./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem11_label09.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_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/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_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/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_a3823490-7f00-45f7-bc91-610b9d704a8f/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 d8f5e7588b052ea6944040fff8b4327aaa68f0ec95b59b9f16a8a13412f9772d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:59:50,209 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:59:50,211 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:59:50,245 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:59:50,245 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:59:50,247 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:59:50,248 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:59:50,251 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:59:50,253 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:59:50,254 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:59:50,255 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:59:50,257 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:59:50,257 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:59:50,259 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:59:50,260 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:59:50,262 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:59:50,263 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:59:50,264 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:59:50,266 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:59:50,269 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:59:50,271 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:59:50,273 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:59:50,274 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:59:50,275 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:59:50,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:59:50,280 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:59:50,280 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:59:50,281 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:59:50,282 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:59:50,283 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:59:50,283 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:59:50,284 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:59:50,285 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:59:50,286 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:59:50,288 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:59:50,288 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:59:50,289 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:59:50,290 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:59:50,290 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:59:50,291 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:59:50,292 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:59:50,293 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:59:50,319 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:59:50,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:59:50,323 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:59:50,323 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:59:50,324 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:59:50,325 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:59:50,325 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:59:50,325 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:59:50,325 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:59:50,326 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:59:50,327 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:59:50,327 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:59:50,327 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:59:50,327 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:59:50,328 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:59:50,328 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:59:50,328 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:59:50,328 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:59:50,329 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:59:50,329 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:59:50,329 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:59:50,330 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:59:50,330 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:59:50,330 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:59:50,330 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:59:50,331 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:59:50,332 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:59:50,332 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:59:50,333 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:59:50,333 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:59:50,333 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:59:50,334 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:59:50,334 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:50,334 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:59:50,334 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:59:50,335 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:59:50,335 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:59:50,335 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:59:50,335 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:59:50,335 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:59:50,336 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:59:50,336 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_a3823490-7f00-45f7-bc91-610b9d704a8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8f5e7588b052ea6944040fff8b4327aaa68f0ec95b59b9f16a8a13412f9772d [2021-11-23 16:59:50,638 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:59:50,659 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:59:50,662 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:59:50,663 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:59:50,664 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:59:50,665 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label09.c [2021-11-23 16:59:50,733 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/af5d6add9/48c7d97358ac465c8d22ef0408cab4e3/FLAGe0f749772 [2021-11-23 16:59:51,329 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:59:51,330 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c [2021-11-23 16:59:51,349 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/af5d6add9/48c7d97358ac465c8d22ef0408cab4e3/FLAGe0f749772 [2021-11-23 16:59:51,545 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/af5d6add9/48c7d97358ac465c8d22ef0408cab4e3 [2021-11-23 16:59:51,548 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:59:51,549 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:59:51,551 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:51,551 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:59:51,555 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:59:51,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:51" (1/1) ... [2021-11-23 16:59:51,557 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79e25a2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:51, skipping insertion in model container [2021-11-23 16:59:51,557 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:51" (1/1) ... [2021-11-23 16:59:51,564 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:59:51,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:59:51,926 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_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c[9501,9514] [2021-11-23 16:59:52,178 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:52,195 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:59:52,240 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_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c[9501,9514] [2021-11-23 16:59:52,369 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:52,385 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:59:52,386 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52 WrapperNode [2021-11-23 16:59:52,386 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:52,387 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:52,387 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:59:52,387 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:59:52,395 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,427 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,587 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 999 [2021-11-23 16:59:52,587 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:52,588 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:59:52,588 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:59:52,589 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:59:52,597 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,598 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,626 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,627 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,685 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,694 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,713 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:59:52,714 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:59:52,714 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:59:52,714 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:59:52,716 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:52" (1/1) ... [2021-11-23 16:59:52,723 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:52,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:52,747 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:59:52,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:59:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:59:52,786 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:59:52,787 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:59:52,787 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:59:52,851 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:59:52,853 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:59:54,326 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:59:54,372 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 16:59:54,378 INFO L158 Benchmark]: Toolchain (without parser) took 2826.06ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 75.5MB in the beginning and 83.1MB in the end (delta: -7.6MB). Peak memory consumption was 57.9MB. Max. memory is 16.1GB. [2021-11-23 16:59:54,378 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:59:54,380 INFO L158 Benchmark]: CACSL2BoogieTranslator took 835.34ms. Allocated memory is still 121.6MB. Free memory was 75.2MB in the beginning and 59.8MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 16:59:54,382 INFO L158 Benchmark]: Boogie Procedure Inliner took 200.57ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 59.8MB in the beginning and 138.1MB in the end (delta: -78.3MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. [2021-11-23 16:59:54,383 INFO L158 Benchmark]: Boogie Preprocessor took 124.87ms. Allocated memory is still 174.1MB. Free memory was 138.1MB in the beginning and 129.