./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs --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 695981a417316c4c07ccb52b1c4d12f1832a3ea99763b6fdb28c03b28d3203ad --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:00:20,269 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:00:20,273 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:00:20,346 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:00:20,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:00:20,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:00:20,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:00:20,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:00:20,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:00:20,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:00:20,377 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:00:20,380 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:00:20,380 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:00:20,384 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:00:20,387 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:00:20,394 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:00:20,397 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:00:20,398 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:00:20,401 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:00:20,412 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:00:20,415 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:00:20,421 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:00:20,425 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:00:20,427 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:00:20,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:00:20,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:00:20,441 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:00:20,444 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:00:20,445 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:00:20,447 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:00:20,447 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:00:20,449 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:00:20,451 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:00:20,453 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:00:20,455 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:00:20,456 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:00:20,457 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:00:20,457 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:00:20,457 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:00:20,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:00:20,460 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:00:20,461 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:00:20,516 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:00:20,517 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:00:20,519 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:00:20,519 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:00:20,519 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:00:20,520 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:00:20,520 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:00:20,520 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:00:20,520 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:00:20,521 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:00:20,529 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:00:20,530 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:00:20,530 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:00:20,531 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:00:20,531 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:00:20,531 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:00:20,532 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:00:20,533 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:00:20,533 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:00:20,533 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:00:20,533 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:00:20,534 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:00:20,534 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:00:20,534 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:00:20,534 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:00:20,535 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:00:20,535 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:00:20,535 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:00:20,536 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:00:20,536 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:00:20,536 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:00:20,536 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:20,537 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:00:20,537 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:00:20,538 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:00:20,538 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:00:20,538 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:00:20,538 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:00:20,539 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:00:20,539 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:00:20,539 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_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 695981a417316c4c07ccb52b1c4d12f1832a3ea99763b6fdb28c03b28d3203ad [2021-11-19 14:00:20,851 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:00:20,880 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:00:20,884 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:00:20,885 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:00:20,887 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:00:20,888 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c [2021-11-19 14:00:20,979 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/data/629ca867a/af65ef433ea24cc4ac1d076a7c0198ad/FLAG3f90d9957 [2021-11-19 14:00:22,211 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:00:22,211 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c [2021-11-19 14:00:22,280 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/data/629ca867a/af65ef433ea24cc4ac1d076a7c0198ad/FLAG3f90d9957 [2021-11-19 14:00:22,442 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/data/629ca867a/af65ef433ea24cc4ac1d076a7c0198ad [2021-11-19 14:00:22,446 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:00:22,447 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:00:22,449 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:22,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:00:22,454 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:00:22,455 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:22" (1/1) ... [2021-11-19 14:00:22,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@dabcfc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:22, skipping insertion in model container [2021-11-19 14:00:22,457 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:00:22" (1/1) ... [2021-11-19 14:00:22,466 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:00:22,766 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:00:25,701 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[378560,378573] [2021-11-19 14:00:25,751 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[383339,383352] [2021-11-19 14:00:26,187 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:26,201 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:00:27,607 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[378560,378573] [2021-11-19 14:00:27,616 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/sv-benchmarks/c/combinations/Problem05_label42+token_ring.09.cil-2.c[383339,383352] [2021-11-19 14:00:27,667 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:00:27,833 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:00:27,833 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27 WrapperNode [2021-11-19 14:00:27,833 