./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.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_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/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_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/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_4e8b5830-b99e-4000-8c5f-3574cdfde399/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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:37:52,183 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:37:52,185 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:37:52,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:37:52,254 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:37:52,259 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:37:52,261 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:37:52,264 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:37:52,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:37:52,269 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:37:52,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:37:52,272 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:37:52,273 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:37:52,275 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:37:52,277 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:37:52,279 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:37:52,280 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:37:52,282 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:37:52,285 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:37:52,288 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:37:52,291 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:37:52,293 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:37:52,295 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:37:52,297 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:37:52,302 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:37:52,303 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:37:52,303 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:37:52,305 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:37:52,306 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:37:52,307 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:37:52,308 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:37:52,309 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:37:52,311 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:37:52,312 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:37:52,314 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:37:52,315 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:37:52,316 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:37:52,316 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:37:52,317 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:37:52,318 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:37:52,319 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:37:52,321 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:37:52,353 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:37:52,354 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:37:52,354 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:37:52,355 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:37:52,356 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:37:52,356 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:37:52,356 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:37:52,357 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:37:52,357 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:37:52,357 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:37:52,357 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:37:52,358 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:37:52,358 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:37:52,358 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:37:52,359 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:37:52,359 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:37:52,359 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:37:52,359 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:37:52,360 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:37:52,361 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:37:52,361 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:37:52,361 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:37:52,362 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:37:52,362 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:37:52,362 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:37:52,363 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:37:52,363 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:37:52,363 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:37:52,364 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:37:52,364 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:37:52,364 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:37:52,365 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:37:52,365 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:52,365 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:37:52,365 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:37:52,366 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:37:52,366 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:37:52,366 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:37:52,367 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:37:52,367 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:37:52,367 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:37:52,367 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2021-11-23 17:37:52,665 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:37:52,695 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:37:52,698 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:37:52,700 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:37:52,700 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:37:52,702 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-23 17:37:52,807 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/51d436b30/547d50b4e120461aaf1e40e33a206db6/FLAG41c1d762c [2021-11-23 17:37:53,557 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:37:53,558 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-23 17:37:53,588 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/51d436b30/547d50b4e120461aaf1e40e33a206db6/FLAG41c1d762c [2021-11-23 17:37:53,744 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/51d436b30/547d50b4e120461aaf1e40e33a206db6 [2021-11-23 17:37:53,748 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:37:53,753 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:37:53,755 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:53,756 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:37:53,760 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:37:53,762 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:53" (1/1) ... [2021-11-23 17:37:53,764 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f019a7f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:53, skipping insertion in model container [2021-11-23 17:37:53,765 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:37:53" (1/1) ... [2021-11-23 17:37:53,773 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:37:53,959 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:37:54,652 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-23 17:37:54,699 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:54,712 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:37:55,193 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-23 17:37:55,208 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:37:55,237 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:37:55,238 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55 WrapperNode [2021-11-23 17:37:55,238 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:37:55,240 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:55,240 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:37:55,240 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:37:55,249 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,443 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1771 [2021-11-23 17:37:55,444 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:37:55,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:37:55,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:37:55,446 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:37:55,456 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,457 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,470 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,471 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,546 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,575 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,596 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,612 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:37:55,613 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:37:55,614 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:37:55,614 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:37:55,615 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:37:55" (1/1) ... [2021-11-23 17:37:55,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:37:55,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:37:55,650 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:37:55,668 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:37:55,709 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:37:55,709 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:37:55,710 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:37:55,710 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:37:55,840 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:37:55,843 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:37:57,678 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:37:57,751 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 17:37:57,765 INFO L158 Benchmark]: Toolchain (without parser) took 4009.22ms. Allocated memory was 115.3MB in the beginning and 239.1MB in the end (delta: 123.7MB). Free memory was 74.6MB in the beginning and 170.0MB in the end (delta: -95.5MB). Peak memory consumption was 71.8MB. Max. memory is 16.1GB. [2021-11-23 17:37:57,766 INFO L158 Benchmark]: CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:37:57,768 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1483.45ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 74.3MB in the beginning and 115.6MB in the end (delta: -41.2MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. [2021-11-23 17:37:57,770 INFO L158 Benchmark]: Boogie Procedure Inliner took 204.31ms. Allocated memory is still 167.8MB. Free memory was 115.6MB in the beginning and 100.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2021-11-23 17:37:57,771 INFO L158 Benchmark]: Boogie Preprocessor took 167.52ms. Allocated memory is still 167.8MB. Free memory was 100.9MB in the beginning and 90.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 17:37:57,773 INFO L158 Benchmark]: RCFGBuilder took 2147.70ms. Allocated memory was 167.8MB in the beginning and 239.1MB in the end (delta: 71.3MB). Free memory was 90.4MB in the beginning and 170.0MB in the end (delta: -79.6MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. [2021-11-23 17:37:57,784 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.38ms. Allocated memory is still 115.3MB. Free memory is still 63.