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 16:59:54,383 INFO L158 Benchmark]: RCFGBuilder took 1660.71ms. Allocated memory is still 174.1MB. Free memory was 129.4MB in the beginning and 83.1MB in the end (delta: 46.3MB). Peak memory consumption was 60.8MB. Max. memory is 16.1GB. [2021-11-23 16:59:54,391 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 121.6MB. Free memory is still 95.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 835.34ms. Allocated memory is still 121.6MB. Free memory was 75.2MB in the beginning and 59.8MB in the end (delta: 15.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 200.57ms. Allocated memory was 121.6MB in the beginning and 174.1MB in the end (delta: 52.4MB). Free memory was 59.8MB in the beginning and 138.1MB in the end (delta: -78.3MB). Peak memory consumption was 34.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 124.87ms. Allocated memory is still 174.1MB. Free memory was 138.1MB in the beginning and 129.4MB in the end (delta: 8.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * RCFGBuilder took 1660.71ms. Allocated memory is still 174.1MB. Free memory was 129.4MB in the beginning and 83.1MB in the end (delta: 46.3MB). Peak memory consumption was 60.8MB. 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 16:59:54,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/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_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/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_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem11_label09.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/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_a3823490-7f00-45f7-bc91-610b9d704a8f/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 d8f5e7588b052ea6944040fff8b4327aaa68f0ec95b59b9f16a8a13412f9772d --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:59:56,720 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:59:56,723 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:59:56,753 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:59:56,753 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:59:56,755 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:59:56,757 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:59:56,759 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:59:56,761 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:59:56,763 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:59:56,764 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:59:56,765 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:59:56,766 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:59:56,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:59:56,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:59:56,770 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:59:56,771 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:59:56,772 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:59:56,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:59:56,777 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:59:56,779 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:59:56,780 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:59:56,782 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:59:56,782 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:59:56,786 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:59:56,787 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:59:56,787 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:59:56,788 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:59:56,789 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:59:56,790 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:59:56,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:59:56,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:59:56,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:59:56,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:59:56,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:59:56,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:59:56,796 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:59:56,796 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:59:56,797 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:59:56,798 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:59:56,799 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:59:56,800 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:59:56,829 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:59:56,829 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:59:56,829 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:59:56,829 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:59:56,830 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:59:56,830 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:59:56,831 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:59:56,831 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:59:56,831 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:59:56,831 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:59:56,831 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:59:56,831 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:59:56,832 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:59:56,832 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:59:56,833 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:59:56,833 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:59:56,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:59:56,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:59:56,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:59:56,834 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:59:56,835 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:59:56,835 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:59:56,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:59:56,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:59:56,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:56,836 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:59:56,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:59:56,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:59:56,836 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:59:56,836 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:59:56,837 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:59:56,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:59:56,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:59:56,837 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_a3823490-7f00-45f7-bc91-610b9d704a8f/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d8f5e7588b052ea6944040fff8b4327aaa68f0ec95b59b9f16a8a13412f9772d [2021-11-23 16:59:57,182 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:59:57,204 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:59:57,206 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:59:57,207 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:59:57,208 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:59:57,209 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem11_label09.c [2021-11-23 16:59:57,283 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/4e4b6e563/f1af0ba824084eef9c2e6bc5a5629f87/FLAG0462fe3ae [2021-11-23 16:59:58,054 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:59:58,057 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c [2021-11-23 16:59:58,079 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/4e4b6e563/f1af0ba824084eef9c2e6bc5a5629f87/FLAG0462fe3ae [2021-11-23 16:59:58,241 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/data/4e4b6e563/f1af0ba824084eef9c2e6bc5a5629f87 [2021-11-23 16:59:58,244 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:59:58,248 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:59:58,250 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:58,251 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:59:58,254 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:59:58,255 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:58" (1/1) ... [2021-11-23 16:59:58,257 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c36de93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:58, skipping insertion in model container [2021-11-23 16:59:58,257 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:59:58" (1/1) ... [2021-11-23 16:59:58,264 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:59:58,316 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:59:58,617 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c[9501,9514] [2021-11-23 16:59:58,912 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:58,924 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:59:58,969 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_a3823490-7f00-45f7-bc91-610b9d704a8f/sv-benchmarks/c/eca-rers2012/Problem11_label09.c[9501,9514] [2021-11-23 16:59:59,135 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:59:59,155 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:59:59,155 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59 WrapperNode [2021-11-23 16:59:59,155 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:59:59,157 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:59,157 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:59:59,157 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:59:59,164 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,190 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,275 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 997 [2021-11-23 16:59:59,275 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:59:59,276 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:59:59,276 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:59:59,276 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:59:59,285 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,285 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,292 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,292 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,337 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,366 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,378 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,390 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:59:59,390 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:59:59,391 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:59:59,391 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:59:59,391 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (1/1) ... [2021-11-23 16:59:59,403 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:59:59,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:59:59,425 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:59:59,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:59:59,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:59:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:59:59,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:59:59,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:59:59,577 