./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/eca-rers2012/Problem18_label14.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_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/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_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/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_e69be578-e972-46a0-afe6-c93796bd5692/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 a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:24,114 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:24,116 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:24,168 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:24,169 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:24,175 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:24,178 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:24,183 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:24,186 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:24,194 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:24,195 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:24,197 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:24,198 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:24,201 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:24,204 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:24,211 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:24,212 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:24,215 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:24,217 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:24,222 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:24,228 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:24,230 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:24,233 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:24,234 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:24,241 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:24,241 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:24,242 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:24,244 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:24,245 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:24,246 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:24,247 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:24,248 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:24,250 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:24,252 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:24,253 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:24,253 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:24,254 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:24,254 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:24,255 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:24,256 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:24,256 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:24,257 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 16:45:24,306 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:24,306 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:24,307 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:24,307 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:24,314 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:24,315 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:24,315 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:24,315 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:24,316 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:24,316 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 16:45:24,317 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:24,317 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:24,318 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 16:45:24,318 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 16:45:24,318 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:24,319 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 16:45:24,319 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 16:45:24,319 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 16:45:24,320 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:24,320 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:24,320 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 16:45:24,320 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:24,321 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:24,321 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:24,321 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:24,321 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:24,323 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:24,323 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:24,323 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:24,324 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:24,324 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:24,324 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:24,325 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:24,325 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:24,325 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:24,325 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:24,326 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 16:45:24,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 16:45:24,326 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:24,326 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:24,326 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:24,327 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_e69be578-e972-46a0-afe6-c93796bd5692/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e [2021-11-23 16:45:24,621 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:24,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:24,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:24,659 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:24,660 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:24,661 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-11-23 16:45:24,716 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/6946b377f/273055d7bbc948e8b777ca1cfc2ba956/FLAG3b35fe351 [2021-11-23 16:45:25,501 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:25,501 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-11-23 16:45:25,533 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/6946b377f/273055d7bbc948e8b777ca1cfc2ba956/FLAG3b35fe351 [2021-11-23 16:45:26,026 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/6946b377f/273055d7bbc948e8b777ca1cfc2ba956 [2021-11-23 16:45:26,040 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:26,041 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:26,043 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:26,043 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:26,047 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:26,048 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:26" (1/1) ... [2021-11-23 16:45:26,050 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae8b0b5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:26, skipping insertion in model container [2021-11-23 16:45:26,051 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:26" (1/1) ... [2021-11-23 16:45:26,058 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:26,188 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:26,487 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_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c[5298,5311] [2021-11-23 16:45:27,226 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:27,235 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:27,266 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_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c[5298,5311] [2021-11-23 16:45:27,711 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:27,734 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:27,735 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27 WrapperNode [2021-11-23 16:45:27,735 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:27,736 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:27,736 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:27,736 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:27,744 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:27,825 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,074 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4132 [2021-11-23 16:45:28,075 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:28,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:28,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:28,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:28,086 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,165 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,168 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,283 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,361 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:28,363 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:28,363 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:28,363 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:28,364 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:27" (1/1) ... [2021-11-23 16:45:28,372 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:28,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:28,405 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:28,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:28,454 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 16:45:28,455 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:28,455 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:28,532 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:28,534 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:31,855 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:31,906 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder has thrown an exception: java.lang.UnsupportedOperationException: Set is immutable at de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaBuilder.addBranchEncoders(TransFormulaBuilder.java:170) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.parallelComposition(TransFormulaUtils.java:337) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.ParallelComposition.(ParallelComposition.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CodeBlockFactory.constructParallelComposition(CodeBlockFactory.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.composeParallel(CfgBuilder.java:1792) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder$LargeBlockEncoding.(CfgBuilder.java:1653) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.CfgBuilder.createIcfg(CfgBuilder.java:280) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.RCFGBuilderObserver.process(RCFGBuilderObserver.java:88) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.DFSTreeWalker.runObserver(DFSTreeWalker.java:65) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.runObserver(BaseWalker.java:93) at de.uni_freiburg.informatik.ultimate.core.coreplugin.modelwalker.BaseWalker.run(BaseWalker.java:86) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:167) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 16:45:31,918 INFO L158 Benchmark]: Toolchain (without parser) took 5873.65ms. Allocated memory was 113.2MB in the beginning and 343.9MB in the end (delta: 230.7MB). Free memory was 85.6MB in the beginning and 213.7MB in the end (delta: -128.1MB). Peak memory consumption was 164.2MB. Max. memory is 16.1GB. [2021-11-23 16:45:31,919 INFO L158 Benchmark]: CDTParser took 0.30ms. Allocated memory is still 81.8MB. Free memory was 59.6MB in the beginning and 59.5MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 16:45:31,921 INFO L158 Benchmark]: CACSL2BoogieTranslator took 1692.23ms. Allocated memory is still 113.2MB. Free memory was 85.2MB in the beginning and 55.3MB in the end (delta: 29.9MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. [2021-11-23 16:45:31,922 INFO L158 Benchmark]: Boogie Procedure Inliner took 339.13ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 38.0MB in the end (delta: 17.3MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. [2021-11-23 16:45:31,923 INFO L158 Benchmark]: Boogie Preprocessor took 285.86ms. Allocated memory was 113.2MB in the beginning and 201.3MB in the end (delta: 88.1MB). Free memory was 38.0MB in the beginning and 115.1MB in the end (delta: -77.1MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. [2021-11-23 16:45:31,924 INFO L158 Benchmark]: RCFGBuilder took 3551.62ms. Allocated memory was 201.3MB in the beginning and 343.9MB in the end (delta: 142.6MB). Free memory was 115.1MB in the beginning and 213.7MB in the end (delta: -98.5MB). Peak memory consumption was 105.0MB. Max. memory is 16.1GB. [2021-11-23 16:45:31,935 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.30ms. Allocated memory is still 81.8MB. Free memory was 59.6MB in the beginning and 59.5MB in the end (delta: 44.7kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 1692.23ms. Allocated memory is still 113.2MB. Free memory was 85.2MB in the beginning and 55.3MB in the end (delta: 29.9MB). Peak memory consumption was 71.