./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 63182f13 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF --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 b59248e26671131ba5a1485c53f1a9d7532ad734408c4cd915dfefae46656687 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:29,458 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:29,461 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:29,523 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:29,524 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:29,525 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:29,527 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:29,529 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:29,531 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:29,532 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:29,534 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:29,535 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:29,536 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:29,537 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:29,539 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:29,540 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:29,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:29,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:29,546 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:29,549 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:29,551 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:29,553 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:29,554 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:29,555 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:29,559 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:29,560 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:29,560 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:29,562 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:29,562 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:29,564 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:29,564 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:29,565 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:29,566 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:29,567 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:29,568 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:29,569 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:29,570 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:29,570 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:29,571 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:29,572 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:29,573 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:29,574 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-13 01:27:29,610 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:29,610 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:29,612 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:29,613 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:29,613 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:29,613 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:29,614 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:29,614 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-13 01:27:29,620 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:29,621 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:29,622 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-13 01:27:29,622 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-13 01:27:29,622 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:29,623 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-13 01:27:29,623 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-13 01:27:29,623 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-13 01:27:29,624 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:29,625 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:27:29,625 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-13 01:27:29,625 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:27:29,625 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:29,626 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:29,626 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:29,626 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:29,626 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:29,627 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:27:29,627 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:29,627 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:29,628 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:29,629 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:29,629 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:29,630 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:29,630 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:29,630 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:29,631 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:29,631 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-13 01:27:29,631 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-13 01:27:29,631 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:29,632 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:29,632 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:29,632 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b59248e26671131ba5a1485c53f1a9d7532ad734408c4cd915dfefae46656687 [2021-11-13 01:27:29,933 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:27:29,960 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:27:29,962 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:27:29,964 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:27:29,965 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:27:29,966 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:27:30,057 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/c8d6f08a7/8db7535211394d7c8f96b5cb6b966cc7/FLAG1e7b5bf41 [2021-11-13 01:27:31,043 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:27:31,044 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:27:31,087 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/c8d6f08a7/8db7535211394d7c8f96b5cb6b966cc7/FLAG1e7b5bf41 [2021-11-13 01:27:31,382 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/c8d6f08a7/8db7535211394d7c8f96b5cb6b966cc7 [2021-11-13 01:27:31,384 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:27:31,386 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:27:31,389 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:31,390 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:27:31,393 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:27:31,394 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,395 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cee09d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:31, skipping insertion in model container [2021-11-13 01:27:31,395 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:27:31" (1/1) ... [2021-11-13 01:27:31,403 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:27:31,640 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:27:34,068 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[381679,381692] [2021-11-13 01:27:34,098 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[383339,383352] [2021-11-13 01:27:34,266 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:34,282 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:27:35,546 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[381679,381692] [2021-11-13 01:27:35,550 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[383339,383352] [2021-11-13 01:27:35,559 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:27:35,684 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:27:35,685 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35 WrapperNode [2021-11-13 01:27:35,685 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:27:35,686 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:35,686 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:27:35,686 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:27:35,694 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:35,795 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,225 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:27:36,237 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:27:36,238 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:27:36,238 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:27:36,247 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,248 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,324 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,325 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,632 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,713 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,787 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,922 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:27:36,926 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:27:36,927 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:27:36,927 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:27:36,927 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (1/1) ... [2021-11-13 01:27:36,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:36,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:37,004 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:27:37,074 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:27:37,117 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 01:27:37,117 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 01:27:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:27:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 01:27:37,118 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 01:27:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 01:27:37,118 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 01:27:37,118 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 01:27:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 01:27:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 01:27:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 01:27:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 01:27:37,119 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 01:27:37,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-13 01:27:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 01:27:37,120 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 01:27:37,120 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:27:37,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:27:46,433 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:27:46,433 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-13 01:27:46,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:46 BoogieIcfgContainer [2021-11-13 01:27:46,440 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:27:46,444 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:27:46,444 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:27:46,447 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:27:46,448 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:27:31" (1/3) ... [2021-11-13 01:27:46,448 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411dda44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:46, skipping insertion in model container [2021-11-13 01:27:46,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:27:35" (2/3) ... [2021-11-13 01:27:46,449 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@411dda44 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:27:46, skipping insertion in model container [2021-11-13 01:27:46,449 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:27:46" (3/3) ... [2021-11-13 01:27:46,450 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:27:46,459 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:27:46,459 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:27:46,523 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:27:46,530 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 [2021-11-13 01:27:46,531 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:27:46,593 INFO L276 IsEmpty]: Start isEmpty. Operand has 1716 states, 1689 states have (on average 1.9792776791000593) internal successors, (3343), 1694 states have internal predecessors, (3343), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:27:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-13 01:27:46,605 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:46,606 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] [2021-11-13 01:27:46,606 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:46,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:46,612 INFO L85 PathProgramCache]: Analyzing trace with hash 673953637, now seen corresponding path program 1 times [2021-11-13 01:27:46,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:46,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298015462] [2021-11-13 01:27:46,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:46,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:46,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:27:46,898 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:46,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298015462] [2021-11-13 01:27:46,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298015462] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:46,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:46,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:46,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159236700] [2021-11-13 01:27:46,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:46,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:46,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:46,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:46,977 INFO L87 Difference]: Start difference. First operand has 1716 states, 1689 states have (on average 1.9792776791000593) internal successors, (3343), 1694 states have internal predecessors, (3343), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 01:27:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:47,853 INFO L93 Difference]: Finished difference Result 3481 states and 6831 transitions. [2021-11-13 01:27:47,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 35 [2021-11-13 01:27:47,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:47,892 INFO L225 Difference]: With dead ends: 3481 [2021-11-13 01:27:47,892 INFO L226 Difference]: Without dead ends: 1764 [2021-11-13 01:27:47,904 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:47,911 INFO L933 BasicCegarLoop]: 3188 mSDtfsCounter, 3424 mSDsluCounter, 3375 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 465.73ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3424 SdHoareTripleChecker+Valid, 6320 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 34.99ms SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 633.38ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:47,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3424 Valid, 6320 Invalid, 568 Unknown, 0 Unchecked, 34.99ms Time], IncrementalHoareTripleChecker [14 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 633.38ms Time] [2021-11-13 01:27:47,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1764 states. [2021-11-13 01:27:48,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1764 to 1763. [2021-11-13 01:27:48,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1763 states, 1721 states have (on average 1.9604880883207438) internal successors, (3374), 1725 states have internal predecessors, (3374), 28 states have call successors, (28), 13 states have call predecessors, (28), 12 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-13 01:27:48,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1763 states to 1763 states and 3428 transitions. [2021-11-13 01:27:48,168 INFO L78 Accepts]: Start accepts. Automaton has 1763 states and 3428 transitions. Word has length 35 [2021-11-13 01:27:48,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:48,169 INFO L470 AbstractCegarLoop]: Abstraction has 1763 states and 3428 transitions. [2021-11-13 01:27:48,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 4 states have internal predecessors, (24), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-13 01:27:48,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1763 states and 3428 transitions. [2021-11-13 01:27:48,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-13 01:27:48,174 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:48,175 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:48,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-13 01:27:48,175 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:48,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:48,176 INFO L85 PathProgramCache]: Analyzing trace with hash 707453208, now seen corresponding path program 1 times [2021-11-13 01:27:48,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:48,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101573036] [2021-11-13 01:27:48,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:48,178 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:48,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:27:48,378 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:48,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101573036] [2021-11-13 01:27:48,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101573036] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:48,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:48,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-13 01:27:48,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912616783] [2021-11-13 01:27:48,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:48,382 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-13 01:27:48,382 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:48,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-13 