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:59:59,579 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:00:07,688 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:00:07,699 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:00:07,700 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:00:07,702 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:07 BoogieIcfgContainer [2021-11-23 17:00:07,703 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:00:07,705 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:00:07,705 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:00:07,708 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:00:07,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:59:58" (1/3) ... [2021-11-23 17:00:07,709 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1709c45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:07, skipping insertion in model container [2021-11-23 17:00:07,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:59:59" (2/3) ... [2021-11-23 17:00:07,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1709c45c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:00:07, skipping insertion in model container [2021-11-23 17:00:07,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:00:07" (3/3) ... [2021-11-23 17:00:07,712 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem11_label09.c [2021-11-23 17:00:07,718 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:00:07,719 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:00:07,773 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:00:07,781 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 17:00:07,781 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:00:07,806 INFO L276 IsEmpty]: Start isEmpty. Operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 17:00:07,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 17:00:07,816 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:07,817 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:07,818 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:07,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:07,824 INFO L85 PathProgramCache]: Analyzing trace with hash -215114758, now seen corresponding path program 1 times [2021-11-23 17:00:07,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:07,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1880366608] [2021-11-23 17:00:07,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:07,844 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:07,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:07,848 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:07,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:00:07,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:07,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:07,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:08,358 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 17:00:08,358 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:08,359 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:08,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1880366608] [2021-11-23 17:00:08,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1880366608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:08,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:08,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:08,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535285822] [2021-11-23 17:00:08,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:08,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:08,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:08,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:08,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:08,406 INFO L87 Difference]: Start difference. First operand has 283 states, 281 states have (on average 1.7153024911032029) internal successors, (482), 282 states have internal predecessors, (482), 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 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 17:00:17,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:17,475 INFO L93 Difference]: Finished difference Result 758 states and 1342 transitions. [2021-11-23 17:00:17,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:17,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 66 [2021-11-23 17:00:17,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:17,512 INFO L225 Difference]: With dead ends: 758 [2021-11-23 17:00:17,521 INFO L226 Difference]: Without dead ends: 410 [2021-11-23 17:00:17,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 64 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 17:00:17,532 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 159 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 618 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 618 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:17,533 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 220 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 618 Invalid, 0 Unknown, 0 Unchecked, 9.0s Time] [2021-11-23 17:00:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-11-23 17:00:17,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 410. [2021-11-23 17:00:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 409 states have (on average 1.4572127139364304) internal successors, (596), 409 states have internal predecessors, (596), 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 17:00:17,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 596 transitions. [2021-11-23 17:00:17,613 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 596 transitions. Word has length 66 [2021-11-23 17:00:17,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:17,614 INFO L470 AbstractCegarLoop]: Abstraction has 410 states and 596 transitions. [2021-11-23 17:00:17,614 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 2 states have internal predecessors, (66), 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 17:00:17,614 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 596 transitions. [2021-11-23 17:00:17,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-23 17:00:17,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:17,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:00:17,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:17,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:17,829 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:17,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:17,829 INFO L85 PathProgramCache]: Analyzing trace with hash 75298066, now seen corresponding path program 1 times [2021-11-23 17:00:17,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:17,831 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1949020431] [2021-11-23 17:00:17,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:17,831 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:17,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:17,851 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:17,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:00:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:18,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:18,499 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:18,499 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:18,500 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:18,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1949020431] [2021-11-23 17:00:18,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1949020431] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:18,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:18,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:18,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914718839] [2021-11-23 17:00:18,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:18,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:18,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:18,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:18,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:18,504 INFO L87 Difference]: Start difference. First operand 410 states and 596 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 17:00:29,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:29,223 INFO L93 Difference]: Finished difference Result 1202 states and 1754 transitions. [2021-11-23 17:00:29,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:29,230 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 134 [2021-11-23 17:00:29,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:29,236 INFO L225 Difference]: With dead ends: 1202 [2021-11-23 17:00:29,237 INFO L226 Difference]: Without dead ends: 794 [2021-11-23 17:00:29,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 132 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 17:00:29,240 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 132 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:29,241 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 187 Invalid, 675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 10.7s Time] [2021-11-23 17:00:29,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-11-23 17:00:29,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 782. [2021-11-23 17:00:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 781 states have (on average 1.3469910371318823) internal successors, (1052), 781 states have internal predecessors, (1052), 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 17:00:29,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 1052 transitions. [2021-11-23 17:00:29,288 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 1052 transitions. Word has length 134 [2021-11-23 17:00:29,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:29,289 INFO L470 AbstractCegarLoop]: Abstraction has 782 states and 1052 transitions. [2021-11-23 17:00:29,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 2 states have internal predecessors, (134), 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 17:00:29,289 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 1052 transitions. [2021-11-23 17:00:29,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-23 17:00:29,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:29,299 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:29,315 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:29,513 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:29,513 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:29,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:29,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1527046270, now seen corresponding path program 1 times [2021-11-23 17:00:29,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:29,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [755004430] [2021-11-23 17:00:29,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:29,516 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:29,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:29,518 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:29,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:00:29,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:29,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:30,213 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:30,213 