./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem13_label52.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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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 eceda023c7394c88c46221fb5ed6b67ae6e1976efca78e0b148b1f17e3b2b45b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:42,437 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:42,440 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:42,473 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:42,474 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:42,476 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:42,478 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:42,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:42,483 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:42,484 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:42,485 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:42,487 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:42,487 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:42,489 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:42,490 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:42,492 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:42,493 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:42,495 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:42,497 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:42,500 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:42,502 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:42,509 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:42,510 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:42,511 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:42,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:42,516 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:42,516 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:42,517 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:42,518 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:42,519 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:42,520 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:42,521 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:42,528 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:42,531 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:42,533 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:42,533 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:42,534 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:42,534 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:42,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:42,536 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:42,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:42,537 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 17:35:42,591 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:42,591 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:42,592 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:42,592 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:42,593 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:42,593 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:42,593 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:42,594 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:42,594 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:42,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 17:35:42,595 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:42,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:42,596 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 17:35:42,596 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 17:35:42,596 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:42,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 17:35:42,596 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 17:35:42,597 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 17:35:42,597 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:42,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:42,598 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 17:35:42,598 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:42,598 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:42,598 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:42,599 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:42,599 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:42,600 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:42,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:42,601 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:42,601 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:42,601 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:42,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:42,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:42,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:42,602 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:42,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:42,603 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 17:35:42,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 17:35:42,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:42,603 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:42,604 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:42,604 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eceda023c7394c88c46221fb5ed6b67ae6e1976efca78e0b148b1f17e3b2b45b [2021-11-23 17:35:42,935 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:42,966 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:42,970 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:42,971 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:42,971 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:42,973 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2021-11-23 17:35:43,072 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/28fb86ad6/e6ba56f1f57e4f01a4e199e13182f5f6/FLAGb1787d49d [2021-11-23 17:35:44,143 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:35:44,144 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2021-11-23 17:35:44,201 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/28fb86ad6/e6ba56f1f57e4f01a4e199e13182f5f6/FLAGb1787d49d [2021-11-23 17:35:44,559 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/28fb86ad6/e6ba56f1f57e4f01a4e199e13182f5f6 [2021-11-23 17:35:44,563 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:35:44,566 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:35:44,571 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:44,571 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:35:44,576 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:35:44,578 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:44" (1/1) ... [2021-11-23 17:35:44,581 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1339c25c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:44, skipping insertion in model container [2021-11-23 17:35:44,582 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:35:44" (1/1) ... [2021-11-23 17:35:44,590 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:35:44,750 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:35:45,171 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c[9091,9104] [2021-11-23 17:35:46,428 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:46,441 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:35:46,487 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c[9091,9104] [2021-11-23 17:35:47,241 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:35:47,271 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:35:47,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47 WrapperNode [2021-11-23 17:35:47,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:35:47,274 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:47,274 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:35:47,274 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:35:47,284 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:47,391 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,186 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5583 [2021-11-23 17:35:48,188 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:35:48,206 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:35:48,206 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:35:48,207 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:35:48,228 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,229 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,348 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,348 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,720 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,769 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:48,847 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:49,019 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:35:49,021 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:35:49,021 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:35:49,021 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:35:49,022 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:35:47" (1/1) ... [2021-11-23 17:35:49,032 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:49,043 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:35:49,063 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:35:49,089 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:35:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:35:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 17:35:49,129 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:35:49,177 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:35:49,244 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:35:49,246 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:35:55,600 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:35:55,682 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 17:35:55,689 INFO L158 Benchmark]: Toolchain (without parser) took 11120.29ms. Allocated