01:27:48,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:27:48,383 INFO L87 Difference]: Start difference. First operand 1763 states and 3428 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:27:49,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:49,246 INFO L93 Difference]: Finished difference Result 1995 states and 3731 transitions. [2021-11-13 01:27:49,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-13 01:27:49,247 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 60 [2021-11-13 01:27:49,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:49,264 INFO L225 Difference]: With dead ends: 1995 [2021-11-13 01:27:49,264 INFO L226 Difference]: Without dead ends: 1879 [2021-11-13 01:27:49,266 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-13 01:27:49,267 INFO L933 BasicCegarLoop]: 3150 mSDtfsCounter, 3441 mSDsluCounter, 6663 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 562.80ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3451 SdHoareTripleChecker+Valid, 9372 SdHoareTripleChecker+Invalid, 863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 32.05ms SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 675.26ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:49,268 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3451 Valid, 9372 Invalid, 863 Unknown, 0 Unchecked, 32.05ms Time], IncrementalHoareTripleChecker [92 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 675.26ms Time] [2021-11-13 01:27:49,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1879 states. [2021-11-13 01:27:49,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1879 to 1863. [2021-11-13 01:27:49,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1789 states have (on average 1.9334823923979878) internal successors, (3459), 1794 states have internal predecessors, (3459), 48 states have call successors, (48), 25 states have call predecessors, (48), 24 states have return successors, (46), 44 states have call predecessors, (46), 46 states have call successors, (46) [2021-11-13 01:27:49,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 3553 transitions. [2021-11-13 01:27:49,356 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 3553 transitions. Word has length 60 [2021-11-13 01:27:49,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 3553 transitions. [2021-11-13 01:27:49,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-13 01:27:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 3553 transitions. [2021-11-13 01:27:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-13 01:27:49,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:49,368 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:49,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-13 01:27:49,369 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:49,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:49,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1638766449, now seen corresponding path program 1 times [2021-11-13 01:27:49,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:49,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427515918] [2021-11-13 01:27:49,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:49,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:49,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:49,472 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-13 01:27:49,473 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:49,473 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427515918] [2021-11-13 01:27:49,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427515918] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:49,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:49,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:49,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252960360] [2021-11-13 01:27:49,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:49,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:49,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:49,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:49,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:49,476 INFO L87 Difference]: Start difference. First operand 1863 states and 3553 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 01:27:49,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:49,956 INFO L93 Difference]: Finished difference Result 2031 states and 3769 transitions. [2021-11-13 01:27:49,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:49,957 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-13 01:27:49,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:49,972 INFO L225 Difference]: With dead ends: 2031 [2021-11-13 01:27:49,972 INFO L226 Difference]: Without dead ends: 1913 [2021-11-13 01:27:49,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:49,975 INFO L933 BasicCegarLoop]: 3163 mSDtfsCounter, 27 mSDsluCounter, 3357 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 324.58ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 6296 SdHoareTripleChecker+Invalid, 466 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.57ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 389.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:49,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 6296 Invalid, 466 Unknown, 0 Unchecked, 13.57ms Time], IncrementalHoareTripleChecker [0 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 389.04ms Time] [2021-11-13 01:27:49,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-11-13 01:27:50,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1883. [2021-11-13 01:27:50,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1883 states, 1805 states have (on average 1.9285318559556788) internal successors, (3481), 1810 states have internal predecessors, (3481), 50 states have call successors, (50), 27 states have call predecessors, (50), 26 states have return successors, (48), 46 states have call predecessors, (48), 48 states have call successors, (48) [2021-11-13 01:27:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1883 states to 1883 states and 3579 transitions. [2021-11-13 01:27:50,060 INFO L78 Accepts]: Start accepts. Automaton has 1883 states and 3579 transitions. Word has length 61 [2021-11-13 01:27:50,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 1883 states and 3579 transitions. [2021-11-13 01:27:50,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-13 01:27:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 1883 states and 3579 transitions. [2021-11-13 01:27:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-13 01:27:50,063 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:50,064 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:50,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-13 01:27:50,064 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:50,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:50,065 INFO L85 PathProgramCache]: Analyzing trace with hash 866421322, now seen corresponding path program 1 times [2021-11-13 01:27:50,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:50,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375081820] [2021-11-13 01:27:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:50,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:50,137 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:27:50,137 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:50,137 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375081820] [2021-11-13 01:27:50,138 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375081820] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:50,138 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:50,138 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-13 01:27:50,138 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414748967] [2021-11-13 01:27:50,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:50,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:50,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:50,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:50,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:50,140 INFO L87 Difference]: Start difference. First operand 1883 states and 3579 transitions. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:27:50,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:50,551 INFO L93 Difference]: Finished difference Result 2239 states and 4039 transitions. [2021-11-13 01:27:50,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:50,552 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 77 [2021-11-13 01:27:50,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:50,569 INFO L225 Difference]: With dead ends: 2239 [2021-11-13 01:27:50,569 INFO L226 Difference]: Without dead ends: 2002 [2021-11-13 01:27:50,571 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:27:50,579 INFO L933 BasicCegarLoop]: 3172 mSDtfsCounter, 3331 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 251 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 264.45ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3331 SdHoareTripleChecker+Valid, 3239 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 11.84ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 308.20ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:50,581 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3331 Valid, 3239 Invalid, 253 Unknown, 0 Unchecked, 11.84ms Time], IncrementalHoareTripleChecker [2 Valid, 251 Invalid, 0 Unknown, 0 Unchecked, 308.20ms Time] [2021-11-13 01:27:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-11-13 01:27:50,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1995. [2021-11-13 01:27:50,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1995 states, 1883 states have (on average 1.8990971853425385) internal successors, (3576), 1889 states have internal predecessors, (3576), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-13 01:27:50,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1995 states to 1995 states and 3716 transitions. [2021-11-13 01:27:50,680 INFO L78 Accepts]: Start accepts. Automaton has 1995 states and 3716 transitions. Word has length 77 [2021-11-13 01:27:50,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:50,681 INFO L470 AbstractCegarLoop]: Abstraction has 1995 states and 3716 transitions. [2021-11-13 01:27:50,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:27:50,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1995 states and 3716 transitions. [2021-11-13 01:27:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 01:27:50,685 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:50,685 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-13 01:27:50,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-13 01:27:50,686 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:50,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:50,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1863855741, now seen corresponding path program 1 times [2021-11-13 01:27:50,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:50,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678917574] [2021-11-13 01:27:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:50,689 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:50,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:27:50,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:50,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678917574] [2021-11-13 01:27:50,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678917574] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:50,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412305154] [2021-11-13 01:27:50,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:50,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:50,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:50,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-13 01:27:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:50,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:27:50,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 47 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-13 01:27:51,161 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:51,352 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 24 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-13 01:27:51,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412305154] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:51,352 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-13 01:27:51,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-13 01:27:51,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648364677] [2021-11-13 01:27:51,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:51,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:51,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:51,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:51,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:27:51,355 INFO L87 Difference]: Start difference. First operand 1995 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:27:51,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:51,827 INFO L93 Difference]: Finished difference Result 2237 states and 4040 transitions. [2021-11-13 01:27:51,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:51,828 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 88 [2021-11-13 01:27:51,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:51,842 INFO L225 Difference]: With dead ends: 2237 [2021-11-13 01:27:51,842 INFO L226 Difference]: Without dead ends: 2001 [2021-11-13 01:27:51,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:27:51,845 INFO L933 BasicCegarLoop]: 3164 mSDtfsCounter, 65 mSDsluCounter, 3349 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 326.03ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 6288 SdHoareTripleChecker+Invalid, 468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.76ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 390.01ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:51,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 6288 Invalid, 468 Unknown, 0 Unchecked, 10.76ms Time], IncrementalHoareTripleChecker [2 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 390.01ms Time] [2021-11-13 01:27:51,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-11-13 01:27:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1993. [2021-11-13 01:27:51,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1993 states, 1881 states have (on average 1.894736842105263) internal successors, (3564), 1887 states have internal predecessors, (3564), 71 states have call successors, (71), 40 states have call predecessors, (71), 39 states have return successors, (69), 66 states have call predecessors, (69), 69 states have call successors, (69) [2021-11-13 01:27:51,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1993 states to 1993 states and 3704 transitions. [2021-11-13 01:27:51,934 INFO L78 Accepts]: Start accepts. Automaton has 1993 states and 3704 transitions. Word has length 88 [2021-11-13 01:27:51,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:51,935 INFO L470 AbstractCegarLoop]: Abstraction has 1993 states and 3704 transitions. [2021-11-13 01:27:51,935 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:27:51,935 INFO L276 IsEmpty]: Start isEmpty. Operand 1993 states and 3704 transitions. [2021-11-13 01:27:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-13 01:27:51,938 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:51,938 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:51,975 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:52,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:52,155 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:52,155 INFO L85 PathProgramCache]: Analyzing trace with hash 66561601, now seen corresponding path program 1 times [2021-11-13 01:27:52,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:52,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133057896] [2021-11-13 01:27:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:52,156 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:52,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:52,233 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 10 proven. 13 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:27:52,235 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:52,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133057896] [2021-11-13 01:27:52,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133057896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:52,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708115241] [2021-11-13 01:27:52,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:52,236 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:52,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:52,242 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:52,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-13 01:27:52,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:52,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 397 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:27:52,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:27:52,500 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:52,675 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-13 01:27:52,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708115241] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:52,675 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:27:52,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 4] imperfect sequences [6] total 8 [2021-11-13 01:27:52,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081575441] [2021-11-13 01:27:52,676 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:52,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:52,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:52,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:52,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:27:52,679 INFO L87 Difference]: Start difference. First operand 1993 states and 3704 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:27:53,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:53,292 INFO L93 Difference]: Finished difference Result 2287 states and 4066 transitions. [2021-11-13 01:27:53,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) Word has length 88 [2021-11-13 01:27:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:53,306 INFO L225 Difference]: With dead ends: 2287 [2021-11-13 01:27:53,306 INFO L226 Difference]: Without dead ends: 2054 [2021-11-13 01:27:53,310 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 175 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:27:53,311 INFO L933 BasicCegarLoop]: 3144 mSDtfsCounter, 3355 mSDsluCounter, 3334 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 446.