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 339.13ms. Allocated memory is still 113.2MB. Free memory was 55.3MB in the beginning and 38.0MB in the end (delta: 17.3MB). Peak memory consumption was 32.3MB. Max. memory is 16.1GB. * Boogie Preprocessor took 285.86ms. Allocated memory was 113.2MB in the beginning and 201.3MB in the end (delta: 88.1MB). Free memory was 38.0MB in the beginning and 115.1MB in the end (delta: -77.1MB). Peak memory consumption was 20.6MB. Max. memory is 16.1GB. * RCFGBuilder took 3551.62ms. Allocated memory was 201.3MB in the beginning and 343.9MB in the end (delta: 142.6MB). Free memory was 115.1MB in the beginning and 213.7MB in the end (delta: -98.5MB). Peak memory consumption was 105.0MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: - ExceptionOrErrorResult: UnsupportedOperationException: Set is immutable de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: UnsupportedOperationException: Set is immutable: de.uni_freiburg.informatik.ultimate.util.datastructures.ImmutableSet.addAll(ImmutableSet.java:313) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 16:45:31,963 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/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_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/config/TaipanReach.xml -i ../../sv-benchmarks/c/eca-rers2012/Problem18_label14.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/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_e69be578-e972-46a0-afe6-c93796bd5692/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 a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e --- Real Ultimate output --- This is Ultimate 0.2.2-dev-6a47aea [2021-11-23 16:45:34,490 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 16:45:34,493 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 16:45:34,560 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 16:45:34,562 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 16:45:34,566 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 16:45:34,584 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 16:45:34,586 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 16:45:34,591 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 16:45:34,593 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 16:45:34,595 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 16:45:34,599 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 16:45:34,600 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 16:45:34,608 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 16:45:34,615 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 16:45:34,618 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 16:45:34,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 16:45:34,639 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 16:45:34,645 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 16:45:34,647 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 16:45:34,650 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 16:45:34,651 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 16:45:34,653 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 16:45:34,654 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 16:45:34,658 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 16:45:34,663 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 16:45:34,663 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 16:45:34,664 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 16:45:34,666 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 16:45:34,667 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 16:45:34,668 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 16:45:34,669 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 16:45:34,671 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 16:45:34,672 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 16:45:34,674 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 16:45:34,674 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 16:45:34,675 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 16:45:34,676 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 16:45:34,676 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 16:45:34,678 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 16:45:34,679 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 16:45:34,680 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 16:45:34,727 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 16:45:34,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 16:45:34,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 16:45:34,728 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 16:45:34,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 16:45:34,729 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 16:45:34,730 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 16:45:34,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 16:45:34,730 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 16:45:34,730 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 16:45:34,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 16:45:34,732 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 16:45:34,734 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 16:45:34,734 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 16:45:34,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 16:45:34,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 16:45:34,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 16:45:34,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 16:45:34,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 16:45:34,736 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 16:45:34,736 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 16:45:34,736 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 16:45:34,736 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 16:45:34,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 16:45:34,737 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 16:45:34,737 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 16:45:34,737 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 16:45:34,737 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 16:45:34,738 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 16:45:34,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:34,738 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 16:45:34,738 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 16:45:34,739 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 16:45:34,739 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 16:45:34,739 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 16:45:34,740 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 16:45:34,740 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 16:45:34,740 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 16:45:34,740 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_e69be578-e972-46a0-afe6-c93796bd5692/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a02231a91e38821a474a995aa0f6354f8b6e8aefa7ca1b1921ca101a19abba9e [2021-11-23 16:45:35,122 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 16:45:35,151 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 16:45:35,155 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 16:45:35,156 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 16:45:35,157 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 16:45:35,159 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/../../sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-11-23 16:45:35,239 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/d6036126b/2ab6ca19138348fdb077da98e96120e9/FLAGbbbc6b88a [2021-11-23 16:45:36,067 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 16:45:36,068 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c [2021-11-23 16:45:36,099 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/d6036126b/2ab6ca19138348fdb077da98e96120e9/FLAGbbbc6b88a [2021-11-23 16:45:36,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/data/d6036126b/2ab6ca19138348fdb077da98e96120e9 [2021-11-23 16:45:36,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 16:45:36,611 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 16:45:36,613 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:36,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 16:45:36,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 16:45:36,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:36,619 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@694a46ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:36, skipping insertion in model container [2021-11-23 16:45:36,619 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 04:45:36" (1/1) ... [2021-11-23 16:45:36,627 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 16:45:36,740 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 16:45:36,993 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_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c[5298,5311] [2021-11-23 16:45:38,063 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:38,077 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 16:45:38,114 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_e69be578-e972-46a0-afe6-c93796bd5692/sv-benchmarks/c/eca-rers2012/Problem18_label14.c[5298,5311] [2021-11-23 16:45:38,648 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 16:45:38,700 INFO L208 MainTranslator]: Completed translation [2021-11-23 16:45:38,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38 WrapperNode [2021-11-23 16:45:38,701 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 16:45:38,702 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:38,702 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 16:45:38,702 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 16:45:38,710 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:38,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:38,924 INFO L137 Inliner]: procedures = 16, calls = 10, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 4128 [2021-11-23 16:45:38,924 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 16:45:38,925 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 16:45:38,926 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 16:45:38,927 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 16:45:38,936 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:38,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:38,955 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:38,955 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:39,092 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:39,126 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:39,141 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:39,158 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 16:45:39,160 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 16:45:39,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 16:45:39,161 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 16:45:39,162 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (1/1) ... [2021-11-23 16:45:39,170 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 16:45:39,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:45:39,196 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 16:45:39,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 16:45:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 16:45:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 16:45:39,262 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 16:45:39,262 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 16:45:39,340 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 16:45:39,342 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 16:45:54,572 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 16:45:54,635 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 16:45:54,636 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-23 16:45:54,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:54 BoogieIcfgContainer [2021-11-23 16:45:54,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 16:45:54,641 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 16:45:54,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 16:45:54,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 16:45:54,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 04:45:36" (1/3) ... [2021-11-23 16:45:54,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e614bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:54, skipping insertion in model container [2021-11-23 16:45:54,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 04:45:38" (2/3) ... [2021-11-23 16:45:54,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e614bf8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 04:45:54, skipping insertion in model container [2021-11-23 16:45:54,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 04:45:54" (3/3) ... [2021-11-23 16:45:54,652 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem18_label14.c [2021-11-23 16:45:54,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 16:45:54,658 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-23 16:45:54,715 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 16:45:54,723 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 16:45:54,723 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-23 16:45:54,783 INFO L276 IsEmpty]: Start isEmpty. Operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 16:45:54,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 16:45:54,791 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:45:54,792 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] [2021-11-23 