memory was 104.9MB in the beginning and 729.8MB in the end (delta: 625.0MB). Free memory was 69.4MB in the beginning and 542.8MB in the end (delta: -473.4MB). Peak memory consumption was 314.6MB. Max. memory is 16.1GB. [2021-11-23 17:35:55,690 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 17:35:55,692 INFO L158 Benchmark]: CACSL2BoogieTranslator took 2702.29ms. Allocated memory was 104.9MB in the beginning and 182.5MB in the end (delta: 77.6MB). Free memory was 69.2MB in the beginning and 108.7MB in the end (delta: -39.5MB). Peak memory consumption was 76.8MB. Max. memory is 16.1GB. [2021-11-23 17:35:55,694 INFO L158 Benchmark]: Boogie Procedure Inliner took 915.78ms. Allocated memory was 182.5MB in the beginning and 364.9MB in the end (delta: 182.5MB). Free memory was 108.7MB in the beginning and 231.1MB in the end (delta: -122.4MB). Peak memory consumption was 105.0MB. Max. memory is 16.1GB. [2021-11-23 17:35:55,695 INFO L158 Benchmark]: Boogie Preprocessor took 813.58ms. Allocated memory is still 364.9MB. Free memory was 231.1MB in the beginning and 206.6MB in the end (delta: 24.4MB). Peak memory consumption was 77.1MB. Max. memory is 16.1GB. [2021-11-23 17:35:55,696 INFO L158 Benchmark]: RCFGBuilder took 6664.87ms. Allocated memory was 364.9MB in the beginning and 729.8MB in the end (delta: 364.9MB). Free memory was 206.5MB in the beginning and 542.8MB in the end (delta: -336.4MB). Peak memory consumption was 194.2MB. Max. memory is 16.1GB. [2021-11-23 17:35:55,707 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 104.9MB. Free memory is still 78.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 2702.29ms. Allocated memory was 104.9MB in the beginning and 182.5MB in the end (delta: 77.6MB). Free memory was 69.2MB in the beginning and 108.7MB in the end (delta: -39.5MB). Peak memory consumption was 76.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 915.78ms. Allocated memory was 182.5MB in the beginning and 364.9MB in the end (delta: 182.5MB). Free memory was 108.7MB in the beginning and 231.1MB in the end (delta: -122.4MB). Peak memory consumption was 105.0MB. Max. memory is 16.1GB. * Boogie Preprocessor took 813.58ms. Allocated memory is still 364.9MB. Free memory was 231.1MB in the beginning and 206.6MB in the end (delta: 24.4MB). Peak memory consumption was 77.1MB. Max. memory is 16.1GB. * RCFGBuilder took 6664.87ms. Allocated memory was 364.9MB in the beginning and 729.8MB in the end (delta: 364.9MB). Free memory was 206.5MB in the beginning and 542.8MB in the end (delta: -336.4MB). Peak memory consumption was 194.2MB. 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 17:35:55,737 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem13_label52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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 eceda023c7394c88c46221fb5ed6b67ae6e1976efca78e0b148b1f17e3b2b45b --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 17:35:58,332 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 17:35:58,337 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 17:35:58,387 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 17:35:58,388 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 17:35:58,393 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 17:35:58,396 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 17:35:58,404 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 17:35:58,408 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 17:35:58,416 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 17:35:58,418 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 17:35:58,420 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 17:35:58,421 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 17:35:58,424 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 17:35:58,426 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 17:35:58,432 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 17:35:58,434 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 17:35:58,436 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 17:35:58,438 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 17:35:58,441 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 17:35:58,443 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 17:35:58,445 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 17:35:58,446 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 17:35:58,447 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 17:35:58,451 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 17:35:58,451 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 17:35:58,452 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 17:35:58,453 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 17:35:58,454 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 17:35:58,455 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 17:35:58,455 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 17:35:58,456 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 17:35:58,457 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 17:35:58,458 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 17:35:58,460 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 17:35:58,460 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 17:35:58,461 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 17:35:58,461 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 17:35:58,461 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 17:35:58,462 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 17:35:58,463 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 17:35:58,464 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 17:35:58,494 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 17:35:58,495 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 17:35:58,495 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 17:35:58,495 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 17:35:58,496 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 17:35:58,496 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 17:35:58,496 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 17:35:58,497 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 17:35:58,497 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 17:35:58,497 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 17:35:58,497 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 17:35:58,498 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 17:35:58,498 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 17:35:58,499 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 17:35:58,499 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 17:35:58,499 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 17:35:58,499 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 17:35:58,499 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 17:35:58,500 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 17:35:58,500 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 17:35:58,500 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 17:35:58,500 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 17:35:58,501 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 17:35:58,501 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 17:35:58,501 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 17:35:58,501 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 17:35:58,501 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 17:35:58,502 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 17:35:58,502 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 17:35:58,502 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:35:58,502 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 17:35:58,503 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 17:35:58,503 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 17:35:58,503 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 17:35:58,503 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 17:35:58,503 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 17:35:58,504 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 17:35:58,504 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 17:35:58,504 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> eceda023c7394c88c46221fb5ed6b67ae6e1976efca78e0b148b1f17e3b2b45b [2021-11-23 17:35:58,927 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 17:35:58,956 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 17:35:58,958 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 17:35:58,959 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 17:35:58,960 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 17:35:58,961 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2021-11-23 17:35:59,051 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/faa0a5a63/2fec8b462f724570a21a8c3e07cdb8aa/FLAG55cd1579a [2021-11-23 17:36:00,184 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 17:36:00,185 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c [2021-11-23 17:36:00,222 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/faa0a5a63/2fec8b462f724570a21a8c3e07cdb8aa/FLAG55cd1579a [2021-11-23 17:36:00,513 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/data/faa0a5a63/2fec8b462f724570a21a8c3e07cdb8aa [2021-11-23 17:36:00,516 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 17:36:00,518 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 17:36:00,519 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:00,520 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 17:36:00,524 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 17:36:00,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:00" (1/1) ... [2021-11-23 17:36:00,526 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40db40e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:00, skipping insertion in model container [2021-11-23 17:36:00,527 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 05:36:00" (1/1) ... [2021-11-23 