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3355 SdHoareTripleChecker+Valid, 6253 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.71ms SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 510.07ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:53,311 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3355 Valid, 6253 Invalid, 506 Unknown, 0 Unchecked, 13.71ms Time], IncrementalHoareTripleChecker [5 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 510.07ms Time] [2021-11-13 01:27:53,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2054 states. [2021-11-13 01:27:53,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2054 to 2054. [2021-11-13 01:27:53,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2054 states, 1932 states have (on average 1.8726708074534162) internal successors, (3618), 1938 states have internal predecessors, (3618), 73 states have call successors, (73), 48 states have call predecessors, (73), 47 states have return successors, (71), 68 states have call predecessors, (71), 71 states have call successors, (71) [2021-11-13 01:27:53,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2054 states to 2054 states and 3762 transitions. [2021-11-13 01:27:53,401 INFO L78 Accepts]: Start accepts. Automaton has 2054 states and 3762 transitions. Word has length 88 [2021-11-13 01:27:53,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:53,401 INFO L470 AbstractCegarLoop]: Abstraction has 2054 states and 3762 transitions. [2021-11-13 01:27:53,402 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 3 states have call successors, (13), 3 states have call predecessors, (13), 3 states have return successors, (13), 3 states have call predecessors, (13), 3 states have call successors, (13) [2021-11-13 01:27:53,402 INFO L276 IsEmpty]: Start isEmpty. Operand 2054 states and 3762 transitions. [2021-11-13 01:27:53,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 01:27:53,409 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:53,410 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:53,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:53,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:53,623 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:53,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:53,623 INFO L85 PathProgramCache]: Analyzing trace with hash -285124364, now seen corresponding path program 1 times [2021-11-13 01:27:53,623 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:53,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773702631] [2021-11-13 01:27:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:53,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:53,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:53,717 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-13 01:27:53,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:53,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773702631] [2021-11-13 01:27:53,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773702631] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:53,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530360955] [2021-11-13 01:27:53,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:53,718 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:53,718 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:53,719 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:53,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-13 01:27:53,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:53,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:27:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-13 01:27:54,005 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:54,181 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-13 01:27:54,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530360955] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:54,182 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:27:54,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [6] total 7 [2021-11-13 01:27:54,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612632921] [2021-11-13 01:27:54,182 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:54,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:27:54,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:54,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:27:54,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:54,184 INFO L87 Difference]: Start difference. First operand 2054 states and 3762 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 01:27:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:54,631 INFO L93 Difference]: Finished difference Result 2606 states and 4422 transitions. [2021-11-13 01:27:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:27:54,632 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) Word has length 89 [2021-11-13 01:27:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:54,646 INFO L225 Difference]: With dead ends: 2606 [2021-11-13 01:27:54,647 INFO L226 Difference]: Without dead ends: 2199 [2021-11-13 01:27:54,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:54,649 INFO L933 BasicCegarLoop]: 3151 mSDtfsCounter, 39 mSDsluCounter, 3340 mSDsCounter, 0 mSdLazyCounter, 460 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 309.75ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 6269 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.05ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 369.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:54,650 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 6269 Invalid, 462 Unknown, 0 Unchecked, 9.05ms Time], IncrementalHoareTripleChecker [2 Valid, 460 Invalid, 0 Unknown, 0 Unchecked, 369.34ms Time] [2021-11-13 01:27:54,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2199 states. [2021-11-13 01:27:54,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2199 to 2090. [2021-11-13 01:27:54,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2090 states, 1958 states have (on average 1.86414708886619) internal successors, (3650), 1965 states have internal predecessors, (3650), 78 states have call successors, (78), 53 states have call predecessors, (78), 52 states have return successors, (76), 72 states have call predecessors, (76), 76 states have call successors, (76) [2021-11-13 01:27:54,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2090 states to 2090 states and 3804 transitions. [2021-11-13 01:27:54,732 INFO L78 Accepts]: Start accepts. Automaton has 2090 states and 3804 transitions. Word has length 89 [2021-11-13 01:27:54,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:54,732 INFO L470 AbstractCegarLoop]: Abstraction has 2090 states and 3804 transitions. [2021-11-13 01:27:54,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 3 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 3 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-13 01:27:54,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2090 states and 3804 transitions. [2021-11-13 01:27:54,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-13 01:27:54,735 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:54,735 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:54,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:54,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:54,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:54,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1437231775, now seen corresponding path program 1 times [2021-11-13 01:27:54,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:54,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162391058] [2021-11-13 01:27:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:54,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:55,012 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 20 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:27:55,013 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162391058] [2021-11-13 01:27:55,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162391058] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-13 01:27:55,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728290668] [2021-11-13 01:27:55,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:55,014 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:55,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:27:55,029 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-13 01:27:55,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-13 01:27:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:55,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:27:55,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:27:55,278 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 44 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 01:27:55,278 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:27:55,451 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-13 01:27:55,452 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728290668] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:55,455 INFO L186 FreeRefinementEngine]: Found 2 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:27:55,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-13 01:27:55,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202313168] [2021-11-13 01:27:55,457 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:55,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:55,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:55,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:55,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:55,459 INFO L87 Difference]: Start difference. First operand 2090 states and 3804 transitions. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 01:27:55,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:55,916 INFO L93 Difference]: Finished difference Result 2506 states and 4303 transitions. [2021-11-13 01:27:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:55,917 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) Word has length 89 [2021-11-13 01:27:55,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:55,931 INFO L225 Difference]: With dead ends: 2506 [2021-11-13 01:27:55,931 INFO L226 Difference]: Without dead ends: 2212 [2021-11-13 01:27:55,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:27:55,934 INFO L933 BasicCegarLoop]: 3168 mSDtfsCounter, 88 mSDsluCounter, 3367 mSDsCounter, 0 mSdLazyCounter, 468 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 318.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 6311 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.39ms SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 468 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 379.83ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:55,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 6311 Invalid, 479 Unknown, 0 Unchecked, 10.39ms Time], IncrementalHoareTripleChecker [11 Valid, 468 Invalid, 0 Unknown, 0 Unchecked, 379.83ms Time] [2021-11-13 01:27:55,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2212 states. [2021-11-13 01:27:56,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2212 to 2124. [2021-11-13 01:27:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2124 states, 1984 states have (on average 1.8568548387096775) internal successors, (3684), 1991 states have internal predecessors, (3684), 82 states have call successors, (82), 57 states have call predecessors, (82), 56 states have return successors, (80), 76 states have call predecessors, (80), 80 states have call successors, (80) [2021-11-13 01:27:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2124 states to 2124 states and 3846 transitions. [2021-11-13 01:27:56,020 INFO L78 Accepts]: Start accepts. Automaton has 2124 states and 3846 transitions. Word has length 89 [2021-11-13 01:27:56,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:56,021 INFO L470 AbstractCegarLoop]: Abstraction has 2124 states and 3846 transitions. [2021-11-13 01:27:56,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 4 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 4 states have call predecessors, (14), 4 states have call successors, (14) [2021-11-13 01:27:56,021 INFO L276 IsEmpty]: Start isEmpty. Operand 2124 states and 3846 transitions. [2021-11-13 01:27:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-13 01:27:56,024 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:56,024 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:56,060 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:27:56,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-13 01:27:56,237 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:56,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash 1010717393, now seen corresponding path program 1 times [2021-11-13 01:27:56,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:56,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402759166] [2021-11-13 01:27:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:56,245 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:56,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:27:56,345 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-13 01:27:56,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-13 01:27:56,346 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402759166] [2021-11-13 01:27:56,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402759166] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-13 01:27:56,346 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:27:56,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-13 01:27:56,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952274958] [2021-11-13 01:27:56,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:27:56,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:27:56,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-13 01:27:56,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:27:56,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:56,348 INFO L87 Difference]: Start difference. First operand 2124 states and 3846 transitions. Second operand has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:27:56,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:27:56,895 INFO L93 Difference]: Finished difference Result 2868 states and 4744 transitions. [2021-11-13 01:27:56,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:27:56,896 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 90 [2021-11-13 01:27:56,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:27:56,913 INFO L225 Difference]: With dead ends: 2868 [2021-11-13 01:27:56,913 INFO L226 Difference]: Without dead ends: 2618 [2021-11-13 01:27:56,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:27:56,917 INFO L933 BasicCegarLoop]: 3195 mSDtfsCounter, 3404 mSDsluCounter, 3392 mSDsCounter, 0 mSdLazyCounter, 534 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 360.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 3404 SdHoareTripleChecker+Valid, 6353 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 12.96ms SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 428.65ms IncrementalHoareTripleChecker+Time [2021-11-13 01:27:56,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3404 Valid, 6353 Invalid, 537 Unknown, 0 Unchecked, 12.96ms Time], IncrementalHoareTripleChecker [3 Valid, 534 Invalid, 0 Unknown, 0 Unchecked, 428.65ms Time] [2021-11-13 01:27:56,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2618 states. [2021-11-13 01:27:57,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2618 to 2422. [2021-11-13 01:27:57,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2422 states, 2196 states have (on average 1.7950819672131149) internal successors, (3942), 2202 states have internal predecessors, (3942), 133 states have call successors, (133), 92 states have call predecessors, (133), 91 states have return successors, (131), 128 states have call predecessors, (131), 131 states have call successors, (131) [2021-11-13 01:27:57,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2422 states to 2422 states and 4206 transitions. [2021-11-13 01:27:57,122 INFO L78 Accepts]: Start accepts. Automaton has 2422 states and 4206 transitions. Word has length 90 [2021-11-13 01:27:57,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:27:57,123 INFO L470 AbstractCegarLoop]: Abstraction has 2422 states and 4206 transitions. [2021-11-13 01:27:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.5) internal successors, (50), 4 states have internal predecessors, (50), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:27:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2422 states and 4206 transitions. [2021-11-13 01:27:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 01:27:57,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:27:57,126 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:57,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-13 01:27:57,126 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:27:57,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:27:57,126 INFO L85 PathProgramCache]: Analyzing trace with hash -506187526, now seen corresponding path program 1 times [2021-11-13 01:27:57,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-13 01:27:57,127 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728605923] [2021-11-13 01:27:57,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:27:57,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-13 01:27:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 01:27:57,160 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 01:27:57,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 01:27:57,268 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-13 01:27:57,268 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 01:27:57,269 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 01:27:57,271 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 01:27:57,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-13 01:27:57,274 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:27:57,278 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 01:27:57,337 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-11-13 01:27:57,340 INFO L158 Benchmark]: Toolchain (without parser) took 25953.97ms. Allocated memory was 109.1MB in the beginning and 1.3GB in the end (delta: 1.2GB). Free memory was 75.5MB in the beginning and 722.4MB in the end (delta: -646.9MB). Peak memory consumption was 581.8MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,340 INFO L158 Benchmark]: CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 63.