16:45:54,793 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:45:54,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:45:54,800 INFO L85 PathProgramCache]: Analyzing trace with hash 761214138, now seen corresponding path program 1 times [2021-11-23 16:45:54,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:45:54,819 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2013753702] [2021-11-23 16:45:54,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:45:54,820 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:45:54,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:45:54,823 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:45:54,831 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 16:45:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:45:54,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:45:54,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:45:55,225 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 16:45:55,225 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:45:55,230 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:45:55,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2013753702] [2021-11-23 16:45:55,231 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2013753702] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:45:55,231 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:45:55,232 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:45:55,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126952770] [2021-11-23 16:45:55,234 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:45:55,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:45:55,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:45:55,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:45:55,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:45:55,316 INFO L87 Difference]: Start difference. First operand has 757 states, 755 states have (on average 1.9125827814569536) internal successors, (1444), 756 states have internal predecessors, (1444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 16:46:15,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:15,327 INFO L93 Difference]: Finished difference Result 2205 states and 4266 transitions. [2021-11-23 16:46:15,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:15,330 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 50 [2021-11-23 16:46:15,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:15,362 INFO L225 Difference]: With dead ends: 2205 [2021-11-23 16:46:15,363 INFO L226 Difference]: Without dead ends: 1384 [2021-11-23 16:46:15,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 48 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 16:46:15,374 INFO L933 BasicCegarLoop]: 423 mSDtfsCounter, 662 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 2275 mSolverCounterSat, 481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 16.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 481 IncrementalHoareTripleChecker+Valid, 2275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:15,376 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [662 Valid, 432 Invalid, 2756 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [481 Valid, 2275 Invalid, 0 Unknown, 0 Unchecked, 19.8s Time] [2021-11-23 16:46:15,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1384 states. [2021-11-23 16:46:15,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1384 to 1384. [2021-11-23 16:46:15,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.6428054953000724) internal successors, (2272), 1383 states have internal predecessors, (2272), 0 states have call successors, (0), 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 16:46:15,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 2272 transitions. [2021-11-23 16:46:15,499 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 2272 transitions. Word has length 50 [2021-11-23 16:46:15,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:15,500 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 2272 transitions. [2021-11-23 16:46:15,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 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 16:46:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 2272 transitions. [2021-11-23 16:46:15,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 16:46:15,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:15,506 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, 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 16:46:15,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:15,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:15,719 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:15,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:15,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1110928118, now seen corresponding path program 1 times [2021-11-23 16:46:15,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:15,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1247420720] [2021-11-23 16:46:15,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:15,722 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:15,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:15,723 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:15,763 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 16:46:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:15,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:15,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:16,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:16,204 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:16,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1247420720] [2021-11-23 16:46:16,205 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1247420720] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:16,206 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:16,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:16,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456643779] [2021-11-23 16:46:16,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:16,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:16,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:16,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:16,215 INFO L87 Difference]: Start difference. First operand 1384 states and 2272 transitions. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:46:35,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:35,993 INFO L93 Difference]: Finished difference Result 4146 states and 6811 transitions. [2021-11-23 16:46:35,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:35,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 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 115 [2021-11-23 16:46:35,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:36,011 INFO L225 Difference]: With dead ends: 4146 [2021-11-23 16:46:36,012 INFO L226 Difference]: Without dead ends: 2764 [2021-11-23 16:46:36,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 113 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 16:46:36,016 INFO L933 BasicCegarLoop]: 586 mSDtfsCounter, 667 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1715 mSolverCounterSat, 918 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 667 SdHoareTripleChecker+Valid, 591 SdHoareTripleChecker+Invalid, 2633 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 918 IncrementalHoareTripleChecker+Valid, 1715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 19.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:36,016 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [667 Valid, 591 Invalid, 2633 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [918 Valid, 1715 Invalid, 0 Unknown, 0 Unchecked, 19.6s Time] [2021-11-23 16:46:36,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2764 states. [2021-11-23 16:46:36,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2764 to 2764. [2021-11-23 16:46:36,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2764 states, 2763 states have (on average 1.3785740137531668) internal successors, (3809), 2763 states have internal predecessors, (3809), 0 states have call successors, (0), 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 16:46:36,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2764 states to 2764 states and 3809 transitions. [2021-11-23 16:46:36,112 INFO L78 Accepts]: Start accepts. Automaton has 2764 states and 3809 transitions. Word has length 115 [2021-11-23 16:46:36,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:36,114 INFO L470 AbstractCegarLoop]: Abstraction has 2764 states and 3809 transitions. [2021-11-23 16:46:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 2 states have internal predecessors, (115), 0 states have call successors, (0), 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 16:46:36,116 INFO L276 IsEmpty]: Start isEmpty. Operand 2764 states and 3809 transitions. [2021-11-23 16:46:36,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-23 16:46:36,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:36,126 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, 1, 1, 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 16:46:36,139 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-23 16:46:36,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:36,335 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:36,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:36,335 INFO L85 PathProgramCache]: Analyzing trace with hash 572858430, now seen corresponding path program 1 times [2021-11-23 16:46:36,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:36,336 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1391437771] [2021-11-23 16:46:36,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:36,337 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:36,338 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:36,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 16:46:36,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:36,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:36,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:36,771 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:36,771 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:36,771 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:36,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1391437771] [2021-11-23 16:46:36,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1391437771] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:36,772 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:36,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:36,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857530162] [2021-11-23 16:46:36,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:36,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:36,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:36,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:36,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:36,774 INFO L87 Difference]: Start difference. First operand 2764 states and 3809 transitions. Second operand has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:46:58,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:46:58,302 INFO L93 Difference]: Finished difference Result 8286 states and 11422 transitions. [2021-11-23 16:46:58,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:46:58,304 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 118 [2021-11-23 16:46:58,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:46:58,335 INFO L225 Difference]: With dead ends: 8286 [2021-11-23 16:46:58,335 INFO L226 Difference]: Without dead ends: 5524 [2021-11-23 16:46:58,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 116 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 16:46:58,341 INFO L933 BasicCegarLoop]: 605 mSDtfsCounter, 627 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2231 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 611 SdHoareTripleChecker+Invalid, 2745 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 2231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:46:58,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 611 Invalid, 2745 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [514 Valid, 2231 Invalid, 0 Unknown, 0 Unchecked, 21.4s Time] [2021-11-23 16:46:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-11-23 16:46:58,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 5524. [2021-11-23 16:46:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5524 states, 5523 states have (on average 1.2513126923773312) internal successors, (6911), 5523 states have internal predecessors, (6911), 0 states have call successors, (0), 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 16:46:58,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5524 states to 5524 states and 6911 transitions. [2021-11-23 16:46:58,474 INFO L78 Accepts]: Start accepts. Automaton has 5524 states and 6911 transitions. Word has length 118 [2021-11-23 16:46:58,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:46:58,476 INFO L470 AbstractCegarLoop]: Abstraction has 5524 states and 6911 transitions. [2021-11-23 16:46:58,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.333333333333336) internal successors, (118), 2 states have internal predecessors, (118), 0 states have call successors, (0), 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 16:46:58,477 INFO L276 IsEmpty]: Start isEmpty. Operand 5524 states