17:36:00,535 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 17:36:00,721 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 17:36:01,123 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c[9091,9104] [2021-11-23 17:36:02,456 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:02,469 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 17:36:02,507 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_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/sv-benchmarks/c/eca-rers2012/Problem13_label52.c[9091,9104] [2021-11-23 17:36:03,299 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 17:36:03,331 INFO L208 MainTranslator]: Completed translation [2021-11-23 17:36:03,332 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03 WrapperNode [2021-11-23 17:36:03,332 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 17:36:03,334 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:03,334 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 17:36:03,334 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 17:36:03,341 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,439 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,720 INFO L137 Inliner]: procedures = 17, calls = 11, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 5578 [2021-11-23 17:36:03,721 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 17:36:03,721 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 17:36:03,722 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 17:36:03,722 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 17:36:03,730 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,731 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,838 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:03,981 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:04,028 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:04,047 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:04,081 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 17:36:04,083 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 17:36:04,084 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 17:36:04,085 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 17:36:04,089 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (1/1) ... [2021-11-23 17:36:04,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 17:36:04,111 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 17:36:04,131 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 17:36:04,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 17:36:04,186 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 17:36:04,186 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 17:36:04,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 17:36:04,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 17:36:04,315 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 17:36:04,317 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 17:36:58,751 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 17:36:58,779 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 17:36:58,780 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 17:36:58,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:36:58 BoogieIcfgContainer [2021-11-23 17:36:58,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 17:36:58,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 17:36:58,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 17:36:58,791 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 17:36:58,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 05:36:00" (1/3) ... [2021-11-23 17:36:58,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbc9904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:36:58, skipping insertion in model container [2021-11-23 17:36:58,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 05:36:03" (2/3) ... [2021-11-23 17:36:58,793 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cbc9904 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 05:36:58, skipping insertion in model container [2021-11-23 17:36:58,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 05:36:58" (3/3) ... [2021-11-23 17:36:58,795 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem13_label52.c [2021-11-23 17:36:58,802 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 17:36:58,802 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 17:36:58,873 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 17:36:58,881 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 17:36:58,881 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 17:36:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 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 17:36:58,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 17:36:58,942 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:36:58,943 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] [2021-11-23 17:36:58,944 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:36:58,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:36:58,950 INFO L85 PathProgramCache]: Analyzing trace with hash -107486446, now seen corresponding path program 1 times [2021-11-23 17:36:58,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:36:58,967 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [198205135] [2021-11-23 17:36:58,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:36:58,968 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:36:58,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:36:58,972 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:36:59,001 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 17:36:59,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:36:59,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:36:59,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:36:59,639 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 17:36:59,639 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:36:59,640 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:36:59,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [198205135] [2021-11-23 17:36:59,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [198205135] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:36:59,641 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:36:59,641 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:36:59,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114996359] [2021-11-23 17:36:59,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:36:59,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:36:59,651 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:36:59,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:36:59,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:36:59,695 INFO L87 Difference]: Start difference. First operand has 1098 states, 1096 states have (on average 1.8275547445255473) internal successors, (2003), 1097 states have internal predecessors, (2003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 17:38:02,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:38:02,910 INFO L93 Difference]: Finished difference Result 3035 states and 5643 transitions. [2021-11-23 17:38:02,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:38:02,913 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 64 [2021-11-23 17:38:02,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:38:02,947 INFO L225 Difference]: With dead ends: 3035 [2021-11-23 17:38:02,947 INFO L226 Difference]: Without dead ends: 1873 [2021-11-23 17:38:02,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 62 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 17:38:02,959 INFO L933 BasicCegarLoop]: 991 mSDtfsCounter, 841 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 858 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 52.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 841 SdHoareTripleChecker+Valid, 1145 SdHoareTripleChecker+Invalid, 3363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 858 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 62.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:38:02,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [841 Valid, 1145 Invalid, 3363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [858 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 62.9s Time] [2021-11-23 17:38:02,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1873 states. [2021-11-23 17:38:03,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1873 to 1859. [2021-11-23 17:38:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1859 states, 1858 states have (on average 1.5441334768568353) internal successors, (2869), 1858 states have internal predecessors, (2869), 0 states have call successors, (0), 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 17:38:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1859 states to 1859 states and 2869 transitions. [2021-11-23 17:38:03,104 INFO L78 Accepts]: Start accepts. Automaton has 1859 states and 2869 transitions. Word has length 64 [2021-11-23 17:38:03,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:38:03,105 INFO L470 AbstractCegarLoop]: Abstraction has 1859 states and 2869 transitions. [2021-11-23 17:38:03,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 2 states have internal predecessors, (64), 0 states have call successors, (0), 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 17:38:03,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1859 states and 2869 transitions. [2021-11-23 17:38:03,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 17:38:03,111 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:38:03,112 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:38:03,126 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 17:38:03,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:38:03,322 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:38:03,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:38:03,323 INFO L85 PathProgramCache]: Analyzing trace with hash 700651805, now seen corresponding path program 1 times [2021-11-23 17:38:03,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:38:03,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [52711821] [2021-11-23 17:38:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:38:03,326 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:38:03,326 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:38:03,327 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:38:03,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 17:38:03,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:38:03,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:38:03,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:38:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:38:04,109 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:38:04,110 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:38:04,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [52711821] [2021-11-23 17:38:04,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [52711821] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:38:04,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:38:04,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:38:04,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783128075] [2021-11-23 17:38:04,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:38:04,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:38:04,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:38:04,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:38:04,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:38:04,114 INFO L87 Difference]: Start difference. First operand 1859 states and 2869 transitions. Second operand has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 17:39:20,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:39:20,505 INFO L93 Difference]: Finished difference Result 5365 states and 8343 transitions. [2021-11-23 17:39:20,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:39:20,516 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 136 [2021-11-23 17:39:20,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:39:20,539 INFO L225 Difference]: With dead ends: 5365 [2021-11-23 17:39:20,540 INFO L226 Difference]: Without dead ends: 3508 [2021-11-23 17:39:20,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 134 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 17:39:20,545 INFO L933 BasicCegarLoop]: 973 mSDtfsCounter, 810 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 3316 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 3676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 3316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 76.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:39:20,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 1109 Invalid, 3676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 3316 Invalid, 0 Unknown, 0 Unchecked, 76.2s Time] [2021-11-23 17:39:20,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3508 states. [2021-11-23 17:39:20,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3508 to 3449. [2021-11-23 17:39:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3449 states, 3448 states have (on average 1.4289443155452437) internal successors, (4927), 3448 states have internal predecessors, (4927), 0 states have call successors, (0), 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 17:39:20,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3449 states to 3449 states and 4927 transitions. [2021-11-23 17:39:20,648 INFO L78 Accepts]: Start accepts. Automaton has 3449 states and 4927 transitions. Word has length 136 [2021-11-23 17:39:20,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:39:20,651 INFO L470 AbstractCegarLoop]: Abstraction has 3449 states and 4927 transitions. [2021-11-23 17:39:20,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.333333333333336) internal successors, (136), 2 states have internal predecessors, (136), 0 states have call successors, (0), 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 17:39:20,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3449 states and 4927 transitions. [2021-11-23 17:39:20,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-23 17:39:20,659 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:39:20,659 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 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 17:39:20,671 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 17:39:20,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:39:20,862 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:39:20,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:39:20,863 INFO L85 PathProgramCache]: Analyzing trace with hash 656195604, now seen corresponding path program 1 times [2021-11-23 17:39:20,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:39:20,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1085079831] [2021-11-23 17:39:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:39:20,864 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:39:20,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:39:20,867 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:39:20,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 17:39:20,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:39:21,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 17:39:21,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:39:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:39:21,968 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:39:21,968 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:39:21,969 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1085079831] [2021-11-23 17:39:21,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1085079831] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:39:21,969 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:39:21,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:39:21,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993354631] [2021-11-23 17:39:21,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:39:22,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:39:22,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:39:22,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:39:22,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:39:22,002 INFO L87 Difference]: Start difference. First operand 3449 states and 4927 transitions. Second operand has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 17:40:15,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:40:15,493 INFO L93 Difference]: Finished difference Result 6108 states and 8702 transitions. [2021-11-23 17:40:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:40:15,494 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 150 [2021-11-23 17:40:15,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:40:15,517 INFO L225 Difference]: With dead ends: 6108 [2021-11-23 17:40:15,518 INFO L226 Difference]: Without dead ends: 4250 [2021-11-23 17:40:15,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 148 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 17:40:15,523 INFO L933 BasicCegarLoop]: 999 mSDtfsCounter, 719 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 2624 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 45.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 719 SdHoareTripleChecker+Valid, 1128 SdHoareTripleChecker+Invalid, 2643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 53.4s IncrementalHoareTripleChecker+Time [2021-11-23 17:40:15,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [719 Valid, 1128 Invalid, 2643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2624 Invalid, 0 Unknown, 0 Unchecked, 53.4s Time] [2021-11-23 17:40:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4250 states. [2021-11-23 17:40:15,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4250 to 4236. [2021-11-23 17:40:15,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4236 states, 4235 states have (on average 1.3669421487603306) internal successors, (5789), 4235 states have internal predecessors, (5789), 0 states have call successors, (0), 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 17:40:15,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4236 states to 4236 states and 5789 transitions. [2021-11-23 17:40:15,631 INFO L78 Accepts]: Start accepts. Automaton has 4236 states and 5789 transitions. Word has length 150 [2021-11-23 17:40:15,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:40:15,632 INFO L470 AbstractCegarLoop]: Abstraction has 4236 states and 5789 transitions. [2021-11-23 17:40:15,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 50.0) internal successors, (150), 2 states have internal predecessors, (150), 0 states have call successors, (0), 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 17:40:15,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4236 states and 5789 transitions. [2021-11-23 17:40:15,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-23 17:40:15,635 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:40:15,636 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:40:15,648 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Ended with exit code 0 [2021-11-23 17:40:15,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:40:15,848 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:40:15,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:40:15,850 INFO L85 PathProgramCache]: Analyzing trace with hash 984431379, now seen corresponding path program 1 times [2021-11-23 17:40:15,851 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:40:15,851 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [482608898] [2021-11-23 17:40:15,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:40:15,852 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:40:15,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:40:15,853 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:40:15,883 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 17:40:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:40:16,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:40:16,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:40:16,420 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:40:16,420 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:40:16,420 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:40:16,421 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [482608898] [2021-11-23 17:40:16,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [482608898] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:40:16,421 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:40:16,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:40:16,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667979233] [2021-11-23 17:40:16,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:40:16,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:40:16,422 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:40:16,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:40:16,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:40:16,423 INFO L87 Difference]: Start difference. First operand 4236 states and 5789 transitions. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 17:41:16,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:41:16,474 INFO L93 Difference]: Finished difference Result 9307 states and 13451 transitions. [2021-11-23 17:41:16,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:41:16,486 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 160 [2021-11-23 17:41:16,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:41:16,520 INFO L225 Difference]: With dead ends: 9307 [2021-11-23 17:41:16,520 INFO L226 Difference]: Without dead ends: 5860 [2021-11-23 17:41:16,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 158 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 17:41:16,536 INFO L933 BasicCegarLoop]: 1706 mSDtfsCounter, 834 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 2500 mSolverCounterSat, 741 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 49.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 834 SdHoareTripleChecker+Valid, 1851 SdHoareTripleChecker+Invalid, 3241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 741 IncrementalHoareTripleChecker+Valid, 2500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 59.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:41:16,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [834 Valid, 1851 Invalid, 3241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [741 Valid, 2500 Invalid, 0 Unknown, 0 Unchecked, 59.9s Time] [2021-11-23 17:41:16,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5860 states. [2021-11-23 17:41:16,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5860 to 5838. [2021-11-23 17:41:16,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5838 states, 5837 states have (on average 1.316772314545143) internal successors, (7686), 5837 states have internal predecessors, (7686), 0 states have call successors, (0), 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 17:41:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5838 states to 5838 states and 7686 transitions. [2021-11-23 17:41:16,690 INFO L78 Accepts]: Start accepts. Automaton has 5838 states and 7686 transitions. Word has length 160 [2021-11-23 17:41:16,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:41:16,692 INFO L470 AbstractCegarLoop]: Abstraction has 5838 states and 7686 transitions. [2021-11-23 17:41:16,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 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 17:41:16,692 INFO L276 IsEmpty]: Start isEmpty. Operand 5838 states and 7686 transitions. [2021-11-23 17:41:16,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-23 17:41:16,696 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:41:16,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:41:16,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 17:41:16,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:41:16,909 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:41:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:41:16,911 INFO L85 PathProgramCache]: Analyzing trace with hash 1480170377, now seen corresponding path program 1 times [2021-11-23 17:41:16,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:41:16,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419231998] [2021-11-23 17:41:16,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:41:16,913 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:41:16,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:41:16,918 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:41:16,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 17:41:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:41:17,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:41:17,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:41:17,599 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:41:17,599 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:41:17,599 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:41:17,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1419231998] [2021-11-23 17:41:17,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1419231998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:41:17,599 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:41:17,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:41:17,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625464056] [2021-11-23 17:41:17,600 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:41:17,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:41:17,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:41:17,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:41:17,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:41:17,602 INFO L87 Difference]: Start difference. First operand 5838 states and 7686 transitions. Second operand has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 17:42:28,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:42:28,744 INFO L93 Difference]: Finished difference Result 10893 states and 15054 transitions. [2021-11-23 17:42:28,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:42:28,750 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 164 [2021-11-23 17:42:28,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:42:28,771 INFO L225 Difference]: With dead ends: 10893 [2021-11-23 17:42:28,771 INFO L226 Difference]: Without dead ends: 5844 [2021-11-23 17:42:28,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 162 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 17:42:28,779 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 749 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2730 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 59.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 749 SdHoareTripleChecker+Valid, 1235 SdHoareTripleChecker+Invalid, 3296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 2730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 71.0s IncrementalHoareTripleChecker+Time [2021-11-23 17:42:28,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [749 Valid, 1235 Invalid, 3296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 2730 Invalid, 0 Unknown, 0 Unchecked, 71.0s Time] [2021-11-23 17:42:28,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5844 states. [2021-11-23 17:42:28,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5844 to 5837. [2021-11-23 17:42:28,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5837 states, 5836 states have (on average 1.2498286497601097) internal successors, (7294), 5836 states have internal predecessors, (7294), 0 states have call successors, (0), 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 17:42:28,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5837 states to 5837 states and 7294 transitions. [2021-11-23 17:42:28,898 INFO L78 Accepts]: Start accepts. Automaton has 5837 states and 7294 transitions. Word has length 164 [2021-11-23 17:42:28,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:42:28,899 INFO L470 AbstractCegarLoop]: Abstraction has 5837 states and 7294 transitions. [2021-11-23 17:42:28,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 54.666666666666664) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 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 17:42:28,899 INFO L276 IsEmpty]: Start isEmpty. Operand 5837 states and 7294 transitions. [2021-11-23 17:42:28,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-23 17:42:28,902 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:42:28,902 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:42:28,925 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 17:42:29,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:42:29,115 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:42:29,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:42:29,115 INFO L85 PathProgramCache]: Analyzing trace with hash 605056438, now seen corresponding path program 1 times [2021-11-23 17:42:29,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:42:29,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2015824693] [2021-11-23 17:42:29,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:29,117 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:42:29,117 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:42:29,118 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:42:29,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 17:42:29,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:29,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:42:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:31,607 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:42:35,699 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:35,699 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:42:35,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2015824693] [2021-11-23 17:42:35,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2015824693] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:42:35,699 