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1483.45ms. Allocated memory was 115.3MB in the beginning and 167.8MB in the end (delta: 52.4MB). Free memory was 74.3MB in the beginning and 115.6MB in the end (delta: -41.2MB). Peak memory consumption was 32.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 204.31ms. Allocated memory is still 167.8MB. Free memory was 115.6MB in the beginning and 100.9MB in the end (delta: 14.7MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 167.52ms. Allocated memory is still 167.8MB. Free memory was 100.9MB in the beginning and 90.4MB in the end (delta: 10.5MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * RCFGBuilder took 2147.70ms. Allocated memory was 167.8MB in the beginning and 239.1MB in the end (delta: 71.3MB). Free memory was 90.4MB in the beginning and 170.0MB in the end (delta: -79.6MB). Peak memory consumption was 35.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 17:37:57,842 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/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_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/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_4e8b5830-b99e-4000-8c5f-3574cdfde399/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 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:38:00,516 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:38:00,520 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:38:00,579 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:38:00,580 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:38:00,582 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:38:00,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:38:00,587 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:38:00,590 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:38:00,592 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:38:00,593 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:38:00,595 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:38:00,596 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:38:00,597 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:38:00,600 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:38:00,602 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:38:00,603 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:38:00,605 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:38:00,607 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:38:00,610 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:38:00,613 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:38:00,615 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:38:00,617 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:38:00,618 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:38:00,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:38:00,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:38:00,624 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:38:00,625 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:38:00,633 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:38:00,634 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:38:00,635 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:38:00,636 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:38:00,637 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:38:00,639 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:38:00,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:38:00,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:38:00,645 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:38:00,646 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:38:00,647 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:38:00,648 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:38:00,650 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:38:00,653 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:38:00,707 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:38:00,707 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:38:00,708 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:38:00,709 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:38:00,710 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:38:00,710 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:38:00,710 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:38:00,711 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:38:00,711 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:38:00,711 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:38:00,713 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:38:00,713 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:38:00,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:38:00,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:38:00,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:38:00,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:38:00,716 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:38:00,716 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:38:00,717 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:38:00,717 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:38:00,717 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:38:00,717 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:38:00,718 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:38:00,718 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:38:00,718 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:38:00,719 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:38:00,719 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:38:00,719 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:38:00,719 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:38:00,720 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:00,720 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:38:00,720 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:38:00,721 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:38:00,721 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:38:00,721 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:38:00,722 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:38:00,722 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:38:00,723 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:38:00,723 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6036572cc480aba1617ffcf5de0f96e18071f7d06d6847cfbda5ebab0921c496 [2021-11-23 17:38:01,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:38:01,266 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:38:01,269 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:38:01,271 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:38:01,272 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:38:01,274 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-23 17:38:01,370 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/6207bc913/5ffd999cfe804086818b1c5dbb01392f/FLAGa3c016198 [2021-11-23 17:38:02,301 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:38:02,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c [2021-11-23 17:38:02,327 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/6207bc913/5ffd999cfe804086818b1c5dbb01392f/FLAGa3c016198 [2021-11-23 17:38:02,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/data/6207bc913/5ffd999cfe804086818b1c5dbb01392f [2021-11-23 17:38:02,429 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:38:02,432 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:38:02,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:02,436 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:38:02,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:38:02,442 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:02" (1/1) ... [2021-11-23 17:38:02,444 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2fd0f74c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:02, skipping insertion in model container [2021-11-23 17:38:02,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:38:02" (1/1) ... [2021-11-23 17:38:02,452 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:38:02,551 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:38:03,358 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-23 17:38:03,392 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:03,413 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:38:03,730 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_4e8b5830-b99e-4000-8c5f-3574cdfde399/sv-benchmarks/c/eca-rers2012/Problem03_label25.c[58529,58542] [2021-11-23 17:38:03,747 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:38:03,774 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:38:03,774 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03 WrapperNode [2021-11-23 17:38:03,775 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:38:03,776 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:03,776 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:38:03,776 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:38:03,786 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:03,851 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,025 INFO L137 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 1769 [2021-11-23 17:38:04,025 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:38:04,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:38:04,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:38:04,028 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:38:04,038 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,051 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,051 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,135 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,165 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:38:04,222 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:38:04,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:38:04,223 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:38:04,229 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (1/1) ... [2021-11-23 17:38:04,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:38:04,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:38:04,264 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:38:04,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:38:04,349 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:38:04,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:38:04,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:38:04,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:38:04,525 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:38:04,536 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:38:07,387 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:38:07,400 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:38:07,400 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:38:07,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:38:07 BoogieIcfgContainer [2021-11-23 17:38:07,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:38:07,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:38:07,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:38:07,411 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:38:07,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:38:02" (1/3) ... [2021-11-23 17:38:07,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd78489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:38:07, skipping insertion in model container [2021-11-23 17:38:07,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:38:03" (2/3) ... [2021-11-23 17:38:07,413 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6dd78489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:38:07, skipping