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:30,213 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:30,213 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [755004430] [2021-11-23 17:00:30,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [755004430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:30,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:30,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:00:30,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276511725] [2021-11-23 17:00:30,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:30,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:30,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:30,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:30,217 INFO L87 Difference]: Start difference. First operand 782 states and 1052 transitions. Second operand has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 17:00:38,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:38,379 INFO L93 Difference]: Finished difference Result 1931 states and 2544 transitions. [2021-11-23 17:00:38,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:38,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 142 [2021-11-23 17:00:38,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:38,409 INFO L225 Difference]: With dead ends: 1931 [2021-11-23 17:00:38,409 INFO L226 Difference]: Without dead ends: 1151 [2021-11-23 17:00:38,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 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 17:00:38,412 INFO L933 BasicCegarLoop]: 168 mSDtfsCounter, 112 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:38,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 194 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2021-11-23 17:00:38,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-11-23 17:00:38,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1150. [2021-11-23 17:00:38,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1150 states, 1149 states have (on average 1.2567449956483898) internal successors, (1444), 1149 states have internal predecessors, (1444), 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 17:00:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1444 transitions. [2021-11-23 17:00:38,451 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1444 transitions. Word has length 142 [2021-11-23 17:00:38,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:38,451 INFO L470 AbstractCegarLoop]: Abstraction has 1150 states and 1444 transitions. [2021-11-23 17:00:38,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.333333333333336) internal successors, (142), 2 states have internal predecessors, (142), 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 17:00:38,452 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1444 transitions. [2021-11-23 17:00:38,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2021-11-23 17:00:38,456 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:38,457 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:00:38,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:38,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:38,669 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:38,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:38,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1612095663, now seen corresponding path program 1 times [2021-11-23 17:00:38,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:38,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2089068993] [2021-11-23 17:00:38,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:38,677 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:38,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:38,678 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:38,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:00:38,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:38,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:38,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:39,344 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 63 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:39,344 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:39,345 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:39,345 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2089068993] [2021-11-23 17:00:39,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2089068993] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:39,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:39,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:39,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185497207] [2021-11-23 17:00:39,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:39,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:39,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:39,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:39,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:39,348 INFO L87 Difference]: Start difference. First operand 1150 states and 1444 transitions. Second operand has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 17:00:48,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:48,709 INFO L93 Difference]: Finished difference Result 1948 states and 2632 transitions. [2021-11-23 17:00:48,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:48,717 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 193 [2021-11-23 17:00:48,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:48,727 INFO L225 Difference]: With dead ends: 1948 [2021-11-23 17:00:48,728 INFO L226 Difference]: Without dead ends: 1542 [2021-11-23 17:00:48,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 191 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 17:00:48,730 INFO L933 BasicCegarLoop]: 290 mSDtfsCounter, 169 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:48,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 322 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2021-11-23 17:00:48,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1542 states. [2021-11-23 17:00:48,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1542 to 1539. [2021-11-23 17:00:48,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1539 states, 1538 states have (on average 1.2711313394018204) internal successors, (1955), 1538 states have internal predecessors, (1955), 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 17:00:48,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1539 states to 1539 states and 1955 transitions. [2021-11-23 17:00:48,774 INFO L78 Accepts]: Start accepts. Automaton has 1539 states and 1955 transitions. Word has length 193 [2021-11-23 17:00:48,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:48,776 INFO L470 AbstractCegarLoop]: Abstraction has 1539 states and 1955 transitions. [2021-11-23 17:00:48,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 64.33333333333333) internal successors, (193), 3 states have internal predecessors, (193), 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 17:00:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 1539 states and 1955 transitions. [2021-11-23 17:00:48,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-23 17:00:48,780 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:48,781 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:48,796 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:48,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:48,993 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:48,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:48,994 INFO L85 PathProgramCache]: Analyzing trace with hash -410493458, now seen corresponding path program 1 times [2021-11-23 17:00:48,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:48,997 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346163073] [2021-11-23 17:00:48,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:48,997 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:48,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:48,998 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:49,003 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:00:49,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:49,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:00:49,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:00:49,782 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 194 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:00:49,782 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:00:49,782 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:00:49,782 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346163073] [2021-11-23 17:00:49,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [346163073] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:00:49,783 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:00:49,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:00:49,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307336605] [2021-11-23 17:00:49,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:00:49,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:00:49,785 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:00:49,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:00:49,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:00:49,786 INFO L87 Difference]: Start difference. First operand 1539 states and 1955 transitions. Second operand has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 17:00:58,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:00:58,439 INFO L93 Difference]: Finished difference Result 3279 states and 4345 transitions. [2021-11-23 17:00:58,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:00:58,446 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 246 [2021-11-23 17:00:58,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:00:58,460 INFO L225 Difference]: With dead ends: 3279 [2021-11-23 17:00:58,460 INFO L226 Difference]: Without dead ends: 2110 [2021-11-23 17:00:58,462 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 244 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 17:00:58,464 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 136 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:00:58,464 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 340 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2021-11-23 17:00:58,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2110 states. [2021-11-23 17:00:58,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2110 to 2097. [2021-11-23 17:00:58,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2097 states, 2096 states have (on average 1.2533396946564885) internal successors, (2627), 2096 states have internal predecessors, (2627), 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 17:00:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2097 states to 2097 states and 2627 transitions. [2021-11-23 17:00:58,539 INFO L78 Accepts]: Start accepts. Automaton has 2097 states and 2627 transitions. Word has length 246 [2021-11-23 17:00:58,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:00:58,539 INFO L470 AbstractCegarLoop]: Abstraction has 2097 states and 2627 transitions. [2021-11-23 17:00:58,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.0) internal successors, (246), 