and 6911 transitions. [2021-11-23 16:46:58,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-23 16:46:58,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:46:58,485 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:46:58,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 16:46:58,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:46:58,697 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:46:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:46:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash 971902449, now seen corresponding path program 1 times [2021-11-23 16:46:58,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:46:58,700 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [905351392] [2021-11-23 16:46:58,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:46:58,701 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:46:58,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:46:58,702 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:46:58,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 16:46:58,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:46:58,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:46:58,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:46:59,236 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:46:59,236 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:46:59,236 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:46:59,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [905351392] [2021-11-23 16:46:59,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [905351392] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:46:59,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:46:59,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:46:59,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733007650] [2021-11-23 16:46:59,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:46:59,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:46:59,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:46:59,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:46:59,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:46:59,239 INFO L87 Difference]: Start difference. First operand 5524 states and 6911 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 16:47:14,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:14,559 INFO L93 Difference]: Finished difference Result 13116 states and 16083 transitions. [2021-11-23 16:47:14,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:14,560 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 16:47:14,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:14,594 INFO L225 Difference]: With dead ends: 13116 [2021-11-23 16:47:14,595 INFO L226 Difference]: Without dead ends: 7594 [2021-11-23 16:47:14,602 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 16:47:14,603 INFO L933 BasicCegarLoop]: 623 mSDtfsCounter, 623 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2032 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 629 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 2032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 15.2s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:14,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 629 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 2032 Invalid, 0 Unknown, 0 Unchecked, 15.2s Time] [2021-11-23 16:47:14,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7594 states. [2021-11-23 16:47:14,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7594 to 7594. [2021-11-23 16:47:14,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7594 states, 7593 states have (on average 1.1907019623337285) internal successors, (9041), 7593 states have internal predecessors, (9041), 0 states have call successors, (0), 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 16:47:14,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7594 states to 7594 states and 9041 transitions. [2021-11-23 16:47:14,815 INFO L78 Accepts]: Start accepts. Automaton has 7594 states and 9041 transitions. Word has length 136 [2021-11-23 16:47:14,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:14,817 INFO L470 AbstractCegarLoop]: Abstraction has 7594 states and 9041 transitions. [2021-11-23 16:47:14,817 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 16:47:14,817 INFO L276 IsEmpty]: Start isEmpty. Operand 7594 states and 9041 transitions. [2021-11-23 16:47:14,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 16:47:14,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:14,819 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:47:14,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:15,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:15,032 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:15,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:15,033 INFO L85 PathProgramCache]: Analyzing trace with hash 1941006660, now seen corresponding path program 1 times [2021-11-23 16:47:15,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:15,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [515504788] [2021-11-23 16:47:15,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:15,035 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:15,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:15,040 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:15,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 16:47:15,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:15,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:47:15,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:16,031 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:16,031 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:16,031 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [515504788] [2021-11-23 16:47:16,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [515504788] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:16,031 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:47:16,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-23 16:47:16,032 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907053202] [2021-11-23 16:47:16,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:16,033 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:47:16,033 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:16,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:47:16,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:16,033 INFO L87 Difference]: Start difference. First operand 7594 states and 9041 transitions. Second operand has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 16:47:30,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:30,743 INFO L93 Difference]: Finished difference Result 13806 states and 16658 transitions. [2021-11-23 16:47:30,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:47:30,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-23 16:47:30,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:30,777 INFO L225 Difference]: With dead ends: 13806 [2021-11-23 16:47:30,777 INFO L226 Difference]: Without dead ends: 8284 [2021-11-23 16:47:30,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:47:30,785 INFO L933 BasicCegarLoop]: 629 mSDtfsCounter, 600 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 2013 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 600 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 2018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 2013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:30,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [600 Valid, 635 Invalid, 2018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 2013 Invalid, 0 Unknown, 0 Unchecked, 14.6s Time] [2021-11-23 16:47:30,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8284 states. [2021-11-23 16:47:30,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8284 to 8284. [2021-11-23 16:47:30,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8284 states, 8283 states have (on average 1.1755402631896656) internal successors, (9737), 8283 states have internal predecessors, (9737), 0 states have call successors, (0), 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 16:47:31,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8284 states to 8284 states and 9737 transitions. [2021-11-23 16:47:31,006 INFO L78 Accepts]: Start accepts. Automaton has 8284 states and 9737 transitions. Word has length 143 [2021-11-23 16:47:31,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:47:31,006 INFO L470 AbstractCegarLoop]: Abstraction has 8284 states and 9737 transitions. [2021-11-23 16:47:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.666666666666664) internal successors, (143), 2 states have internal predecessors, (143), 0 states have call successors, (0), 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 16:47:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8284 states and 9737 transitions. [2021-11-23 16:47:31,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2021-11-23 16:47:31,012 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:47:31,014 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 16:47:31,035 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 16:47:31,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:47:31,228 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:47:31,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:47:31,230 INFO L85 PathProgramCache]: Analyzing trace with hash 87701597, now seen corresponding path program 1 times [2021-11-23 16:47:31,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:47:31,234 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1360419471] [2021-11-23 16:47:31,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:31,235 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:47:31,235 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:47:31,236 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:47:31,250 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 16:47:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:31,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:47:31,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:33,133 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 50 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:33,133 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:34,910 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 50 proven. 137 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:34,910 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:47:34,910 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1360419471] [2021-11-23 16:47:34,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1360419471] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:34,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1816573937] [2021-11-23 16:47:34,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:34,911 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:47:34,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:47:34,922 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:47:34,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-11-23 16:47:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:35,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:47:35,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:36,294 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:36,294 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:47:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 139 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:37,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1816573937] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:47:37,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431284228] [2021-11-23 16:47:37,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:47:37,412 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 16:47:37,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 [2021-11-23 16:47:37,416 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 16:47:37,436 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 16:47:37,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:47:37,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:47:37,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:47:39,148 INFO L134 CoverageAnalysis]: Checked inductivity of 187 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 16:47:39,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:47:39,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431284228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:47:39,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 4 imperfect interpolant sequences. [2021-11-23 16:47:39,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 4, 4, 4] total 9 [2021-11-23 16:47:39,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364678486] [2021-11-23 16:47:39,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:47:39,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:47:39,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:47:39,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:47:39,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:47:39,152 INFO L87 Difference]: Start difference. First operand 8284 states and 9737 transitions. Second operand has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 16:47:59,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:47:59,897 INFO L93 Difference]: Finished difference Result 13912 states and 16753 transitions. [2021-11-23 16:47:59,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:47:59,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 325 [2021-11-23 16:47:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:47:59,926 INFO L225 Difference]: With dead ends: 13912 [2021-11-23 16:47:59,926 INFO L226 Difference]: Without dead ends: 6904 [2021-11-23 16:47:59,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1620 GetRequests, 1613 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-11-23 16:47:59,933 INFO L933 BasicCegarLoop]: 527 mSDtfsCounter, 601 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2579 mSolverCounterSat, 712 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 18.