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:00:27,835 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:27,835 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:00:27,835 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:00:27,845 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:27,995 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:28,669 INFO L137 Inliner]: procedures = 62, calls = 69, calls flagged for inlining = 39, calls inlined = 39, statements flattened = 13030 [2021-11-19 14:00:28,670 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:00:28,671 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:00:28,671 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:00:28,672 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:00:28,683 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:28,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:28,916 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:28,937 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:29,252 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:29,328 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:29,418 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:29,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:00:29,499 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:00:29,500 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:00:29,500 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:00:29,501 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (1/1) ... [2021-11-19 14:00:29,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:00:29,526 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:29,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:00:29,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:00:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:00:29,720 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:00:29,720 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:00:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:00:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:00:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:00:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:00:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-19 14:00:29,721 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-19 14:00:29,721 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:00:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:00:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:00:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:00:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:00:29,722 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:00:29,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:00:29,723 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:00:29,723 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:00:29,877 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:00:29,879 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:00:38,550 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:00:41,812 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:00:41,812 INFO L301 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-19 14:00:41,817 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:41 BoogieIcfgContainer [2021-11-19 14:00:41,817 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:00:41,819 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:00:41,820 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:00:41,823 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:00:41,824 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:00:22" (1/3) ... [2021-11-19 14:00:41,824 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef2d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:41, skipping insertion in model container [2021-11-19 14:00:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:00:27" (2/3) ... [2021-11-19 14:00:41,825 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fef2d81 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:00:41, skipping insertion in model container [2021-11-19 14:00:41,825 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:00:41" (3/3) ... [2021-11-19 14:00:41,827 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.09.cil-2.c [2021-11-19 14:00:41,832 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:00:41,833 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:00:41,892 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:00:41,900 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 [2021-11-19 14:00:41,900 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:00:41,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2021-11-19 14:00:41,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-19 14:00:41,980 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:41,980 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:41,981 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:41,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:41,992 INFO L85 PathProgramCache]: Analyzing trace with hash -627798454, now seen corresponding path program 1 times [2021-11-19 14:00:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:42,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510806998] [2021-11-19 14:00:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:42,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:42,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:00:42,411 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510806998] [2021-11-19 14:00:42,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510806998] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:42,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:42,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:00:42,414 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427807840] [2021-11-19 14:00:42,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:42,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:00:42,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:42,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:00:42,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:00:42,497 INFO L87 Difference]: Start difference. First operand has 1804 states, 1769 states have (on average 1.9621254946297344) internal successors, (3471), 1774 states have internal predecessors, (3471), 25 states have call successors, (25), 7 states have call predecessors, (25), 7 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-19 14:00:43,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:43,428 INFO L93 Difference]: Finished difference Result 3745 states and 7279 transitions. [2021-11-19 14:00:43,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:00:43,432 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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 59 [2021-11-19 14:00:43,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:43,469 INFO L225 Difference]: With dead ends: 3745 [2021-11-19 14:00:43,469 INFO L226 Difference]: Without dead ends: 1940 [2021-11-19 14:00:43,478 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 [2021-11-19 14:00:43,482 INFO L933 BasicCegarLoop]: 3428 mSDtfsCounter, 3688 mSDsluCounter, 3631 mSDsCounter, 0 mSdLazyCounter, 682 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3688 SdHoareTripleChecker+Valid, 6768 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:43,483 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3688 Valid, 6768 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 682 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:00:43,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1940 states. [2021-11-19 14:00:43,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1940 to 1939. [2021-11-19 14:00:43,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1939 states, 1881 states have (on average 1.9298245614035088) internal successors, (3630), 1885 states have internal predecessors, (3630), 44 states have call successors, (44), 13 states have call predecessors, (44), 12 states have return successors, (42), 41 states have call predecessors, (42), 42 states