3 states have internal predecessors, (246), 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 17:00:58,540 INFO L276 IsEmpty]: Start isEmpty. Operand 2097 states and 2627 transitions. [2021-11-23 17:00:58,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-23 17:00:58,545 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:00:58,545 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:00:58,559 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:00:58,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:00:58,760 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:00:58,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:00:58,761 INFO L85 PathProgramCache]: Analyzing trace with hash -744050184, now seen corresponding path program 1 times [2021-11-23 17:00:58,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:00:58,762 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1180316388] [2021-11-23 17:00:58,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:00:58,762 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:00:58,762 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:00:58,764 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:00:58,769 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:00:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:00:58,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:00:58,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:01,257 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 127 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:01,258 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:01:05,496 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 195 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:05,496 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:01:05,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1180316388] [2021-11-23 17:01:05,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1180316388] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:01:05,496 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:01:05,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:01:05,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064433071] [2021-11-23 17:01:05,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:01:05,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:01:05,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:01:05,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:01:05,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:05,499 INFO L87 Difference]: Start difference. First operand 2097 states and 2627 transitions. Second operand has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:24,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:01:24,324 INFO L93 Difference]: Finished difference Result 4188 states and 5463 transitions. [2021-11-23 17:01:24,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:01:24,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-23 17:01:24,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:01:24,355 INFO L225 Difference]: With dead ends: 4188 [2021-11-23 17:01:24,355 INFO L226 Difference]: Without dead ends: 3019 [2021-11-23 17:01:24,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 492 GetRequests, 489 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:01:24,363 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 150 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 18.8s IncrementalHoareTripleChecker+Time [2021-11-23 17:01:24,363 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [150 Valid, 49 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 18.8s Time] [2021-11-23 17:01:24,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3019 states. [2021-11-23 17:01:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3019 to 3019. [2021-11-23 17:01:24,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3019 states, 3018 states have (on average 1.269715043074884) internal successors, (3832), 3018 states have internal predecessors, (3832), 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 17:01:24,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3019 states to 3019 states and 3832 transitions. [2021-11-23 17:01:24,443 INFO L78 Accepts]: Start accepts. Automaton has 3019 states and 3832 transitions. Word has length 247 [2021-11-23 17:01:24,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:01:24,444 INFO L470 AbstractCegarLoop]: Abstraction has 3019 states and 3832 transitions. [2021-11-23 17:01:24,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 82.33333333333333) internal successors, (247), 3 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:01:24,444 INFO L276 IsEmpty]: Start isEmpty. Operand 3019 states and 3832 transitions. [2021-11-23 17:01:24,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-23 17:01:24,450 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:01:24,450 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:01:24,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:01:24,665 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,665 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:01:24,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:01:24,666 INFO L85 PathProgramCache]: Analyzing trace with hash 2042101008, now seen corresponding path program 1 times [2021-11-23 17:01:24,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:01:24,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [105391855] [2021-11-23 17:01:24,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:01:24,669 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:01:24,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:01:24,670 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:01:24,697 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:01:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:01:24,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:01:24,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:01:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 106 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:01:29,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:02:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 185 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:11,880 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [105391855] [2021-11-23 17:02:11,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [105391855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:02:11,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2014476169] [2021-11-23 17:02:11,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:11,880 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:02:11,880 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:02:11,882 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:02:11,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Waiting until timeout for monitored process [2021-11-23 17:02:12,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:02:12,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:13,296 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2021-11-23 17:02:13,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:13,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2014476169] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:13,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:02:13,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 12 [2021-11-23 17:02:13,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673143207] [2021-11-23 17:02:13,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:13,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:02:13,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:02:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-11-23 17:02:13,299 INFO L87 Difference]: Start difference. First operand 3019 states and 3832 transitions. Second operand has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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 17:02:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:02:54,770 INFO L93 Difference]: Finished difference Result 7700 states and 9991 transitions. [2021-11-23 17:02:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:02:54,771 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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 258 [2021-11-23 17:02:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:02:54,799 INFO L225 Difference]: With dead ends: 7700 [2021-11-23 17:02:54,800 INFO L226 Difference]: Without dead ends: 5051 [2021-11-23 17:02:54,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 773 GetRequests, 762 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:02:54,805 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 734 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1624 mSolverCounterSat, 347 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 734 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 347 IncrementalHoareTripleChecker+Valid, 1624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:02:54,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [734 Valid, 97 Invalid, 1971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [347 Valid, 1624 Invalid, 0 Unknown, 0 Unchecked, 41.2s Time] [2021-11-23 17:02:54,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5051 states. [2021-11-23 17:02:54,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5051 to 3939. [2021-11-23 17:02:54,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3938 states have (on average 1.292026409344845) internal successors, (5088), 3938 states have internal predecessors, (5088), 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 17:02:54,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 5088 transitions. [2021-11-23 17:02:54,933 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 5088 transitions. Word has length 258 [2021-11-23 17:02:54,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:02:54,934 INFO L470 AbstractCegarLoop]: Abstraction has 3939 states and 5088 transitions. [2021-11-23 17:02:54,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 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 17:02:54,934 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 5088 transitions. [2021-11-23 17:02:54,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-23 17:02:54,940 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:02:54,941 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:02:54,948 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:55,163 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:02:55,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:02:55,344 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:02:55,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:02:55,344 INFO L85 PathProgramCache]: Analyzing trace with hash -808187339, now seen corresponding path program 1 times [2021-11-23 17:02:55,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:02:55,346 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629968453] [2021-11-23 17:02:55,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:02:55,347 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:02:55,347 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:02:55,349 