.5MB. Free memory was 74.0MB in the beginning and 64.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:16:54,811 INFO L158 Benchmark]: Boogie Preprocessor took 92.19ms. Allocated memory is still 119.5MB. Free memory was 64.5MB in the beginning and 58.6MB in the end (delta: 5.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2021-11-23 17:16:54,812 INFO L158 Benchmark]: RCFGBuilder took 1786.26ms. Allocated memory was 119.5MB in the beginning and 163.6MB in the end (delta: 44.0MB). Free memory was 58.6MB in the beginning and 117.9MB in the end (delta: -59.3MB). Peak memory consumption was 32.6MB. Max. memory is 16.1GB. [2021-11-23 17:16:54,821 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 119.5MB. Free memory is still 99.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 859.00ms. Allocated memory is still 119.5MB. Free memory was 79.7MB in the beginning and 74.0MB in the end (delta: 5.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 131.96ms. Allocated memory is still 119.5MB. Free memory was 74.0MB in the beginning and 64.5MB in the end (delta: 9.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 92.19ms. Allocated memory is still 119.5MB. Free memory was 64.5MB in the beginning and 58.6MB in the end (delta: 5.9MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * RCFGBuilder took 1786.26ms. Allocated memory was 119.5MB in the beginning and 163.6MB in the end (delta: 44.0MB). Free memory was 58.6MB in the beginning and 117.9MB in the end (delta: -59.3MB). Peak memory consumption was 32.6MB. 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 17:16:54,853 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/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_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/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_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem14_label12.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/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_22ffcd09-135b-49d2-9986-1983d7292f43/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 4b4b9417667a2b22b66d44994b4ab821a544efcdd53d97f8e0b0627507eab9c4 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:16:57,557 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:16:57,561 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:16:57,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:16:57,614 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:16:57,619 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:16:57,621 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:16:57,626 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:16:57,629 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:16:57,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:16:57,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:16:57,643 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:16:57,644 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:16:57,646 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:16:57,649 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:16:57,654 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:16:57,656 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:16:57,659 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:16:57,663 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:16:57,668 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:16:57,673 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:16:57,674 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:16:57,677 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:16:57,679 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:16:57,686 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:16:57,686 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:16:57,687 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:16:57,689 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:16:57,690 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:16:57,691 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:16:57,691 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:16:57,692 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:16:57,694 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:16:57,695 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:16:57,696 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:16:57,696 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:16:57,697 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:16:57,698 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:16:57,698 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:16:57,700 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:16:57,701 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:16:57,706 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:16:57,747 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:16:57,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:16:57,748 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:16:57,748 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:16:57,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:16:57,749 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:16:57,749 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:16:57,750 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:16:57,750 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:16:57,750 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:16:57,750 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:16:57,751 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:16:57,752 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:16:57,752 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:16:57,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:16:57,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:16:57,752 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:16:57,753 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:16:57,753 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:16:57,753 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:16:57,753 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:16:57,754 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:16:57,754 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:16:57,754 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:16:57,754 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:16:57,754 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:16:57,755 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:16:57,755 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:16:57,755 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:16:57,755 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:16:57,756 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:16:57,756 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:16:57,756 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:16:57,756 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:16:57,757 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:16:57,757 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:16:57,757 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:16:57,757 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:16:57,758 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_22ffcd09-135b-49d2-9986-1983d7292f43/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4b4b9417667a2b22b66d44994b4ab821a544efcdd53d97f8e0b0627507eab9c4 [2021-11-23 17:16:58,124 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:16:58,153 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:16:58,158 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:16:58,160 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:16:58,161 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:16:58,162 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem14_label12.c [2021-11-23 17:16:58,240 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/bfc8e27bf/8a396b72793f449eb3b6a51cafe6b838/FLAG4ba3b0cda [2021-11-23 17:16:58,930 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:16:58,931 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c [2021-11-23 17:16:58,945 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/bfc8e27bf/8a396b72793f449eb3b6a51cafe6b838/FLAG4ba3b0cda [2021-11-23 17:16:59,117 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/data/bfc8e27bf/8a396b72793f449eb3b6a51cafe6b838 [2021-11-23 17:16:59,121 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:16:59,124 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:16:59,126 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:16:59,126 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:16:59,130 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:16:59,132 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:59" (1/1) ... [2021-11-23 17:16:59,133 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2df0fc3a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:16:59, skipping insertion in model container [2021-11-23 17:16:59,134 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:16:59" (1/1) ... [2021-11-23 17:16:59,142 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:16:59,221 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:16:59,382 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_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c[1150,1163] [2021-11-23 17:16:59,794 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:16:59,820 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:16:59,835 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_22ffcd09-135b-49d2-9986-1983d7292f43/sv-benchmarks/c/eca-rers2012/Problem14_label12.c[1150,1163] [2021-11-23 17:17:00,012 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:17:00,028 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:17:00,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00 WrapperNode [2021-11-23 17:17:00,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:17:00,030 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:00,030 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:17:00,031 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:17:00,038 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,065 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,125 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 856 [2021-11-23 17:17:00,126 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:17:00,127 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:17:00,128 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:17:00,128 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:17:00,137 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,137 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,149 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,149 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,194 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,208 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,214 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,221 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:17:00,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:17:00,222 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:17:00,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:17:00,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (1/1) ... [2021-11-23 17:17:00,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:17:00,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:17:00,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:17:00,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:17:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:17:00,333 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:17:00,334 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:17:00,334 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:17:00,423 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:17:00,441 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:17:03,754 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:17:03,765 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:17:03,765 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:17:03,768 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:03 BoogieIcfgContainer [2021-11-23 17:17:03,768 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:17:03,770 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:17:03,770 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:17:03,773 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:17:03,774 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:16:59" (1/3) ... [2021-11-23 17:17:03,774 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55265366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:03, skipping insertion in model container [2021-11-23 17:17:03,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:17:00" (2/3) ... [2021-11-23 17:17:03,775 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55265366 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:17:03, skipping insertion in model container [2021-11-23 17:17:03,775 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:17:03" (3/3) ... [2021-11-23 17:17:03,777 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem14_label12.c [2021-11-23 17:17:03,782 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:17:03,783 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:17:03,861 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:17:03,885 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 17:17:03,894 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:17:03,923 INFO L276 IsEmpty]: Start isEmpty. Operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 17:17:03,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-23 17:17:03,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:03,931 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:03,931 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:03,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:03,937 INFO L85 PathProgramCache]: Analyzing trace with hash 297966002, now seen corresponding path program 1 times [2021-11-23 17:17:03,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:03,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230552225] [2021-11-23 17:17:03,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:03,952 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:03,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:03,955 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:03,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:17:04,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:04,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 37 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:04,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:04,143 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 17:17:04,144 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:04,144 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:04,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230552225] [2021-11-23 17:17:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230552225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:04,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:04,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:04,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561929435] [2021-11-23 17:17:04,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:04,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:04,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:04,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:04,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:04,201 INFO L87 Difference]: Start difference. First operand has 245 states, 243 states have (on average 1.7366255144032923) internal successors, (422), 244 states have internal predecessors, (422), 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 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:07,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:07,817 INFO L93 Difference]: Finished difference Result 685 states and 1216 transitions. [2021-11-23 17:17:07,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:07,831 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2021-11-23 