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:27:57,341 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4296.07ms. Allocated memory was 109.1MB in the beginning and 245.4MB in the end (delta: 136.3MB). Free memory was 75.1MB in the beginning and 151.2MB in the end (delta: -76.2MB). Peak memory consumption was 127.4MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,341 INFO L158 Benchmark]: Boogie Procedure Inliner took 550.79ms. Allocated memory is still 245.4MB. Free memory was 151.2MB in the beginning and 112.6MB in the end (delta: 38.6MB). Peak memory consumption was 100.7MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,341 INFO L158 Benchmark]: Boogie Preprocessor took 685.25ms. Allocated memory is still 245.4MB. Free memory was 112.6MB in the beginning and 89.0MB in the end (delta: 23.6MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,342 INFO L158 Benchmark]: RCFGBuilder took 9513.64ms. Allocated memory was 245.4MB in the beginning and 748.7MB in the end (delta: 503.3MB). Free memory was 89.0MB in the beginning and 276.4MB in the end (delta: -187.4MB). Peak memory consumption was 392.9MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,342 INFO L158 Benchmark]: TraceAbstraction took 10895.50ms. Allocated memory was 748.7MB in the beginning and 1.3GB in the end (delta: 589.3MB). Free memory was 275.3MB in the beginning and 722.4MB in the end (delta: -447.0MB). Peak memory consumption was 142.3MB. Max. memory is 16.1GB. [2021-11-13 01:27:57,344 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29ms. Allocated memory is still 109.1MB. Free memory is still 63.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4296.07ms. Allocated memory was 109.1MB in the beginning and 245.4MB in the end (delta: 136.3MB). Free memory was 75.1MB in the beginning and 151.2MB in the end (delta: -76.2MB). Peak memory consumption was 127.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 550.79ms. Allocated memory is still 245.4MB. Free memory was 151.2MB in the beginning and 112.6MB in the end (delta: 38.6MB). Peak memory consumption was 100.7MB. Max. memory is 16.1GB. * Boogie Preprocessor took 685.25ms. Allocated memory is still 245.4MB. Free memory was 112.6MB in the beginning and 89.0MB in the end (delta: 23.6MB). Peak memory consumption was 30.4MB. Max. memory is 16.1GB. * RCFGBuilder took 9513.64ms. Allocated memory was 245.4MB in the beginning and 748.7MB in the end (delta: 503.3MB). Free memory was 89.0MB in the beginning and 276.4MB in the end (delta: -187.4MB). Peak memory consumption was 392.9MB. Max. memory is 16.1GB. * TraceAbstraction took 10895.50ms. Allocated memory was 748.7MB in the beginning and 1.3GB in the end (delta: 589.3MB). Free memory was 275.3MB in the beginning and 722.4MB in the end (delta: -447.0MB). Peak memory consumption was 142.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 01:27:57,378 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF --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 b59248e26671131ba5a1485c53f1a9d7532ad734408c4cd915dfefae46656687 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-63182f1 [2021-11-13 01:27:59,746 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-13 01:27:59,748 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-13 01:27:59,803 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-13 01:27:59,804 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-13 01:27:59,808 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-13 01:27:59,810 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-13 01:27:59,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-13 01:27:59,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-13 01:27:59,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-13 01:27:59,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-13 01:27:59,828 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-13 01:27:59,829 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-13 01:27:59,831 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-13 01:27:59,833 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-13 01:27:59,837 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-13 01:27:59,839 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-13 01:27:59,840 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-13 01:27:59,842 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-13 01:27:59,849 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-13 01:27:59,851 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-13 01:27:59,852 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-13 01:27:59,854 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-13 01:27:59,857 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-13 01:27:59,865 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-13 01:27:59,866 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-13 01:27:59,866 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-13 01:27:59,867 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-13 01:27:59,868 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-13 01:27:59,869 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-13 01:27:59,869 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-13 01:27:59,870 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-13 01:27:59,871 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-13 01:27:59,872 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-13 01:27:59,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-13 01:27:59,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-13 01:27:59,895 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-13 01:27:59,896 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-13 01:27:59,896 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-13 01:27:59,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-13 01:27:59,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-13 01:27:59,899 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-13 01:27:59,943 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-13 01:27:59,943 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-13 01:27:59,944 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-13 01:27:59,945 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-13 01:27:59,945 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-13 01:27:59,945 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-13 01:27:59,945 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-13 01:27:59,946 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-13 01:27:59,946 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-13 01:27:59,947 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-13 01:27:59,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-13 01:27:59,949 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-13 01:27:59,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-13 01:27:59,950 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-13 01:27:59,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-13 01:27:59,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-13 01:27:59,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-13 01:27:59,951 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-13 01:27:59,951 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-13 01:27:59,951 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-13 01:27:59,951 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-13 01:27:59,951 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-13 01:27:59,952 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-13 01:27:59,952 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-13 01:27:59,952 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-13 01:27:59,952 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-13 01:27:59,953 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-13 01:27:59,953 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:27:59,953 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-13 01:27:59,953 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-13 01:27:59,953 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-13 01:27:59,954 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-13 01:27:59,954 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-13 01:27:59,954 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-13 01:27:59,955 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-13 01:27:59,955 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-13 01:27:59,955 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b59248e26671131ba5a1485c53f1a9d7532ad734408c4cd915dfefae46656687 [2021-11-13 01:28:00,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-13 01:28:00,432 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-13 01:28:00,436 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-13 01:28:00,437 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-13 01:28:00,438 INFO L275 PluginConnector]: CDTParser initialized [2021-11-13 01:28:00,439 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/../../sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:28:00,503 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/7ec39ed96/de7f832bbf8046b9bf00586df37039c9/FLAG60708a773 [2021-11-13 01:28:01,522 INFO L306 CDTParser]: Found 1 translation units. [2021-11-13 01:28:01,523 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:28:01,587 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/7ec39ed96/de7f832bbf8046b9bf00586df37039c9/FLAG60708a773 [2021-11-13 01:28:01,826 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/data/7ec39ed96/de7f832bbf8046b9bf00586df37039c9 [2021-11-13 01:28:01,828 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-13 01:28:01,830 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-13 01:28:01,831 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-13 01:28:01,832 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-13 01:28:01,849 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-13 01:28:01,850 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:28:01" (1/1) ... [2021-11-13 01:28:01,851 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@638f3179 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:01, skipping insertion in model container [2021-11-13 01:28:01,851 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.11 01:28:01" (1/1) ... [2021-11-13 01:28:01,858 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-13 01:28:02,125 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-13 01:28:04,727 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[381679,381692] [2021-11-13 01:28:04,756 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[383339,383352] [2021-11-13 01:28:04,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:28:04,933 INFO L203 MainTranslator]: Completed pre-run [2021-11-13 01:28:06,403 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[381679,381692] [2021-11-13 01:28:06,407 WARN L228 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_b4a46f45-2527-4fe1-8602-f4770ebe1186/sv-benchmarks/c/combinations/Problem05_label43+token_ring.01.cil-2.c[383339,383352] [2021-11-13 01:28:06,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-13 01:28:06,537 INFO L208 MainTranslator]: Completed translation [2021-11-13 01:28:06,538 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06 WrapperNode [2021-11-13 01:28:06,539 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-13 01:28:06,540 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-13 01:28:06,541 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-13 01:28:06,541 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-13 01:28:06,548 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:06,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,115 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-13 01:28:07,116 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-13 01:28:07,116 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-13 01:28:07,117 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-13 01:28:07,126 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,127 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,281 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,282 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,508 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,654 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,701 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-13 01:28:07,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-13 01:28:07,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-13 01:28:07,832 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-13 01:28:07,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (1/1) ... [2021-11-13 01:28:07,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-13 01:28:07,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 [2021-11-13 01:28:07,872 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-13 01:28:07,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-13 01:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-13 01:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-13 01:28:08,004 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-13 01:28:08,004 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-13 01:28:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-13 01:28:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-13 01:28:08,005 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-13 01:28:08,005 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-13 01:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-13 01:28:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-13 01:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-13 01:28:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-13 01:28:08,006 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-13 01:28:08,006 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-13 01:28:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-13 01:28:08,007 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-13 01:28:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-13 01:28:08,007 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-13 01:28:17,965 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-13 01:28:17,966 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-11-13 01:28:17,970 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:28:17 BoogieIcfgContainer [2021-11-13 01:28:17,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-13 01:28:17,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-13 01:28:17,973 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-13 01:28:17,976 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-13 01:28:17,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.11 01:28:01" (1/3) ... [2021-11-13 01:28:17,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37acea9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:28:17, skipping insertion in model container [2021-11-13 01:28:17,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.11 01:28:06" (2/3) ... [2021-11-13 01:28:17,977 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37acea9b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.11 01:28:17, skipping insertion in model container [2021-11-13 01:28:17,978 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.11 01:28:17" (3/3) ... [2021-11-13 01:28:17,979 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label43+token_ring.01.cil-2.c [2021-11-13 01:28:17,984 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-13 01:28:17,985 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-13 01:28:18,116 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-13 01:28:18,123 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 [2021-11-13 01:28:18,123 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-13 01:28:18,185 INFO L276 IsEmpty]: Start isEmpty. Operand has 2298 states, 2271 states have (on average 1.8590929106120653) internal successors, (4222), 2276 states have internal predecessors, (4222), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-13 01:28:18,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:18,194 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:18,195 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:18,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:18,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 1417964819, now seen corresponding path program 1 times [2021-11-13 