insertion in model container [2021-11-23 17:38:07,413 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:38:07" (3/3) ... [2021-11-23 17:38:07,415 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem03_label25.c [2021-11-23 17:38:07,422 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:38:07,422 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:38:07,507 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:38:07,518 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 17:38:07,519 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:38:07,566 INFO L276 IsEmpty]: Start isEmpty. Operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 17:38:07,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-23 17:38:07,594 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:07,595 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:38:07,596 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:07,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash 724714706, now seen corresponding path program 1 times [2021-11-23 17:38:07,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:07,630 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152737636] [2021-11-23 17:38:07,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:07,631 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:07,632 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:07,636 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:07,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:38:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:07,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-23 17:38:07,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:32,468 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 17:38:32,469 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:38:32,470 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:32,470 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152737636] [2021-11-23 17:38:32,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152737636] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:38:32,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:38:32,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-11-23 17:38:32,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253090776] [2021-11-23 17:38:32,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:38:32,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 17:38:32,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 17:38:32,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 17:38:32,537 INFO L87 Difference]: Start difference. First operand has 302 states, 300 states have (on average 1.73) internal successors, (519), 301 states have internal predecessors, (519), 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 10 states, 10 states have (on average 18.0) internal successors, (180), 9 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 17:38:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:42,226 INFO L93 Difference]: Finished difference Result 1133 states and 2085 transitions. [2021-11-23 17:38:42,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:38:42,228 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 18.0) internal successors, (180), 9 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 180 [2021-11-23 17:38:42,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:42,252 INFO L225 Difference]: With dead ends: 1133 [2021-11-23 17:38:42,252 INFO L226 Difference]: Without dead ends: 761 [2021-11-23 17:38:42,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-11-23 17:38:42,262 INFO L933 BasicCegarLoop]: 260 mSDtfsCounter, 1633 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 4261 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1633 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 4261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:42,263 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1633 Valid, 451 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 4261 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2021-11-23 17:38:42,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761 states. [2021-11-23 17:38:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761 to 758. [2021-11-23 17:38:42,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 758 states, 757 states have (on average 1.272126816380449) internal successors, (963), 757 states have internal predecessors, (963), 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 17:38:42,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 758 states to 758 states and 963 transitions. [2021-11-23 17:38:42,371 INFO L78 Accepts]: Start accepts. Automaton has 758 states and 963 transitions. Word has length 180 [2021-11-23 17:38:42,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:42,373 INFO L470 AbstractCegarLoop]: Abstraction has 758 states and 963 transitions. [2021-11-23 17:38:42,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 18.0) internal successors, (180), 9 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 17:38:42,374 INFO L276 IsEmpty]: Start isEmpty. Operand 758 states and 963 transitions. [2021-11-23 17:38:42,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-11-23 17:38:42,379 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:42,379 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:38:42,397 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-11-23 17:38:42,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:42,594 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:42,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:42,595 INFO L85 PathProgramCache]: Analyzing trace with hash -617534467, now seen corresponding path program 1 times [2021-11-23 17:38:42,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:42,600 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [901606879] [2021-11-23 17:38:42,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:42,601 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:42,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:42,604 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:42,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:38:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-23 17:38:42,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:07,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:07,973 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:07,973 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:07,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [901606879] [2021-11-23 17:39:07,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [901606879] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:07,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:07,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 17:39:07,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505172799] [2021-11-23 17:39:07,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:07,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-23 17:39:07,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:07,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-23 17:39:07,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:39:07,978 INFO L87 Difference]: Start difference. First operand 758 states and 963 transitions. Second operand has 11 states, 11 states have (on average 17.0) internal successors, (187), 10 states have internal predecessors, (187), 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 17:39:16,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:16,200 INFO L93 Difference]: Finished difference Result 1545 states and 2322 transitions. [2021-11-23 17:39:16,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 17:39:16,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 17.0) internal successors, (187), 10 states have internal predecessors, (187), 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 187 [2021-11-23 17:39:16,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:16,212 INFO L225 Difference]: With dead ends: 1545 [2021-11-23 17:39:16,213 INFO L226 Difference]: Without dead ends: 1308 [2021-11-23 17:39:16,215 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-11-23 17:39:16,217 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 1481 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 4727 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1481 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 4727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:16,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1481 Valid, 353 Invalid, 4975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 4727 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2021-11-23 17:39:16,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1308 states. [2021-11-23 17:39:16,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1308 to 899. [2021-11-23 17:39:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 1.2371937639198218) internal successors, (1111), 898 states have internal predecessors, (1111), 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 17:39:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 1111 transitions. [2021-11-23 17:39:16,270 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 1111 transitions. Word has length 187 [2021-11-23 17:39:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 899 states and 1111 transitions. [2021-11-23 17:39:16,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.0) internal successors, (187), 10 states have internal predecessors, (187), 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 17:39:16,272 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 1111 transitions. [2021-11-23 17:39:16,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2021-11-23 17:39:16,276 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:16,276 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:16,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:16,492 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:16,493 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:16,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:16,494 INFO L85 PathProgramCache]: Analyzing trace with hash -649632484, now seen corresponding path program 1 times [2021-11-23 17:39:16,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:16,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1658722473] [2021-11-23 17:39:16,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:16,503 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:16,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:16,520 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:16,553 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:39:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:16,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:39:16,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:39:18,643 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:18,643 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:18,643 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1658722473] [2021-11-23 17:39:18,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1658722473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:18,643 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:18,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:39:18,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237906719] [2021-11-23 17:39:18,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:18,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:39:18,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:18,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:39:18,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:39:18,646 