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 601 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 3291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 712 IncrementalHoareTripleChecker+Valid, 2579 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:47:59,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [601 Valid, 539 Invalid, 3291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [712 Valid, 2579 Invalid, 0 Unknown, 0 Unchecked, 20.6s Time] [2021-11-23 16:47:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6904 states. [2021-11-23 16:48:00,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6904 to 6904. [2021-11-23 16:48:00,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6904 states, 6903 states have (on average 1.1131392148341301) internal successors, (7684), 6903 states have internal predecessors, (7684), 0 states have call successors, (0), 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 16:48:00,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6904 states to 6904 states and 7684 transitions. [2021-11-23 16:48:00,079 INFO L78 Accepts]: Start accepts. Automaton has 6904 states and 7684 transitions. Word has length 325 [2021-11-23 16:48:00,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:00,080 INFO L470 AbstractCegarLoop]: Abstraction has 6904 states and 7684 transitions. [2021-11-23 16:48:00,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 81.25) internal successors, (325), 3 states have internal predecessors, (325), 0 states have call successors, (0), 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 16:48:00,081 INFO L276 IsEmpty]: Start isEmpty. Operand 6904 states and 7684 transitions. [2021-11-23 16:48:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 951 [2021-11-23 16:48:00,113 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:00,115 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:00,155 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:00,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (8)] Ended with exit code 0 [2021-11-23 16:48:00,543 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:00,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/z3 -smt2 -in SMTLIB2_COMPLIANT=true,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:00,735 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:00,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:00,735 INFO L85 PathProgramCache]: Analyzing trace with hash 1191218921, now seen corresponding path program 1 times [2021-11-23 16:48:00,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:00,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1377614922] [2021-11-23 16:48:00,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:00,751 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:00,751 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:00,752 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:00,770 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-23 16:48:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:01,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:48:01,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:03,712 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 143 proven. 172 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:48:03,713 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:48:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 612 backedges. 315 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:48:05,233 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:05,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1377614922] [2021-11-23 16:48:05,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1377614922] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:48:05,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:48:05,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-11-23 16:48:05,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577548144] [2021-11-23 16:48:05,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:05,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:48:05,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:05,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:48:05,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:05,237 INFO L87 Difference]: Start difference. First operand 6904 states and 7684 transitions. Second operand has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 16:48:35,288 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.26s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:48:45,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:48:45,482 INFO L93 Difference]: Finished difference Result 16566 states and 18841 transitions. [2021-11-23 16:48:45,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:48:45,485 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 950 [2021-11-23 16:48:45,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:48:45,500 INFO L225 Difference]: With dead ends: 16566 [2021-11-23 16:48:45,500 INFO L226 Difference]: Without dead ends: 11044 [2021-11-23 16:48:45,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1898 GetRequests, 1895 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 16:48:45,505 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 630 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 1799 mSolverCounterSat, 361 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 37.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 630 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 2160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 361 IncrementalHoareTripleChecker+Valid, 1799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 40.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:48:45,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [630 Valid, 213 Invalid, 2160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [361 Valid, 1799 Invalid, 0 Unknown, 0 Unchecked, 40.1s Time] [2021-11-23 16:48:45,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11044 states. [2021-11-23 16:48:45,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11044 to 11044. [2021-11-23 16:48:45,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11044 states, 11043 states have (on average 1.0991578375441455) internal successors, (12138), 11043 states have internal predecessors, (12138), 0 states have call successors, (0), 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 16:48:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11044 states to 11044 states and 12138 transitions. [2021-11-23 16:48:45,686 INFO L78 Accepts]: Start accepts. Automaton has 11044 states and 12138 transitions. Word has length 950 [2021-11-23 16:48:45,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:48:45,689 INFO L470 AbstractCegarLoop]: Abstraction has 11044 states and 12138 transitions. [2021-11-23 16:48:45,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 218.0) internal successors, (654), 3 states have internal predecessors, (654), 0 states have call successors, (0), 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 16:48:45,690 INFO L276 IsEmpty]: Start isEmpty. Operand 11044 states and 12138 transitions. [2021-11-23 16:48:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-11-23 16:48:45,732 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:48:45,733 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:48:45,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-23 16:48:45,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,946 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:48:45,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:48:45,947 INFO L85 PathProgramCache]: Analyzing trace with hash 653418828, now seen corresponding path program 1 times [2021-11-23 16:48:45,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:48:45,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [509896862] [2021-11-23 16:48:45,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:48:45,951 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:48:45,951 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:48:45,952 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:48:45,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 16:48:46,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:48:46,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 1016 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:48:46,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:48:49,454 INFO L134 CoverageAnalysis]: Checked inductivity of 626 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:48:49,455 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:48:49,455 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:48:49,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [509896862] [2021-11-23 16:48:49,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [509896862] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:48:49,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:48:49,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:48:49,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104135487] [2021-11-23 16:48:49,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:48:49,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:48:49,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:48:49,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:48:49,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:48:49,458 INFO L87 Difference]: Start difference. First operand 11044 states and 12138 transitions. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:49:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:07,530 INFO L93 Difference]: Finished difference Result 23466 states and 25813 transitions. [2021-11-23 16:49:07,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:07,538 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 957 [2021-11-23 16:49:07,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:07,566 INFO L225 Difference]: With dead ends: 23466 [2021-11-23 16:49:07,566 INFO L226 Difference]: Without dead ends: 13804 [2021-11-23 16:49:07,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 956 GetRequests, 954 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:07,576 INFO L933 BasicCegarLoop]: 372 mSDtfsCounter, 776 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 15.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 3765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:07,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 385 Invalid, 3765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 17.9s Time] [2021-11-23 16:49:07,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-11-23 16:49:07,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-11-23 16:49:07,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.0843294935883503) internal successors, (14967), 13803 states have internal predecessors, (14967), 0 states have call successors, (0), 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 16:49:07,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 14967 transitions. [2021-11-23 16:49:07,817 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 14967 transitions. Word has length 957 [2021-11-23 16:49:07,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:07,819 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 14967 transitions. [2021-11-23 16:49:07,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:49:07,819 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 14967 transitions. [2021-11-23 16:49:07,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 965 [2021-11-23 16:49:07,830 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:07,833 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:07,851 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 16:49:08,047 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:08,048 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:08,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:08,050 INFO L85 PathProgramCache]: Analyzing trace with hash -472875325, now seen corresponding path program 1 times [2021-11-23 16:49:08,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:08,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839654899] [2021-11-23 16:49:08,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:08,057 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:08,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:08,058 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:08,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-23 16:49:08,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 1023 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 16:49:08,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:11,571 INFO L134 CoverageAnalysis]: Checked inductivity of 633 backedges. 329 proven. 0 refuted. 0 times theorem prover too weak. 304 trivial. 