01:28:18,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:18,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1496615960] [2021-11-13 01:28:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:18,215 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:18,215 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:18,218 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:18,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-13 01:28:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:18,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:18,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:18,791 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:18,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1496615960] [2021-11-13 01:28:18,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1496615960] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:18,792 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:18,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:28:18,794 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476228146] [2021-11-13 01:28:18,795 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:18,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:18,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:18,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:18,834 INFO L87 Difference]: Start difference. First operand has 2298 states, 2271 states have (on average 1.8590929106120653) internal successors, (4222), 2276 states have internal predecessors, (4222), 17 states have call successors, (17), 7 states have call predecessors, (17), 7 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:19,395 INFO L93 Difference]: Finished difference Result 4688 states and 8658 transitions. [2021-11-13 01:28:19,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:19,397 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-11-13 01:28:19,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:19,425 INFO L225 Difference]: With dead ends: 4688 [2021-11-13 01:28:19,425 INFO L226 Difference]: Without dead ends: 2329 [2021-11-13 01:28:19,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:28:19,438 INFO L933 BasicCegarLoop]: 4170 mSDtfsCounter, 4385 mSDsluCounter, 8316 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 191.74ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4401 SdHoareTripleChecker+Valid, 12486 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 51.74ms SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 244.04ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:19,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4401 Valid, 12486 Invalid, 246 Unknown, 0 Unchecked, 51.74ms Time], IncrementalHoareTripleChecker [50 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 244.04ms Time] [2021-11-13 01:28:19,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2329 states. [2021-11-13 01:28:19,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2329 to 2325. [2021-11-13 01:28:19,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2283 states have (on average 1.8379325448970654) internal successors, (4196), 2287 states have internal predecessors, (4196), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-13 01:28:19,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 4249 transitions. [2021-11-13 01:28:19,616 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 4249 transitions. Word has length 58 [2021-11-13 01:28:19,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:19,616 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 4249 transitions. [2021-11-13 01:28:19,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.285714285714286) internal successors, (79), 5 states have internal predecessors, (79), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:19,617 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 4249 transitions. [2021-11-13 01:28:19,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:19,627 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:19,627 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:19,651 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:19,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:19,842 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:19,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:19,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1082743281, now seen corresponding path program 1 times [2021-11-13 01:28:19,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:19,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [398446074] [2021-11-13 01:28:19,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:19,848 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:19,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:19,849 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:19,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-13 01:28:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:19,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:19,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:20,078 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:20,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:20,237 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:20,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [398446074] [2021-11-13 01:28:20,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [398446074] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:20,246 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:20,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:28:20,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081046424] [2021-11-13 01:28:20,250 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:20,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:20,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:20,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:20,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:20,254 INFO L87 Difference]: Start difference. First operand 2325 states and 4249 transitions. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:20,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:20,655 INFO L93 Difference]: Finished difference Result 2520 states and 4534 transitions. [2021-11-13 01:28:20,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:28:20,662 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-11-13 01:28:20,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:20,679 INFO L225 Difference]: With dead ends: 2520 [2021-11-13 01:28:20,679 INFO L226 Difference]: Without dead ends: 2325 [2021-11-13 01:28:20,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-13 01:28:20,683 INFO L933 BasicCegarLoop]: 4092 mSDtfsCounter, 12275 mSDsluCounter, 8074 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 157.60ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 12284 SdHoareTripleChecker+Valid, 12166 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 53.79ms SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 191.34ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:20,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12284 Valid, 12166 Invalid, 189 Unknown, 0 Unchecked, 53.79ms Time], IncrementalHoareTripleChecker [89 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 191.34ms Time] [2021-11-13 01:28:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2325 states. [2021-11-13 01:28:20,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2325 to 2325. [2021-11-13 01:28:20,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2325 states, 2283 states have (on average 1.8348664038545772) internal successors, (4189), 2287 states have internal predecessors, (4189), 27 states have call successors, (27), 13 states have call predecessors, (27), 13 states have return successors, (26), 25 states have call predecessors, (26), 25 states have call successors, (26) [2021-11-13 01:28:20,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2325 states to 2325 states and 4242 transitions. [2021-11-13 01:28:20,781 INFO L78 Accepts]: Start accepts. Automaton has 2325 states and 4242 transitions. Word has length 58 [2021-11-13 01:28:20,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:20,782 INFO L470 AbstractCegarLoop]: Abstraction has 2325 states and 4242 transitions. [2021-11-13 01:28:20,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 2325 states and 4242 transitions. [2021-11-13 01:28:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:20,793 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:20,793 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:20,808 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:20,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:20,994 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:20,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:20,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1994695277, now seen corresponding path program 1 times [2021-11-13 01:28:20,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:20,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1629228542] [2021-11-13 01:28:20,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:20,995 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:20,996 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:21,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-13 01:28:21,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:21,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:21,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:21,261 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:21,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:21,411 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:21,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1629228542] [2021-11-13 01:28:21,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1629228542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:21,414 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:21,414 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:28:21,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542809197] [2021-11-13 01:28:21,417 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:21,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:21,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:21,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:21,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:21,419 INFO L87 Difference]: Start difference. First operand 2325 states and 4242 transitions. Second operand has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:21,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:21,773 INFO L93 Difference]: Finished difference Result 2558 states and 4576 transitions. [2021-11-13 01:28:21,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:21,774 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-11-13 01:28:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:21,792 INFO L225 Difference]: With dead ends: 2558 [2021-11-13 01:28:21,792 INFO L226 Difference]: Without dead ends: 2363 [2021-11-13 01:28:21,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:28:21,798 INFO L933 BasicCegarLoop]: 4088 mSDtfsCounter, 4170 mSDsluCounter, 8068 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 143.67ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4179 SdHoareTripleChecker+Valid, 12156 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 33.31ms SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 177.47ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:21,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4179 Valid, 12156 Invalid, 170 Unknown, 0 Unchecked, 33.31ms Time], IncrementalHoareTripleChecker [36 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 177.47ms Time] [2021-11-13 01:28:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2021-11-13 01:28:21,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 2363. [2021-11-13 01:28:21,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2363 states, 2315 states have (on average 1.824622030237581) internal successors, (4224), 2319 states have internal predecessors, (4224), 29 states have call successors, (29), 17 states have call predecessors, (29), 17 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 01:28:21,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2363 states to 2363 states and 4281 transitions. [2021-11-13 01:28:21,895 INFO L78 Accepts]: Start accepts. Automaton has 2363 states and 4281 transitions. Word has length 58 [2021-11-13 01:28:21,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:21,895 INFO L470 AbstractCegarLoop]: Abstraction has 2363 states and 4281 transitions. [2021-11-13 01:28:21,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.571428571428571) internal successors, (81), 7 states have internal predecessors, (81), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 2363 states and 4281 transitions. [2021-11-13 01:28:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:21,897 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:21,898 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:21,911 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:22,110 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:22,110 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:22,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:22,111 INFO L85 PathProgramCache]: Analyzing trace with hash 993059566, now seen corresponding path program 1 times [2021-11-13 01:28:22,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:22,112 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1706506542] [2021-11-13 01:28:22,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:22,112 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:22,113 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:22,118 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-13 01:28:22,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:22,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:22,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:22,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:22,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:22,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:22,583 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:22,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1706506542] [2021-11-13 01:28:22,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1706506542] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:22,584 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:22,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 7 [2021-11-13 01:28:22,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218818459] [2021-11-13 01:28:22,584 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:22,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-13 01:28:22,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:22,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-13 01:28:22,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:22,589 INFO L87 Difference]: Start difference. First operand 2363 states and 4281 transitions. Second operand has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:22,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:22,912 INFO L93 Difference]: Finished difference Result 2628 states and 4646 transitions. [2021-11-13 01:28:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:22,913 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 58 [2021-11-13 01:28:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:22,930 INFO L225 Difference]: With dead ends: 2628 [2021-11-13 01:28:22,930 INFO L226 Difference]: Without dead ends: 2395 [2021-11-13 01:28:22,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-11-13 01:28:22,937 INFO L933 BasicCegarLoop]: 4086 mSDtfsCounter, 4162 mSDsluCounter, 8064 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 133.