INFO L87 Difference]: Start difference. First operand 899 states and 1111 transitions. Second operand has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 17:39:22,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:22,008 INFO L93 Difference]: Finished difference Result 2519 states and 3488 transitions. [2021-11-23 17:39:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 17:39:22,009 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 195 [2021-11-23 17:39:22,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:22,024 INFO L225 Difference]: With dead ends: 2519 [2021-11-23 17:39:22,024 INFO L226 Difference]: Without dead ends: 2079 [2021-11-23 17:39:22,028 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 191 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:39:22,033 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 1093 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 1461 mSolverCounterSat, 557 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1093 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 557 IncrementalHoareTripleChecker+Valid, 1461 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:22,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1093 Valid, 93 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [557 Valid, 1461 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2021-11-23 17:39:22,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2079 states. [2021-11-23 17:39:22,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2079 to 1518. [2021-11-23 17:39:22,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1518 states, 1517 states have (on average 1.2821357943309162) internal successors, (1945), 1517 states have internal predecessors, (1945), 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 17:39:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1518 states to 1518 states and 1945 transitions. [2021-11-23 17:39:22,093 INFO L78 Accepts]: Start accepts. Automaton has 1518 states and 1945 transitions. Word has length 195 [2021-11-23 17:39:22,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:22,095 INFO L470 AbstractCegarLoop]: Abstraction has 1518 states and 1945 transitions. [2021-11-23 17:39:22,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.0) internal successors, (190), 4 states have internal predecessors, (190), 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 17:39:22,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1518 states and 1945 transitions. [2021-11-23 17:39:22,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-23 17:39:22,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:22,102 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:22,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:22,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:22,316 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:22,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:22,316 INFO L85 PathProgramCache]: Analyzing trace with hash 458532214, now seen corresponding path program 1 times [2021-11-23 17:39:22,323 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [741250435] [2021-11-23 17:39:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:22,324 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:22,324 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:22,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:22,359 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:39:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:22,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:39:22,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:39:22,982 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:22,982 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:22,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [741250435] [2021-11-23 17:39:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [741250435] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:22,985 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:22,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:22,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138269122] [2021-11-23 17:39:22,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:22,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:22,989 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:22,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:22,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:22,991 INFO L87 Difference]: Start difference. First operand 1518 states and 1945 transitions. Second operand has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 17:39:24,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:24,757 INFO L93 Difference]: Finished difference Result 2784 states and 3871 transitions. [2021-11-23 17:39:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:24,758 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 205 [2021-11-23 17:39:24,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:24,771 INFO L225 Difference]: With dead ends: 2784 [2021-11-23 17:39:24,771 INFO L226 Difference]: Without dead ends: 2131 [2021-11-23 17:39:24,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 203 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 17:39:24,774 INFO L933 BasicCegarLoop]: 373 mSDtfsCounter, 229 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 397 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:24,774 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 397 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2021-11-23 17:39:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2131 states. [2021-11-23 17:39:24,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2131 to 2131. [2021-11-23 17:39:24,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 1.2661971830985916) internal successors, (2697), 2130 states have internal predecessors, (2697), 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 17:39:24,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 2697 transitions. [2021-11-23 17:39:24,838 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 2697 transitions. Word has length 205 [2021-11-23 17:39:24,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:24,839 INFO L470 AbstractCegarLoop]: Abstraction has 2131 states and 2697 transitions. [2021-11-23 17:39:24,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 17:39:24,839 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 2697 transitions. [2021-11-23 17:39:24,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2021-11-23 17:39:24,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:24,846 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:24,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:25,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:25,053 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:25,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:25,054 INFO L85 PathProgramCache]: Analyzing trace with hash -644640847, now seen corresponding path program 1 times [2021-11-23 17:39:25,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:25,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [26442933] [2021-11-23 17:39:25,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:25,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:25,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:25,058 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:25,064 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:39:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:25,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:39:25,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 40 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:39:25,628 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:25,628 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:25,628 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [26442933] [2021-11-23 17:39:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [26442933] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:25,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:25,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:25,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494730955] [2021-11-23 17:39:25,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:25,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:39:25,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:25,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:39:25,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:39:25,631 INFO L87 Difference]: Start difference. First operand 2131 states and 2697 transitions. Second operand has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 17:39:27,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:27,995 INFO L93 Difference]: Finished difference Result 5902 states and 7886 transitions. [2021-11-23 17:39:27,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:39:27,996 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 207 [2021-11-23 17:39:27,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:28,022 INFO L225 Difference]: With dead ends: 5902 [2021-11-23 17:39:28,022 INFO L226 Difference]: Without dead ends: 4636 [2021-11-23 17:39:28,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:39:28,026 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 608 mSDsluCounter, 330 mSDsCounter, 0 mSdLazyCounter, 1100 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 608 SdHoareTripleChecker+Valid, 435 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 1100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:28,026 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [608 Valid, 435 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 1100 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:39:28,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-11-23 17:39:28,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 4631. [2021-11-23 17:39:28,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4631 states, 4630 states have (on average 1.3047516198704103) internal successors, (6041), 4630 states have internal predecessors, (6041), 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 17:39:28,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4631 states to 4631 states and 6041 transitions. [2021-11-23 17:39:28,173 INFO L78 Accepts]: Start accepts. Automaton has 4631 states and 6041 transitions. Word has length 207 [2021-11-23 17:39:28,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:28,174 INFO L470 AbstractCegarLoop]: Abstraction has 4631 states and 6041 transitions. [2021-11-23 17:39:28,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 50.5) internal successors, (202), 3 states have internal predecessors, (202), 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 17:39:28,175 INFO L276 IsEmpty]: Start isEmpty. Operand 4631 states and 6041 transitions. [2021-11-23 17:39:28,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-23 17:39:28,183 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:28,183 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:28,197 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:28,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:28,398 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:28,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:28,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1177719096, now seen corresponding path program 1 times [2021-11-23 17:39:28,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:28,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [987762342] [2021-11-23 17:39:28,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:28,402 