have call successors, (42) [2021-11-19 14:00:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1939 states to 1939 states and 3716 transitions. [2021-11-19 14:00:43,651 INFO L78 Accepts]: Start accepts. Automaton has 1939 states and 3716 transitions. Word has length 59 [2021-11-19 14:00:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:43,652 INFO L470 AbstractCegarLoop]: Abstraction has 1939 states and 3716 transitions. [2021-11-19 14:00:43,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 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) [2021-11-19 14:00:43,653 INFO L276 IsEmpty]: Start isEmpty. Operand 1939 states and 3716 transitions. [2021-11-19 14:00:43,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:43,669 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:43,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:43,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:00:43,672 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:43,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:43,675 INFO L85 PathProgramCache]: Analyzing trace with hash -226888850, now seen corresponding path program 1 times [2021-11-19 14:00:43,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:43,675 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97266903] [2021-11-19 14:00:43,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:43,676 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:43,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:43,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:43,896 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:43,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97266903] [2021-11-19 14:00:43,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97266903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:43,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285467996] [2021-11-19 14:00:43,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:43,898 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:43,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:43,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:43,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:00:44,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:44,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 847 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:44,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-19 14:00:44,423 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:00:44,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285467996] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:44,659 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:44,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:00:44,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091081247] [2021-11-19 14:00:44,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:44,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:44,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:44,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:44,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:44,669 INFO L87 Difference]: Start difference. First operand 1939 states and 3716 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2021-11-19 14:00:45,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:45,258 INFO L93 Difference]: Finished difference Result 2518 states and 4609 transitions. [2021-11-19 14:00:45,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:45,259 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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 116 [2021-11-19 14:00:45,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:45,277 INFO L225 Difference]: With dead ends: 2518 [2021-11-19 14:00:45,277 INFO L226 Difference]: Without dead ends: 2225 [2021-11-19 14:00:45,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:45,281 INFO L933 BasicCegarLoop]: 3306 mSDtfsCounter, 3473 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3493 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:45,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3493 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-19 14:00:45,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2225 states. [2021-11-19 14:00:45,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2225 to 2219. [2021-11-19 14:00:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2219 states, 2113 states have (on average 1.882158069096072) internal successors, (3977), 2118 states have internal predecessors, (3977), 80 states have call successors, (80), 25 states have call predecessors, (80), 24 states have return successors, (78), 76 states have call predecessors, (78), 78 states have call successors, (78) [2021-11-19 14:00:45,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2219 states to 2219 states and 4135 transitions. [2021-11-19 14:00:45,375 INFO L78 Accepts]: Start accepts. Automaton has 2219 states and 4135 transitions. Word has length 116 [2021-11-19 14:00:45,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:45,375 INFO L470 AbstractCegarLoop]: Abstraction has 2219 states and 4135 transitions. [2021-11-19 14:00:45,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 2 states have internal predecessors, (79), 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) [2021-11-19 14:00:45,376 INFO L276 IsEmpty]: Start isEmpty. Operand 2219 states and 4135 transitions. [2021-11-19 14:00:45,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:45,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:45,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:45,419 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:45,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:45,594 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:45,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1875117356, now seen corresponding path program 1 times [2021-11-19 14:00:45,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:45,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286505908] [2021-11-19 14:00:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:45,596 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:45,733 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:45,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286505908] [2021-11-19 14:00:45,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286505908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:45,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592328193] [2021-11-19 14:00:45,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:45,734 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:45,735 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:45,737 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:45,758 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:00:45,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:45,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 841 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:45,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-19 14:00:46,190 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:46,447 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:00:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592328193] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:46,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:46,448 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:00:46,448 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145787562] [2021-11-19 14:00:46,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:46,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:46,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:46,450 INFO L87 Difference]: Start difference. First operand 2219 states and 4135 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-11-19 14:00:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:46,945 INFO L93 Difference]: Finished difference Result 3352 states and 5878 transitions. [2021-11-19 14:00:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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 116 [2021-11-19 