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1049828341] [2021-11-23 17:42:35,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:42:35,700 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:42:35,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:42:35,711 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:42:35,729 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 17:42:35,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:42:35,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-23 17:42:35,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:42:39,630 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 17:42:39,631 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:42:39,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1049828341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:42:39,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:42:39,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [4, 4] total 11 [2021-11-23 17:42:39,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844897952] [2021-11-23 17:42:39,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:42:39,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 17:42:39,633 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:42:39,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 17:42:39,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:42:39,634 INFO L87 Difference]: Start difference. First operand 5837 states and 7294 transitions. Second operand has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 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 17:43:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:43:45,766 INFO L93 Difference]: Finished difference Result 12027 states and 15826 transitions. [2021-11-23 17:43:45,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 17:43:45,776 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 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 169 [2021-11-23 17:43:45,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:43:45,811 INFO L225 Difference]: With dead ends: 12027 [2021-11-23 17:43:45,812 INFO L226 Difference]: Without dead ends: 9355 [2021-11-23 17:43:45,815 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 495 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:43:45,816 INFO L933 BasicCegarLoop]: 254 mSDtfsCounter, 5462 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2931 mSolverCounterSat, 3310 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 55.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5462 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 6241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3310 IncrementalHoareTripleChecker+Valid, 2931 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 65.9s IncrementalHoareTripleChecker+Time [2021-11-23 17:43:45,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5462 Valid, 368 Invalid, 6241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3310 Valid, 2931 Invalid, 0 Unknown, 0 Unchecked, 65.9s Time] [2021-11-23 17:43:45,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9355 states. [2021-11-23 17:43:45,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9355 to 8217. [2021-11-23 17:43:45,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8217 states, 8216 states have (on average 1.2941820837390459) internal successors, (10633), 8216 states have internal predecessors, (10633), 0 states have call successors, (0), 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 17:43:45,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 10633 transitions. [2021-11-23 17:43:45,986 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 10633 transitions. Word has length 169 [2021-11-23 17:43:45,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:43:45,988 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 10633 transitions. [2021-11-23 17:43:45,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 24.142857142857142) internal successors, (169), 7 states have internal predecessors, (169), 0 states have call successors, (0), 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 17:43:45,988 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 10633 transitions. [2021-11-23 17:43:45,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-23 17:43:45,994 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:43:45,994 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-23 17:43:46,013 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:46,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-11-23 17:43:46,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt [2021-11-23 17:43:46,408 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:43:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:43:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1288745555, now seen corresponding path program 1 times [2021-11-23 17:43:46,409 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:43:46,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [444448543] [2021-11-23 17:43:46,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:43:46,410 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:43:46,410 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:43:46,410 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:43:46,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 17:43:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:43:46,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 17:43:46,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:43:49,396 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 136 proven. 0 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:43:49,397 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:43:49,397 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:43:49,397 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [444448543] [2021-11-23 17:43:49,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [444448543] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:43:49,397 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:43:49,397 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 17:43:49,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327715170] [2021-11-23 17:43:49,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:43:49,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 17:43:49,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:43:49,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 17:43:49,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 17:43:49,400 INFO L87 Difference]: Start difference. First operand 8217 states and 10633 transitions. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 17:44:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:44:36,796 INFO L93 Difference]: Finished difference Result 15677 states and 20494 transitions. [2021-11-23 17:44:36,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:44:36,807 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 247 [2021-11-23 17:44:36,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:44:36,825 INFO L225 Difference]: With dead ends: 15677 [2021-11-23 17:44:36,826 INFO L226 Difference]: Without dead ends: 8249 [2021-11-23 17:44:36,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 17:44:36,833 INFO L933 BasicCegarLoop]: 1099 mSDtfsCounter, 1464 mSDsluCounter, 1420 mSDsCounter, 0 mSdLazyCounter, 2866 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 40.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1464 SdHoareTripleChecker+Valid, 2519 SdHoareTripleChecker+Invalid, 3047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 2866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 47.2s IncrementalHoareTripleChecker+Time [2021-11-23 17:44:36,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1464 Valid, 2519 Invalid, 3047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 2866 Invalid, 0 Unknown, 0 Unchecked, 47.2s Time] [2021-11-23 17:44:36,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8249 states. [2021-11-23 17:44:36,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8249 to 8217. [2021-11-23 17:44:36,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8217 states, 8216 states have (on average 1.2929649464459592) internal successors, (10623), 8216 states have internal predecessors, (10623), 0 states have call successors, (0), 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 17:44:36,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8217 states to 8217 states and 10623 transitions. [2021-11-23 17:44:36,966 INFO L78 Accepts]: Start accepts. Automaton has 8217 states and 10623 transitions. Word has length 247 [2021-11-23 17:44:36,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:44:36,966 INFO L470 AbstractCegarLoop]: Abstraction has 8217 states and 10623 transitions. [2021-11-23 17:44:36,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 3 states have internal predecessors, (186), 0 states have call successors, (0), 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 17:44:36,967 INFO L276 IsEmpty]: Start isEmpty. Operand 8217 states and 10623 transitions. [2021-11-23 17:44:36,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2021-11-23 17:44:36,973 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:44:36,974 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:44:36,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 17:44:37,190 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:44:37,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:44:37,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:44:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1307901194, now seen corresponding path program 1 times [2021-11-23 17:44:37,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:44:37,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2103975473] [2021-11-23 17:44:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:44:37,193 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:44:37,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:44:37,194 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:44:37,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 17:44:37,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:44:37,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:44:37,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:44:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 263 proven. 