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:28,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:28,403 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:28,440 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:39:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:28,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:39:28,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:28,979 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 27 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:28,979 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:28,979 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:28,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [987762342] [2021-11-23 17:39:28,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [987762342] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:28,979 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:28,980 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:39:28,980 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318567064] [2021-11-23 17:39:28,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:28,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:28,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:28,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:28,982 INFO L87 Difference]: Start difference. First operand 4631 states and 6041 transitions. Second operand has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 17:39:30,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:30,387 INFO L93 Difference]: Finished difference Result 10837 states and 14632 transitions. [2021-11-23 17:39:30,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:30,388 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 208 [2021-11-23 17:39:30,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:30,429 INFO L225 Difference]: With dead ends: 10837 [2021-11-23 17:39:30,429 INFO L226 Difference]: Without dead ends: 6461 [2021-11-23 17:39:30,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 206 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 17:39:30,438 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 187 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 710 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:30,438 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 213 Invalid, 710 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:39:30,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6461 states. [2021-11-23 17:39:30,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6461 to 5849. [2021-11-23 17:39:30,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5849 states, 5848 states have (on average 1.2597469220246238) internal successors, (7367), 5848 states have internal predecessors, (7367), 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 17:39:30,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5849 states to 5849 states and 7367 transitions. [2021-11-23 17:39:30,588 INFO L78 Accepts]: Start accepts. Automaton has 5849 states and 7367 transitions. Word has length 208 [2021-11-23 17:39:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:30,589 INFO L470 AbstractCegarLoop]: Abstraction has 5849 states and 7367 transitions. [2021-11-23 17:39:30,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 69.33333333333333) internal successors, (208), 2 states have internal predecessors, (208), 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 17:39:30,589 INFO L276 IsEmpty]: Start isEmpty. Operand 5849 states and 7367 transitions. [2021-11-23 17:39:30,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-23 17:39:30,600 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:30,600 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:30,614 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-11-23 17:39:30,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:30,814 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:30,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:30,814 INFO L85 PathProgramCache]: Analyzing trace with hash -305278334, now seen corresponding path program 1 times [2021-11-23 17:39:30,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:30,816 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [627539793] [2021-11-23 17:39:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:30,816 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:30,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:30,817 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:30,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 17:39:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:30,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:30,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 43 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 17:39:31,304 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:31,304 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:31,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [627539793] [2021-11-23 17:39:31,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [627539793] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:31,305 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:31,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:31,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889923731] [2021-11-23 17:39:31,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:31,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:31,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:31,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:31,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:31,306 INFO L87 Difference]: Start difference. First operand 5849 states and 7367 transitions. Second operand has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 17:39:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:32,679 INFO L93 Difference]: Finished difference Result 13890 states and 17952 transitions. [2021-11-23 17:39:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-23 17:39:32,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:32,719 INFO L225 Difference]: With dead ends: 13890 [2021-11-23 17:39:32,719 INFO L226 Difference]: Without dead ends: 8296 [2021-11-23 17:39:32,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 209 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 17:39:32,729 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 237 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:32,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 322 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:39:32,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8296 states. [2021-11-23 17:39:32,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8296 to 8290. [2021-11-23 17:39:32,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8290 states, 8289 states have (on average 1.1953190975992278) internal successors, (9908), 8289 states have internal predecessors, (9908), 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 17:39:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8290 states to 8290 states and 9908 transitions. [2021-11-23 17:39:32,950 INFO L78 Accepts]: Start accepts. Automaton has 8290 states and 9908 transitions. Word has length 211 [2021-11-23 17:39:32,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:32,953 INFO L470 AbstractCegarLoop]: Abstraction has 8290 states and 9908 transitions. [2021-11-23 17:39:32,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 65.66666666666667) internal successors, (197), 3 states have internal predecessors, (197), 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 17:39:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 8290 states and 9908 transitions. [2021-11-23 17:39:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2021-11-23 17:39:32,964 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:32,964 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, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:32,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:33,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:33,178 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:33,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:33,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1195366370, now seen corresponding path program 1 times [2021-11-23 17:39:33,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:33,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1473100088] [2021-11-23 17:39:33,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:33,184 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:33,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:33,185 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:33,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:39:33,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:33,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:33,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 89 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:33,865 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:33,865 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:33,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1473100088] [2021-11-23 17:39:33,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1473100088] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:33,866 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:33,866 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:33,866 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282086062] [2021-11-23 17:39:33,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:33,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:33,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:33,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:33,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:33,868 INFO L87 Difference]: Start difference. First operand 8290 states and 9908 transitions. Second operand has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 17:39:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:35,313 INFO L93 Difference]: Finished difference Result 21824 states and 26452 transitions. [2021-11-23 17:39:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 241 [2021-11-23 17:39:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:35,357 INFO L225 Difference]: With dead ends: 21824 [2021-11-23 17:39:35,357 INFO L226 Difference]: Without dead ends: 13789 [2021-11-23 17:39:35,369 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 239 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 17:39:35,370 INFO L933 BasicCegarLoop]: 272 mSDtfsCounter, 234 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:35,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 297 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:39:35,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13789 states. [2021-11-23 17:39:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13789 to 11347. [2021-11-23 17:39:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11347 states, 11346 states have (on average 1.186585580821435) internal successors, (13463), 11346 states have internal predecessors, (13463), 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 17:39:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11347 states to 11347 states and 13463 transitions. [2021-11-23 17:39:35,680 INFO L78 Accepts]: Start accepts. Automaton has 11347 states and 13463 transitions. Word has length 241 [2021-11-23 17:39:35,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:35,681 INFO L470 AbstractCegarLoop]: Abstraction has 11347 states and 13463 transitions. [2021-11-23 17:39:35,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 80.33333333333333) internal