0 not checked. [2021-11-23 16:49:11,571 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:49:11,572 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:11,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839654899] [2021-11-23 16:49:11,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1839654899] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:49:11,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:49:11,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:49:11,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239819308] [2021-11-23 16:49:11,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:11,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:49:11,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:11,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:49:11,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:11,576 INFO L87 Difference]: Start difference. First operand 13804 states and 14967 transitions. Second operand has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:49:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:49:28,561 INFO L93 Difference]: Finished difference Result 26226 states and 28548 transitions. [2021-11-23 16:49:28,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:49:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 964 [2021-11-23 16:49:28,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:49:28,587 INFO L225 Difference]: With dead ends: 26226 [2021-11-23 16:49:28,587 INFO L226 Difference]: Without dead ends: 13804 [2021-11-23 16:49:28,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 963 GetRequests, 961 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-23 16:49:28,599 INFO L933 BasicCegarLoop]: 351 mSDtfsCounter, 780 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 3013 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 780 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 3083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 3013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.8s IncrementalHoareTripleChecker+Time [2021-11-23 16:49:28,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [780 Valid, 363 Invalid, 3083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 3013 Invalid, 0 Unknown, 0 Unchecked, 16.8s Time] [2021-11-23 16:49:28,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13804 states. [2021-11-23 16:49:28,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13804 to 13804. [2021-11-23 16:49:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13804 states, 13803 states have (on average 1.0838948054770703) internal successors, (14961), 13803 states have internal predecessors, (14961), 0 states have call successors, (0), 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 16:49:28,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13804 states to 13804 states and 14961 transitions. [2021-11-23 16:49:28,901 INFO L78 Accepts]: Start accepts. Automaton has 13804 states and 14961 transitions. Word has length 964 [2021-11-23 16:49:28,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:49:28,902 INFO L470 AbstractCegarLoop]: Abstraction has 13804 states and 14961 transitions. [2021-11-23 16:49:28,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 165.25) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:49:28,903 INFO L276 IsEmpty]: Start isEmpty. Operand 13804 states and 14961 transitions. [2021-11-23 16:49:28,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1097 [2021-11-23 16:49:28,930 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:49:28,934 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:49:28,951 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (12)] Ended with exit code 0 [2021-11-23 16:49:29,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:49:29,149 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:49:29,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:49:29,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1225193285, now seen corresponding path program 1 times [2021-11-23 16:49:29,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:49:29,156 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2078503156] [2021-11-23 16:49:29,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:49:29,157 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:49:29,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:49:29,165 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:49:29,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-23 16:49:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:49:29,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 1165 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 16:49:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:49:36,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 191 proven. 556 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:49:36,515 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:49:39,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1044 backedges. 469 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 16:49:39,559 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:49:39,560 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2078503156] [2021-11-23 16:49:39,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2078503156] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:49:39,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:49:39,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 6 [2021-11-23 16:49:39,561 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945015906] [2021-11-23 16:49:39,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:49:39,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:49:39,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:49:39,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:49:39,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:49:39,565 INFO L87 Difference]: Start difference. First operand 13804 states and 14961 transitions. Second operand has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:50:04,229 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.55s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:50:21,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:21,357 INFO L93 Difference]: Finished difference Result 32436 states and 35578 transitions. [2021-11-23 16:50:21,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:21,359 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 1096 [2021-11-23 16:50:21,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:21,399 INFO L225 Difference]: With dead ends: 32436 [2021-11-23 16:50:21,399 INFO L226 Difference]: Without dead ends: 20014 [2021-11-23 16:50:21,412 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2190 GetRequests, 2186 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-23 16:50:21,413 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 623 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 1722 mSolverCounterSat, 659 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 38.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 659 IncrementalHoareTripleChecker+Valid, 1722 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 41.6s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:21,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 54 Invalid, 2381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [659 Valid, 1722 Invalid, 0 Unknown, 0 Unchecked, 41.6s Time] [2021-11-23 16:50:21,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20014 states. [2021-11-23 16:50:21,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20014 to 20014. [2021-11-23 16:50:21,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20014 states, 20013 states have (on average 1.0902913106480787) internal successors, (21820), 20013 states have internal predecessors, (21820), 0 states have call successors, (0), 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 16:50:21,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20014 states to 20014 states and 21820 transitions. [2021-11-23 16:50:21,820 INFO L78 Accepts]: Start accepts. Automaton has 20014 states and 21820 transitions. Word has length 1096 [2021-11-23 16:50:21,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:21,822 INFO L470 AbstractCegarLoop]: Abstraction has 20014 states and 21820 transitions. [2021-11-23 16:50:21,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 220.33333333333334) internal successors, (661), 3 states have internal predecessors, (661), 0 states have call successors, (0), 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 16:50:21,823 INFO L276 IsEmpty]: Start isEmpty. Operand 20014 states and 21820 transitions. [2021-11-23 16:50:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1111 [2021-11-23 16:50:21,839 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:21,840 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:21,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:22,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:22,058 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:22,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:22,058 INFO L85 PathProgramCache]: Analyzing trace with hash 28746146, now seen corresponding path program 1 times [2021-11-23 16:50:22,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:22,064 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [267908886] [2021-11-23 16:50:22,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:22,064 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:22,064 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:22,065 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:22,073 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 16:50:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:22,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:50:22,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:23,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1086 backedges. 191 proven. 0 refuted. 0 times theorem prover too weak. 895 trivial. 0 not checked. [2021-11-23 16:50:23,933 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:50:23,933 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:23,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [267908886] [2021-11-23 16:50:23,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [267908886] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:50:23,933 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:50:23,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:50:23,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141559681] [2021-11-23 16:50:23,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:23,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:50:23,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:23,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:50:23,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:50:23,936 INFO L87 Difference]: Start difference. First operand 20014 states and 21820 transitions. Second operand has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 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 16:50:41,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:50:41,568 INFO L93 Difference]: Finished difference Result 46236 states and 50628 transitions. [2021-11-23 16:50:41,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:50:41,571 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 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 1110 [2021-11-23 16:50:41,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:50:41,606 INFO L225 Difference]: With dead ends: 46236 [2021-11-23 16:50:41,606 INFO L226 Difference]: Without dead ends: 26914 [2021-11-23 16:50:41,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1109 GetRequests, 1108 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 16:50:41,618 INFO L933 BasicCegarLoop]: 1048 mSDtfsCounter, 643 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1971 mSolverCounterSat, 255 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1055 SdHoareTripleChecker+Invalid, 2226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 255 IncrementalHoareTripleChecker+Valid, 1971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2021-11-23 16:50:41,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [643 Valid, 1055 Invalid, 2226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [255 Valid, 1971 Invalid, 0 Unknown, 0 Unchecked, 17.4s Time] [2021-11-23 16:50:41,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-11-23 16:50:41,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 26914. [2021-11-23 16:50:41,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26914 states, 26913 states have (on average 1.0807788057815926) internal successors, (29087), 26913 states have internal predecessors, (29087), 0 states have call successors, (0), 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 16:50:42,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26914 states to 26914 states and 29087 transitions. [2021-11-23 16:50:42,014 INFO L78 Accepts]: Start accepts. Automaton has 26914 states and 29087 transitions. Word has length 1110 [2021-11-23 16:50:42,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:50:42,016 INFO L470 AbstractCegarLoop]: Abstraction has 26914 states and 29087 transitions. [2021-11-23 16:50:42,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 189.66666666666666) internal successors, (569), 3 states have internal predecessors, (569), 0 states have call successors, (0), 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 16:50:42,016 INFO L276 IsEmpty]: Start isEmpty. Operand 26914 states and 29087 transitions. [2021-11-23 16:50:42,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1190 [2021-11-23 16:50:42,121 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:50:42,122 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:50:42,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-23 16:50:42,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:50:42,323 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:50:42,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:50:42,324 INFO L85 PathProgramCache]: Analyzing trace with hash -588787132, now seen corresponding path program 1 times [2021-11-23 16:50:42,332 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:50:42,332 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [152511472] [2021-11-23 16:50:42,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:50:42,332 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:50:42,333 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:50:42,347 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:50:42,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-23 16:50:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:50:42,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 1270 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-23 16:50:42,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:50:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 604 proven. 