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 12150 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 30.77ms SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 166.22ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:22,939 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 12150 Invalid, 169 Unknown, 0 Unchecked, 30.77ms Time], IncrementalHoareTripleChecker [35 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 166.22ms Time] [2021-11-13 01:28:22,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2395 states. [2021-11-13 01:28:23,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2395 to 2395. [2021-11-13 01:28:23,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2395 states, 2345 states have (on average 1.8136460554371001) internal successors, (4253), 2349 states have internal predecessors, (4253), 29 states have call successors, (29), 19 states have call predecessors, (29), 19 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 01:28:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2395 states to 2395 states and 4310 transitions. [2021-11-13 01:28:23,033 INFO L78 Accepts]: Start accepts. Automaton has 2395 states and 4310 transitions. Word has length 58 [2021-11-13 01:28:23,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:23,036 INFO L470 AbstractCegarLoop]: Abstraction has 2395 states and 4310 transitions. [2021-11-13 01:28:23,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.714285714285714) internal successors, (82), 7 states have internal predecessors, (82), 3 states have call successors, (11), 5 states have call predecessors, (11), 4 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-13 01:28:23,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2395 states and 4310 transitions. [2021-11-13 01:28:23,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:23,040 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:23,040 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:23,058 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:23,254 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:23,254 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:23,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:23,257 INFO L85 PathProgramCache]: Analyzing trace with hash 518368114, now seen corresponding path program 1 times [2021-11-13 01:28:23,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:23,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1651119443] [2021-11-13 01:28:23,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:23,258 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:23,259 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:23,259 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:23,265 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-13 01:28:23,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:23,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:23,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:23,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:23,477 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:23,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:23,614 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:23,615 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1651119443] [2021-11-13 01:28:23,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1651119443] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:23,615 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:23,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:28:23,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445894144] [2021-11-13 01:28:23,616 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:23,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:28:23,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:23,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:28:23,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:28:23,617 INFO L87 Difference]: Start difference. First operand 2395 states and 4310 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:23,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:23,750 INFO L93 Difference]: Finished difference Result 2701 states and 4711 transitions. [2021-11-13 01:28:23,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:23,751 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-11-13 01:28:23,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:23,767 INFO L225 Difference]: With dead ends: 2701 [2021-11-13 01:28:23,767 INFO L226 Difference]: Without dead ends: 2437 [2021-11-13 01:28:23,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:23,772 INFO L933 BasicCegarLoop]: 4101 mSDtfsCounter, 49 mSDsluCounter, 12317 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.68ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 16418 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.72ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.25ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:23,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 16418 Invalid, 14 Unknown, 0 Unchecked, 26.72ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 10.25ms Time] [2021-11-13 01:28:23,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2021-11-13 01:28:23,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 2401. [2021-11-13 01:28:23,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2401 states, 2351 states have (on average 1.8098681412165036) internal successors, (4255), 2355 states have internal predecessors, (4255), 29 states have call successors, (29), 19 states have call predecessors, (29), 19 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 01:28:23,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2401 states to 2401 states and 4312 transitions. [2021-11-13 01:28:23,875 INFO L78 Accepts]: Start accepts. Automaton has 2401 states and 4312 transitions. Word has length 58 [2021-11-13 01:28:23,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:23,876 INFO L470 AbstractCegarLoop]: Abstraction has 2401 states and 4312 transitions. [2021-11-13 01:28:23,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:23,876 INFO L276 IsEmpty]: Start isEmpty. Operand 2401 states and 4312 transitions. [2021-11-13 01:28:23,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:23,878 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:23,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:23,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:24,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:24,090 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:24,091 INFO L85 PathProgramCache]: Analyzing trace with hash -1725615184, now seen corresponding path program 1 times [2021-11-13 01:28:24,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:24,092 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1060103793] [2021-11-13 01:28:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:24,092 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:24,092 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:24,093 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:24,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-13 01:28:24,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:24,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-13 01:28:24,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:24,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:24,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:24,379 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:24,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1060103793] [2021-11-13 01:28:24,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1060103793] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:24,379 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:24,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-13 01:28:24,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473713528] [2021-11-13 01:28:24,380 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:24,384 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:28:24,384 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:24,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:28:24,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:28:24,385 INFO L87 Difference]: Start difference. First operand 2401 states and 4312 transitions. Second operand has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:24,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:24,504 INFO L93 Difference]: Finished difference Result 2685 states and 4679 transitions. [2021-11-13 01:28:24,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-13 01:28:24,504 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 58 [2021-11-13 01:28:24,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:24,522 INFO L225 Difference]: With dead ends: 2685 [2021-11-13 01:28:24,522 INFO L226 Difference]: Without dead ends: 2415 [2021-11-13 01:28:24,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-13 01:28:24,525 INFO L933 BasicCegarLoop]: 4101 mSDtfsCounter, 10 mSDsluCounter, 12302 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.54ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 16403 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 20.35ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.08ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:24,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 16403 Invalid, 14 Unknown, 0 Unchecked, 20.35ms Time], IncrementalHoareTripleChecker [1 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 14.08ms Time] [2021-11-13 01:28:24,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-11-13 01:28:24,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 2407. [2021-11-13 01:28:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2407 states, 2357 states have (on average 1.8061094611794655) internal successors, (4257), 2361 states have internal predecessors, (4257), 29 states have call successors, (29), 19 states have call predecessors, (29), 19 states have return successors, (28), 27 states have call predecessors, (28), 27 states have call successors, (28) [2021-11-13 01:28:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2407 states to 2407 states and 4314 transitions. [2021-11-13 01:28:24,620 INFO L78 Accepts]: Start accepts. Automaton has 2407 states and 4314 transitions. Word has length 58 [2021-11-13 01:28:24,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:24,620 INFO L470 AbstractCegarLoop]: Abstraction has 2407 states and 4314 transitions. [2021-11-13 01:28:24,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.2) internal successors, (56), 5 states have internal predecessors, (56), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-13 01:28:24,620 INFO L276 IsEmpty]: Start isEmpty. Operand 2407 states and 4314 transitions. [2021-11-13 01:28:24,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-13 01:28:24,621 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:24,622 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:24,637 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:24,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:24,834 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:24,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:24,834 INFO L85 PathProgramCache]: Analyzing trace with hash 2059879022, now seen corresponding path program 1 times [2021-11-13 01:28:24,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:24,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1784245461] [2021-11-13 01:28:24,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:24,835 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:24,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:24,836 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:24,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-13 01:28:24,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:24,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:24,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:25,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:25,058 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-13 01:28:25,173 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:25,173 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1784245461] [2021-11-13 01:28:25,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1784245461] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:25,173 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:25,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 01:28:25,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115561446] [2021-11-13 01:28:25,173 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:25,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:28:25,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:25,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:28:25,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:25,175 INFO L87 Difference]: Start difference. First operand 2407 states and 4314 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 01:28:25,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:25,264 INFO L93 Difference]: Finished difference Result 2926 states and 4957 transitions. [2021-11-13 01:28:25,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:28:25,265 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 58 [2021-11-13 01:28:25,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:25,281 INFO L225 Difference]: With dead ends: 2926 [2021-11-13 01:28:25,282 INFO L226 Difference]: Without dead ends: 2650 [2021-11-13 01:28:25,284 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 [2021-11-13 01:28:25,284 INFO L933 BasicCegarLoop]: 4139 mSDtfsCounter, 4027 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.10ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4027 SdHoareTripleChecker+Valid, 4261 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.91ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.92ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:25,285 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4027 Valid, 4261 Invalid, 10 Unknown, 0 Unchecked, 10.91ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 9.92ms Time] [2021-11-13 01:28:25,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2650 states. [2021-11-13 01:28:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2650 to 2648. [2021-11-13 01:28:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2648 states, 2556 states have (on average 1.7566510172143974) internal successors, (4490), 2563 states have internal predecessors, (4490), 52 states have call successors, (52), 37 states have call predecessors, (52), 38 states have return successors, (52), 48 states have call predecessors, (52), 50 states have call successors, (52) [2021-11-13 01:28:25,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2648 states to 2648 states and 4594 transitions. [2021-11-13 01:28:25,476 INFO L78 Accepts]: Start accepts. Automaton has 2648 states and 4594 transitions. Word has length 58 [2021-11-13 01:28:25,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:25,476 INFO L470 AbstractCegarLoop]: Abstraction has 2648 states and 4594 transitions. [2021-11-13 01:28:25,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2021-11-13 01:28:25,477 INFO L276 IsEmpty]: Start isEmpty. Operand 2648 states and 4594 transitions. [2021-11-13 01:28:25,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 01:28:25,478 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:25,479 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:25,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:25,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:25,691 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:25,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:25,692 INFO L85 PathProgramCache]: Analyzing trace with hash 1460919208, now seen corresponding path program 1 times [2021-11-13 01:28:25,692 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:25,692 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [470585744] [2021-11-13 01:28:25,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:25,692 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:25,693 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:25,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:25,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-13 01:28:25,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:25,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-13 01:28:25,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:26,019 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:28:26,019 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:28:26,460 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:26,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [470585744] [2021-11-13 01:28:26,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [470585744] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:26,460 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:26,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 5 [2021-11-13 01:28:26,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126965615] [2021-11-13 01:28:26,461 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:26,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-13 01:28:26,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:26,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-13 01:28:26,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-13 01:28:26,463 INFO L87 Difference]: Start difference. First operand 2648 states and 4594 transitions. Second operand has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 01:28:26,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:26,827 INFO L93 Difference]: Finished difference Result 3584 states and 5741 transitions. [2021-11-13 01:28:26,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-13 01:28:26,837 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) Word has length 93 [2021-11-13 01:28:26,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:26,866 INFO L225 Difference]: With dead ends: 3584 [2021-11-13 01:28:26,866 INFO L226 Difference]: Without dead ends: 3068 [2021-11-13 01:28:26,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-11-13 01:28:26,870 INFO L933 BasicCegarLoop]: 4149 mSDtfsCounter, 8155 mSDsluCounter, 4112 mSDsCounter, 0 mSdLazyCounter, 78 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 120.93ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 8161 SdHoareTripleChecker+Valid, 8261 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 26.99ms SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 78 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 147.71ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:26,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8161 Valid, 8261 Invalid, 154 Unknown, 0 Unchecked, 26.99ms Time], IncrementalHoareTripleChecker [76 Valid, 78 Invalid, 0 Unknown, 0 Unchecked, 147.71ms Time] [2021-11-13 01:28:26,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3068 states. [2021-11-13 01:28:27,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3068 to 3064. [2021-11-13 01:28:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3064 states, 2893 states have (on average 1.6906325613549948) internal successors, (4891), 2909 states have internal predecessors, (4891), 93 states have call successors, (93), 65 states have call predecessors, (93), 76 states have return successors, (115), 91 states have call predecessors, (115), 91 states have call successors, (115) [2021-11-13 01:28:27,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3064 states to 3064 states and 5099 transitions. [2021-11-13 01:28:27,055 INFO L78 Accepts]: Start accepts. Automaton has 3064 states and 5099 transitions. Word has length 93 [2021-11-13 01:28:27,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:27,056 INFO L470 AbstractCegarLoop]: Abstraction has 3064 states and 5099 transitions. [2021-11-13 01:28:27,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.2) internal successors, (91), 5 states have internal predecessors, (91), 5 states have call successors, (16), 5 states have call predecessors, (16), 5 states have