14:00:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:46,969 INFO L225 Difference]: With dead ends: 3352 [2021-11-19 14:00:46,970 INFO L226 Difference]: Without dead ends: 2779 [2021-11-19 14:00:46,973 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:46,977 INFO L933 BasicCegarLoop]: 3294 mSDtfsCounter, 3479 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3481 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:46,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3479 Valid, 3481 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:46,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2779 states. [2021-11-19 14:00:47,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2779 to 2771. [2021-11-19 14:00:47,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2771 states, 2571 states have (on average 1.8121353558926487) internal successors, (4659), 2578 states have internal predecessors, (4659), 150 states have call successors, (150), 49 states have call predecessors, (150), 48 states have return successors, (148), 144 states have call predecessors, (148), 148 states have call successors, (148) [2021-11-19 14:00:47,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2771 states to 2771 states and 4957 transitions. [2021-11-19 14:00:47,114 INFO L78 Accepts]: Start accepts. Automaton has 2771 states and 4957 transitions. Word has length 116 [2021-11-19 14:00:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:47,117 INFO L470 AbstractCegarLoop]: Abstraction has 2771 states and 4957 transitions. [2021-11-19 14:00:47,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 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) [2021-11-19 14:00:47,117 INFO L276 IsEmpty]: Start isEmpty. Operand 2771 states and 4957 transitions. [2021-11-19 14:00:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:47,130 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:47,130 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:47,161 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:47,346 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:47,346 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:47,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash -631418774, now seen corresponding path program 1 times [2021-11-19 14:00:47,347 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:47,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047764727] [2021-11-19 14:00:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:47,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:47,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:47,501 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:47,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047764727] [2021-11-19 14:00:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047764727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:47,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39481107] [2021-11-19 14:00:47,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:47,502 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:47,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:47,503 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:47,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:00:47,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:47,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 835 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:47,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:00:48,165 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:48,427 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:00:48,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39481107] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:48,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:48,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:00:48,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141590712] [2021-11-19 14:00:48,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:48,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:48,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:48,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:48,437 INFO L87 Difference]: Start difference. First operand 2771 states and 4957 transitions. Second operand has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-19 14:00:49,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:49,006 INFO L93 Difference]: Finished difference Result 4996 states and 8366 transitions. [2021-11-19 14:00:49,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:49,006 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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 116 [2021-11-19 14:00:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:49,038 INFO L225 Difference]: With dead ends: 4996 [2021-11-19 14:00:49,038 INFO L226 Difference]: Without dead ends: 3871 [2021-11-19 14:00:49,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:49,053 INFO L933 BasicCegarLoop]: 3304 mSDtfsCounter, 3482 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3482 SdHoareTripleChecker+Valid, 3491 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:49,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3482 Valid, 3491 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:49,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-11-19 14:00:49,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3859. [2021-11-19 14:00:49,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3859 states, 3475 states have (on average 1.7263309352517986) internal successors, (5999), 3486 states have internal predecessors, (5999), 286 states have call successors, (286), 97 states have call predecessors, (286), 96 states have return successors, (284), 276 states have call predecessors, (284), 284 states have call successors, (284) [2021-11-19 14:00:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3859 states to 3859 states and 6569 transitions. [2021-11-19 14:00:49,286 INFO L78 Accepts]: Start accepts. Automaton has 3859 states and 6569 transitions. Word has length 116 [2021-11-19 14:00:49,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:49,287 INFO L470 AbstractCegarLoop]: Abstraction has 3859 states and 6569 transitions. [2021-11-19 14:00:49,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 23.333333333333332) internal successors, (70), 2 states have internal predecessors, (70), 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) [2021-11-19 14:00:49,287 INFO L276 IsEmpty]: Start isEmpty. Operand 3859 states and 6569 transitions. [2021-11-19 14:00:49,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:49,297 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:49,297 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:49,334 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:49,522 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:49,523 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:49,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:49,524 INFO L85 PathProgramCache]: Analyzing trace with hash -547859348, now seen corresponding path program 1 times [2021-11-19 14:00:49,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:49,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256282489] [2021-11-19 14:00:49,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:49,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:49,639 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:49,639 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:49,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256282489] [2021-11-19 14:00:49,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256282489] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:49,640 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118484655] [2021-11-19 14:00:49,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:49,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:49,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:49,643 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:49,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:00:49,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:49,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 829 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:49,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:50,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-19 14:00:50,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:50,393 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:00:50,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118484655] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:50,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:50,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:00:50,394 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581076124] [2021-11-19 14:00:50,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:50,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:50,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:50,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:50,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:50,396 INFO L87 Difference]: Start difference. First operand 3859 states and 6569 transitions. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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) [2021-11-19 14:00:51,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:51,003 INFO L93 Difference]: Finished difference Result 8236 states and 13242 transitions. [2021-11-19 14:00:51,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:51,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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 116 [2021-11-19 14:00:51,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:51,052 INFO L225 Difference]: With dead ends: 8236 [2021-11-19 14:00:51,052 INFO L226 Difference]: Without dead ends: 6023 [2021-11-19 14:00:51,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:51,067 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 3461 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3461 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:51,068 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3461 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:51,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6023 states. [2021-11-19 14:00:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6023 to 6003. [2021-11-19 14:00:51,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6003 states, 5259 states have (on average 1.641186537364518) internal successors, (8631), 5278 states have internal predecessors, (8631), 550 states have call successors, (550), 193 states have call predecessors, (550), 192 states have return successors, (548), 532 states have call predecessors, (548), 548 states have call successors, (548) [2021-11-19 14:00:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6003 states to 6003 states and 9729 transitions. [2021-11-19 14:00:51,411 INFO L78 Accepts]: Start accepts. Automaton has 6003 states and 9729 transitions. Word has length 116 [2021-11-19 14:00:51,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:51,411 INFO L470 AbstractCegarLoop]: Abstraction has 6003 states and 9729 transitions. [2021-11-19 14:00:51,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 2 states have internal predecessors, (91), 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) [2021-11-19 14:00:51,413 INFO L276 IsEmpty]: Start isEmpty. Operand 6003 states and 9729 transitions. [2021-11-19 14:00:51,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:51,425 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:51,426 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:51,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:51,643 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:51,643 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:51,644 INFO L85 PathProgramCache]: Analyzing trace with hash -1882156246, now seen corresponding path program 1 times [2021-11-19 14:00:51,644 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:51,644 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454853597] [2021-11-19 14:00:51,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:51,644 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:51,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:51,763 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:00:51,763 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:51,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454853597] [2021-11-19 14:00:51,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454853597] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:51,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78683946] [2021-11-19 14:00:51,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:51,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:00:51,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:00:51,765 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:00:51,785 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:00:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 823 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:00:51,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:00:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-19 14:00:52,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:00:52,479 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:00:52,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78683946] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:00:52,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:00:52,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:00:52,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572617583] [2021-11-19 14:00:52,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:52,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:52,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:52,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:52,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:52,482 INFO L87 Difference]: Start difference. First operand 6003 states and 9729 transitions. Second operand has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-11-19 14:00:53,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:53,389 INFO L93 Difference]: Finished difference Result 14620 states and 22794 transitions. [2021-11-19 14:00:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:53,390 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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 116 [2021-11-19 14:00:53,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:53,456 INFO L225 Difference]: With dead ends: 14620 [2021-11-19 14:00:53,457 INFO L226 Difference]: Without dead ends: 10263 [2021-11-19 14:00:53,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 229 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:00:53,475 INFO L933 BasicCegarLoop]: 3269 mSDtfsCounter, 3467 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3467 SdHoareTripleChecker+Valid, 3456 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:53,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3467 Valid, 3456 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:53,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10263 states. [2021-11-19 14:00:53,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10263 to 10227. [2021-11-19 14:00:53,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10227 states, 8779 states have (on average 1.5718191137942819) internal successors, (13799), 8814 states have internal predecessors, (13799), 1062 states have call successors, (1062), 385 states have call predecessors, (1062), 384 states have return successors, (1060), 1028 states have call predecessors, (1060), 1060 states have call successors, (1060) [2021-11-19 14:00:53,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10227 states to 10227 states and 15921 transitions. [2021-11-19 14:00:53,906 INFO L78 Accepts]: Start accepts. Automaton has 10227 states and 15921 transitions. Word has length 116 [2021-11-19 14:00:53,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:53,906 INFO L470 AbstractCegarLoop]: Abstraction has 10227 states and 15921 transitions. [2021-11-19 14:00:53,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.333333333333332) internal