successors, (241), 3 states have internal predecessors, (241), 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 17:39:35,682 INFO L276 IsEmpty]: Start isEmpty. Operand 11347 states and 13463 transitions. [2021-11-23 17:39:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2021-11-23 17:39:35,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:35,697 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:35,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:35,915 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:35,916 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:35,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:35,916 INFO L85 PathProgramCache]: Analyzing trace with hash -473802642, now seen corresponding path program 1 times [2021-11-23 17:39:35,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:35,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [196051238] [2021-11-23 17:39:35,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:35,920 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:35,920 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:35,921 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:35,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:39:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:36,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:39:36,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:36,529 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 130 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 17:39:36,530 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:36,530 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:36,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [196051238] [2021-11-23 17:39:36,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [196051238] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:36,531 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:36,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:36,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48682677] [2021-11-23 17:39:36,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:36,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:36,532 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:36,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:36,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:36,533 INFO L87 Difference]: Start difference. First operand 11347 states and 13463 transitions. Second operand has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 17:39:38,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:38,031 INFO L93 Difference]: Finished difference Result 31194 states and 37285 transitions. [2021-11-23 17:39:38,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:38,032 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 17:39:38,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:38,078 INFO L225 Difference]: With dead ends: 31194 [2021-11-23 17:39:38,079 INFO L226 Difference]: Without dead ends: 20102 [2021-11-23 17:39:38,092 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 17:39:38,095 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 221 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:38,096 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 310 Invalid, 726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:39:38,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20102 states. [2021-11-23 17:39:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20102 to 20084. [2021-11-23 17:39:38,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20084 states, 20083 states have (on average 1.1732310909724644) internal successors, (23562), 20083 states have internal predecessors, (23562), 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 17:39:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20084 states to 20084 states and 23562 transitions. [2021-11-23 17:39:38,537 INFO L78 Accepts]: Start accepts. Automaton has 20084 states and 23562 transitions. Word has length 269 [2021-11-23 17:39:38,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:38,538 INFO L470 AbstractCegarLoop]: Abstraction has 20084 states and 23562 transitions. [2021-11-23 17:39:38,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 75.33333333333333) internal successors, (226), 3 states have internal predecessors, (226), 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 17:39:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 20084 states and 23562 transitions. [2021-11-23 17:39:38,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2021-11-23 17:39:38,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:38,561 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:38,579 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:38,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:38,776 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:38,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:38,777 INFO L85 PathProgramCache]: Analyzing trace with hash 819257656, now seen corresponding path program 1 times [2021-11-23 17:39:38,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:38,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [286149641] [2021-11-23 17:39:38,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:38,780 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:38,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:38,782 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:38,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:39:39,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:39,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:39:39,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:40,021 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:39:40,021 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:40,021 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:40,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [286149641] [2021-11-23 17:39:40,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [286149641] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:40,022 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:40,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 17:39:40,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226496426] [2021-11-23 17:39:40,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:39:40,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:39:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:39:40,024 INFO L87 Difference]: Start difference. First operand 20084 states and 23562 transitions. Second operand has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 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 17:39:42,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:42,605 INFO L93 Difference]: Finished difference Result 79519 states and 93299 transitions. [2021-11-23 17:39:42,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:39:42,605 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 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 283 [2021-11-23 17:39:42,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:42,801 INFO L225 Difference]: With dead ends: 79519 [2021-11-23 17:39:42,801 INFO L226 Difference]: Without dead ends: 59690 [2021-11-23 17:39:42,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:39:42,824 INFO L933 BasicCegarLoop]: 165 mSDtfsCounter, 912 mSDsluCounter, 735 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 912 SdHoareTripleChecker+Valid, 900 SdHoareTripleChecker+Invalid, 1212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:42,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [912 Valid, 900 Invalid, 1212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1017 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2021-11-23 17:39:42,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59690 states. [2021-11-23 17:39:44,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59690 to 59674. [2021-11-23 17:39:44,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59674 states, 59673 states have (on average 1.1697585172523588) internal successors, (69803), 59673 states have internal predecessors, (69803), 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 17:39:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59674 states to 59674 states and 69803 transitions. [2021-11-23 17:39:44,549 INFO L78 Accepts]: Start accepts. Automaton has 59674 states and 69803 transitions. Word has length 283 [2021-11-23 17:39:44,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:44,550 INFO L470 AbstractCegarLoop]: Abstraction has 59674 states and 69803 transitions. [2021-11-23 17:39:44,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 54.8) internal successors, (274), 4 states have internal predecessors, (274), 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 17:39:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 59674 states and 69803 transitions. [2021-11-23 17:39:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-11-23 17:39:44,587 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:44,588 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:44,606 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:44,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:44,802 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:44,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:44,803 INFO L85 PathProgramCache]: Analyzing trace with hash -1143617586, now seen corresponding path program 1 times [2021-11-23 17:39:44,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:44,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1012261856] [2021-11-23 17:39:44,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:44,805 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:44,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:44,806 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:44,808 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 17:39:44,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:44,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:39:44,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:45,941 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 142 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-23 17:39:45,941 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:45,941 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:45,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1012261856] [2021-11-23 17:39:45,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1012261856] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:45,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:45,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:45,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347310737] [2021-11-23 17:39:45,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:45,942 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:39:45,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:45,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:39:45,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:39:45,943 INFO L87 Difference]: Start difference. First operand 59674 states and 69803 transitions. Second operand has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 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 17:39:48,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:48,474 INFO L93 Difference]: Finished difference Result 202200 states and 234937 transitions. [2021-11-23 17:39:48,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:39:48,475 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 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 284 [2021-11-23 