return successors, (15), 5 states have call predecessors, (15), 5 states have call successors, (15) [2021-11-13 01:28:27,056 INFO L276 IsEmpty]: Start isEmpty. Operand 3064 states and 5099 transitions. [2021-11-13 01:28:27,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-13 01:28:27,064 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:27,065 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:27,083 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:27,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:27,283 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:27,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:27,283 INFO L85 PathProgramCache]: Analyzing trace with hash -418211738, now seen corresponding path program 1 times [2021-11-13 01:28:27,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:27,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1732596207] [2021-11-13 01:28:27,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:27,284 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:27,284 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:27,284 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:27,285 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-11-13 01:28:27,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:27,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:27,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:27,557 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:28:27,557 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:27,710 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-13 01:28:27,711 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:27,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1732596207] [2021-11-13 01:28:27,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1732596207] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:27,711 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:27,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:28:27,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897547307] [2021-11-13 01:28:27,712 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:27,713 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:28:27,713 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:27,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:28:27,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:27,714 INFO L87 Difference]: Start difference. First operand 3064 states and 5099 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 01:28:27,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:27,866 INFO L93 Difference]: Finished difference Result 3992 states and 6216 transitions. [2021-11-13 01:28:27,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:28:27,867 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) Word has length 93 [2021-11-13 01:28:27,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:27,910 INFO L225 Difference]: With dead ends: 3992 [2021-11-13 01:28:27,910 INFO L226 Difference]: Without dead ends: 3060 [2021-11-13 01:28:27,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:27,917 INFO L933 BasicCegarLoop]: 4102 mSDtfsCounter, 137 mSDsluCounter, 3958 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.42ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 8060 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 10.61ms SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.45ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:27,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 8060 Invalid, 2 Unknown, 0 Unchecked, 10.61ms Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 7.45ms Time] [2021-11-13 01:28:27,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3060 states. [2021-11-13 01:28:28,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3060 to 3060. [2021-11-13 01:28:28,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3060 states, 2892 states have (on average 1.6905255878284924) internal successors, (4889), 2907 states have internal predecessors, (4889), 90 states have call successors, (90), 65 states have call predecessors, (90), 76 states have return successors, (112), 88 states have call predecessors, (112), 88 states have call successors, (112) [2021-11-13 01:28:28,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3060 states to 3060 states and 5091 transitions. [2021-11-13 01:28:28,119 INFO L78 Accepts]: Start accepts. Automaton has 3060 states and 5091 transitions. Word has length 93 [2021-11-13 01:28:28,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:28,119 INFO L470 AbstractCegarLoop]: Abstraction has 3060 states and 5091 transitions. [2021-11-13 01:28:28,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (14), 3 states have call predecessors, (14), 3 states have call successors, (14) [2021-11-13 01:28:28,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3060 states and 5091 transitions. [2021-11-13 01:28:28,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-13 01:28:28,123 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:28,123 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:28,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:28,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:28,337 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:28,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:28,338 INFO L85 PathProgramCache]: Analyzing trace with hash -677410577, now seen corresponding path program 1 times [2021-11-13 01:28:28,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:28,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1230745968] [2021-11-13 01:28:28,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:28,339 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:28,340 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:28,341 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:28,376 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-13 01:28:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:28,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:28,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:28,616 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:28:28,617 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-13 01:28:28,776 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:28,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1230745968] [2021-11-13 01:28:28,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1230745968] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:28,776 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:28,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 4 [2021-11-13 01:28:28,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716057092] [2021-11-13 01:28:28,777 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:28,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:28:28,778 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:28,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:28:28,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:28,779 INFO L87 Difference]: Start difference. First operand 3060 states and 5091 transitions. Second operand has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:28:29,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:29,118 INFO L93 Difference]: Finished difference Result 5305 states and 7848 transitions. [2021-11-13 01:28:29,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:28:29,119 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 94 [2021-11-13 01:28:29,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:29,133 INFO L225 Difference]: With dead ends: 5305 [2021-11-13 01:28:29,133 INFO L226 Difference]: Without dead ends: 3724 [2021-11-13 01:28:29,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:29,139 INFO L933 BasicCegarLoop]: 4245 mSDtfsCounter, 245 mSDsluCounter, 4165 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 77.34ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 8410 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 13.72ms SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 95.57ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:29,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 8410 Invalid, 63 Unknown, 0 Unchecked, 13.72ms Time], IncrementalHoareTripleChecker [23 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 95.57ms Time] [2021-11-13 01:28:29,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3724 states. [2021-11-13 01:28:29,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3724 to 3724. [2021-11-13 01:28:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3724 states, 3436 states have (on average 1.6018626309662398) internal successors, (5504), 3455 states have internal predecessors, (5504), 158 states have call successors, (158), 113 states have call predecessors, (158), 128 states have return successors, (210), 156 states have call predecessors, (210), 156 states have call successors, (210) [2021-11-13 01:28:29,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3724 states to 3724 states and 5872 transitions. [2021-11-13 01:28:29,416 INFO L78 Accepts]: Start accepts. Automaton has 3724 states and 5872 transitions. Word has length 94 [2021-11-13 01:28:29,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:29,417 INFO L470 AbstractCegarLoop]: Abstraction has 3724 states and 5872 transitions. [2021-11-13 01:28:29,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.0) internal successors, (72), 4 states have internal predecessors, (72), 4 states have call successors, (10), 3 states have call predecessors, (10), 2 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:28:29,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3724 states and 5872 transitions. [2021-11-13 01:28:29,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2021-11-13 01:28:29,421 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:29,422 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:29,438 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:29,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:29,638 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:29,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1678524408, now seen corresponding path program 1 times [2021-11-13 01:28:29,640 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:29,640 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [431911422] [2021-11-13 01:28:29,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:29,640 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:29,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:29,642 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:29,688 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-11-13 01:28:29,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:29,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:29,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:30,036 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-11-13 01:28:30,036 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:30,279 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-13 01:28:30,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:30,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [431911422] [2021-11-13 01:28:30,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [431911422] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:30,280 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:30,280 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 3] imperfect sequences [] total 3 [2021-11-13 01:28:30,280 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904619411] [2021-11-13 01:28:30,280 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:30,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:28:30,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:30,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:28:30,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:30,282 INFO L87 Difference]: Start difference. First operand 3724 states and 5872 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:28:30,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:30,439 INFO L93 Difference]: Finished difference Result 5655 states and 8166 transitions. [2021-11-13 01:28:30,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:28:30,440 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) Word has length 119 [2021-11-13 01:28:30,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:30,454 INFO L225 Difference]: With dead ends: 5655 [2021-11-13 01:28:30,454 INFO L226 Difference]: Without dead ends: 4062 [2021-11-13 01:28:30,459 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:30,460 INFO L933 BasicCegarLoop]: 4138 mSDtfsCounter, 4002 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.06ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4002 SdHoareTripleChecker+Valid, 4260 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.59ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.06ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:30,460 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4002 Valid, 4260 Invalid, 10 Unknown, 0 Unchecked, 9.59ms Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 10.06ms Time] [2021-11-13 01:28:30,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4062 states. [2021-11-13 01:28:30,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4062 to 4046. [2021-11-13 01:28:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 3698 states have (on average 1.5657111952406706) internal successors, (5790), 3719 states have internal predecessors, (5790), 192 states have call successors, (192), 137 states have call predecessors, (192), 154 states have return successors, (246), 190 states have call predecessors, (246), 190 states have call successors, (246) [2021-11-13 01:28:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 6228 transitions. [2021-11-13 01:28:30,650 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 6228 transitions. Word has length 119 [2021-11-13 01:28:30,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:30,651 INFO L470 AbstractCegarLoop]: Abstraction has 4046 states and 6228 transitions. [2021-11-13 01:28:30,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (20), 3 states have call predecessors, (20), 3 states have return successors, (19), 3 states have call predecessors, (19), 3 states have call successors, (19) [2021-11-13 01:28:30,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 6228 transitions. [2021-11-13 01:28:30,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-13 01:28:30,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:30,656 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, 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] [2021-11-13 01:28:30,674 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:30,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:30,875 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:30,875 INFO L85 PathProgramCache]: Analyzing trace with hash 2116042813, now seen corresponding path program 1 times [2021-11-13 01:28:30,875 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:30,875 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [780573854] [2021-11-13 01:28:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:30,876 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:30,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:30,877 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:30,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Waiting until timeout for monitored process [2021-11-13 01:28:30,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:30,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:30,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-11-13 01:28:31,201 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:31,463 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 31 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2021-11-13 01:28:31,464 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:31,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [780573854] [2021-11-13 01:28:31,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [780573854] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:31,464 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:28:31,464 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2021-11-13 01:28:31,464 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804415068] [2021-11-13 01:28:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:28:31,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:28:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:31,466 INFO L87 Difference]: Start difference. First operand 4046 states and 6228 transitions. Second operand has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:28:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:31,646 INFO L93 Difference]: Finished difference Result 5646 states and 8199 transitions. [2021-11-13 01:28:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:28:31,646 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 136 [2021-11-13 01:28:31,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:31,660 INFO L225 Difference]: With dead ends: 5646 [2021-11-13 01:28:31,660 INFO L226 Difference]: Without dead ends: 4054 [2021-11-13 01:28:31,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:31,667 INFO L933 BasicCegarLoop]: 4163 mSDtfsCounter, 101 mSDsluCounter, 4064 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.33ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 8227 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.41ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.89ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:31,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 8227 Invalid, 8 Unknown, 0 Unchecked, 9.41ms Time], IncrementalHoareTripleChecker [2 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 13.89ms Time] [2021-11-13 01:28:31,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2021-11-13 01:28:31,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4046. [2021-11-13 