successors, (85), 2 states have internal predecessors, (85), 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) [2021-11-19 14:00:53,907 INFO L276 IsEmpty]: Start isEmpty. Operand 10227 states and 15921 transitions. [2021-11-19 14:00:53,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-19 14:00:53,927 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:53,928 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:53,969 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:00:54,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 14:00:54,143 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:54,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:54,143 INFO L85 PathProgramCache]: Analyzing trace with hash 193088360, now seen corresponding path program 1 times [2021-11-19 14:00:54,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:54,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12088303] [2021-11-19 14:00:54,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:54,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:54,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-19 14:00:54,247 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:54,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12088303] [2021-11-19 14:00:54,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12088303] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:54,248 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:54,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:00:54,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002461434] [2021-11-19 14:00:54,248 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:54,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:54,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:54,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:54,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:54,250 INFO L87 Difference]: Start difference. First operand 10227 states and 15921 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-19 14:00:55,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:55,060 INFO L93 Difference]: Finished difference Result 16919 states and 26164 transitions. [2021-11-19 14:00:55,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:55,061 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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 116 [2021-11-19 14:00:55,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:55,132 INFO L225 Difference]: With dead ends: 16919 [2021-11-19 14:00:55,132 INFO L226 Difference]: Without dead ends: 12499 [2021-11-19 14:00:55,153 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 [2021-11-19 14:00:55,155 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 100 mSDsluCounter, 3509 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 6616 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:55,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 6616 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:55,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12499 states. [2021-11-19 14:00:55,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12499 to 11811. [2021-11-19 14:00:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11811 states, 10299 states have (on average 1.5946208369744634) internal successors, (16423), 10334 states have internal predecessors, (16423), 1094 states have call successors, (1094), 417 states have call predecessors, (1094), 416 states have return successors, (1092), 1060 states have call predecessors, (1092), 1092 states have call successors, (1092) [2021-11-19 14:00:55,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11811 states to 11811 states and 18609 transitions. [2021-11-19 14:00:55,659 INFO L78 Accepts]: Start accepts. Automaton has 11811 states and 18609 transitions. Word has length 116 [2021-11-19 14:00:55,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:55,659 INFO L470 AbstractCegarLoop]: Abstraction has 11811 states and 18609 transitions. [2021-11-19 14:00:55,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 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) [2021-11-19 14:00:55,664 INFO L276 IsEmpty]: Start isEmpty. Operand 11811 states and 18609 transitions. [2021-11-19 14:00:55,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:00:55,705 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:55,705 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:55,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:00:55,706 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:55,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:55,708 INFO L85 PathProgramCache]: Analyzing trace with hash -920557115, now seen corresponding path program 1 times [2021-11-19 14:00:55,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:55,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853207221] [2021-11-19 14:00:55,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:55,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:55,823 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:00:55,824 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:55,824 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853207221] [2021-11-19 14:00:55,824 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853207221] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:55,824 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:55,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:00:55,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197451191] [2021-11-19 14:00:55,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:55,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:55,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:55,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:55,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:55,827 INFO L87 Difference]: Start difference. First operand 11811 states and 18609 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:00:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:56,952 INFO L93 Difference]: Finished difference Result 31852 states and 49370 transitions. [2021-11-19 14:00:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:56,953 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 157 [2021-11-19 14:00:56,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:00:57,059 INFO L225 Difference]: With dead ends: 31852 [2021-11-19 14:00:57,059 INFO L226 Difference]: Without dead ends: 21687 [2021-11-19 14:00:57,106 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 [2021-11-19 14:00:57,107 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3469 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3469 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:00:57,107 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3469 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:00:57,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21687 states. [2021-11-19 14:00:57,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21687 to 21587. [2021-11-19 14:00:57,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21587 states, 18635 states have (on average 1.5527233700026832) internal successors, (28935), 18702 states have internal predecessors, (28935), 2118 states have call successors, (2118), 833 states have call predecessors, (2118), 832 states have return successors, (2116), 2052 states have call predecessors, (2116), 2116 states have call successors, (2116) [2021-11-19 14:00:58,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21587 states to 21587 states and 33169 transitions. [2021-11-19 14:00:58,023 INFO L78 Accepts]: Start accepts. Automaton has 21587 states and 33169 transitions. Word has length 157 [2021-11-19 14:00:58,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:00:58,025 INFO L470 AbstractCegarLoop]: Abstraction has 21587 states and 33169 transitions. [2021-11-19 14:00:58,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:00:58,026 INFO L276 IsEmpty]: Start isEmpty. Operand 21587 states and 33169 transitions. [2021-11-19 14:00:58,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:00:58,114 