17:39:48,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:48,849 INFO L225 Difference]: With dead ends: 202200 [2021-11-23 17:39:48,849 INFO L226 Difference]: Without dead ends: 142781 [2021-11-23 17:39:48,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 281 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:39:48,925 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 512 mSDsluCounter, 331 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 512 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 818 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:48,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [512 Valid, 662 Invalid, 818 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:39:49,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142781 states. [2021-11-23 17:39:51,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142781 to 142526. [2021-11-23 17:39:51,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142526 states, 142525 states have (on average 1.1573758989650937) internal successors, (164955), 142525 states have internal predecessors, (164955), 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 17:39:51,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142526 states to 142526 states and 164955 transitions. [2021-11-23 17:39:51,901 INFO L78 Accepts]: Start accepts. Automaton has 142526 states and 164955 transitions. Word has length 284 [2021-11-23 17:39:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:51,901 INFO L470 AbstractCegarLoop]: Abstraction has 142526 states and 164955 transitions. [2021-11-23 17:39:51,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 68.75) internal successors, (275), 3 states have internal predecessors, (275), 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 17:39:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 142526 states and 164955 transitions. [2021-11-23 17:39:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2021-11-23 17:39:51,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:51,938 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:39:51,951 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:52,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:52,142 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:52,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:52,142 INFO L85 PathProgramCache]: Analyzing trace with hash 585009685, now seen corresponding path program 1 times [2021-11-23 17:39:52,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:52,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1320316753] [2021-11-23 17:39:52,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:52,145 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:52,145 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:52,146 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:52,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:39:52,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:52,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:39:52,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:53,310 INFO L134 CoverageAnalysis]: Checked inductivity of 206 backedges. 150 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 17:39:53,310 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:53,311 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:53,311 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1320316753] [2021-11-23 17:39:53,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1320316753] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:53,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:53,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:39:53,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038331376] [2021-11-23 17:39:53,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:53,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:53,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:53,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:53,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:53,313 INFO L87 Difference]: Start difference. First operand 142526 states and 164955 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 17:39:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:56,227 INFO L93 Difference]: Finished difference Result 352297 states and 409068 transitions. [2021-11-23 17:39:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:56,228 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 289 [2021-11-23 17:39:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:56,550 INFO L225 Difference]: With dead ends: 352297 [2021-11-23 17:39:56,550 INFO L226 Difference]: Without dead ends: 209202 [2021-11-23 17:39:56,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 287 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 17:39:56,642 INFO L933 BasicCegarLoop]: 288 mSDtfsCounter, 173 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:56,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 309 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:39:56,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209202 states. [2021-11-23 17:39:59,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209202 to 173324. [2021-11-23 17:39:59,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173324 states, 173323 states have (on average 1.1278883933465265) internal successors, (195489), 173323 states have internal predecessors, (195489), 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 17:40:00,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173324 states to 173324 states and 195489 transitions. [2021-11-23 17:40:00,685 INFO L78 Accepts]: Start accepts. Automaton has 173324 states and 195489 transitions. Word has length 289 [2021-11-23 17:40:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 173324 states and 195489 transitions. [2021-11-23 17:40:00,687 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 17:40:00,687 INFO L276 IsEmpty]: Start isEmpty. Operand 173324 states and 195489 transitions. [2021-11-23 17:40:00,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 369 [2021-11-23 17:40:00,779 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:00,780 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:40:00,793 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:00,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:00,982 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:00,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:00,983 INFO L85 PathProgramCache]: Analyzing trace with hash -828991978, now seen corresponding path program 1 times [2021-11-23 17:40:00,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:00,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [233701477] [2021-11-23 17:40:00,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:00,987 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:00,987 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:00,988 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:00,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 17:40:01,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:01,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:01,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:01,929 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 249 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 17:40:01,929 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:01,930 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:01,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [233701477] [2021-11-23 17:40:01,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [233701477] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:01,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:01,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:01,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98365374] [2021-11-23 17:40:01,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:01,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:01,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:01,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:01,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:01,932 INFO L87 Difference]: Start difference. First operand 173324 states and 195489 transitions. Second operand has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 17:40:05,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:05,137 INFO L93 Difference]: Finished difference Result 395536 states and 446223 transitions. [2021-11-23 17:40:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:05,138 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 368 [2021-11-23 17:40:05,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:05,427 INFO L225 Difference]: With dead ends: 395536 [2021-11-23 17:40:05,427 INFO L226 Difference]: Without dead ends: 214538 [2021-11-23 17:40:05,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 366 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 17:40:05,497 INFO L933 BasicCegarLoop]: 396 mSDtfsCounter, 164 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 420 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:05,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 420 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2021-11-23 17:40:05,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214538 states. [2021-11-23 17:40:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214538 to 203876. [2021-11-23 17:40:09,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203876 states, 203875 states have (on average 1.1034163090128755) internal successors, (224959), 203875 states have internal predecessors, (224959), 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 17:40:09,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203876 states to 203876 states and 224959 transitions. [2021-11-23 17:40:09,562 INFO L78 Accepts]: Start accepts. Automaton has 203876 states and 224959 transitions. Word has length 368 [2021-11-23 17:40:09,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:09,563 INFO L470 AbstractCegarLoop]: Abstraction has 203876 states and 224959 transitions. [2021-11-23 17:40:09,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 121.0) internal successors, (363), 3 states have internal predecessors, (363), 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 17:40:09,564 INFO L276 IsEmpty]: Start isEmpty. Operand 203876 states and 224959 transitions. [2021-11-23 17:40:09,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 432 [2021-11-23 17:40:09,695 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:09,696 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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] [2021-11-23 17:40:09,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:09,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:09,897 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:09,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:09,898 INFO L85 PathProgramCache]: Analyzing trace with hash 614489283, now seen corresponding path program 1 times [2021-11-23 17:40:09,901 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:09,901 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [387038923] [2021-11-23 17:40:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:09,902 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:09,902 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:09,905 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:09,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:40:10,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:10,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 608 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:10,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:11,976 INFO L134 CoverageAnalysis]: Checked inductivity of 434 backedges. 