493 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-23 16:50:46,081 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:50:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1442 backedges. 1097 proven. 0 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2021-11-23 16:50:58,760 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:50:58,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [152511472] [2021-11-23 16:50:58,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [152511472] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:50:58,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 16:50:58,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2021-11-23 16:50:58,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890907327] [2021-11-23 16:50:58,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:50:58,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 16:50:58,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:50:58,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 16:50:58,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:50:58,763 INFO L87 Difference]: Start difference. First operand 26914 states and 29087 transitions. Second operand has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 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 16:51:16,908 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:27,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:35,491 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:37,687 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.75s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:39,189 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:41,512 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:45,341 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:46,946 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.60s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:50,134 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:53,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:51:59,148 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.28s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:01,153 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:07,050 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:08,595 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.29s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:11,699 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:14,048 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:16,257 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.00s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:24,828 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.31s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:27,964 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:31,186 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:33,584 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:37,417 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.62s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:39,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:41,841 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.67s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:48,109 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:53,324 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.66s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:52:57,662 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:08,149 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:11,138 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:12,875 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:14,845 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:16,320 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.48s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:19,304 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.76s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:23,094 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:25,441 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:29,474 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.93s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:32,335 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:33,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:36,407 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:43,434 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.88s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:45,467 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:53:49,206 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:01,963 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.05s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:04,361 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:09,046 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:11,681 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.19s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:18,521 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:20,765 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:24,984 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:26,697 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.71s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:28,782 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:30,752 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.34s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:33,158 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:34,585 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.04s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:37,649 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:39,771 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:47,117 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.14s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:51,228 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:53,959 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:55,453 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.44s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:54:59,452 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:02,623 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:07,381 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.07s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:11,844 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.16s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:15,015 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.37s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:19,719 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.38s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:21,559 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:25,351 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.57s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:27,274 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.03s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:30,843 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.25s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:35,781 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.80s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:37,056 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.21s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:40,244 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:46,165 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.98s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:48,986 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.02s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:51,016 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.03s for a HTC check with result UNKNOWN. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:55:51,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:55:51,017 INFO L93 Difference]: Finished difference Result 69006 states and 75047 transitions. [2021-11-23 16:55:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 16:55:51,024 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 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 1189 [2021-11-23 16:55:51,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:55:51,080 INFO L225 Difference]: With dead ends: 69006 [2021-11-23 16:55:51,080 INFO L226 Difference]: Without dead ends: 43474 [2021-11-23 16:55:51,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2376 GetRequests, 2371 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-23 16:55:51,145 INFO L933 BasicCegarLoop]: 194 mSDtfsCounter, 1261 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 3442 mSolverCounterSat, 610 mSolverCounterUnsat, 18 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 281.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1261 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 4070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 610 IncrementalHoareTripleChecker+Valid, 3442 IncrementalHoareTripleChecker+Invalid, 18 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 291.9s IncrementalHoareTripleChecker+Time [2021-11-23 16:55:51,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1261 Valid, 205 Invalid, 4070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [610 Valid, 3442 Invalid, 18 Unknown, 0 Unchecked, 291.9s Time] [2021-11-23 16:55:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43474 states. [2021-11-23 16:55:51,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43474 to 39334. [2021-11-23 16:55:51,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39334 states, 39333 states have (on average 1.0856278443037652) internal successors, (42701), 39333 states have internal predecessors, (42701), 0 states have call successors, (0), 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 16:55:51,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39334 states to 39334 states and 42701 transitions. [2021-11-23 16:55:51,997 INFO L78 Accepts]: Start accepts. Automaton has 39334 states and 42701 transitions. Word has length 1189 [2021-11-23 16:55:52,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:55:52,000 INFO L470 AbstractCegarLoop]: Abstraction has 39334 states and 42701 transitions. [2021-11-23 16:55:52,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 211.5) internal successors, (846), 4 states have internal predecessors, (846), 0 states have call successors, (0), 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 16:55:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 39334 states and 42701 transitions. [2021-11-23 16:55:52,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1233 [2021-11-23 16:55:52,067 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:55:52,068 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:55:52,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-23 16:55:52,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:55:52,269 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:55:52,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:55:52,269 INFO L85 PathProgramCache]: Analyzing trace with hash -639333345, now seen corresponding path program 1 times [2021-11-23 16:55:52,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:55:52,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1024933332] [2021-11-23 16:55:52,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:55:52,274 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:55:52,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:55:52,279 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:55:52,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-23 16:55:52,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:55:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 1328 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:55:52,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:55:54,620 INFO L134 CoverageAnalysis]: Checked inductivity of 1756 backedges. 1018 proven. 0 refuted. 0 times theorem prover too weak. 738 trivial. 