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:00:58,114 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:00:58,114 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:00:58,115 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:00:58,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:00:58,115 INFO L85 PathProgramCache]: Analyzing trace with hash -1562256983, now seen corresponding path program 1 times [2021-11-19 14:00:58,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:00:58,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291390146] [2021-11-19 14:00:58,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:00:58,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:00:58,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:00:58,236 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:00:58,236 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:00:58,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291390146] [2021-11-19 14:00:58,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291390146] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:00:58,237 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:00:58,237 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:00:58,237 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298391720] [2021-11-19 14:00:58,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:00:58,238 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:00:58,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:00:58,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:00:58,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:00:58,239 INFO L87 Difference]: Start difference. First operand 21587 states and 33169 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:00:59,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:00:59,917 INFO L93 Difference]: Finished difference Result 60892 states and 93082 transitions. [2021-11-19 14:00:59,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:00:59,918 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 157 [2021-11-19 14:00:59,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:00,122 INFO L225 Difference]: With dead ends: 60892 [2021-11-19 14:01:00,122 INFO L226 Difference]: Without dead ends: 40951 [2021-11-19 14:01:00,208 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 [2021-11-19 14:01:00,210 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3471 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3471 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:00,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3471 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:01:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40951 states. [2021-11-19 14:01:02,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40951 to 40755. [2021-11-19 14:01:02,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40755 states, 34987 states have (on average 1.5239660445308256) internal successors, (53319), 35118 states have internal predecessors, (53319), 4102 states have call successors, (4102), 1665 states have call predecessors, (4102), 1664 states have return successors, (4100), 3972 states have call predecessors, (4100), 4100 states have call successors, (4100) [2021-11-19 14:01:02,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40755 states to 40755 states and 61521 transitions. [2021-11-19 14:01:02,448 INFO L78 Accepts]: Start accepts. Automaton has 40755 states and 61521 transitions. Word has length 157 [2021-11-19 14:01:02,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:02,448 INFO L470 AbstractCegarLoop]: Abstraction has 40755 states and 61521 transitions. [2021-11-19 14:01:02,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:01:02,449 INFO L276 IsEmpty]: Start isEmpty. Operand 40755 states and 61521 transitions. [2021-11-19 14:01:02,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:01:02,564 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:02,565 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:02,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:01:02,566 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:02,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:02,567 INFO L85 PathProgramCache]: Analyzing trace with hash 1482217377, now seen corresponding path program 1 times [2021-11-19 14:01:02,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:02,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842396992] [2021-11-19 14:01:02,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:02,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:02,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:02,659 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:01:02,659 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:02,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842396992] [2021-11-19 14:01:02,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842396992] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:02,660 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:02,660 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:01:02,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211375554] [2021-11-19 14:01:02,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:02,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:02,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:02,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:02,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:02,662 INFO L87 Difference]: Start difference. First operand 40755 states and 61521 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:01:05,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:05,493 INFO L93 Difference]: Finished difference Result 117820 states and 178138 transitions. [2021-11-19 14:01:05,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:05,493 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 157 [2021-11-19 14:01:05,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:05,851 INFO L225 Difference]: With dead ends: 117820 [2021-11-19 14:01:05,852 INFO L226 Difference]: Without dead ends: 78711 [2021-11-19 14:01:05,972 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 [2021-11-19 14:01:05,973 INFO L933 BasicCegarLoop]: 3271 mSDtfsCounter, 3473 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 295 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3473 SdHoareTripleChecker+Valid, 3458 SdHoareTripleChecker+Invalid, 297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 295 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:05,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3473 Valid, 3458 Invalid, 297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 295 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:01:06,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78711 states. [2021-11-19 14:01:09,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78711 to 78323. [2021-11-19 14:01:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78323 states, 67051 states have (on average 1.5034376817646269) internal successors, (100807), 67310 states have internal predecessors, (100807), 7942 states have call successors, (7942), 3329 states have call predecessors, (7942), 3328 states have return successors, (7940), 7684 states have call predecessors, (7940), 7940 states have call successors, (7940) [2021-11-19 14:01:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78323 states to 78323 states and 116689 transitions. [2021-11-19 14:01:09,371 INFO L78 Accepts]: Start accepts. Automaton has 78323 states and 116689 transitions. Word has length 157 [2021-11-19 14:01:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:09,372 INFO L470 AbstractCegarLoop]: Abstraction has 78323 states and 116689 transitions. [2021-11-19 14:01:09,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:01:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 78323 states and 116689 transitions. [2021-11-19 14:01:09,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-11-19 14:01:09,574 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:09,574 