286 proven. 0 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-23 17:40:11,977 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:11,977 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:11,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [387038923] [2021-11-23 17:40:11,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [387038923] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:11,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:11,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:11,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339085138] [2021-11-23 17:40:11,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:11,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:40:11,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:11,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:40:11,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:11,979 INFO L87 Difference]: Start difference. First operand 203876 states and 224959 transitions. Second operand has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:15,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:15,990 INFO L93 Difference]: Finished difference Result 450417 states and 498524 transitions. [2021-11-23 17:40:15,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:40:15,992 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 431 [2021-11-23 17:40:15,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:16,334 INFO L225 Difference]: With dead ends: 450417 [2021-11-23 17:40:16,334 INFO L226 Difference]: Without dead ends: 246784 [2021-11-23 17:40:16,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 428 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:16,406 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 370 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 1197 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 1339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 1197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:16,406 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 236 Invalid, 1339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 1197 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2021-11-23 17:40:16,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246784 states. [2021-11-23 17:40:20,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246784 to 244278. [2021-11-23 17:40:20,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244278 states, 244277 states have (on average 1.0848503952480175) internal successors, (265004), 244277 states have internal predecessors, (265004), 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 17:40:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244278 states to 244278 states and 265004 transitions. [2021-11-23 17:40:21,386 INFO L78 Accepts]: Start accepts. Automaton has 244278 states and 265004 transitions. Word has length 431 [2021-11-23 17:40:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 244278 states and 265004 transitions. [2021-11-23 17:40:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 83.25) internal successors, (333), 3 states have internal predecessors, (333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:40:21,387 INFO L276 IsEmpty]: Start isEmpty. Operand 244278 states and 265004 transitions. [2021-11-23 17:40:21,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 440 [2021-11-23 17:40:21,472 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:21,473 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 17:40:21,483 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:21,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:21,675 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:21,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:21,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1078893104, now seen corresponding path program 1 times [2021-11-23 17:40:21,679 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:21,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1315439859] [2021-11-23 17:40:21,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:21,680 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:21,680 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:21,681 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:21,708 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 17:40:21,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:21,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 582 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:40:21,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:24,027 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 346 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 17:40:24,028 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:24,028 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:24,028 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1315439859] [2021-11-23 17:40:24,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1315439859] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:24,028 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:24,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:24,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709624916] [2021-11-23 17:40:24,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:24,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:40:24,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:24,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:40:24,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:24,030 INFO L87 Difference]: Start difference. First operand 244278 states and 265004 transitions. Second operand has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 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 17:40:27,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:27,367 INFO L93 Difference]: Finished difference Result 493163 states and 533850 transitions. [2021-11-23 17:40:27,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:40:27,368 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 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 439 [2021-11-23 17:40:27,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:27,704 INFO L225 Difference]: With dead ends: 493163 [2021-11-23 17:40:27,704 INFO L226 Difference]: Without dead ends: 249128 [2021-11-23 17:40:27,790 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 436 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:27,791 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 666 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:27,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [666 Valid, 43 Invalid, 699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 575 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2021-11-23 17:40:28,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249128 states. [2021-11-23 17:40:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249128 to 131209. [2021-11-23 17:40:31,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131209 states, 131208 states have (on average 1.0677245289921347) internal successors, (140094), 131208 states have internal predecessors, (140094), 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 17:40:31,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131209 states to 131209 states and 140094 transitions. [2021-11-23 17:40:31,835 INFO L78 Accepts]: Start accepts. Automaton has 131209 states and 140094 transitions. Word has length 439 [2021-11-23 17:40:31,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:31,837 INFO L470 AbstractCegarLoop]: Abstraction has 131209 states and 140094 transitions. [2021-11-23 17:40:31,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 87.25) internal successors, (349), 3 states have internal predecessors, (349), 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 17:40:31,838 INFO L276 IsEmpty]: Start isEmpty. Operand 131209 states and 140094 transitions. [2021-11-23 17:40:31,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 441 [2021-11-23 17:40:31,876 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:31,876 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:40:31,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-23 17:40:32,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:32,077 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:32,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:32,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1956777170, now seen corresponding path program 1 times [2021-11-23 17:40:32,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:32,081 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [377253663] [2021-11-23 17:40:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:32,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:32,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:32,083 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:32,083 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e8b5830-b99e-4000-8c5f-3574cdfde399/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 17:40:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:32,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:40:32,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:33,011 INFO L134 CoverageAnalysis]: Checked inductivity of 826 backedges. 410 proven. 0 refuted. 0 times theorem prover too weak. 416 trivial. 0 not checked. [2021-11-23 17:40:33,012 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:33,012 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:33,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [377253663] [2021-11-23 17:40:33,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [377253663] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:33,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:33,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:33,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758931359] [2021-11-23 17:40:33,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:33,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:40:33,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:40:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:33,014 INFO L87 Difference]: Start difference. First operand 131209 states and 140094 transitions. Second operand has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 17:40:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:35,862 INFO L93 Difference]: Finished difference Result 270382 states and 289503 transitions. [2021-11-23 17:40:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 17:40:35,863 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 68.25) internal successors, (273), 3 states have internal predecessors, (273), 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 440 [2021-11-23 17:40:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:36,018 INFO L225 Difference]: With dead ends: 270382 [2021-11-23 17:40:36,019 INFO L226 Difference]: Without dead ends: 139213 [2021-11-23 17:40:36,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 437 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:40:36,057 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 474 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 860 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 474 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:36,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [474 Valid, 110 Invalid, 1084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 860 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2021-11-23 17:40:36,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139213 states.