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:02:55,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:02:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:02:55,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:02:55,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:02:56,103 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:02:56,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:02:56,104 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:02:56,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629968453] [2021-11-23 17:02:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629968453] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:02:56,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:02:56,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:02:56,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120939012] [2021-11-23 17:02:56,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:02:56,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:02:56,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:02:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:02:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:02:56,107 INFO L87 Difference]: Start difference. First operand 3939 states and 5088 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 17:03:05,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:05,528 INFO L93 Difference]: Finished difference Result 8796 states and 11562 transitions. [2021-11-23 17:03:05,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 269 [2021-11-23 17:03:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:05,563 INFO L225 Difference]: With dead ends: 8796 [2021-11-23 17:03:05,563 INFO L226 Difference]: Without dead ends: 5042 [2021-11-23 17:03:05,568 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 267 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 17:03:05,569 INFO L933 BasicCegarLoop]: 329 mSDtfsCounter, 144 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:05,569 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 349 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2021-11-23 17:03:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5042 states. [2021-11-23 17:03:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5042 to 3918. [2021-11-23 17:03:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 1.290783763083993) internal successors, (5056), 3917 states have internal predecessors, (5056), 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 17:03:05,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 5056 transitions. [2021-11-23 17:03:05,677 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 5056 transitions. Word has length 269 [2021-11-23 17:03:05,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:05,677 INFO L470 AbstractCegarLoop]: Abstraction has 3918 states and 5056 transitions. [2021-11-23 17:03:05,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 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 17:03:05,678 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 5056 transitions. [2021-11-23 17:03:05,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 286 [2021-11-23 17:03:05,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:05,685 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:03:05,701 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:05,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:05,898 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:05,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:05,898 INFO L85 PathProgramCache]: Analyzing trace with hash -394370667, now seen corresponding path program 1 times [2021-11-23 17:03:05,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:05,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1504662850] [2021-11-23 17:03:05,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:05,900 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:05,900 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:05,901 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:05,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:03:06,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:06,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:03:06,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:06,861 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 127 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:06,861 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:03:07,617 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 202 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:07,617 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:03:07,618 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1504662850] [2021-11-23 17:03:07,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1504662850] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:03:07,618 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:03:07,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:03:07,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237724694] [2021-11-23 17:03:07,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:03:07,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:03:07,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:03:07,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:03:07,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:03:07,621 INFO L87 Difference]: Start difference. First operand 3918 states and 5056 transitions. Second operand has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 17:03:20,725 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:03:30,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:03:30,987 INFO L93 Difference]: Finished difference Result 9674 states and 12641 transitions. [2021-11-23 17:03:30,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:03:30,988 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 285 [2021-11-23 17:03:30,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:03:31,016 INFO L225 Difference]: With dead ends: 9674 [2021-11-23 17:03:31,016 INFO L226 Difference]: Without dead ends: 6126 [2021-11-23 17:03:31,021 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 568 GetRequests, 565 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 17:03:31,022 INFO L933 BasicCegarLoop]: 300 mSDtfsCounter, 133 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 151 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 21.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 23.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:03:31,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 325 Invalid, 652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 500 Invalid, 1 Unknown, 0 Unchecked, 23.3s Time] [2021-11-23 17:03:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6126 states. [2021-11-23 17:03:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6126 to 6126. [2021-11-23 17:03:31,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6126 states, 6125 states have (on average 1.2339591836734694) internal successors, (7558), 6125 states have internal predecessors, (7558), 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 17:03:31,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6126 states to 6126 states and 7558 transitions. [2021-11-23 17:03:31,183 INFO L78 Accepts]: Start accepts. Automaton has 6126 states and 7558 transitions. Word has length 285 [2021-11-23 17:03:31,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:03:31,184 INFO L470 AbstractCegarLoop]: Abstraction has 6126 states and 7558 transitions. [2021-11-23 17:03:31,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 95.0) internal successors, (285), 3 states have internal predecessors, (285), 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 17:03:31,185 INFO L276 IsEmpty]: Start isEmpty. Operand 6126 states and 7558 transitions. [2021-11-23 17:03:31,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 329 [2021-11-23 17:03:31,211 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:03:31,211 INFO L514 BasicCegarLoop]: trace histogram [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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:03:31,227 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:03:31,424 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:03:31,424 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:03:31,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:03:31,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1507358903, now seen corresponding path program 1 times [2021-11-23 17:03:31,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:03:31,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142077669] [2021-11-23 17:03:31,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:03:31,427 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:03:31,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:03:31,428 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:03:31,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:03:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:03:31,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:03:31,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:03:36,203 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 102 proven. 149 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:03:36,203 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:04:28,463 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 115 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:04:28,463 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:04:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142077669] [2021-11-23 17:04:28,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142077669] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:04:28,464 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1970289203] [2021-11-23 17:04:28,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:04:28,464 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:04:28,464 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:04:28,466 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:04:28,466 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-11-23 17:04:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:04:28,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 384 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:04:28,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:04:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 127 proven. 