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:01:09,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:01:09,575 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:09,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:09,576 INFO L85 PathProgramCache]: Analyzing trace with hash 1573346230, now seen corresponding path program 1 times [2021-11-19 14:01:09,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:09,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725167727] [2021-11-19 14:01:09,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:09,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:09,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:09,649 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-19 14:01:09,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:09,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725167727] [2021-11-19 14:01:09,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725167727] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:01:09,650 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:01:09,650 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-19 14:01:09,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409593268] [2021-11-19 14:01:09,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:09,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:09,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:09,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:09,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-19 14:01:09,654 INFO L87 Difference]: Start difference. First operand 78323 states and 116689 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:01:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:14,194 INFO L93 Difference]: Finished difference Result 229372 states and 343514 transitions. [2021-11-19 14:01:14,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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 157 [2021-11-19 14:01:14,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:14,842 INFO L225 Difference]: With dead ends: 229372 [2021-11-19 14:01:14,843 INFO L226 Difference]: Without dead ends: 152695 [2021-11-19 14:01:15,292 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 [2021-11-19 14:01:15,293 INFO L933 BasicCegarLoop]: 3292 mSDtfsCounter, 3476 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3476 SdHoareTripleChecker+Valid, 3479 SdHoareTripleChecker+Invalid, 298 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:15,293 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3476 Valid, 3479 Invalid, 298 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:01:15,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152695 states. [2021-11-19 14:01:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152695 to 151923. [2021-11-19 14:01:20,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151923 states, 129899 states have (on average 1.4874864317662184) internal successors, (193223), 130414 states have internal predecessors, (193223), 15366 states have call successors, (15366), 6657 states have call predecessors, (15366), 6656 states have return successors, (15364), 14852 states have call predecessors, (15364), 15364 states have call successors, (15364) [2021-11-19 14:01:21,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151923 states to 151923 states and 223953 transitions. [2021-11-19 14:01:21,167 INFO L78 Accepts]: Start accepts. Automaton has 151923 states and 223953 transitions. Word has length 157 [2021-11-19 14:01:21,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:01:21,168 INFO L470 AbstractCegarLoop]: Abstraction has 151923 states and 223953 transitions. [2021-11-19 14:01:21,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 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) [2021-11-19 14:01:21,169 INFO L276 IsEmpty]: Start isEmpty. Operand 151923 states and 223953 transitions. [2021-11-19 14:01:21,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-19 14:01:21,569 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:01:21,570 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-19 14:01:21,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-19 14:01:21,570 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:01:21,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:01:21,571 INFO L85 PathProgramCache]: Analyzing trace with hash 236944544, now seen corresponding path program 1 times [2021-11-19 14:01:21,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:01:21,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576658447] [2021-11-19 14:01:21,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:21,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:01:21,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:21,675 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-19 14:01:21,675 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:01:21,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576658447] [2021-11-19 14:01:21,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576658447] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:21,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654639899] [2021-11-19 14:01:21,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:01:21,676 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:01:21,676 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:01:21,683 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:01:21,702 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4e306002-102c-4461-9471-feaae31a5913/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-19 14:01:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:01:21,920 INFO L263 TraceCheckSpWp]: Trace formula consists of 1085 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-19 14:01:21,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:01:22,321 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 101 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-19 14:01:22,321 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:01:22,719 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 55 proven. 29 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-19 14:01:22,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654639899] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:01:22,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:01:22,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6, 4] total 8 [2021-11-19 14:01:22,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356596638] [2021-11-19 14:01:22,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:01:22,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:01:22,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:01:22,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:01:22,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:22,722 INFO L87 Difference]: Start difference. First operand 151923 states and 223953 transitions. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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) [2021-11-19 14:01:27,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:01:27,270 INFO L93 Difference]: Finished difference Result 229115 states and 342487 transitions. [2021-11-19 14:01:27,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:01:27,270 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 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 179 [2021-11-19 14:01:27,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:01:27,860 INFO L225 Difference]: With dead ends: 229115 [2021-11-19 14:01:27,860 INFO L226 Difference]: Without dead ends: 152439 [2021-11-19 14:01:28,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 364 GetRequests, 358 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-19 14:01:28,086 INFO L933 BasicCegarLoop]: 3413 mSDtfsCounter, 198 mSDsluCounter, 3494 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 6658 SdHoareTripleChecker+Invalid, 543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:01:28,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 6658 Invalid, 543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:01:28,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152439 states.