17:17:07,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:07,845 INFO L225 Difference]: With dead ends: 685 [2021-11-23 17:17:07,845 INFO L226 Difference]: Without dead ends: 360 [2021-11-23 17:17:07,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:07,854 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 210 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 577 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:07,855 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 139 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 577 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:17:07,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-11-23 17:17:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2021-11-23 17:17:07,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 359 states have (on average 1.4206128133704736) internal successors, (510), 359 states have internal predecessors, (510), 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 17:17:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 510 transitions. [2021-11-23 17:17:07,949 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 510 transitions. Word has length 8 [2021-11-23 17:17:07,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:07,950 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 510 transitions. [2021-11-23 17:17:07,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:07,951 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 510 transitions. [2021-11-23 17:17:07,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-23 17:17:07,954 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:07,955 INFO L514 BasicCegarLoop]: trace histogram [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 17:17:07,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:17:08,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:08,170 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:08,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:08,170 INFO L85 PathProgramCache]: Analyzing trace with hash -1939991586, now seen corresponding path program 1 times [2021-11-23 17:17:08,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:08,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [50484233] [2021-11-23 17:17:08,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:08,175 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:08,175 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:08,176 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:08,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:17:08,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:08,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:08,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:08,603 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:08,603 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:08,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:08,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [50484233] [2021-11-23 17:17:08,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [50484233] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:08,604 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:08,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:08,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790853233] [2021-11-23 17:17:08,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:08,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:08,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:08,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:08,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:08,607 INFO L87 Difference]: Start difference. First operand 360 states and 510 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:12,168 INFO L93 Difference]: Finished difference Result 1074 states and 1525 transitions. [2021-11-23 17:17:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:12,169 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-23 17:17:12,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:12,174 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:17:12,174 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:17:12,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:12,177 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 111 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:12,178 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 108 Invalid, 609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2021-11-23 17:17:12,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:17:12,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:17:12,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.3034965034965036) internal successors, (932), 715 states have internal predecessors, (932), 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 17:17:12,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 932 transitions. [2021-11-23 17:17:12,219 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 932 transitions. Word has length 77 [2021-11-23 17:17:12,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:12,220 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 932 transitions. [2021-11-23 17:17:12,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:17:12,220 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 932 transitions. [2021-11-23 17:17:12,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-23 17:17:12,223 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:12,224 INFO L514 BasicCegarLoop]: trace histogram [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] [2021-11-23 17:17:12,245 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:12,438 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:12,439 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:12,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:12,439 INFO L85 PathProgramCache]: Analyzing trace with hash -1606595539, now seen corresponding path program 1 times [2021-11-23 17:17:12,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:12,441 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2092438895] [2021-11-23 17:17:12,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:12,441 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:12,441 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:12,442 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:12,468 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:17:12,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:12,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:12,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:13,197 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:13,197 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:13,197 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2092438895] [2021-11-23 17:17:13,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2092438895] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:13,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:13,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:13,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299811963] [2021-11-23 17:17:13,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:13,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:13,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:13,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:13,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:13,200 INFO L87 Difference]: Start difference. First operand 716 states and 932 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 17:17:15,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:15,669 INFO L93 Difference]: Finished difference Result 1074 states and 1452 transitions. [2021-11-23 17:17:15,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:15,670 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 82 [2021-11-23 17:17:15,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:15,675 INFO L225 Difference]: With dead ends: 1074 [2021-11-23 17:17:15,675 INFO L226 Difference]: Without dead ends: 716 [2021-11-23 17:17:15,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:15,678 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 106 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:15,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 114 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:17:15,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2021-11-23 17:17:15,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 716. [2021-11-23 17:17:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 1.2951048951048951) internal successors, (926), 715 states have internal predecessors, (926), 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 17:17:15,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 926 transitions. [2021-11-23 17:17:15,711 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 926 transitions. Word has length 82 [2021-11-23 17:17:15,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:15,712 INFO L470 AbstractCegarLoop]: Abstraction has 716 states and 926 transitions. [2021-11-23 17:17:15,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 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 17:17:15,712 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 926 transitions. [2021-11-23 17:17:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 17:17:15,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:15,718 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:15,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:15,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:15,929 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:15,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:15,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1939408175, now seen corresponding path program 1 times [2021-11-23 17:17:15,930 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:15,931 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [959373762] [2021-11-23 17:17:15,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:15,931 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:15,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:15,932 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:15,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:17:16,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:16,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:17:16,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:17:16,406 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:16,406 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:16,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [959373762] [2021-11-23 17:17:16,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [959373762] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:16,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:16,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:16,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599816317] [2021-11-23 17:17:16,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:16,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:16,408 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:16,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:16,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:16,409 INFO L87 Difference]: Start difference. First operand 716 states and 926 transitions. Second operand has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:17:20,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:20,717 INFO L93 Difference]: Finished difference Result 1786 states and 2393 transitions. [2021-11-23 17:17:20,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:20,718 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 143 [2021-11-23 17:17:20,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:20,726 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:17:20,726 INFO L226 Difference]: Without dead ends: 1250 [2021-11-23 17:17:20,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:20,737 INFO L933 BasicCegarLoop]: 116 mSDtfsCounter, 115 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:20,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 120 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 17:17:20,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1250 states. [2021-11-23 17:17:20,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1250 to 1250. [2021-11-23 17:17:20,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 1.245796637309848) internal successors, (1556), 1249 states have internal predecessors, (1556), 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 17:17:20,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 1556 transitions. [2021-11-23 17:17:20,782 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 1556 transitions. Word has length 143 [2021-11-23 17:17:20,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:20,784 INFO L470 AbstractCegarLoop]: Abstraction has 1250 states and 1556 transitions. [2021-11-23 17:17:20,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 46.0) internal successors, (138), 2 states have internal predecessors, (138), 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 17:17:20,785 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 1556 transitions. [2021-11-23 17:17:20,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-23 17:17:20,797 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:20,797 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:20,805 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Ended with exit code 0 [2021-11-23 17:17:20,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:20,998 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:20,999 INFO L85 PathProgramCache]: Analyzing trace with hash 8556306, now seen corresponding path program 1 times [2021-11-23 17:17:21,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:21,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2026036304] [2021-11-23 17:17:21,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:21,001 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:21,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:21,002 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:21,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:17:21,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:21,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:17:21,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:21,996 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 79 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:17:21,997 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:21,997 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:21,997 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2026036304] [2021-11-23 17:17:21,997 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2026036304] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:21,997 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:21,997 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:17:21,998 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497596471] [2021-11-23 17:17:21,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:21,998 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:17:21,998 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:21,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:17:21,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:17:21,999 INFO L87 Difference]: Start difference. First operand 1250 states and 1556 transitions. Second operand has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 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 17:17:25,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:25,151 INFO L93 Difference]: Finished difference Result 2171 states and 2741 transitions. [2021-11-23 17:17:25,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:17:25,152 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 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 157 [2021-11-23 17:17:25,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:25,159 INFO L225 Difference]: With dead ends: 2171 [2021-11-23 17:17:25,159 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:17:25,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:17:25,162 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 103 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:25,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 114 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2021-11-23 17:17:25,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:17:25,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:17:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.239028944911298) internal successors, (1327), 1071 states have internal predecessors, (1327), 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 17:17:25,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1327 transitions. [2021-11-23 17:17:25,191 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1327 transitions. Word has length 157 [2021-11-23 17:17:25,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:25,192 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1327 transitions. [2021-11-23 17:17:25,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.25) internal successors, (157), 3 states have internal predecessors, (157), 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 17:17:25,192 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1327 transitions. [2021-11-23 17:17:25,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-23 17:17:25,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:25,195 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:25,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:25,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:25,407 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:25,407 INFO L85 PathProgramCache]: Analyzing trace with hash 24621715, now seen corresponding path program 1 times [2021-11-23 17:17:25,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:25,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1991144319] [2021-11-23 17:17:25,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:25,409 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:25,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:25,411 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:25,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:17:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:25,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:25,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:26,841 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 68 trivial. 0 not checked. [2021-11-23 17:17:26,842 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:17:26,842 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:26,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1991144319] [2021-11-23 17:17:26,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1991144319] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:17:26,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:17:26,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:17:26,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731322731] [2021-11-23 17:17:26,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:26,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:26,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:26,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:26,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:26,844 INFO L87 Difference]: Start difference. First operand 1072 states and 1327 transitions. Second operand has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 17:17:29,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:29,282 INFO L93 Difference]: Finished difference Result 1786 states and 2287 transitions. [2021-11-23 17:17:29,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:29,283 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 183 [2021-11-23 17:17:29,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:29,289 INFO L225 Difference]: With dead ends: 1786 [2021-11-23 17:17:29,290 INFO L226 Difference]: Without dead ends: 1072 [2021-11-23 17:17:29,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:17:29,292 INFO L933 BasicCegarLoop]: 119 mSDtfsCounter, 73 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:29,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 123 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2021-11-23 17:17:29,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2021-11-23 17:17:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2021-11-23 17:17:29,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1071 states have (on average 1.2334267040149394) internal successors, (1321), 1071 states have internal predecessors, (1321), 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 17:17:29,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1321 transitions. [2021-11-23 17:17:29,321 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1321 transitions. Word has length 183 [2021-11-23 17:17:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:29,321 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1321 transitions. [2021-11-23 17:17:29,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.666666666666664) internal successors, (116), 2 states have internal predecessors, (116), 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 17:17:29,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1321 transitions. [2021-11-23 17:17:29,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2021-11-23 17:17:29,326 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:29,327 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:17:29,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 17:17:29,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:29,538 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:29,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:29,539 INFO L85 PathProgramCache]: Analyzing trace with hash 1591531491, now seen corresponding path program 1 times [2021-11-23 17:17:29,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:29,541 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2099452302] [2021-11-23 17:17:29,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:29,542 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:29,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:29,543 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:29,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:17:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:29,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:30,673 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 17 proven. 135 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:17:30,673 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:31,634 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 152 proven. 0 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:17:31,635 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:31,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2099452302] [2021-11-23 17:17:31,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2099452302] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:17:31,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:17:31,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:17:31,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706299135] [2021-11-23 17:17:31,636 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:31,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:31,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:31,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:31,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:31,638 INFO L87 Difference]: Start difference. First operand 1072 states and 1321 transitions. Second operand has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 17:17:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:39,633 INFO L93 Difference]: Finished difference Result 2142 states and 2812 transitions. [2021-11-23 17:17:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:39,633 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 287 [2021-11-23 17:17:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:39,642 INFO L225 Difference]: With dead ends: 2142 [2021-11-23 17:17:39,642 INFO L226 Difference]: Without dead ends: 1428 [2021-11-23 17:17:39,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 569 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:39,644 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 461 mSolverCounterSat, 152 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 152 IncrementalHoareTripleChecker+Valid, 461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:39,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 59 Invalid, 613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [152 Valid, 461 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2021-11-23 17:17:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2021-11-23 17:17:39,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 1428. [2021-11-23 17:17:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1428 states, 1427 states have (on average 1.238262088297127) internal successors, (1767), 1427 states have internal predecessors, (1767), 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 17:17:39,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1428 states to 1428 states and 1767 transitions. [2021-11-23 17:17:39,679 INFO L78 Accepts]: Start accepts. Automaton has 1428 states and 1767 transitions. Word has length 287 [2021-11-23 17:17:39,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:39,680 INFO L470 AbstractCegarLoop]: Abstraction has 1428 states and 1767 transitions. [2021-11-23 17:17:39,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 61.333333333333336) internal successors, (184), 3 states have internal predecessors, (184), 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 17:17:39,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1428 states and 1767 transitions. [2021-11-23 17:17:39,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 399 [2021-11-23 17:17:39,703 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:39,703 INFO L514 BasicCegarLoop]: trace histogram [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, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:39,724 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:39,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:39,918 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:39,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:39,919 INFO L85 PathProgramCache]: Analyzing trace with hash -161196064, now seen corresponding path program 1 times [2021-11-23 17:17:39,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:39,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [265653723] [2021-11-23 17:17:39,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:39,921 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:39,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:39,922 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:39,923 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:17:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:40,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:17:40,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 294 proven. 159 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:17:41,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:17:42,346 INFO L134 CoverageAnalysis]: Checked inductivity of 563 backedges. 453 proven. 0 refuted. 0 times theorem prover too weak. 110 trivial. 0 not checked. [2021-11-23 17:17:42,346 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:17:42,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [265653723] [2021-11-23 17:17:42,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [265653723] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:17:42,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:17:42,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:17:42,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833360285] [2021-11-23 17:17:42,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:17:42,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:17:42,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:17:42,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:17:42,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:17:42,350 INFO L87 Difference]: Start difference. First operand 1428 states and 1767 transitions. Second operand has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 17:17:50,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:17:50,007 INFO L93 Difference]: Finished difference Result 3210 states and 4150 transitions. [2021-11-23 17:17:50,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:17:50,008 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 398 [2021-11-23 17:17:50,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:17:50,017 INFO L225 Difference]: With dead ends: 3210 [2021-11-23 17:17:50,018 INFO L226 Difference]: Without dead ends: 2140 [2021-11-23 17:17:50,020 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 794 GetRequests, 791 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 17:17:50,020 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 113 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:17:50,021 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 248 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 17:17:50,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2140 states. [2021-11-23 17:17:50,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2140 to 2140. [2021-11-23 17:17:50,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2140 states, 2139 states have (on average 1.2463768115942029) internal successors, (2666), 2139 states have internal predecessors, (2666), 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 17:17:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2140 states to 2140 states and 2666 transitions. [2021-11-23 17:17:50,072 INFO L78 Accepts]: Start accepts. Automaton has 2140 states and 2666 transitions. Word has length 398 [2021-11-23 17:17:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:17:50,073 INFO L470 AbstractCegarLoop]: Abstraction has 2140 states and 2666 transitions. [2021-11-23 17:17:50,074 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 96.66666666666667) internal successors, (290), 3 states have internal predecessors, (290), 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 17:17:50,074 INFO L276 IsEmpty]: Start isEmpty. Operand 2140 states and 2666 transitions. [2021-11-23 17:17:50,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 415 [2021-11-23 17:17:50,082 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:17:50,083 INFO L514 BasicCegarLoop]: trace histogram [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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:17:50,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:17:50,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:17:50,299 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:17:50,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:17:50,300 INFO L85 PathProgramCache]: Analyzing trace with hash 226361864, now seen corresponding path program 1 times [2021-11-23 17:17:50,302 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:17:50,302 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1031565926] [2021-11-23 17:17:50,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:17:50,302 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:17:50,303 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:17:50,304 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:17:50,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:17:50,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:17:50,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:17:50,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:17:52,372 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 230 proven. 277 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:17:52,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:01,000 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 478 proven. 29 refuted. 0 times theorem prover too weak. 104 trivial. 0 not checked. [2021-11-23 17:18:01,000 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:18:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1031565926] [2021-11-23 17:18:01,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1031565926] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:01,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [611592828] [2021-11-23 17:18:01,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:01,001 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:18:01,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:18:01,004 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:18:01,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-11-23 17:18:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:01,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:18:01,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 310 proven. 6 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:18:02,776 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:04,550 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 310 proven. 6 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:18:04,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [611592828] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:04,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358916908] [2021-11-23 17:18:04,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:18:04,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:18:04,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:18:04,557 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:18:04,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 17:18:04,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:18:04,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 482 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:18:04,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:18:06,700 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 172 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:18:06,701 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:18:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 172 proven. 144 refuted. 0 times theorem prover too weak. 295 trivial. 0 not checked. [2021-11-23 17:18:08,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358916908] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:18:08,187 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:18:08,188 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 7, 7, 4, 4] total 18 [2021-11-23 17:18:08,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032830323] [2021-11-23 17:18:08,189 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:18:08,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 17:18:08,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:18:08,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 17:18:08,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:18:08,193 INFO L87 Difference]: Start difference. First operand 2140 states and 2666 transitions. Second operand has 18 states, 18 states have (on average 49.333333333333336) internal successors, (888), 18 states have internal predecessors, (888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:18:42,733 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:18:59,879 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:19:12,539 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:19:28,504 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.69s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:19:29,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:19:29,527 INFO L93 Difference]: Finished difference Result 5961 states and 7555 transitions. [2021-11-23 17:19:29,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-23 17:19:29,533 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 49.333333333333336) internal successors, (888), 18 states have internal predecessors, (888), 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 414 [2021-11-23 17:19:29,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:19:29,556 INFO L225 Difference]: With dead ends: 5961 [2021-11-23 17:19:29,556 INFO L226 Difference]: Without dead ends: 3920 [2021-11-23 17:19:29,559 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2495 GetRequests, 2468 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=194, Invalid=618, Unknown=0, NotChecked=0, Total=812 [2021-11-23 17:19:29,572 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 2163 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 4500 mSolverCounterSat, 1211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 73.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2163 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 5711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1211 IncrementalHoareTripleChecker+Valid, 4500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 78.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:19:29,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2163 Valid, 99 Invalid, 5711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1211 Valid, 4500 Invalid, 0 Unknown, 0 Unchecked, 78.1s Time] [2021-11-23 17:19:29,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3920 states. [2021-11-23 17:19:29,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3920 to 3564. [2021-11-23 17:19:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 1.0836373842267752) internal successors, (3861), 3563 states have internal predecessors, (3861), 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 17:19:29,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 3861 transitions. [2021-11-23 17:19:29,662 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 3861 transitions. Word has length 414 [2021-11-23 17:19:29,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:19:29,663 INFO L470 AbstractCegarLoop]: Abstraction has 3564 states and 3861 transitions. [2021-11-23 17:19:29,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 49.333333333333336) internal successors, (888), 18 states have internal predecessors, (888), 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 17:19:29,664 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 3861 transitions. [2021-11-23 17:19:29,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 663 [2021-11-23 17:19:29,670 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:19:29,671 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 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 17:19:29,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:29,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:30,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:19:30,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:19:30,277 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:19:30,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:19:30,277 INFO L85 PathProgramCache]: Analyzing trace with hash -1409826889, now seen corresponding path program 1 times [2021-11-23 17:19:30,280 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:19:30,280 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1572772013] [2021-11-23 17:19:30,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:19:30,280 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:19:30,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:19:30,281 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:19:30,282 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:19:30,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:19:30,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:19:30,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:19:39,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 29 proven. 898 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:19:39,912 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:09,738 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 659 proven. 268 refuted. 0 times theorem prover too weak. 217 trivial. 0 not checked. [2021-11-23 17:20:09,738 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:09,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1572772013] [2021-11-23 17:20:09,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1572772013] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:09,739 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [149425947] [2021-11-23 17:20:09,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:09,739 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:09,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:09,750 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:09,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:20:10,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 737 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:20:10,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:11,059 INFO L134 CoverageAnalysis]: Checked inductivity of 1144 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:20:11,059 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:11,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [149425947] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:11,059 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:20:11,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 20 [2021-11-23 17:20:11,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377162931] [2021-11-23 17:20:11,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:11,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:11,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:11,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:11,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:20:11,063 INFO L87 Difference]: Start difference. First operand 3564 states and 3861 transitions. Second operand has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 17:20:13,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:13,448 INFO L93 Difference]: Finished difference Result 7482 states and 8259 transitions. [2021-11-23 17:20:13,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:13,449 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 662 [2021-11-23 17:20:13,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:13,467 INFO L225 Difference]: With dead ends: 7482 [2021-11-23 17:20:13,467 INFO L226 Difference]: Without dead ends: 4632 [2021-11-23 17:20:13,471 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1983 GetRequests, 1965 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:20:13,472 INFO L933 BasicCegarLoop]: 219 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 412 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:13,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 224 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 412 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:20:13,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4632 states. [2021-11-23 17:20:13,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4632 to 4632. [2021-11-23 17:20:13,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 1.078600734182682) internal successors, (4995), 4631 states have internal predecessors, (4995), 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 17:20:13,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 4995 transitions. [2021-11-23 17:20:13,603 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 4995 transitions. Word has length 662 [2021-11-23 17:20:13,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:13,604 INFO L470 AbstractCegarLoop]: Abstraction has 4632 states and 4995 transitions. [2021-11-23 17:20:13,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 62.666666666666664) internal successors, (188), 3 states have internal predecessors, (188), 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 17:20:13,605 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 4995 transitions. [2021-11-23 17:20:13,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 738 [2021-11-23 17:20:13,614 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:13,616 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:13,623 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:13,828 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:14,018 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:14,019 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:14,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:14,019 INFO L85 PathProgramCache]: Analyzing trace with hash 2048018218, now seen corresponding path program 1 times [2021-11-23 17:20:14,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:14,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2050433403] [2021-11-23 17:20:14,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:14,024 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:14,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:14,024 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:14,028 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:20:14,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:14,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:20:14,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:25,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 0 proven. 1301 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:20:25,063 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 797 proven. 504 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:20:50,569 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:20:50,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2050433403] [2021-11-23 17:20:50,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2050433403] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:50,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2025742244] [2021-11-23 17:20:50,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:50,570 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:20:50,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:20:50,572 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:20:50,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:20:50,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:50,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:20:50,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:52,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 403 proven. 6 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:20:52,157 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:20:53,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 403 proven. 6 refuted. 0 times theorem prover too weak. 1115 trivial. 0 not checked. [2021-11-23 17:20:53,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2025742244] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:20:53,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462114740] [2021-11-23 17:20:53,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:53,135 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:20:53,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:20:53,137 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:20:53,137 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-23 17:20:53,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:53,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 820 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:20:53,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:20:54,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1524 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 1489 trivial. 0 not checked. [2021-11-23 17:20:54,254 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:20:54,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462114740] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:20:54,254 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:20:54,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11, 11, 5, 5] total 24 [2021-11-23 17:20:54,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776161317] [2021-11-23 17:20:54,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:20:54,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:20:54,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:20:54,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:20:54,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:20:54,258 INFO L87 Difference]: Start difference. First operand 4632 states and 4995 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:20:58,671 INFO L93 Difference]: Finished difference Result 9440 states and 10233 transitions. [2021-11-23 17:20:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:20:58,671 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 737 [2021-11-23 17:20:58,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:20:58,701 INFO L225 Difference]: With dead ends: 9440 [2021-11-23 17:20:58,701 INFO L226 Difference]: Without dead ends: 5522 [2021-11-23 17:20:58,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3680 GetRequests, 3658 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=154, Invalid=398, Unknown=0, NotChecked=0, Total=552 [2021-11-23 17:20:58,707 INFO L933 BasicCegarLoop]: 216 mSDtfsCounter, 177 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 413 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 177 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:20:58,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [177 Valid, 221 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 413 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2021-11-23 17:20:58,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2021-11-23 17:20:58,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5522. [2021-11-23 17:20:58,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5522 states, 5521 states have (on average 1.0688281108494837) internal successors, (5901), 5521 states have internal predecessors, (5901), 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 17:20:58,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5522 states to 5522 states and 5901 transitions. [2021-11-23 17:20:58,844 INFO L78 Accepts]: Start accepts. Automaton has 5522 states and 5901 transitions. Word has length 737 [2021-11-23 17:20:58,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:20:58,846 INFO L470 AbstractCegarLoop]: Abstraction has 5522 states and 5901 transitions. [2021-11-23 17:20:58,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:20:58,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5522 states and 5901 transitions. [2021-11-23 17:20:58,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 745 [2021-11-23 17:20:58,855 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:20:58,856 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:20:58,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:59,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:20:59,282 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Ended with exit code 0 [2021-11-23 17:20:59,473 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:20:59,474 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:20:59,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:20:59,475 INFO L85 PathProgramCache]: Analyzing trace with hash -881660578, now seen corresponding path program 1 times [2021-11-23 17:20:59,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:20:59,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1672465984] [2021-11-23 17:20:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:20:59,478 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:20:59,479 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:20:59,479 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:20:59,480 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:20:59,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:20:59,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:20:59,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:08,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 438 proven. 898 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:21:08,968 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:21:40,043 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 1068 proven. 268 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:21:40,043 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:21:40,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1672465984] [2021-11-23 17:21:40,043 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1672465984] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:21:40,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [902450192] [2021-11-23 17:21:40,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:40,044 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:21:40,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:21:40,045 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:21:40,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:21:40,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:40,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:21:40,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1559 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 1524 trivial. 0 not checked. [2021-11-23 17:21:41,230 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:21:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [902450192] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:21:41,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:21:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10] total 20 [2021-11-23 17:21:41,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092787436] [2021-11-23 17:21:41,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:21:41,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:21:41,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:21:41,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:21:41,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:21:41,234 INFO L87 Difference]: Start difference. First operand 5522 states and 5901 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:21:43,620 INFO L93 Difference]: Finished difference Result 12644 states and 13626 transitions. [2021-11-23 17:21:43,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:21:43,621 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 744 [2021-11-23 17:21:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:21:43,661 INFO L225 Difference]: With dead ends: 12644 [2021-11-23 17:21:43,661 INFO L226 Difference]: Without dead ends: 6946 [2021-11-23 17:21:43,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2229 GetRequests, 2211 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-11-23 17:21:43,668 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 173 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 460 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:21:43,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 231 Invalid, 460 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:21:43,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6946 states. [2021-11-23 17:21:43,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6946 to 6234. [2021-11-23 17:21:43,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6234 states, 6233 states have (on average 1.070912883041874) internal successors, (6675), 6233 states have internal predecessors, (6675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6234 states to 6234 states and 6675 transitions. [2021-11-23 17:21:43,862 INFO L78 Accepts]: Start accepts. Automaton has 6234 states and 6675 transitions. Word has length 744 [2021-11-23 17:21:43,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:21:43,864 INFO L470 AbstractCegarLoop]: Abstraction has 6234 states and 6675 transitions. [2021-11-23 17:21:43,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:21:43,866 INFO L276 IsEmpty]: Start isEmpty. Operand 6234 states and 6675 transitions. [2021-11-23 17:21:43,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 751 [2021-11-23 17:21:43,875 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:21:43,876 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:21:43,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:44,087 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Forceful destruction successful, exit code 0 [2021-11-23 17:21:44,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:21:44,279 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:21:44,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:21:44,279 INFO L85 PathProgramCache]: Analyzing trace with hash -851028113, now seen corresponding path program 1 times [2021-11-23 17:21:44,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:21:44,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1101552173] [2021-11-23 17:21:44,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:21:44,283 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:21:44,283 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:21:44,284 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:21:44,289 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 17:21:44,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:21:44,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:21:44,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:21:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 468 proven. 898 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:21:54,259 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:25,303 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 1098 proven. 268 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:22:25,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:22:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1101552173] [2021-11-23 17:22:25,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1101552173] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:22:25,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [631889013] [2021-11-23 17:22:25,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:25,304 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:22:25,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:22:25,305 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:22:25,310 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Waiting until timeout for monitored process [2021-11-23 17:22:25,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:25,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:22:25,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:27,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 133 proven. 409 refuted. 0 times theorem prover too weak. 1047 trivial. 0 not checked. [2021-11-23 17:22:27,097 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:22:27,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1589 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 1554 trivial. 0 not checked. [2021-11-23 17:22:27,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [631889013] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:22:27,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:22:27,812 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [10, 10, 5] total 23 [2021-11-23 17:22:27,812 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39780206] [2021-11-23 17:22:27,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:22:27,813 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:22:27,813 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:22:27,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:22:27,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:22:27,814 INFO L87 Difference]: Start difference. First operand 6234 states and 6675 transitions. Second operand has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:30,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:22:30,004 INFO L93 Difference]: Finished difference Result 7126 states and 7652 transitions. [2021-11-23 17:22:30,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:22:30,005 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 750 [2021-11-23 17:22:30,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:22:30,021 INFO L225 Difference]: With dead ends: 7126 [2021-11-23 17:22:30,021 INFO L226 Difference]: Without dead ends: 7124 [2021-11-23 17:22:30,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2996 GetRequests, 2975 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2021-11-23 17:22:30,025 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 192 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 459 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:22:30,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 16 Invalid, 459 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2021-11-23 17:22:30,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7124 states. [2021-11-23 17:22:30,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7124 to 6412. [2021-11-23 17:22:30,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6412 states, 6411 states have (on average 1.074091405396974) internal successors, (6886), 6411 states have internal predecessors, (6886), 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 17:22:30,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6412 states to 6412 states and 6886 transitions. [2021-11-23 17:22:30,144 INFO L78 Accepts]: Start accepts. Automaton has 6412 states and 6886 transitions. Word has length 750 [2021-11-23 17:22:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:22:30,145 INFO L470 AbstractCegarLoop]: Abstraction has 6412 states and 6886 transitions. [2021-11-23 17:22:30,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 63.0) internal successors, (189), 3 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:22:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 6412 states and 6886 transitions. [2021-11-23 17:22:30,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 885 [2021-11-23 17:22:30,160 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:22:30,161 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:22:30,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (21)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:30,374 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 17:22:30,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:22:30,563 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:22:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:22:30,564 INFO L85 PathProgramCache]: Analyzing trace with hash -990658781, now seen corresponding path program 1 times [2021-11-23 17:22:30,588 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:22:30,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2069321195] [2021-11-23 17:22:30,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:22:30,589 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:22:30,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:22:30,593 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:22:30,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Waiting until timeout for monitored process [2021-11-23 17:22:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:22:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-23 17:22:30,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:22:41,618 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 113 proven. 1918 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-23 17:22:41,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:08,079 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 1199 proven. 832 refuted. 0 times theorem prover too weak. 191 trivial. 0 not checked. [2021-11-23 17:23:08,079 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:23:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2069321195] [2021-11-23 17:23:08,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2069321195] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:08,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [672406637] [2021-11-23 17:23:08,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:08,080 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:23:08,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:23:08,080 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:23:08,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Waiting until timeout for monitored process [2021-11-23 17:23:08,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:08,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:23:08,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:12,205 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 41 proven. 1889 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-23 17:23:12,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:20,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 1012 proven. 918 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-23 17:23:20,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [672406637] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:20,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172927891] [2021-11-23 17:23:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:23:20,318 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:23:20,318 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:23:20,319 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:23:20,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-23 17:23:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:23:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:23:20,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:23:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 1020 proven. 898 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 17:23:22,949 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:23:28,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2222 backedges. 1731 proven. 268 refuted. 0 times theorem prover too weak. 223 trivial. 0 not checked. [2021-11-23 17:23:28,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172927891] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:23:28,459 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:23:28,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 6, 7, 4, 5] total 30 [2021-11-23 17:23:28,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115481903] [2021-11-23 17:23:28,462 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:23:28,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-23 17:23:28,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:23:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-23 17:23:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=623, Unknown=0, NotChecked=0, Total=870 [2021-11-23 17:23:28,469 INFO L87 Difference]: Start difference. First operand 6412 states and 6886 transitions. Second operand has 30 states, 30 states have (on average 86.36666666666666) internal successors, (2591), 30 states have internal predecessors, (2591), 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 17:23:39,711 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:56,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:23:58,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.15s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:24:02,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:24:02,074 INFO L93 Difference]: Finished difference Result 13872 states and 14862 transitions. [2021-11-23 17:24:02,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-23 17:24:02,075 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 86.36666666666666) internal successors, (2591), 30 states have internal predecessors, (2591), 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 884 [2021-11-23 17:24:02,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:24:02,085 INFO L225 Difference]: With dead ends: 13872 [2021-11-23 17:24:02,085 INFO L226 Difference]: Without dead ends: 7462 [2021-11-23 17:24:02,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5319 GetRequests, 5277 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=546, Invalid=1260, Unknown=0, NotChecked=0, Total=1806 [2021-11-23 17:24:02,092 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 3044 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 7188 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 30.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3044 SdHoareTripleChecker+Valid, 122 SdHoareTripleChecker+Invalid, 7475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 7188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 31.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:24:02,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3044 Valid, 122 Invalid, 7475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 7188 Invalid, 0 Unknown, 0 Unchecked, 31.6s Time] [2021-11-23 17:24:02,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7462 states. [2021-11-23 17:24:02,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7462 to 6759. [2021-11-23 17:24:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6759 states, 6758 states have (on average 1.061408700799053) internal successors, (7173), 6758 states have internal predecessors, (7173), 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 17:24:02,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6759 states to 6759 states and 7173 transitions. [2021-11-23 17:24:02,218 INFO L78 Accepts]: Start accepts. Automaton has 6759 states and 7173 transitions. Word has length 884 [2021-11-23 17:24:02,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:24:02,219 INFO L470 AbstractCegarLoop]: Abstraction has 6759 states and 7173 transitions. [2021-11-23 17:24:02,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 86.36666666666666) internal successors, (2591), 30 states have internal predecessors, (2591), 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 17:24:02,220 INFO L276 IsEmpty]: Start isEmpty. Operand 6759 states and 7173 transitions. [2021-11-23 17:24:02,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1023 [2021-11-23 17:24:02,254 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:24:02,255 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-11-23 17:24:02,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (22)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:02,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (23)] Ended with exit code 0 [2021-11-23 17:24:02,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-23 17:24:02,870 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:02,870 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:24:02,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:24:02,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1940981368, now seen corresponding path program 1 times [2021-11-23 17:24:02,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:24:02,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [853860806] [2021-11-23 17:24:02,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:02,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:24:02,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:24:02,877 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:24:02,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Waiting until timeout for monitored process [2021-11-23 17:24:03,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:03,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 17:24:03,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 160 proven. 2110 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-11-23 17:24:13,047 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:35,368 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 1520 proven. 750 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2021-11-23 17:24:35,368 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:24:35,368 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [853860806] [2021-11-23 17:24:35,368 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [853860806] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:35,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [548464698] [2021-11-23 17:24:35,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:35,369 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:24:35,369 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:24:35,370 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:24:35,372 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Waiting until timeout for monitored process [2021-11-23 17:24:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:35,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:24:35,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:39,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 1958 proven. 309 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-23 17:24:39,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 1958 proven. 309 refuted. 0 times theorem prover too weak. 725 trivial. 0 not checked. [2021-11-23 17:24:43,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [548464698] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:43,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711521800] [2021-11-23 17:24:43,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:24:43,729 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:24:43,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:24:43,730 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:24:43,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-23 17:24:44,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:24:44,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 1124 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:24:44,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:24:48,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 1952 proven. 93 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2021-11-23 17:24:48,718 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:24:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 2992 backedges. 1952 proven. 93 refuted. 0 times theorem prover too weak. 947 trivial. 0 not checked. [2021-11-23 17:24:53,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711521800] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:24:53,487 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:24:53,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 6, 6, 4, 4] total 26 [2021-11-23 17:24:53,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096132546] [2021-11-23 17:24:53,490 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:24:53,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-23 17:24:53,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:24:53,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-23 17:24:53,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=491, Unknown=0, NotChecked=0, Total=650 [2021-11-23 17:24:53,495 INFO L87 Difference]: Start difference. First operand 6759 states and 7173 transitions. Second operand has 26 states, 26 states have (on average 64.5) internal successors, (1677), 26 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:07,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:07,700 INFO L93 Difference]: Finished difference Result 13239 states and 14079 transitions. [2021-11-23 17:25:07,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-23 17:25:07,701 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 64.5) internal successors, (1677), 26 states have internal predecessors, (1677), 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 1022 [2021-11-23 17:25:07,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:07,714 INFO L225 Difference]: With dead ends: 13239 [2021-11-23 17:25:07,714 INFO L226 Difference]: Without dead ends: 6829 [2021-11-23 17:25:07,719 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6150 GetRequests, 6111 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=355, Invalid=1285, Unknown=0, NotChecked=0, Total=1640 [2021-11-23 17:25:07,720 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 1566 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 9544 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1566 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 9695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 9544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:07,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1566 Valid, 177 Invalid, 9695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 9544 Invalid, 0 Unknown, 0 Unchecked, 13.2s Time] [2021-11-23 17:25:07,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6829 states. [2021-11-23 17:25:07,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6829 to 6024. [2021-11-23 17:25:07,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6024 states, 6023 states have (on average 1.0518014278598704) internal successors, (6335), 6023 states have internal predecessors, (6335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:07,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6024 states to 6024 states and 6335 transitions. [2021-11-23 17:25:07,853 INFO L78 Accepts]: Start accepts. Automaton has 6024 states and 6335 transitions. Word has length 1022 [2021-11-23 17:25:07,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:07,854 INFO L470 AbstractCegarLoop]: Abstraction has 6024 states and 6335 transitions. [2021-11-23 17:25:07,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 64.5) internal successors, (1677), 26 states have internal predecessors, (1677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:07,855 INFO L276 IsEmpty]: Start isEmpty. Operand 6024 states and 6335 transitions. [2021-11-23 17:25:07,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2021-11-23 17:25:07,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:07,873 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-11-23 17:25:07,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (25)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:08,090 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (26)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:08,316 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-11-23 17:25:08,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:25:08,488 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:08,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:08,489 INFO L85 PathProgramCache]: Analyzing trace with hash -858884270, now seen corresponding path program 1 times [2021-11-23 17:25:08,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:08,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [815306045] [2021-11-23 17:25:08,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:08,494 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:08,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:08,495 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:08,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Waiting until timeout for monitored process [2021-11-23 17:25:08,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:08,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:25:08,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:17,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 936 proven. 2295 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-11-23 17:25:17,233 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 2529 proven. 129 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2021-11-23 17:25:34,251 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [815306045] [2021-11-23 17:25:34,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [815306045] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:34,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [718580455] [2021-11-23 17:25:34,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:34,252 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:34,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:34,253 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:34,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Waiting until timeout for monitored process [2021-11-23 17:25:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:34,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 1210 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:25:34,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:37,890 INFO L134 CoverageAnalysis]: Checked inductivity of 3608 backedges. 936 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-23 17:25:37,891 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:37,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [718580455] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:37,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:25:37,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13, 12] total 27 [2021-11-23 17:25:37,892 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569472695] [2021-11-23 17:25:37,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:37,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:25:37,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:37,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:25:37,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:25:37,894 INFO L87 Difference]: Start difference. First operand 6024 states and 6335 transitions. Second operand has 6 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:40,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:40,932 INFO L93 Difference]: Finished difference Result 11544 states and 12233 transitions. [2021-11-23 17:25:40,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:25:40,932 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 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 1099 [2021-11-23 17:25:40,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:40,947 INFO L225 Difference]: With dead ends: 11544 [2021-11-23 17:25:40,947 INFO L226 Difference]: Without dead ends: 6489 [2021-11-23 17:25:40,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3294 GetRequests, 3269 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=147, Invalid=555, Unknown=0, NotChecked=0, Total=702 [2021-11-23 17:25:40,954 INFO L933 BasicCegarLoop]: 225 mSDtfsCounter, 138 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 872 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:40,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [138 Valid, 234 Invalid, 872 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2021-11-23 17:25:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-11-23 17:25:41,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5777. [2021-11-23 17:25:41,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5777 states, 5776 states have (on average 1.0526315789473684) internal successors, (6080), 5776 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:41,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5777 states to 5777 states and 6080 transitions. [2021-11-23 17:25:41,093 INFO L78 Accepts]: Start accepts. Automaton has 5777 states and 6080 transitions. Word has length 1099 [2021-11-23 17:25:41,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:41,095 INFO L470 AbstractCegarLoop]: Abstraction has 5777 states and 6080 transitions. [2021-11-23 17:25:41,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 55.5) internal successors, (333), 6 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:41,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5777 states and 6080 transitions. [2021-11-23 17:25:41,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1182 [2021-11-23 17:25:41,116 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:41,117 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 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, 2, 2, 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] [2021-11-23 17:25:41,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (29)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:41,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (28)] Forceful destruction successful, exit code 0 [2021-11-23 17:25:41,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:25:41,520 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:41,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:41,521 INFO L85 PathProgramCache]: Analyzing trace with hash -1337116053, now seen corresponding path program 1 times [2021-11-23 17:25:41,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:41,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1109201612] [2021-11-23 17:25:41,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:41,527 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:41,527 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:41,528 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:41,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Waiting until timeout for monitored process [2021-11-23 17:25:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:41,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:41,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 1690 proven. 2210 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-23 17:25:45,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:25:50,496 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 3230 proven. 97 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-11-23 17:25:50,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:25:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1109201612] [2021-11-23 17:25:50,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1109201612] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:25:50,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1124130639] [2021-11-23 17:25:50,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:50,498 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:50,498 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:25:50,508 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:25:50,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Waiting until timeout for monitored process [2021-11-23 17:25:51,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:51,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 1301 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:25:51,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:25:53,702 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 1753 proven. 0 refuted. 0 times theorem prover too weak. 2638 trivial. 0 not checked. [2021-11-23 17:25:53,703 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:25:53,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1124130639] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:25:53,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:25:53,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6, 5] total 14 [2021-11-23 17:25:53,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637920601] [2021-11-23 17:25:53,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:25:53,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:25:53,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:25:53,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:25:53,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:25:53,706 INFO L87 Difference]: Start difference. First operand 5777 states and 6080 transitions. Second operand has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:56,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:25:56,636 INFO L93 Difference]: Finished difference Result 10457 states and 11055 transitions. [2021-11-23 17:25:56,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:25:56,637 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 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 1181 [2021-11-23 17:25:56,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:25:56,648 INFO L225 Difference]: With dead ends: 10457 [2021-11-23 17:25:56,648 INFO L226 Difference]: Without dead ends: 5599 [2021-11-23 17:25:56,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3540 GetRequests, 3528 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:25:56,655 INFO L933 BasicCegarLoop]: 230 mSDtfsCounter, 66 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 738 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:25:56,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 254 Invalid, 741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 738 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2021-11-23 17:25:56,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-11-23 17:25:56,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 5599. [2021-11-23 17:25:56,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 1.0494819578420864) internal successors, (5875), 5598 states have internal predecessors, (5875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:56,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 5875 transitions. [2021-11-23 17:25:56,762 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 5875 transitions. Word has length 1181 [2021-11-23 17:25:56,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:25:56,764 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 5875 transitions. [2021-11-23 17:25:56,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 65.16666666666667) internal successors, (391), 6 states have internal predecessors, (391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:25:56,768 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 5875 transitions. [2021-11-23 17:25:56,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1185 [2021-11-23 17:25:56,789 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:25:56,790 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 5, 5, 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, 2, 2, 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] [2021-11-23 17:25:56,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (30)] Ended with exit code 0 [2021-11-23 17:25:57,006 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (31)] Ended with exit code 0 [2021-11-23 17:25:57,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:25:57,205 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:25:57,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:25:57,206 INFO L85 PathProgramCache]: Analyzing trace with hash -520283905, now seen corresponding path program 1 times [2021-11-23 17:25:57,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:25:57,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722820989] [2021-11-23 17:25:57,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:25:57,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:25:57,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:25:57,232 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:25:57,237 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Waiting until timeout for monitored process [2021-11-23 17:25:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:25:57,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:25:57,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:00,777 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 1696 proven. 2225 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-23 17:26:00,777 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:06,125 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 3248 proven. 100 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-11-23 17:26:06,125 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722820989] [2021-11-23 17:26:06,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722820989] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:06,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [945671194] [2021-11-23 17:26:06,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:06,126 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:06,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:06,126 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:06,131 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Waiting until timeout for monitored process [2021-11-23 17:26:06,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:06,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:26:06,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 2350 proven. 22 refuted. 0 times theorem prover too weak. 2040 trivial. 0 not checked. [2021-11-23 17:26:09,518 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:12,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 2350 proven. 22 refuted. 0 times theorem prover too weak. 2040 trivial. 0 not checked. [2021-11-23 17:26:12,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [945671194] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:12,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136213147] [2021-11-23 17:26:12,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:12,277 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:12,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:26:12,279 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:26:12,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-23 17:26:12,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:12,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 1303 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:26:12,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:16,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4412 backedges. 1724 proven. 0 refuted. 0 times theorem prover too weak. 2688 trivial. 0 not checked. [2021-11-23 17:26:16,034 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:26:16,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136213147] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:26:16,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:26:16,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5, 6, 6] total 18 [2021-11-23 17:26:16,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259437777] [2021-11-23 17:26:16,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:16,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:26:16,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:16,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:26:16,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:26:16,038 INFO L87 Difference]: Start difference. First operand 5599 states and 5875 transitions. Second operand has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 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 17:26:18,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:18,094 INFO L93 Difference]: Finished difference Result 10073 states and 10618 transitions. [2021-11-23 17:26:18,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:26:18,095 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 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 1184 [2021-11-23 17:26:18,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:18,129 INFO L225 Difference]: With dead ends: 10073 [2021-11-23 17:26:18,129 INFO L226 Difference]: Without dead ends: 5599 [2021-11-23 17:26:18,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 5915 GetRequests, 5897 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:26:18,134 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 36 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:18,134 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [36 Valid, 17 Invalid, 637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 629 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 17:26:18,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5599 states. [2021-11-23 17:26:18,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5599 to 5599. [2021-11-23 17:26:18,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 1.0475169703465523) internal successors, (5864), 5598 states have internal predecessors, (5864), 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 17:26:18,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 5864 transitions. [2021-11-23 17:26:18,237 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 5864 transitions. Word has length 1184 [2021-11-23 17:26:18,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:18,238 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 5864 transitions. [2021-11-23 17:26:18,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 89.0) internal successors, (356), 3 states have internal predecessors, (356), 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 17:26:18,239 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 5864 transitions. [2021-11-23 17:26:18,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1199 [2021-11-23 17:26:18,259 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:18,262 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 5, 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, 2, 2, 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] [2021-11-23 17:26:18,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (33)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:18,476 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (32)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:18,691 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-11-23 17:26:18,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:26:18,865 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:18,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:18,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2081192414, now seen corresponding path program 1 times [2021-11-23 17:26:18,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:18,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [580156875] [2021-11-23 17:26:18,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:18,870 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:18,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:18,871 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:18,872 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Waiting until timeout for monitored process [2021-11-23 17:26:19,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:19,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 17:26:19,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:23,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1041 proven. 2960 refuted. 0 times theorem prover too weak. 485 trivial. 0 not checked. [2021-11-23 17:26:23,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:33,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2990 proven. 438 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2021-11-23 17:26:33,313 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:26:33,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [580156875] [2021-11-23 17:26:33,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [580156875] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:26:33,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2039318886] [2021-11-23 17:26:33,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:33,314 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:33,314 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:26:33,315 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:26:33,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Waiting until timeout for monitored process [2021-11-23 17:26:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 1315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:26:33,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:38,343 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 2450 proven. 82 refuted. 0 times theorem prover too weak. 1954 trivial. 0 not checked. [2021-11-23 17:26:38,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:26:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4486 backedges. 1832 proven. 0 refuted. 0 times theorem prover too weak. 2654 trivial. 0 not checked. [2021-11-23 17:26:41,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2039318886] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:26:41,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:26:41,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 5, 7] total 16 [2021-11-23 17:26:41,717 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606494519] [2021-11-23 17:26:41,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:26:41,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:26:41,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:26:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:26:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:26:41,719 INFO L87 Difference]: Start difference. First operand 5599 states and 5864 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:26:43,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:26:43,908 INFO L93 Difference]: Finished difference Result 10763 states and 11335 transitions. [2021-11-23 17:26:43,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:26:43,908 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 1198 [2021-11-23 17:26:43,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:26:43,919 INFO L225 Difference]: With dead ends: 10763 [2021-11-23 17:26:43,919 INFO L226 Difference]: Without dead ends: 6311 [2021-11-23 17:26:43,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4788 GetRequests, 4774 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:26:43,925 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 78 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 430 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:26:43,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 36 Invalid, 430 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 17:26:43,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-11-23 17:26:44,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5599. [2021-11-23 17:26:44,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 1.0384065737763486) internal successors, (5813), 5598 states have internal predecessors, (5813), 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 17:26:44,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 5813 transitions. [2021-11-23 17:26:44,022 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 5813 transitions. Word has length 1198 [2021-11-23 17:26:44,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:26:44,023 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 5813 transitions. [2021-11-23 17:26:44,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:26:44,024 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 5813 transitions. [2021-11-23 17:26:44,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1208 [2021-11-23 17:26:44,070 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:26:44,071 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-11-23 17:26:44,089 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (35)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:44,290 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (36)] Forceful destruction successful, exit code 0 [2021-11-23 17:26:44,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:26:44,489 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:26:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:26:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash 2061792844, now seen corresponding path program 1 times [2021-11-23 17:26:44,494 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:26:44,494 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015909310] [2021-11-23 17:26:44,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:26:44,495 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:26:44,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:26:44,502 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:26:44,520 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Waiting until timeout for monitored process [2021-11-23 17:26:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:26:44,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:26:44,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:26:53,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1727 proven. 2295 refuted. 0 times theorem prover too weak. 491 trivial. 0 not checked. [2021-11-23 17:26:53,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:09,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 3320 proven. 129 refuted. 0 times theorem prover too weak. 1064 trivial. 0 not checked. [2021-11-23 17:27:09,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:09,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015909310] [2021-11-23 17:27:09,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015909310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:09,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1576638739] [2021-11-23 17:27:09,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:09,644 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:09,644 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:09,645 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:09,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Waiting until timeout for monitored process [2021-11-23 17:27:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:10,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 1326 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 17:27:10,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:17,884 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 2441 proven. 108 refuted. 0 times theorem prover too weak. 1964 trivial. 0 not checked. [2021-11-23 17:27:17,884 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:20,986 INFO L134 CoverageAnalysis]: Checked inductivity of 4513 backedges. 1841 proven. 0 refuted. 0 times theorem prover too weak. 2672 trivial. 0 not checked. [2021-11-23 17:27:20,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1576638739] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:27:20,987 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 17:27:20,988 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [13, 12, 9] total 31 [2021-11-23 17:27:20,988 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025213613] [2021-11-23 17:27:20,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:27:20,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:27:20,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:27:20,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:27:20,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:27:20,990 INFO L87 Difference]: Start difference. First operand 5599 states and 5813 transitions. Second operand has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:27:22,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:27:22,647 INFO L93 Difference]: Finished difference Result 10407 states and 10845 transitions. [2021-11-23 17:27:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:27:22,653 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 1207 [2021-11-23 17:27:22,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:27:22,657 INFO L225 Difference]: With dead ends: 10407 [2021-11-23 17:27:22,658 INFO L226 Difference]: Without dead ends: 5955 [2021-11-23 17:27:22,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4824 GetRequests, 4795 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=216, Invalid=714, Unknown=0, NotChecked=0, Total=930 [2021-11-23 17:27:22,662 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 76 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:27:22,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [76 Valid, 15 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:27:22,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5955 states. [2021-11-23 17:27:22,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5955 to 5599. [2021-11-23 17:27:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5599 states, 5598 states have (on average 1.0366202215076814) internal successors, (5803), 5598 states have internal predecessors, (5803), 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 17:27:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5599 states to 5599 states and 5803 transitions. [2021-11-23 17:27:22,753 INFO L78 Accepts]: Start accepts. Automaton has 5599 states and 5803 transitions. Word has length 1207 [2021-11-23 17:27:22,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:27:22,754 INFO L470 AbstractCegarLoop]: Abstraction has 5599 states and 5803 transitions. [2021-11-23 17:27:22,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.0) internal successors, (441), 3 states have internal predecessors, (441), 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 17:27:22,755 INFO L276 IsEmpty]: Start isEmpty. Operand 5599 states and 5803 transitions. [2021-11-23 17:27:22,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1296 [2021-11-23 17:27:22,772 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:27:22,773 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 9, 9, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 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, 2, 2, 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] [2021-11-23 17:27:22,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (38)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:22,986 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (37)] Forceful destruction successful, exit code 0 [2021-11-23 17:27:23,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:27:23,176 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:27:23,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:27:23,177 INFO L85 PathProgramCache]: Analyzing trace with hash 1818085183, now seen corresponding path program 1 times [2021-11-23 17:27:23,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:27:23,182 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1599576310] [2021-11-23 17:27:23,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:23,182 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:27:23,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:27:23,183 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:27:23,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (39)] Waiting until timeout for monitored process [2021-11-23 17:27:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:23,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 17:27:23,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:27:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 2367 proven. 2295 refuted. 0 times theorem prover too weak. 660 trivial. 0 not checked. [2021-11-23 17:27:31,208 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:27:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 3960 proven. 129 refuted. 0 times theorem prover too weak. 1233 trivial. 0 not checked. [2021-11-23 17:27:46,994 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:27:46,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1599576310] [2021-11-23 17:27:46,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1599576310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:27:46,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [652641383] [2021-11-23 17:27:46,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:27:46,995 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:27:46,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:27:46,996 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:27:46,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (40)] Waiting until timeout for monitored process [2021-11-23 17:27:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:27:47,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 17:27:47,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:14,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 2959 proven. 789 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2021-11-23 17:28:14,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:23,086 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 3069 proven. 679 refuted. 0 times theorem prover too weak. 1574 trivial. 0 not checked. [2021-11-23 17:28:23,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [652641383] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:23,087 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758292298] [2021-11-23 17:28:23,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:28:23,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:28:23,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:28:23,088 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:28:23,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22ffcd09-135b-49d2-9986-1983d7292f43/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-23 17:28:23,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:28:23,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 1422 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 17:28:23,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:28:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 3607 proven. 123 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2021-11-23 17:28:46,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:28:49,331 INFO L134 CoverageAnalysis]: Checked inductivity of 5322 backedges. 3607 proven. 123 refuted. 0 times theorem prover too weak. 1592 trivial. 0 not checked. [2021-11-23 17:28:49,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758292298] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:28:49,331 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:28:49,333 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 8, 9, 4, 4] total 35 [2021-11-23 17:28:49,333 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234099739] [2021-11-23 17:28:49,334 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:28:49,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 17:28:49,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:28:49,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 17:28:49,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=903, Unknown=0, NotChecked=0, Total=1190 [2021-11-23 17:28:49,339 INFO L87 Difference]: Start difference. First operand 5599 states and 5803 transitions. Second operand has 35 states, 35 states have (on average 67.05714285714286) internal successors, (2347), 35 states have internal predecessors, (2347), 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)