0 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-23 17:44:38,169 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:44:38,169 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:44:38,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2103975473] [2021-11-23 17:44:38,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2103975473] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:44:38,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 17:44:38,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 17:44:38,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559753574] [2021-11-23 17:44:38,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:44:38,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:44:38,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:44:38,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:44:38,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 17:44:38,171 INFO L87 Difference]: Start difference. First operand 8217 states and 10623 transitions. Second operand has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 17:45:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:45:24,797 INFO L93 Difference]: Finished difference Result 21155 states and 28009 transitions. [2021-11-23 17:45:24,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:45:24,801 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 303 [2021-11-23 17:45:24,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:45:24,823 INFO L225 Difference]: With dead ends: 21155 [2021-11-23 17:45:24,823 INFO L226 Difference]: Without dead ends: 13727 [2021-11-23 17:45:24,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 301 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 17:45:24,831 INFO L933 BasicCegarLoop]: 874 mSDtfsCounter, 879 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 2320 mSolverCounterSat, 877 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 879 SdHoareTripleChecker+Valid, 1027 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 877 IncrementalHoareTripleChecker+Valid, 2320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 46.5s IncrementalHoareTripleChecker+Time [2021-11-23 17:45:24,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [879 Valid, 1027 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [877 Valid, 2320 Invalid, 0 Unknown, 0 Unchecked, 46.5s Time] [2021-11-23 17:45:24,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13727 states. [2021-11-23 17:45:25,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13727 to 13725. [2021-11-23 17:45:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13725 states, 13724 states have (on average 1.2105800058292042) internal successors, (16614), 13724 states have internal predecessors, (16614), 0 states have call successors, (0), 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 17:45:25,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13725 states to 13725 states and 16614 transitions. [2021-11-23 17:45:25,044 INFO L78 Accepts]: Start accepts. Automaton has 13725 states and 16614 transitions. Word has length 303 [2021-11-23 17:45:25,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:45:25,045 INFO L470 AbstractCegarLoop]: Abstraction has 13725 states and 16614 transitions. [2021-11-23 17:45:25,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 59.666666666666664) internal successors, (179), 2 states have internal predecessors, (179), 0 states have call successors, (0), 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 17:45:25,045 INFO L276 IsEmpty]: Start isEmpty. Operand 13725 states and 16614 transitions. [2021-11-23 17:45:25,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2021-11-23 17:45:25,054 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:45:25,054 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 17:45:25,072 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 17:45:25,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:45:25,269 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:45:25,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:45:25,270 INFO L85 PathProgramCache]: Analyzing trace with hash 1840688272, now seen corresponding path program 1 times [2021-11-23 17:45:25,271 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:45:25,271 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1752733737] [2021-11-23 17:45:25,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:25,272 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:45:25,272 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:45:25,272 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:45:25,274 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 17:45:25,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 17:45:25,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:26,657 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 307 proven. 88 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:45:26,657 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:45:28,810 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 307 proven. 88 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:45:28,810 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:45:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1752733737] [2021-11-23 17:45:28,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1752733737] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:45:28,810 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1933932091] [2021-11-23 17:45:28,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:45:28,811 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:45:28,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:45:28,812 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:45:28,816 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 17:45:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:45:29,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 17:45:29,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:45:31,591 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 272 trivial. 0 not checked. [2021-11-23 17:45:31,592 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:45:31,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1933932091] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:45:31,592 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:45:31,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [3, 3] total 9 [2021-11-23 17:45:31,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356294572] [2021-11-23 17:45:31,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:45:31,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 17:45:31,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:45:31,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 17:45:31,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:45:31,594 INFO L87 Difference]: Start difference. First operand 13725 states and 16614 transitions. Second operand has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 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 17:46:23,271 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.43s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 17:46:44,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:46:44,928 INFO L93 Difference]: Finished difference Result 31748 states and 39489 transitions. [2021-11-23 17:46:44,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 17:46:44,937 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 352 [2021-11-23 17:46:44,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:46:44,971 INFO L225 Difference]: With dead ends: 31748 [2021-11-23 17:46:44,972 INFO L226 Difference]: Without dead ends: 18812 [2021-11-23 17:46:44,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1053 GetRequests, 1046 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-11-23 17:46:44,984 INFO L933 BasicCegarLoop]: 1721 mSDtfsCounter, 1739 mSDsluCounter, 303 mSDsCounter, 0 mSdLazyCounter, 4221 mSolverCounterSat, 960 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 63.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1739 SdHoareTripleChecker+Valid, 2024 SdHoareTripleChecker+Invalid, 5181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 960 IncrementalHoareTripleChecker+Valid, 4221 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 73.1s IncrementalHoareTripleChecker+Time [2021-11-23 17:46:44,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1739 Valid, 2024 Invalid, 5181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [960 Valid, 4221 Invalid, 0 Unknown, 0 Unchecked, 73.1s Time] [2021-11-23 17:46:45,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18812 states. [2021-11-23 17:46:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18812 to 18458. [2021-11-23 17:46:45,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18458 states, 18457 states have (on average 1.1838326922035) internal successors, (21850), 18457 states have internal predecessors, (21850), 0 states have call successors, (0), 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 17:46:45,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18458 states to 18458 states and 21850 transitions. [2021-11-23 17:46:45,287 INFO L78 Accepts]: Start accepts. Automaton has 18458 states and 21850 transitions. Word has length 352 [2021-11-23 17:46:45,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:46:45,288 INFO L470 AbstractCegarLoop]: Abstraction has 18458 states and 21850 transitions. [2021-11-23 17:46:45,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 0 states have call successors, (0), 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 17:46:45,288 INFO L276 IsEmpty]: Start isEmpty. Operand 18458 states and 21850 transitions. [2021-11-23 17:46:45,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 359 [2021-11-23 17:46:45,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:46:45,299 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 17:46:45,308 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:45,517 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 17:46:45,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:46:45,709 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:46:45,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:46:45,709 INFO L85 PathProgramCache]: Analyzing trace with hash -54137365, now seen corresponding path program 1 times [2021-11-23 17:46:45,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:46:45,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [532825375] [2021-11-23 17:46:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:46:45,711 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:46:45,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:46:45,714 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:46:45,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 17:46:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:46:45,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:46:45,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:46:49,983 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 277 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:46:49,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:47:08,422 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 277 proven. 49 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-23 17:47:08,422 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:47:08,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [532825375] [2021-11-23 17:47:08,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [532825375] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:47:08,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1903893025] [2021-11-23 17:47:08,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:08,423 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:47:08,423 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:47:08,424 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:47:08,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Waiting until timeout for monitored process [2021-11-23 17:47:08,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:08,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 17:47:08,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 426 backedges. 336 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2021-11-23 17:47:09,280 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:47:09,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1903893025] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:47:09,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:47:09,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3, 3] total 7 [2021-11-23 17:47:09,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839819954] [2021-11-23 17:47:09,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:47:09,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 17:47:09,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:47:09,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 17:47:09,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:09,283 INFO L87 Difference]: Start difference. First operand 18458 states and 21850 transitions. Second operand has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:47:49,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 17:47:49,808 INFO L93 Difference]: Finished difference Result 45564 states and 54250 transitions. [2021-11-23 17:47:49,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 17:47:49,812 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 358 [2021-11-23 17:47:49,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 17:47:49,837 INFO L225 Difference]: With dead ends: 45564 [2021-11-23 17:47:49,838 INFO L226 Difference]: Without dead ends: 26319 [2021-11-23 17:47:49,854 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1071 GetRequests, 1066 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 17:47:49,855 INFO L933 BasicCegarLoop]: 1566 mSDtfsCounter, 1012 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2366 mSolverCounterSat, 820 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 33.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 1703 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 820 IncrementalHoareTripleChecker+Valid, 2366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.3s IncrementalHoareTripleChecker+Time [2021-11-23 17:47:49,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1012 Valid, 1703 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [820 Valid, 2366 Invalid, 0 Unknown, 0 Unchecked, 40.3s Time] [2021-11-23 17:47:49,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26319 states. [2021-11-23 17:47:50,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26319 to 26317. [2021-11-23 17:47:50,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26317 states, 26316 states have (on average 1.1331129350965192) internal successors, (29819), 26316 states have internal predecessors, (29819), 0 states have call successors, (0), 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 17:47:50,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26317 states to 26317 states and 29819 transitions. [2021-11-23 17:47:50,200 INFO L78 Accepts]: Start accepts. Automaton has 26317 states and 29819 transitions. Word has length 358 [2021-11-23 17:47:50,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 17:47:50,200 INFO L470 AbstractCegarLoop]: Abstraction has 26317 states and 29819 transitions. [2021-11-23 17:47:50,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 89.66666666666667) internal successors, (269), 3 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 17:47:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 26317 states and 29819 transitions. [2021-11-23 17:47:50,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 390 [2021-11-23 17:47:50,278 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 17:47:50,279 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 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 17:47:50,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (14)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:50,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 17:47:50,679 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 17:47:50,679 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 17:47:50,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 17:47:50,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1170359889, now seen corresponding path program 1 times [2021-11-23 17:47:50,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 17:47:50,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276830855] [2021-11-23 17:47:50,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:47:50,682 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 17:47:50,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 17:47:50,683 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 17:47:50,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 17:47:50,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:47:50,864 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:47:50,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:47:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 318 proven. 83 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:47:53,335 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 17:48:04,886 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 318 proven. 83 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-23 17:48:04,886 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 17:48:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276830855] [2021-11-23 17:48:04,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276830855] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 17:48:04,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [800780983] [2021-11-23 17:48:04,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 17:48:04,887 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 17:48:04,887 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 17:48:04,887 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 17:48:04,888 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81e52a5c-4d72-45fd-9fff-fac1a89d1a35/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (16)] Waiting until timeout for monitored process [2021-11-23 17:48:05,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 17:48:05,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 17:48:05,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 17:48:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 185 proven. 0 refuted. 0 times theorem prover too weak. 278 trivial. 0 not checked. [2021-11-23 17:48:07,484 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 17:48:07,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [800780983] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 17:48:07,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 17:48:07,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [4, 4] total 11 [2021-11-23 17:48:07,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86671014] [2021-11-23 17:48:07,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 17:48:07,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 17:48:07,486 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 17:48:07,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 17:48:07,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-11-23 17:48:07,486 INFO L87 Difference]: Start difference. First operand 26317 states and 29819 transitions. Second operand has 6 states, 6 states have (on average 32.666666666666664) internal successors, (196), 6 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)