0 not checked. [2021-11-23 16:55:54,620 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:55:54,620 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:55:54,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1024933332] [2021-11-23 16:55:54,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1024933332] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:55:54,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:55:54,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:55:54,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17293033] [2021-11-23 16:55:54,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:55:54,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:55:54,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:55:54,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:55:54,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:55:54,623 INFO L87 Difference]: Start difference. First operand 39334 states and 42701 transitions. Second operand has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 16:56:11,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:11,015 INFO L93 Difference]: Finished difference Result 85566 states and 93378 transitions. [2021-11-23 16:56:11,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:11,018 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 1232 [2021-11-23 16:56:11,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:11,066 INFO L225 Difference]: With dead ends: 85566 [2021-11-23 16:56:11,066 INFO L226 Difference]: Without dead ends: 47614 [2021-11-23 16:56:11,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1231 GetRequests, 1230 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 16:56:11,084 INFO L933 BasicCegarLoop]: 992 mSDtfsCounter, 609 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1884 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 13.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 609 SdHoareTripleChecker+Valid, 999 SdHoareTripleChecker+Invalid, 2182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 1884 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 16.1s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:11,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [609 Valid, 999 Invalid, 2182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 1884 Invalid, 0 Unknown, 0 Unchecked, 16.1s Time] [2021-11-23 16:56:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47614 states. [2021-11-23 16:56:11,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47614 to 44854. [2021-11-23 16:56:11,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44854 states, 44853 states have (on average 1.0836287427819766) internal successors, (48604), 44853 states have internal predecessors, (48604), 0 states have call successors, (0), 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 16:56:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44854 states to 44854 states and 48604 transitions. [2021-11-23 16:56:11,919 INFO L78 Accepts]: Start accepts. Automaton has 44854 states and 48604 transitions. Word has length 1232 [2021-11-23 16:56:11,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:11,920 INFO L470 AbstractCegarLoop]: Abstraction has 44854 states and 48604 transitions. [2021-11-23 16:56:11,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.0) internal successors, (684), 3 states have internal predecessors, (684), 0 states have call successors, (0), 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 16:56:11,921 INFO L276 IsEmpty]: Start isEmpty. Operand 44854 states and 48604 transitions. [2021-11-23 16:56:11,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-11-23 16:56:11,949 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:11,951 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:11,968 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (16)] Ended with exit code 0 [2021-11-23 16:56:12,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,165 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:12,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:12,166 INFO L85 PathProgramCache]: Analyzing trace with hash 728909262, now seen corresponding path program 1 times [2021-11-23 16:56:12,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:12,172 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [902009099] [2021-11-23 16:56:12,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:12,172 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:12,172 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:12,173 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:12,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 16:56:12,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:12,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 1369 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 16:56:12,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:14,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1492 backedges. 193 proven. 0 refuted. 0 times theorem prover too weak. 1299 trivial. 0 not checked. [2021-11-23 16:56:14,388 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 16:56:14,388 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:14,389 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [902009099] [2021-11-23 16:56:14,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [902009099] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 16:56:14,389 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 16:56:14,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 16:56:14,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145216830] [2021-11-23 16:56:14,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:56:14,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 16:56:14,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:56:14,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 16:56:14,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 16:56:14,391 INFO L87 Difference]: Start difference. First operand 44854 states and 48604 transitions. Second operand has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 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 16:56:32,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 16:56:32,035 INFO L93 Difference]: Finished difference Result 93156 states and 101568 transitions. [2021-11-23 16:56:32,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 16:56:32,036 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 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 1297 [2021-11-23 16:56:32,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 16:56:32,084 INFO L225 Difference]: With dead ends: 93156 [2021-11-23 16:56:32,084 INFO L226 Difference]: Without dead ends: 49684 [2021-11-23 16:56:32,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 1296 GetRequests, 1295 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 16:56:32,099 INFO L933 BasicCegarLoop]: 1044 mSDtfsCounter, 644 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1949 mSolverCounterSat, 271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 14.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 644 SdHoareTripleChecker+Valid, 1051 SdHoareTripleChecker+Invalid, 2220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 271 IncrementalHoareTripleChecker+Valid, 1949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 17.3s IncrementalHoareTripleChecker+Time [2021-11-23 16:56:32,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [644 Valid, 1051 Invalid, 2220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [271 Valid, 1949 Invalid, 0 Unknown, 0 Unchecked, 17.3s Time] [2021-11-23 16:56:32,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49684 states. [2021-11-23 16:56:32,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49684 to 48994. [2021-11-23 16:56:32,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48994 states, 48993 states have (on average 1.0774804563917295) internal successors, (52789), 48993 states have internal predecessors, (52789), 0 states have call successors, (0), 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 16:56:32,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48994 states to 48994 states and 52789 transitions. [2021-11-23 16:56:32,882 INFO L78 Accepts]: Start accepts. Automaton has 48994 states and 52789 transitions. Word has length 1297 [2021-11-23 16:56:32,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 16:56:32,884 INFO L470 AbstractCegarLoop]: Abstraction has 48994 states and 52789 transitions. [2021-11-23 16:56:32,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 190.0) internal successors, (570), 3 states have internal predecessors, (570), 0 states have call successors, (0), 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 16:56:32,885 INFO L276 IsEmpty]: Start isEmpty. Operand 48994 states and 52789 transitions. [2021-11-23 16:56:32,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-11-23 16:56:32,908 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 16:56:32,909 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 16:56:32,927 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (17)] Forceful destruction successful, exit code 0 [2021-11-23 16:56:33,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 [2021-11-23 16:56:33,125 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 16:56:33,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 16:56:33,125 INFO L85 PathProgramCache]: Analyzing trace with hash -121806671, now seen corresponding path program 1 times [2021-11-23 16:56:33,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 16:56:33,134 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [639682553] [2021-11-23 16:56:33,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:33,135 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 16:56:33,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat [2021-11-23 16:56:33,135 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 16:56:33,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 16:56:33,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:33,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 16:56:33,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:37,472 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 0 proven. 1456 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:56:37,472 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:56:43,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 1082 proven. 96 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 16:56:43,603 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 16:56:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [639682553] [2021-11-23 16:56:43,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [639682553] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 16:56:43,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1752009443] [2021-11-23 16:56:43,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 16:56:43,604 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 16:56:43,604 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 [2021-11-23 16:56:43,607 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 16:56:43,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e69be578-e972-46a0-afe6-c93796bd5692/bin/utaipan-fb15Y9Yzbl/cvc4 --incremental --print-success --lang smt (19)] Waiting until timeout for monitored process [2021-11-23 16:56:44,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 16:56:44,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 1377 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-23 16:56:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 16:56:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 0 proven. 1456 refuted. 0 times theorem prover too weak. 297 trivial. 0 not checked. [2021-11-23 16:56:48,732 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 16:57:00,842 INFO L134 CoverageAnalysis]: Checked inductivity of 1753 backedges. 1178 proven. 0 refuted. 0 times theorem prover too weak. 575 trivial. 0 not checked. [2021-11-23 16:57:00,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1752009443] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 16:57:00,842 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 16:57:00,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5, 6] total 13 [2021-11-23 16:57:00,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265199632] [2021-11-23 16:57:00,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 16:57:00,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 16:57:00,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 16:57:00,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 16:57:00,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-11-23 16:57:00,847 INFO L87 Difference]: Start difference. First operand 48994 states and 52789 transitions. Second operand has 5 states, 5 states have (on average 172.4) internal successors, (862), 5 states have internal predecessors, (862), 0 states have call successors, (0), 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 16:57:24,435 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.70s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:30,854 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.99s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers [] [2021-11-23 16:57:38,456 WARN L534 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.24s for a HTC check with result VALID. Formula has sorts [Bool, BitVec], hasArrays=false, hasNonlinArith=false, quantifiers []