01:28:31,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4046 states, 3698 states have (on average 1.5527312060573284) internal successors, (5742), 3719 states have internal predecessors, (5742), 192 states have call successors, (192), 137 states have call predecessors, (192), 154 states have return successors, (246), 190 states have call predecessors, (246), 190 states have call successors, (246) [2021-11-13 01:28:31,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4046 states to 4046 states and 6180 transitions. [2021-11-13 01:28:31,864 INFO L78 Accepts]: Start accepts. Automaton has 4046 states and 6180 transitions. Word has length 136 [2021-11-13 01:28:31,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:31,865 INFO L470 AbstractCegarLoop]: Abstraction has 4046 states and 6180 transitions. [2021-11-13 01:28:31,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.666666666666664) internal successors, (107), 3 states have internal predecessors, (107), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-13 01:28:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 4046 states and 6180 transitions. [2021-11-13 01:28:31,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2021-11-13 01:28:31,870 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:31,870 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:31,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (13)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:32,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:32,084 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:32,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:32,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1312364636, now seen corresponding path program 1 times [2021-11-13 01:28:32,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:32,085 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815031801] [2021-11-13 01:28:32,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:32,085 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:32,085 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:32,087 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:32,124 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-13 01:28:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:32,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-13 01:28:32,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 55 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-13 01:28:32,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:32,842 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2021-11-13 01:28:32,843 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:32,843 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815031801] [2021-11-13 01:28:32,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1815031801] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-13 01:28:32,843 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-13 01:28:32,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-13 01:28:32,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87291722] [2021-11-13 01:28:32,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:32,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-13 01:28:32,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:32,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-13 01:28:32,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:32,845 INFO L87 Difference]: Start difference. First operand 4046 states and 6180 transitions. Second operand has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:28:33,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:33,323 INFO L93 Difference]: Finished difference Result 5921 states and 8329 transitions. [2021-11-13 01:28:33,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-13 01:28:33,324 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 137 [2021-11-13 01:28:33,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:33,346 INFO L225 Difference]: With dead ends: 5921 [2021-11-13 01:28:33,346 INFO L226 Difference]: Without dead ends: 5918 [2021-11-13 01:28:33,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 270 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-13 01:28:33,350 INFO L933 BasicCegarLoop]: 4205 mSDtfsCounter, 4171 mSDsluCounter, 4172 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 97.41ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 4171 SdHoareTripleChecker+Valid, 8377 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 16.78ms SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 118.72ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:33,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4171 Valid, 8377 Invalid, 63 Unknown, 0 Unchecked, 16.78ms Time], IncrementalHoareTripleChecker [2 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 118.72ms Time] [2021-11-13 01:28:33,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5918 states. [2021-11-13 01:28:33,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5918 to 4974. [2021-11-13 01:28:33,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4974 states, 4458 states have (on average 1.48138178555406) internal successors, (6604), 4487 states have internal predecessors, (6604), 286 states have call successors, (286), 201 states have call predecessors, (286), 228 states have return successors, (380), 286 states have call predecessors, (380), 284 states have call successors, (380) [2021-11-13 01:28:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4974 states to 4974 states and 7270 transitions. [2021-11-13 01:28:33,631 INFO L78 Accepts]: Start accepts. Automaton has 4974 states and 7270 transitions. Word has length 137 [2021-11-13 01:28:33,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:33,631 INFO L470 AbstractCegarLoop]: Abstraction has 4974 states and 7270 transitions. [2021-11-13 01:28:33,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.25) internal successors, (81), 4 states have internal predecessors, (81), 4 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-13 01:28:33,632 INFO L276 IsEmpty]: Start isEmpty. Operand 4974 states and 7270 transitions. [2021-11-13 01:28:33,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-11-13 01:28:33,637 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:33,637 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:33,658 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (14)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:33,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:33,855 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:33,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:33,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1384992052, now seen corresponding path program 1 times [2021-11-13 01:28:33,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:33,856 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2056642941] [2021-11-13 01:28:33,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:33,856 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:33,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:33,859 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:33,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Waiting until timeout for monitored process [2021-11-13 01:28:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-13 01:28:33,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-13 01:28:33,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-13 01:28:34,167 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 01:28:34,168 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-13 01:28:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-13 01:28:34,428 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-13 01:28:34,428 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2056642941] [2021-11-13 01:28:34,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2056642941] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-13 01:28:34,428 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-13 01:28:34,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-11-13 01:28:34,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112985544] [2021-11-13 01:28:34,429 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-13 01:28:34,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-13 01:28:34,430 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-13 01:28:34,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-13 01:28:34,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:34,431 INFO L87 Difference]: Start difference. First operand 4974 states and 7270 transitions. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 01:28:34,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-13 01:28:34,750 INFO L93 Difference]: Finished difference Result 7988 states and 11071 transitions. [2021-11-13 01:28:34,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-13 01:28:34,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) Word has length 141 [2021-11-13 01:28:34,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-13 01:28:34,791 INFO L225 Difference]: With dead ends: 7988 [2021-11-13 01:28:34,791 INFO L226 Difference]: Without dead ends: 5802 [2021-11-13 01:28:34,799 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-13 01:28:34,800 INFO L933 BasicCegarLoop]: 4165 mSDtfsCounter, 45 mSDsluCounter, 4100 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.39ms Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 8265 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 9.99ms SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.86ms IncrementalHoareTripleChecker+Time [2021-11-13 01:28:34,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 8265 Invalid, 12 Unknown, 0 Unchecked, 9.99ms Time], IncrementalHoareTripleChecker [1 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 12.86ms Time] [2021-11-13 01:28:34,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5802 states. [2021-11-13 01:28:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5802 to 4978. [2021-11-13 01:28:35,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4978 states, 4462 states have (on average 1.4809502465262214) internal successors, (6608), 4491 states have internal predecessors, (6608), 286 states have call successors, (286), 201 states have call predecessors, (286), 228 states have return successors, (380), 286 states have call predecessors, (380), 284 states have call successors, (380) [2021-11-13 01:28:35,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 7274 transitions. [2021-11-13 01:28:35,143 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 7274 transitions. Word has length 141 [2021-11-13 01:28:35,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-13 01:28:35,143 INFO L470 AbstractCegarLoop]: Abstraction has 4978 states and 7274 transitions. [2021-11-13 01:28:35,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 1 states have call predecessors, (8), 1 states have call successors, (8) [2021-11-13 01:28:35,144 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 7274 transitions. [2021-11-13 01:28:35,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-13 01:28:35,149 INFO L506 BasicCegarLoop]: Found error trace [2021-11-13 01:28:35,149 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:35,167 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (15)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:35,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:35,368 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-13 01:28:35,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-13 01:28:35,369 INFO L85 PathProgramCache]: Analyzing trace with hash 1244161439, now seen corresponding path program 1 times [2021-11-13 01:28:35,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-13 01:28:35,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [801650571] [2021-11-13 01:28:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-13 01:28:35,371 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-13 01:28:35,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat [2021-11-13 01:28:35,372 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-13 01:28:35,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Waiting until timeout for monitored process [2021-11-13 01:28:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 01:28:35,478 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-13 01:28:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-13 01:28:35,886 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-11-13 01:28:35,886 INFO L628 BasicCegarLoop]: Counterexample is feasible [2021-11-13 01:28:35,887 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location errorErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 2 remaining) [2021-11-13 01:28:35,889 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2021-11-13 01:28:35,922 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 (16)] Forceful destruction successful, exit code 0 [2021-11-13 01:28:36,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/mathsat -unsat_core_generation=3 [2021-11-13 01:28:36,106 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-13 01:28:36,112 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-13 01:28:36,191 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) at de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.translateProgramExecution(InlinerBacktranslator.java:203) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:216) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:225) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ModelTranslationContainer.translateProgramExecution(ModelTranslationContainer.java:206) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getProgramExecutionAsString(CounterExampleResult.java:155) at de.uni_freiburg.informatik.ultimate.core.lib.results.CounterExampleResult.getLongDescription(CounterExampleResult.java:134) at de.uni_freiburg.informatik.ultimate.core.coreplugin.services.ResultService.reportResult(ResultService.java:86) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResultReporter.reportResult(CegarLoopResultReporter.java:141) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.reportLocationResults(TraceAbstractionStarter.java:586) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:181) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) 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) [2021-11-13 01:28:36,195 INFO L158 Benchmark]: Toolchain (without parser) took 34364.60ms. Allocated memory was 73.4MB in the beginning and 1.1GB in the end (delta: 1.0GB). Free memory was 36.8MB in the beginning and 887.8MB in the end (delta: -851.0MB). Peak memory consumption was 171.9MB. Max. memory is 16.1GB. [2021-11-13 01:28:36,195 INFO L158 Benchmark]: CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:28:36,195 INFO L158 Benchmark]: CACSL2BoogieTranslator took 4708.26ms. Allocated memory was 73.4MB in the beginning and 245.4MB in the end (delta: 172.0MB). Free memory was 36.6MB in the beginning and 143.2MB in the end (delta: -106.6MB). Peak memory consumption was 94.3MB. Max. memory is 16.1GB. [2021-11-13 01:28:36,196 INFO L158 Benchmark]: Boogie Procedure Inliner took 574.85ms. Allocated memory is still 245.4MB. Free memory was 143.2MB in the beginning and 104.1MB in the end (delta: 39.1MB). Peak memory consumption was 69.5MB. Max. memory is 16.1GB. [2021-11-13 01:28:36,196 INFO L158 Benchmark]: Boogie Preprocessor took 714.79ms. Allocated memory is still 245.4MB. Free memory was 104.1MB in the beginning and 85.6MB in the end (delta: 18.5MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. [2021-11-13 01:28:36,198 INFO L158 Benchmark]: RCFGBuilder took 10139.27ms. Allocated memory was 245.4MB in the beginning and 704.6MB in the end (delta: 459.3MB). Free memory was 85.6MB in the beginning and 255.9MB in the end (delta: -170.3MB). Peak memory consumption was 296.3MB. Max. memory is 16.1GB. [2021-11-13 01:28:36,199 INFO L158 Benchmark]: TraceAbstraction took 18221.52ms. Allocated memory was 704.6MB in the beginning and 1.1GB in the end (delta: 392.2MB). Free memory was 254.9MB in the beginning and 887.8MB in the end (delta: -632.9MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-13 01:28:36,200 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14ms. Allocated memory is still 73.4MB. Free memory is still 53.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 4708.26ms. Allocated memory was 73.4MB in the beginning and 245.4MB in the end (delta: 172.0MB). Free memory was 36.6MB in the beginning and 143.2MB in the end (delta: -106.6MB). Peak memory consumption was 94.3MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 574.85ms. Allocated memory is still 245.4MB. Free memory was 143.2MB in the beginning and 104.1MB in the end (delta: 39.1MB). Peak memory consumption was 69.5MB. Max. memory is 16.1GB. * Boogie Preprocessor took 714.79ms. Allocated memory is still 245.4MB. Free memory was 104.1MB in the beginning and 85.6MB in the end (delta: 18.5MB). Peak memory consumption was 49.3MB. Max. memory is 16.1GB. * RCFGBuilder took 10139.27ms. Allocated memory was 245.4MB in the beginning and 704.6MB in the end (delta: 459.3MB). Free memory was 85.6MB in the beginning and 255.9MB in the end (delta: -170.3MB). Peak memory consumption was 296.3MB. Max. memory is 16.1GB. * TraceAbstraction took 18221.52ms. Allocated memory was 704.6MB in the beginning and 1.1GB in the end (delta: 392.2MB). Free memory was 254.9MB in the beginning and 887.8MB in the end (delta: -632.9MB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.boogie.procedureinliner.backtranslation.InlinerBacktranslator.computeCurrectProc(InlinerBacktranslator.java:230) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-13 01:28:36,258 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4a46f45-2527-4fe1-8602-f4770ebe1186/bin/utaipan-vmNK8stdcF/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: ERROR: ExceptionOrErrorResult: NullPointerException: null