0 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2021-11-23 17:04:30,743 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:04:30,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1970289203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:04:30,744 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:04:30,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 13 [2021-11-23 17:04:30,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125295304] [2021-11-23 17:04:30,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:04:30,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:04:30,745 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:04:30,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:04:30,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-11-23 17:04:30,746 INFO L87 Difference]: Start difference. First operand 6126 states and 7558 transitions. Second operand has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 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 17:05:06,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:06,445 INFO L93 Difference]: Finished difference Result 14342 states and 17870 transitions. [2021-11-23 17:05:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 17:05:06,453 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 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 328 [2021-11-23 17:05:06,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:06,481 INFO L225 Difference]: With dead ends: 14342 [2021-11-23 17:05:06,481 INFO L226 Difference]: Without dead ends: 8402 [2021-11-23 17:05:06,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 983 GetRequests, 971 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-11-23 17:05:06,488 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 647 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 1170 mSolverCounterSat, 322 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 1492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 322 IncrementalHoareTripleChecker+Valid, 1170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:06,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 69 Invalid, 1492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [322 Valid, 1170 Invalid, 0 Unknown, 0 Unchecked, 35.5s Time] [2021-11-23 17:05:06,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-11-23 17:05:06,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6677. [2021-11-23 17:05:06,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6677 states, 6676 states have (on average 1.1989215098861594) internal successors, (8004), 6676 states have internal predecessors, (8004), 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 17:05:06,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6677 states to 6677 states and 8004 transitions. [2021-11-23 17:05:06,663 INFO L78 Accepts]: Start accepts. Automaton has 6677 states and 8004 transitions. Word has length 328 [2021-11-23 17:05:06,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:06,664 INFO L470 AbstractCegarLoop]: Abstraction has 6677 states and 8004 transitions. [2021-11-23 17:05:06,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 29.285714285714285) internal successors, (205), 7 states have internal predecessors, (205), 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 17:05:06,664 INFO L276 IsEmpty]: Start isEmpty. Operand 6677 states and 8004 transitions. [2021-11-23 17:05:06,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-23 17:05:06,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:06,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-23 17:05:06,734 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:06,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:07,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:07,126 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:07,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:07,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1689021976, now seen corresponding path program 1 times [2021-11-23 17:05:07,129 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:07,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [956883071] [2021-11-23 17:05:07,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:07,129 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:07,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:07,130 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:07,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:05:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:07,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:05:07,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:11,044 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:05:11,045 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:16,348 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 79 proven. 297 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:05:16,348 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:16,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [956883071] [2021-11-23 17:05:16,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [956883071] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:16,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [517567539] [2021-11-23 17:05:16,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:16,349 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:05:16,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:05:16,351 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:05:16,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 17:05:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:16,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:05:16,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:18,590 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 312 proven. 32 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:05:18,591 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:20,555 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 331 proven. 13 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2021-11-23 17:05:20,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [517567539] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:05:20,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441258629] [2021-11-23 17:05:20,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:20,556 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:05:20,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:05:20,580 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:05:20,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 17:05:20,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:20,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:05:20,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:21,787 INFO L134 CoverageAnalysis]: Checked inductivity of 440 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2021-11-23 17:05:21,787 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:05:21,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441258629] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:05:21,787 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 17:05:21,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5, 8, 8] total 18 [2021-11-23 17:05:21,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927265519] [2021-11-23 17:05:21,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:21,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:21,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:21,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:21,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:05:21,790 INFO L87 Difference]: Start difference. First operand 6677 states and 8004 transitions. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 17:05:27,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:05:27,889 INFO L93 Difference]: Finished difference Result 11138 states and 13533 transitions. [2021-11-23 17:05:27,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:05:27,890 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 352 [2021-11-23 17:05:27,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:05:27,902 INFO L225 Difference]: With dead ends: 11138 [2021-11-23 17:05:27,903 INFO L226 Difference]: Without dead ends: 6492 [2021-11-23 17:05:27,908 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1755 GetRequests, 1739 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-11-23 17:05:27,909 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 125 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:05:27,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 150 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2021-11-23 17:05:27,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6492 states. [2021-11-23 17:05:28,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6492 to 6491. [2021-11-23 17:05:28,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6491 states, 6490 states have (on average 1.1268104776579353) internal successors, (7313), 6490 states have internal predecessors, (7313), 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 17:05:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6491 states to 6491 states and 7313 transitions. [2021-11-23 17:05:28,042 INFO L78 Accepts]: Start accepts. Automaton has 6491 states and 7313 transitions. Word has length 352 [2021-11-23 17:05:28,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:05:28,043 INFO L470 AbstractCegarLoop]: Abstraction has 6491 states and 7313 transitions. [2021-11-23 17:05:28,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 2 states have internal predecessors, (181), 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 17:05:28,044 INFO L276 IsEmpty]: Start isEmpty. Operand 6491 states and 7313 transitions. [2021-11-23 17:05:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 374 [2021-11-23 17:05:28,056 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:05:28,056 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 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] [2021-11-23 17:05:28,061 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-11-23 17:05:28,292 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:05:28,476 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 17:05:28,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:05:28,659 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:05:28,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:05:28,659 INFO L85 PathProgramCache]: Analyzing trace with hash 113173328, now seen corresponding path program 1 times [2021-11-23 17:05:28,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:05:28,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1430045647] [2021-11-23 17:05:28,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:05:28,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:05:28,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:05:28,681 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:05:28,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:05:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:05:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 442 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:05:28,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:05:29,858 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 280 proven. 102 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:05:29,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:05:30,896 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 382 proven. 0 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-23 17:05:30,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:05:30,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1430045647] [2021-11-23 17:05:30,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1430045647] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 17:05:30,897 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 17:05:30,897 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 17:05:30,897 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818044523] [2021-11-23 17:05:30,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:05:30,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:05:30,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:05:30,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:05:30,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:05:30,898 INFO L87 Difference]: Start difference. First operand 6491 states and 7313 transitions. Second operand has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 17:06:06,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:06:06,392 INFO L93 Difference]: Finished difference Result 15007 states and 16935 transitions. [2021-11-23 17:06:06,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:06:06,401 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 373 [2021-11-23 17:06:06,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:06:06,415 INFO L225 Difference]: With dead ends: 15007 [2021-11-23 17:06:06,415 INFO L226 Difference]: Without dead ends: 8886 [2021-11-23 17:06:06,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 741 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 17:06:06,420 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 131 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 35.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:06:06,421 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 75 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 35.4s Time] [2021-11-23 17:06:06,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8886 states. [2021-11-23 17:06:06,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8886 to 8331. [2021-11-23 17:06:06,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8331 states, 8330 states have (on average 1.1153661464585833) internal successors, (9291), 8330 states have internal predecessors, (9291), 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 17:06:06,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8331 states to 8331 states and 9291 transitions. [2021-11-23 17:06:06,572 INFO L78 Accepts]: Start accepts. Automaton has 8331 states and 9291 transitions. Word has length 373 [2021-11-23 17:06:06,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:06:06,573 INFO L470 AbstractCegarLoop]: Abstraction has 8331 states and 9291 transitions. [2021-11-23 17:06:06,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 103.33333333333333) internal successors, (310), 3 states have internal predecessors, (310), 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 17:06:06,573 INFO L276 IsEmpty]: Start isEmpty. Operand 8331 states and 9291 transitions. [2021-11-23 17:06:06,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 383 [2021-11-23 17:06:06,584 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:06:06,584 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:06:06,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 17:06:06,798 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:06:06,801 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:06:06,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:06:06,802 INFO L85 PathProgramCache]: Analyzing trace with hash 36831663, now seen corresponding path program 1 times [2021-11-23 17:06:06,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:06:06,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1462911954] [2021-11-23 17:06:06,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:06,804 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:06:06,804 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:06:06,805 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:06:06,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 17:06:06,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:07,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:06:07,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 191 proven. 264 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:08,148 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 378 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:06:39,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:06:39,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1462911954] [2021-11-23 17:06:39,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1462911954] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:39,460 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2049611103] [2021-11-23 17:06:39,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:39,460 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:06:39,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:06:39,462 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:06:39,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 17:06:40,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:40,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:06:40,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:41,533 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:06:41,533 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:06:54,395 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:06:54,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [2049611103] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:06:54,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1608002993] [2021-11-23 17:06:54,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:06:54,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 17:06:54,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:06:54,398 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 17:06:54,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_a3823490-7f00-45f7-bc91-610b9d704a8f/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-23 17:06:54,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:06:54,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 452 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 17:06:54,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:06:55,956 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 0 proven. 344 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:06:55,956 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:07:20,883 INFO L134 CoverageAnalysis]: Checked inductivity of 455 backedges. 191 proven. 153 refuted. 0 times theorem prover too weak. 111 trivial. 0 not checked. [2021-11-23 17:07:20,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1608002993] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:07:20,883 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 17:07:20,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 15 [2021-11-23 17:07:20,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964258146] [2021-11-23 17:07:20,884 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 17:07:20,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 17:07:20,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:07:20,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 17:07:20,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:07:20,889 INFO L87 Difference]: Start difference. First operand 8331 states and 9291 transitions. Second operand has 15 states, 15 states have (on average 96.53333333333333) internal successors, (1448), 15 states have internal predecessors, (1448), 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 17:08:19,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:24,770 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:26,660 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.89s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:29,107 WARN L534 Checker$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 17:08:36,272 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.22s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:47,264 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:08:59,517 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:12,622 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:14,295 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:39,709 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:43,910 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.35s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:45,784 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:09:47,518 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:15,878 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.42s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:18,020 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:21,954 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:37,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.08s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:42,253 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:47,923 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:10:54,125 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.47s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:02,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.77s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:13,156 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:20,694 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.96s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:21,881 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:23,062 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:48,922 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:51,594 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:11:57,821 WARN L534 Checker$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 17:12:01,232 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.06s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:04,449 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:06,691 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.08s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:07,804 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.11s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:08,925 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:15,086 WARN L534 Checker$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 17:12:17,618 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:20,214 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:33,777 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.23s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:37,760 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.17s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:39,941 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.01s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:46,191 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:51,277 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.12s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:12:56,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:02,690 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.85s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:16,073 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:18,155 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:27,971 WARN L534 Checker$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 17:13:30,104 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:32,107 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:34,115 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.46s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:44,080 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:13:46,439 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []