./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH --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 22ffb61098d8e108d7bca6506429f5e795a7ac60c8cbed943135472a4b174d52 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 05:11:58,556 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 05:11:58,558 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 05:11:58,607 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 05:11:58,608 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 05:11:58,612 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 05:11:58,614 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 05:11:58,618 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 05:11:58,620 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 05:11:58,626 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 05:11:58,627 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 05:11:58,628 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 05:11:58,629 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 05:11:58,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 05:11:58,631 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 05:11:58,633 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 05:11:58,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 05:11:58,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 05:11:58,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 05:11:58,642 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 05:11:58,644 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 05:11:58,649 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 05:11:58,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 05:11:58,652 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 05:11:58,655 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 05:11:58,655 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 05:11:58,656 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 05:11:58,657 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 05:11:58,657 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 05:11:58,658 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 05:11:58,659 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 05:11:58,659 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 05:11:58,660 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 05:11:58,668 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 05:11:58,669 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 05:11:58,670 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 05:11:58,670 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 05:11:58,670 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 05:11:58,671 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 05:11:58,671 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 05:11:58,672 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 05:11:58,673 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 05:11:58,718 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 05:11:58,719 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 05:11:58,719 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 05:11:58,720 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 05:11:58,720 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 05:11:58,720 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 05:11:58,720 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 05:11:58,721 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 05:11:58,721 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 05:11:58,721 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 05:11:58,721 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 05:11:58,722 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 05:11:58,722 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 05:11:58,722 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 05:11:58,722 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 05:11:58,723 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 05:11:58,723 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 05:11:58,724 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 05:11:58,724 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 05:11:58,724 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 05:11:58,724 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 05:11:58,724 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 05:11:58,725 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 05:11:58,725 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 05:11:58,725 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 05:11:58,725 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 05:11:58,725 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 05:11:58,726 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 05:11:58,726 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 05:11:58,726 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 05:11:58,726 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:11:58,727 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 05:11:58,727 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 05:11:58,727 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 05:11:58,727 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 05:11:58,728 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 05:11:58,728 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 05:11:58,728 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 05:11:58,728 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 05:11:58,728 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_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 22ffb61098d8e108d7bca6506429f5e795a7ac60c8cbed943135472a4b174d52 [2021-11-03 05:11:59,029 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 05:11:59,053 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 05:11:59,057 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 05:11:59,058 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 05:11:59,059 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 05:11:59,060 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-11-03 05:11:59,136 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/data/82a64d9fc/aa8c50c9c75b4da6ab3f13d2855fa02c/FLAGe61347752 [2021-11-03 05:11:59,615 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 05:11:59,616 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/sv-benchmarks/c/systemc/token_ring.02.cil-2.c [2021-11-03 05:11:59,643 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/data/82a64d9fc/aa8c50c9c75b4da6ab3f13d2855fa02c/FLAGe61347752 [2021-11-03 05:11:59,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/data/82a64d9fc/aa8c50c9c75b4da6ab3f13d2855fa02c [2021-11-03 05:11:59,958 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 05:11:59,960 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 05:11:59,964 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 05:11:59,964 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 05:11:59,967 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 05:11:59,968 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:11:59" (1/1) ... [2021-11-03 05:11:59,970 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17d08506 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:11:59, skipping insertion in model container [2021-11-03 05:11:59,971 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 05:11:59" (1/1) ... [2021-11-03 05:11:59,978 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 05:12:00,026 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 05:12:00,225 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[366,379] [2021-11-03 05:12:00,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:00,288 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 05:12:00,299 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/sv-benchmarks/c/systemc/token_ring.02.cil-2.c[366,379] [2021-11-03 05:12:00,338 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 05:12:00,353 INFO L208 MainTranslator]: Completed translation [2021-11-03 05:12:00,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00 WrapperNode [2021-11-03 05:12:00,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 05:12:00,355 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 05:12:00,355 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 05:12:00,355 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 05:12:00,362 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,408 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 05:12:00,409 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 05:12:00,410 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 05:12:00,410 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 05:12:00,417 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,418 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,423 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,423 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,435 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,462 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,466 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,472 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 05:12:00,489 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 05:12:00,489 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 05:12:00,490 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 05:12:00,491 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (1/1) ... [2021-11-03 05:12:00,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 05:12:00,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:00,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 05:12:00,575 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 05:12:00,590 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 05:12:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 05:12:00,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 05:12:00,591 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 05:12:02,261 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 05:12:02,262 INFO L299 CfgBuilder]: Removed 105 assume(true) statements. [2021-11-03 05:12:02,266 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:02 BoogieIcfgContainer [2021-11-03 05:12:02,266 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 05:12:02,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 05:12:02,270 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 05:12:02,273 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 05:12:02,273 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 05:11:59" (1/3) ... [2021-11-03 05:12:02,273 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75aea3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:02, skipping insertion in model container [2021-11-03 05:12:02,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 05:12:00" (2/3) ... [2021-11-03 05:12:02,274 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75aea3f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 05:12:02, skipping insertion in model container [2021-11-03 05:12:02,274 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:02" (3/3) ... [2021-11-03 05:12:02,275 INFO L111 eAbstractionObserver]: Analyzing ICFG token_ring.02.cil-2.c [2021-11-03 05:12:02,280 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 05:12:02,280 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-03 05:12:02,326 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 05:12:02,331 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 [2021-11-03 05:12:02,332 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-03 05:12:02,348 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 102 states have (on average 1.588235294117647) internal successors, (162), 104 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:02,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-03 05:12:02,354 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:02,355 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:02,355 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:02,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:02,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1754336666, now seen corresponding path program 1 times [2021-11-03 05:12:02,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:02,370 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109431469] [2021-11-03 05:12:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:02,371 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:02,593 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:02,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109431469] [2021-11-03 05:12:02,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109431469] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:02,594 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:02,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:12:02,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029961149] [2021-11-03 05:12:02,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:02,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:02,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:02,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:02,629 INFO L87 Difference]: Start difference. First operand has 105 states, 102 states have (on average 1.588235294117647) internal successors, (162), 104 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:02,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:02,758 INFO L93 Difference]: Finished difference Result 285 states and 438 transitions. [2021-11-03 05:12:02,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:02,759 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-03 05:12:02,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:02,769 INFO L225 Difference]: With dead ends: 285 [2021-11-03 05:12:02,769 INFO L226 Difference]: Without dead ends: 178 [2021-11-03 05:12:02,772 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:02,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-03 05:12:02,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 168. [2021-11-03 05:12:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 166 states have (on average 1.4819277108433735) internal successors, (246), 167 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 246 transitions. [2021-11-03 05:12:02,819 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 246 transitions. Word has length 19 [2021-11-03 05:12:02,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:02,819 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 246 transitions. [2021-11-03 05:12:02,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 2 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:02,820 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 246 transitions. [2021-11-03 05:12:02,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:12:02,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:02,822 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:12:02,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 05:12:02,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:02,824 INFO L85 PathProgramCache]: Analyzing trace with hash -1002973536, now seen corresponding path program 1 times [2021-11-03 05:12:02,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:02,824 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658792772] [2021-11-03 05:12:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:02,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:02,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:12:02,928 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:02,929 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658792772] [2021-11-03 05:12:02,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658792772] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:02,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:02,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:02,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881789521] [2021-11-03 05:12:02,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:02,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:02,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:02,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:02,933 INFO L87 Difference]: Start difference. First operand 168 states and 246 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:03,139 INFO L93 Difference]: Finished difference Result 529 states and 768 transitions. [2021-11-03 05:12:03,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:03,142 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:12:03,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:03,147 INFO L225 Difference]: With dead ends: 529 [2021-11-03 05:12:03,147 INFO L226 Difference]: Without dead ends: 366 [2021-11-03 05:12:03,149 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2021-11-03 05:12:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 287. [2021-11-03 05:12:03,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 285 states have (on average 1.449122807017544) internal successors, (413), 286 states have internal predecessors, (413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 413 transitions. [2021-11-03 05:12:03,195 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 413 transitions. Word has length 36 [2021-11-03 05:12:03,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:03,195 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 413 transitions. [2021-11-03 05:12:03,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,196 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 413 transitions. [2021-11-03 05:12:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:12:03,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:03,200 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:12:03,201 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 05:12:03,201 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:03,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:03,201 INFO L85 PathProgramCache]: Analyzing trace with hash -83998913, now seen corresponding path program 1 times [2021-11-03 05:12:03,202 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:03,202 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927360696] [2021-11-03 05:12:03,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:03,202 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:03,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:03,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:03,284 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:03,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927360696] [2021-11-03 05:12:03,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927360696] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:03,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:03,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:03,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671629348] [2021-11-03 05:12:03,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:03,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:03,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:03,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:03,287 INFO L87 Difference]: Start difference. First operand 287 states and 413 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:03,439 INFO L93 Difference]: Finished difference Result 901 states and 1285 transitions. [2021-11-03 05:12:03,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:03,440 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:12:03,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:03,446 INFO L225 Difference]: With dead ends: 901 [2021-11-03 05:12:03,446 INFO L226 Difference]: Without dead ends: 622 [2021-11-03 05:12:03,452 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:03,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-11-03 05:12:03,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 498. [2021-11-03 05:12:03,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 496 states have (on average 1.4193548387096775) internal successors, (704), 497 states have internal predecessors, (704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 704 transitions. [2021-11-03 05:12:03,509 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 704 transitions. Word has length 36 [2021-11-03 05:12:03,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:03,510 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 704 transitions. [2021-11-03 05:12:03,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,510 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 704 transitions. [2021-11-03 05:12:03,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-03 05:12:03,522 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:03,523 INFO L513 BasicCegarLoop]: trace histogram [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] [2021-11-03 05:12:03,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 05:12:03,524 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:03,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:03,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1363323648, now seen corresponding path program 1 times [2021-11-03 05:12:03,527 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:03,527 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792882540] [2021-11-03 05:12:03,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:03,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:03,651 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:03,652 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:03,652 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792882540] [2021-11-03 05:12:03,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792882540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:03,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:03,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:03,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346590707] [2021-11-03 05:12:03,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:03,655 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:03,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:03,656 INFO L87 Difference]: Start difference. First operand 498 states and 704 transitions. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:03,704 INFO L93 Difference]: Finished difference Result 872 states and 1264 transitions. [2021-11-03 05:12:03,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:03,704 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-03 05:12:03,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:03,710 INFO L225 Difference]: With dead ends: 872 [2021-11-03 05:12:03,710 INFO L226 Difference]: Without dead ends: 582 [2021-11-03 05:12:03,713 INFO L786 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 [2021-11-03 05:12:03,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-03 05:12:03,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 546. [2021-11-03 05:12:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 544 states have (on average 1.4411764705882353) internal successors, (784), 545 states have internal predecessors, (784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 784 transitions. [2021-11-03 05:12:03,741 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 784 transitions. Word has length 36 [2021-11-03 05:12:03,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:03,742 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 784 transitions. [2021-11-03 05:12:03,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,742 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 784 transitions. [2021-11-03 05:12:03,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-03 05:12:03,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:03,745 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:03,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-03 05:12:03,745 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1444285568, now seen corresponding path program 1 times [2021-11-03 05:12:03,746 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:03,747 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243591055] [2021-11-03 05:12:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:03,747 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:03,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:12:03,855 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:03,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243591055] [2021-11-03 05:12:03,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243591055] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:03,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:03,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:03,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661753802] [2021-11-03 05:12:03,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:03,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:03,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:03,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:03,858 INFO L87 Difference]: Start difference. First operand 546 states and 784 transitions. Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:03,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:03,992 INFO L93 Difference]: Finished difference Result 1878 states and 2714 transitions. [2021-11-03 05:12:03,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:03,993 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-03 05:12:03,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:04,002 INFO L225 Difference]: With dead ends: 1878 [2021-11-03 05:12:04,002 INFO L226 Difference]: Without dead ends: 1342 [2021-11-03 05:12:04,004 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:04,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1342 states. [2021-11-03 05:12:04,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1342 to 992. [2021-11-03 05:12:04,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 990 states have (on average 1.4262626262626263) internal successors, (1412), 991 states have internal predecessors, (1412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1412 transitions. [2021-11-03 05:12:04,068 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1412 transitions. Word has length 52 [2021-11-03 05:12:04,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:04,068 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1412 transitions. [2021-11-03 05:12:04,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 3 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,069 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1412 transitions. [2021-11-03 05:12:04,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-03 05:12:04,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:04,072 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:04,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-03 05:12:04,072 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:04,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:04,073 INFO L85 PathProgramCache]: Analyzing trace with hash 1996877279, now seen corresponding path program 1 times [2021-11-03 05:12:04,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:04,073 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738737249] [2021-11-03 05:12:04,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:04,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:04,141 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:04,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:04,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738737249] [2021-11-03 05:12:04,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738737249] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:04,142 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:04,142 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-03 05:12:04,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105362013] [2021-11-03 05:12:04,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 05:12:04,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:04,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 05:12:04,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:12:04,145 INFO L87 Difference]: Start difference. First operand 992 states and 1412 transitions. Second operand has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:04,423 INFO L93 Difference]: Finished difference Result 2544 states and 3622 transitions. [2021-11-03 05:12:04,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-03 05:12:04,424 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-03 05:12:04,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:04,436 INFO L225 Difference]: With dead ends: 2544 [2021-11-03 05:12:04,437 INFO L226 Difference]: Without dead ends: 1562 [2021-11-03 05:12:04,439 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-11-03 05:12:04,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1562 states. [2021-11-03 05:12:04,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1562 to 1170. [2021-11-03 05:12:04,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1168 states have (on average 1.4349315068493151) internal successors, (1676), 1169 states have internal predecessors, (1676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1676 transitions. [2021-11-03 05:12:04,521 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1676 transitions. Word has length 53 [2021-11-03 05:12:04,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:04,522 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1676 transitions. [2021-11-03 05:12:04,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.833333333333334) internal successors, (53), 6 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1676 transitions. [2021-11-03 05:12:04,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:12:04,526 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:04,527 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:04,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-03 05:12:04,527 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:04,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:04,528 INFO L85 PathProgramCache]: Analyzing trace with hash 836349728, now seen corresponding path program 1 times [2021-11-03 05:12:04,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:04,532 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517365243] [2021-11-03 05:12:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:04,533 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:04,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:04,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:04,638 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:04,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517365243] [2021-11-03 05:12:04,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517365243] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:04,639 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:04,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:04,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339039379] [2021-11-03 05:12:04,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:04,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:04,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:04,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:04,641 INFO L87 Difference]: Start difference. First operand 1170 states and 1676 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:04,723 INFO L93 Difference]: Finished difference Result 1979 states and 2849 transitions. [2021-11-03 05:12:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:12:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:04,731 INFO L225 Difference]: With dead ends: 1979 [2021-11-03 05:12:04,731 INFO L226 Difference]: Without dead ends: 1242 [2021-11-03 05:12:04,733 INFO L786 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 [2021-11-03 05:12:04,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1242 states. [2021-11-03 05:12:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1242 to 1170. [2021-11-03 05:12:04,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1168 states have (on average 1.3955479452054795) internal successors, (1630), 1169 states have internal predecessors, (1630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 1630 transitions. [2021-11-03 05:12:04,839 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 1630 transitions. Word has length 54 [2021-11-03 05:12:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:04,840 INFO L470 AbstractCegarLoop]: Abstraction has 1170 states and 1630 transitions. [2021-11-03 05:12:04,840 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 1630 transitions. [2021-11-03 05:12:04,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-03 05:12:04,843 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:04,843 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:04,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-03 05:12:04,844 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:04,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1809838687, now seen corresponding path program 1 times [2021-11-03 05:12:04,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:04,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745836782] [2021-11-03 05:12:04,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:04,845 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:04,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:04,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:04,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:04,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745836782] [2021-11-03 05:12:04,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745836782] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:04,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:04,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:12:04,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926647287] [2021-11-03 05:12:04,906 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:12:04,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:04,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:12:04,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:04,907 INFO L87 Difference]: Start difference. First operand 1170 states and 1630 transitions. Second operand has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:05,060 INFO L93 Difference]: Finished difference Result 2540 states and 3552 transitions. [2021-11-03 05:12:05,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-03 05:12:05,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-03 05:12:05,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:05,068 INFO L225 Difference]: With dead ends: 2540 [2021-11-03 05:12:05,068 INFO L226 Difference]: Without dead ends: 1380 [2021-11-03 05:12:05,071 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-03 05:12:05,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2021-11-03 05:12:05,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 1227. [2021-11-03 05:12:05,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1227 states, 1225 states have (on average 1.3885714285714286) internal successors, (1701), 1226 states have internal predecessors, (1701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1227 states to 1227 states and 1701 transitions. [2021-11-03 05:12:05,147 INFO L78 Accepts]: Start accepts. Automaton has 1227 states and 1701 transitions. Word has length 54 [2021-11-03 05:12:05,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:05,147 INFO L470 AbstractCegarLoop]: Abstraction has 1227 states and 1701 transitions. [2021-11-03 05:12:05,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.8) internal successors, (54), 5 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1227 states and 1701 transitions. [2021-11-03 05:12:05,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:12:05,151 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:05,151 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:05,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-03 05:12:05,151 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:05,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:05,152 INFO L85 PathProgramCache]: Analyzing trace with hash 2009564879, now seen corresponding path program 1 times [2021-11-03 05:12:05,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:05,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785490507] [2021-11-03 05:12:05,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:05,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:05,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:05,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:05,199 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:05,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785490507] [2021-11-03 05:12:05,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785490507] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:05,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:05,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:05,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143311391] [2021-11-03 05:12:05,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:05,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:05,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:05,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:05,202 INFO L87 Difference]: Start difference. First operand 1227 states and 1701 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:05,282 INFO L93 Difference]: Finished difference Result 2023 states and 2810 transitions. [2021-11-03 05:12:05,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:05,285 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:12:05,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:05,290 INFO L225 Difference]: With dead ends: 2023 [2021-11-03 05:12:05,291 INFO L226 Difference]: Without dead ends: 807 [2021-11-03 05:12:05,293 INFO L786 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 [2021-11-03 05:12:05,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2021-11-03 05:12:05,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 794. [2021-11-03 05:12:05,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 792 states have (on average 1.3345959595959596) internal successors, (1057), 793 states have internal predecessors, (1057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1057 transitions. [2021-11-03 05:12:05,341 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1057 transitions. Word has length 58 [2021-11-03 05:12:05,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:05,341 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1057 transitions. [2021-11-03 05:12:05,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,342 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1057 transitions. [2021-11-03 05:12:05,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:12:05,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:05,344 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:05,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-03 05:12:05,345 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:05,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:05,345 INFO L85 PathProgramCache]: Analyzing trace with hash -1214978738, now seen corresponding path program 1 times [2021-11-03 05:12:05,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:05,347 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938486093] [2021-11-03 05:12:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:05,347 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:05,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:05,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:05,446 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:05,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938486093] [2021-11-03 05:12:05,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938486093] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:05,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:05,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:12:05,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346961351] [2021-11-03 05:12:05,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:12:05,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:05,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:12:05,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:05,449 INFO L87 Difference]: Start difference. First operand 794 states and 1057 transitions. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:05,585 INFO L93 Difference]: Finished difference Result 1672 states and 2214 transitions. [2021-11-03 05:12:05,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:12:05,585 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:12:05,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:05,591 INFO L225 Difference]: With dead ends: 1672 [2021-11-03 05:12:05,591 INFO L226 Difference]: Without dead ends: 926 [2021-11-03 05:12:05,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-11-03 05:12:05,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 926 states. [2021-11-03 05:12:05,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 926 to 794. [2021-11-03 05:12:05,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 792 states have (on average 1.3181818181818181) internal successors, (1044), 793 states have internal predecessors, (1044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 1044 transitions. [2021-11-03 05:12:05,646 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 1044 transitions. Word has length 58 [2021-11-03 05:12:05,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:05,647 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 1044 transitions. [2021-11-03 05:12:05,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,647 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 1044 transitions. [2021-11-03 05:12:05,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-03 05:12:05,650 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:05,650 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:05,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-03 05:12:05,651 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:05,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:05,651 INFO L85 PathProgramCache]: Analyzing trace with hash -74627027, now seen corresponding path program 1 times [2021-11-03 05:12:05,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:05,653 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076874480] [2021-11-03 05:12:05,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:05,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:05,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:05,728 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:05,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:05,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076874480] [2021-11-03 05:12:05,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076874480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:05,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:05,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:05,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657783657] [2021-11-03 05:12:05,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:05,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:05,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:05,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:05,733 INFO L87 Difference]: Start difference. First operand 794 states and 1044 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:05,786 INFO L93 Difference]: Finished difference Result 1363 states and 1798 transitions. [2021-11-03 05:12:05,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:05,787 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-11-03 05:12:05,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:05,791 INFO L225 Difference]: With dead ends: 1363 [2021-11-03 05:12:05,791 INFO L226 Difference]: Without dead ends: 617 [2021-11-03 05:12:05,792 INFO L786 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 [2021-11-03 05:12:05,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2021-11-03 05:12:05,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 605. [2021-11-03 05:12:05,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 603 states have (on average 1.2769485903814262) internal successors, (770), 604 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 770 transitions. [2021-11-03 05:12:05,831 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 770 transitions. Word has length 58 [2021-11-03 05:12:05,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:05,832 INFO L470 AbstractCegarLoop]: Abstraction has 605 states and 770 transitions. [2021-11-03 05:12:05,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 3 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:05,832 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 770 transitions. [2021-11-03 05:12:05,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:12:05,835 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:05,835 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:05,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-03 05:12:05,836 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:05,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1893341921, now seen corresponding path program 1 times [2021-11-03 05:12:05,836 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:05,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860853055] [2021-11-03 05:12:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:05,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:05,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:06,002 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:06,003 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860853055] [2021-11-03 05:12:06,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860853055] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:12:06,008 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100825350] [2021-11-03 05:12:06,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:06,008 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:06,008 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:06,014 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:12:06,039 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 05:12:06,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:06,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:12:06,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:06,547 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:06,547 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100825350] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-03 05:12:07,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2021-11-03 05:12:07,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [8, 6] total 14 [2021-11-03 05:12:07,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538687487] [2021-11-03 05:12:07,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:07,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:07,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:07,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:12:07,073 INFO L87 Difference]: Start difference. First operand 605 states and 770 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:07,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:07,166 INFO L93 Difference]: Finished difference Result 1173 states and 1511 transitions. [2021-11-03 05:12:07,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:07,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:12:07,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:07,171 INFO L225 Difference]: With dead ends: 1173 [2021-11-03 05:12:07,171 INFO L226 Difference]: Without dead ends: 795 [2021-11-03 05:12:07,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-11-03 05:12:07,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 795 states. [2021-11-03 05:12:07,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 795 to 670. [2021-11-03 05:12:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 670 states, 668 states have (on average 1.2649700598802396) internal successors, (845), 669 states have internal predecessors, (845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:07,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 670 states to 670 states and 845 transitions. [2021-11-03 05:12:07,223 INFO L78 Accepts]: Start accepts. Automaton has 670 states and 845 transitions. Word has length 59 [2021-11-03 05:12:07,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:07,224 INFO L470 AbstractCegarLoop]: Abstraction has 670 states and 845 transitions. [2021-11-03 05:12:07,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:07,224 INFO L276 IsEmpty]: Start isEmpty. Operand 670 states and 845 transitions. [2021-11-03 05:12:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:12:07,226 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:07,226 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-03 05:12:07,264 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-03 05:12:07,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:07,449 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:07,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:07,450 INFO L85 PathProgramCache]: Analyzing trace with hash 351847116, now seen corresponding path program 1 times [2021-11-03 05:12:07,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:07,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775742310] [2021-11-03 05:12:07,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:07,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,494 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:07,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775742310] [2021-11-03 05:12:07,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775742310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:12:07,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25984158] [2021-11-03 05:12:07,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:07,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:07,495 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:07,495 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:12:07,516 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-03 05:12:07,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:07,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-03 05:12:07,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,791 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:07,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25984158] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:07,917 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:12:07,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [5] total 7 [2021-11-03 05:12:07,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032843422] [2021-11-03 05:12:07,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:07,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:07,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:07,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:12:07,919 INFO L87 Difference]: Start difference. First operand 670 states and 845 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:08,012 INFO L93 Difference]: Finished difference Result 1335 states and 1686 transitions. [2021-11-03 05:12:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:12:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:08,017 INFO L225 Difference]: With dead ends: 1335 [2021-11-03 05:12:08,017 INFO L226 Difference]: Without dead ends: 788 [2021-11-03 05:12:08,018 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-11-03 05:12:08,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2021-11-03 05:12:08,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 675. [2021-11-03 05:12:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 673 states have (on average 1.2719167904903417) internal successors, (856), 674 states have internal predecessors, (856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 856 transitions. [2021-11-03 05:12:08,069 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 856 transitions. Word has length 59 [2021-11-03 05:12:08,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:08,069 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 856 transitions. [2021-11-03 05:12:08,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 856 transitions. [2021-11-03 05:12:08,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-03 05:12:08,071 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:08,072 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 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] [2021-11-03 05:12:08,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:08,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-03 05:12:08,287 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:08,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:08,287 INFO L85 PathProgramCache]: Analyzing trace with hash -306429559, now seen corresponding path program 1 times [2021-11-03 05:12:08,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:08,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21825220] [2021-11-03 05:12:08,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:08,288 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:08,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:08,327 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-03 05:12:08,327 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:08,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21825220] [2021-11-03 05:12:08,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21825220] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:08,327 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:08,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 05:12:08,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215757251] [2021-11-03 05:12:08,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-03 05:12:08,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:08,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-03 05:12:08,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-03 05:12:08,332 INFO L87 Difference]: Start difference. First operand 675 states and 856 transitions. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:08,416 INFO L93 Difference]: Finished difference Result 1546 states and 1961 transitions. [2021-11-03 05:12:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-03 05:12:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-03 05:12:08,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:08,421 INFO L225 Difference]: With dead ends: 1546 [2021-11-03 05:12:08,421 INFO L226 Difference]: Without dead ends: 882 [2021-11-03 05:12:08,423 INFO L786 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 [2021-11-03 05:12:08,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 882 states. [2021-11-03 05:12:08,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 882 to 882. [2021-11-03 05:12:08,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 880 states have (on average 1.2386363636363635) internal successors, (1090), 881 states have internal predecessors, (1090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1090 transitions. [2021-11-03 05:12:08,508 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1090 transitions. Word has length 59 [2021-11-03 05:12:08,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:08,508 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1090 transitions. [2021-11-03 05:12:08,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 2 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1090 transitions. [2021-11-03 05:12:08,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:12:08,510 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:08,510 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 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] [2021-11-03 05:12:08,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-03 05:12:08,510 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash -1250762718, now seen corresponding path program 1 times [2021-11-03 05:12:08,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:08,511 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319127298] [2021-11-03 05:12:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:08,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:08,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:08,558 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:12:08,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:08,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319127298] [2021-11-03 05:12:08,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319127298] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:08,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:08,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 05:12:08,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980325825] [2021-11-03 05:12:08,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:08,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:08,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:08,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:08,561 INFO L87 Difference]: Start difference. First operand 882 states and 1090 transitions. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:08,670 INFO L93 Difference]: Finished difference Result 1797 states and 2223 transitions. [2021-11-03 05:12:08,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:08,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:12:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:08,677 INFO L225 Difference]: With dead ends: 1797 [2021-11-03 05:12:08,677 INFO L226 Difference]: Without dead ends: 1081 [2021-11-03 05:12:08,680 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:08,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2021-11-03 05:12:08,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 882. [2021-11-03 05:12:08,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 880 states have (on average 1.2193181818181817) internal successors, (1073), 881 states have internal predecessors, (1073), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1073 transitions. [2021-11-03 05:12:08,752 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1073 transitions. Word has length 60 [2021-11-03 05:12:08,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:08,753 INFO L470 AbstractCegarLoop]: Abstraction has 882 states and 1073 transitions. [2021-11-03 05:12:08,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,753 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1073 transitions. [2021-11-03 05:12:08,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-03 05:12:08,755 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:08,755 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:08,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-03 05:12:08,756 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:08,756 INFO L85 PathProgramCache]: Analyzing trace with hash 1906842549, now seen corresponding path program 1 times [2021-11-03 05:12:08,756 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:08,756 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518108608] [2021-11-03 05:12:08,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:08,757 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-03 05:12:08,820 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:08,820 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518108608] [2021-11-03 05:12:08,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518108608] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:08,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:08,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:12:08,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104256341] [2021-11-03 05:12:08,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:08,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:08,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:08,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:08,822 INFO L87 Difference]: Start difference. First operand 882 states and 1073 transitions. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:08,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:08,957 INFO L93 Difference]: Finished difference Result 1611 states and 1958 transitions. [2021-11-03 05:12:08,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:08,957 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-11-03 05:12:08,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:08,963 INFO L225 Difference]: With dead ends: 1611 [2021-11-03 05:12:08,963 INFO L226 Difference]: Without dead ends: 959 [2021-11-03 05:12:08,964 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:08,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-11-03 05:12:09,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 832. [2021-11-03 05:12:09,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 830 states have (on average 1.1927710843373494) internal successors, (990), 831 states have internal predecessors, (990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 990 transitions. [2021-11-03 05:12:09,033 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 990 transitions. Word has length 60 [2021-11-03 05:12:09,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:09,033 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 990 transitions. [2021-11-03 05:12:09,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,033 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 990 transitions. [2021-11-03 05:12:09,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-03 05:12:09,035 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:09,035 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:09,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-11-03 05:12:09,036 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:09,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:09,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1301190324, now seen corresponding path program 1 times [2021-11-03 05:12:09,036 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:09,037 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684946558] [2021-11-03 05:12:09,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:09,037 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:09,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:09,101 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:09,101 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:09,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684946558] [2021-11-03 05:12:09,101 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684946558] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:09,101 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:09,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 05:12:09,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189545562] [2021-11-03 05:12:09,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 05:12:09,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:09,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 05:12:09,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:09,104 INFO L87 Difference]: Start difference. First operand 832 states and 990 transitions. Second operand has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:09,224 INFO L93 Difference]: Finished difference Result 1899 states and 2240 transitions. [2021-11-03 05:12:09,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 05:12:09,225 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-11-03 05:12:09,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:09,231 INFO L225 Difference]: With dead ends: 1899 [2021-11-03 05:12:09,231 INFO L226 Difference]: Without dead ends: 1182 [2021-11-03 05:12:09,232 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-03 05:12:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2021-11-03 05:12:09,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 980. [2021-11-03 05:12:09,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 980 states, 978 states have (on average 1.1687116564417177) internal successors, (1143), 979 states have internal predecessors, (1143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 980 states to 980 states and 1143 transitions. [2021-11-03 05:12:09,309 INFO L78 Accepts]: Start accepts. Automaton has 980 states and 1143 transitions. Word has length 62 [2021-11-03 05:12:09,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:09,310 INFO L470 AbstractCegarLoop]: Abstraction has 980 states and 1143 transitions. [2021-11-03 05:12:09,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.5) internal successors, (62), 4 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,310 INFO L276 IsEmpty]: Start isEmpty. Operand 980 states and 1143 transitions. [2021-11-03 05:12:09,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-03 05:12:09,312 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:09,312 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:09,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-11-03 05:12:09,312 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:09,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:09,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1071877186, now seen corresponding path program 1 times [2021-11-03 05:12:09,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:09,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064469789] [2021-11-03 05:12:09,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:09,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:09,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-03 05:12:09,408 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:09,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064469789] [2021-11-03 05:12:09,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064469789] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:09,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 05:12:09,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-03 05:12:09,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578891354] [2021-11-03 05:12:09,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 05:12:09,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:09,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 05:12:09,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:09,409 INFO L87 Difference]: Start difference. First operand 980 states and 1143 transitions. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:09,615 INFO L93 Difference]: Finished difference Result 3260 states and 3799 transitions. [2021-11-03 05:12:09,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-03 05:12:09,615 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-03 05:12:09,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:09,628 INFO L225 Difference]: With dead ends: 3260 [2021-11-03 05:12:09,628 INFO L226 Difference]: Without dead ends: 2605 [2021-11-03 05:12:09,630 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 05:12:09,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2605 states. [2021-11-03 05:12:09,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2605 to 1871. [2021-11-03 05:12:09,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1871 states, 1869 states have (on average 1.169609416800428) internal successors, (2186), 1870 states have internal predecessors, (2186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1871 states to 1871 states and 2186 transitions. [2021-11-03 05:12:09,841 INFO L78 Accepts]: Start accepts. Automaton has 1871 states and 2186 transitions. Word has length 79 [2021-11-03 05:12:09,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:09,842 INFO L470 AbstractCegarLoop]: Abstraction has 1871 states and 2186 transitions. [2021-11-03 05:12:09,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:09,842 INFO L276 IsEmpty]: Start isEmpty. Operand 1871 states and 2186 transitions. [2021-11-03 05:12:09,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-03 05:12:09,845 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:09,845 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:09,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-03 05:12:09,845 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:09,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:09,846 INFO L85 PathProgramCache]: Analyzing trace with hash -254785937, now seen corresponding path program 1 times [2021-11-03 05:12:09,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:09,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970249907] [2021-11-03 05:12:09,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:09,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:09,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 05:12:09,964 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 05:12:09,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970249907] [2021-11-03 05:12:09,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970249907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 05:12:09,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231145624] [2021-11-03 05:12:09,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:09,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:09,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 05:12:09,969 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 05:12:09,991 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-03 05:12:10,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 05:12:10,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-03 05:12:10,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 05:12:10,594 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:12:10,594 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 05:12:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-03 05:12:11,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231145624] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 05:12:11,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2021-11-03 05:12:11,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 5] imperfect sequences [7] total 12 [2021-11-03 05:12:11,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666990275] [2021-11-03 05:12:11,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-03 05:12:11,252 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 05:12:11,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-03 05:12:11,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-11-03 05:12:11,252 INFO L87 Difference]: Start difference. First operand 1871 states and 2186 transitions. Second operand has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:11,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 05:12:11,478 INFO L93 Difference]: Finished difference Result 3811 states and 4445 transitions. [2021-11-03 05:12:11,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 05:12:11,478 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-11-03 05:12:11,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 05:12:11,489 INFO L225 Difference]: With dead ends: 3811 [2021-11-03 05:12:11,489 INFO L226 Difference]: Without dead ends: 2084 [2021-11-03 05:12:11,492 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-11-03 05:12:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2084 states. [2021-11-03 05:12:11,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2084 to 1604. [2021-11-03 05:12:11,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1604 states, 1602 states have (on average 1.1591760299625469) internal successors, (1857), 1603 states have internal predecessors, (1857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1604 states to 1604 states and 1857 transitions. [2021-11-03 05:12:11,669 INFO L78 Accepts]: Start accepts. Automaton has 1604 states and 1857 transitions. Word has length 80 [2021-11-03 05:12:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 05:12:11,669 INFO L470 AbstractCegarLoop]: Abstraction has 1604 states and 1857 transitions. [2021-11-03 05:12:11,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.375) internal successors, (123), 7 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 05:12:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 1604 states and 1857 transitions. [2021-11-03 05:12:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-03 05:12:11,671 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 05:12:11,671 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:11,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-03 05:12:11,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 05:12:11,893 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 05:12:11,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 05:12:11,893 INFO L85 PathProgramCache]: Analyzing trace with hash -66422993, now seen corresponding path program 1 times [2021-11-03 05:12:11,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 05:12:11,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611182340] [2021-11-03 05:12:11,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 05:12:11,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 05:12:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:12:11,918 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-11-03 05:12:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-11-03 05:12:12,006 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-11-03 05:12:12,006 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-11-03 05:12:12,007 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:12:12,009 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 05:12:12,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-11-03 05:12:12,012 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 05:12:12,016 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 05:12:12,138 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 05:12:12 BoogieIcfgContainer [2021-11-03 05:12:12,138 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 05:12:12,139 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 05:12:12,139 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 05:12:12,139 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 05:12:12,139 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 05:12:02" (3/4) ... [2021-11-03 05:12:12,141 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-11-03 05:12:12,241 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/witness.graphml [2021-11-03 05:12:12,242 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 05:12:12,243 INFO L168 Benchmark]: Toolchain (without parser) took 12282.08 ms. Allocated memory was 125.8 MB in the beginning and 234.9 MB in the end (delta: 109.1 MB). Free memory was 91.4 MB in the beginning and 118.5 MB in the end (delta: -27.1 MB). Peak memory consumption was 82.6 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,243 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory was 53.1 MB in the beginning and 53.1 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 05:12:12,244 INFO L168 Benchmark]: CACSL2BoogieTranslator took 389.78 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 99.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,244 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 96.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,245 INFO L168 Benchmark]: Boogie Preprocessor took 78.96 ms. Allocated memory is still 125.8 MB. Free memory was 96.1 MB in the beginning and 93.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,245 INFO L168 Benchmark]: RCFGBuilder took 1777.40 ms. Allocated memory is still 125.8 MB. Free memory was 93.4 MB in the beginning and 73.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,245 INFO L168 Benchmark]: TraceAbstraction took 9868.77 ms. Allocated memory was 125.8 MB in the beginning and 234.9 MB in the end (delta: 109.1 MB). Free memory was 73.1 MB in the beginning and 133.2 MB in the end (delta: -60.1 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,246 INFO L168 Benchmark]: Witness Printer took 103.19 ms. Allocated memory is still 234.9 MB. Free memory was 133.2 MB in the beginning and 118.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. [2021-11-03 05:12:12,248 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 77.6 MB. Free memory was 53.1 MB in the beginning and 53.1 MB in the end (delta: 30.3 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 389.78 ms. Allocated memory is still 125.8 MB. Free memory was 91.2 MB in the beginning and 99.1 MB in the end (delta: -7.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 54.19 ms. Allocated memory is still 125.8 MB. Free memory was 99.1 MB in the beginning and 96.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 78.96 ms. Allocated memory is still 125.8 MB. Free memory was 96.1 MB in the beginning and 93.4 MB in the end (delta: 2.7 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 1777.40 ms. Allocated memory is still 125.8 MB. Free memory was 93.4 MB in the beginning and 73.8 MB in the end (delta: 19.6 MB). Peak memory consumption was 60.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 9868.77 ms. Allocated memory was 125.8 MB in the beginning and 234.9 MB in the end (delta: 109.1 MB). Free memory was 73.1 MB in the beginning and 133.2 MB in the end (delta: -60.1 MB). Peak memory consumption was 48.7 MB. Max. memory is 16.1 GB. * Witness Printer took 103.19 ms. Allocated memory is still 234.9 MB. Free memory was 133.2 MB in the beginning and 118.5 MB in the end (delta: 14.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int m_pc = 0; [L17] int t1_pc = 0; [L18] int t2_pc = 0; [L19] int m_st ; [L20] int t1_st ; [L21] int t2_st ; [L22] int m_i ; [L23] int t1_i ; [L24] int t2_i ; [L25] int M_E = 2; [L26] int T1_E = 2; [L27] int T2_E = 2; [L28] int E_M = 2; [L29] int E_1 = 2; [L30] int E_2 = 2; [L35] int token ; [L37] int local ; [L602] int __retres1 ; [L516] m_i = 1 [L517] t1_i = 1 [L518] t2_i = 1 [L543] int kernel_st ; [L544] int tmp ; [L545] int tmp___0 ; [L549] kernel_st = 0 [L235] COND TRUE m_i == 1 [L236] m_st = 0 [L240] COND TRUE t1_i == 1 [L241] t1_st = 0 [L245] COND TRUE t2_i == 1 [L246] t2_st = 0 [L348] COND FALSE !(M_E == 0) [L353] COND FALSE !(T1_E == 0) [L358] COND FALSE !(T2_E == 0) [L363] COND FALSE !(E_M == 0) [L368] COND FALSE !(E_1 == 0) [L373] COND FALSE !(E_2 == 0) [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L170] COND FALSE !(m_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L180] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L189] COND FALSE !(t1_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L208] COND FALSE !(t2_pc == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L386] COND FALSE !(M_E == 1) [L391] COND FALSE !(T1_E == 1) [L396] COND FALSE !(T2_E == 1) [L401] COND FALSE !(E_M == 1) [L406] COND FALSE !(E_1 == 1) [L411] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L557] COND TRUE 1 [L560] kernel_st = 1 [L281] int tmp ; VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND FALSE !(\read(tmp_ndt_1)) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=0, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L309] COND TRUE t1_st == 0 [L310] int tmp_ndt_2; [L311] tmp_ndt_2 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_2) [L314] t1_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L98] COND TRUE t1_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=0, t1_st=1, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L109] COND TRUE 1 [L111] t1_pc = 1 [L112] t1_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=0, token=0] [L323] COND TRUE t2_st == 0 [L324] int tmp_ndt_3; [L325] tmp_ndt_3 = __VERIFIER_nondet_int() [L326] COND TRUE \read(tmp_ndt_3) [L328] t2_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L134] COND TRUE t2_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=0, t2_st=1, token=0] [L145] COND TRUE 1 [L147] t2_pc = 1 [L148] t2_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_1) [L300] m_st = 1 [L40] int tmp_var = __VERIFIER_nondet_int(); [L42] COND TRUE m_pc == 0 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L53] COND TRUE 1 [L56] token = __VERIFIER_nondet_int() [L57] local = token [L58] E_1 = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L170] COND FALSE !(m_pc == 1) VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L180] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L189] COND TRUE t1_pc == 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L190] COND TRUE E_1 == 1 [L191] __retres1 = 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND TRUE \read(tmp___0) [L438] t1_st = 0 [L205] int __retres1 ; VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L208] COND TRUE t2_pc == 1 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L209] COND FALSE !(E_2 == 1) VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L218] __retres1 = 0 VAL [E_1=1, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=0, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L60] E_1 = 2 [L61] m_pc = 1 [L62] m_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=0, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L309] COND TRUE t1_st == 0 [L310] int tmp_ndt_2; [L311] tmp_ndt_2 = __VERIFIER_nondet_int() [L312] COND TRUE \read(tmp_ndt_2) [L314] t1_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L98] COND FALSE !(t1_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=0] [L101] COND TRUE t1_pc == 1 [L117] token += 1 [L118] E_2 = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L170] COND TRUE m_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L171] COND FALSE !(E_M == 1) VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L180] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND FALSE !(\read(tmp)) [L186] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L189] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L190] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L199] __retres1 = 0 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L208] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L209] COND TRUE E_2 == 1 [L210] __retres1 = 1 VAL [E_1=2, E_2=1, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=1] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND TRUE \read(tmp___1) [L446] t2_st = 0 [L120] E_2 = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=1, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L109] COND TRUE 1 [L111] t1_pc = 1 [L112] t1_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=0, token=1] [L323] COND TRUE t2_st == 0 [L324] int tmp_ndt_3; [L325] tmp_ndt_3 = __VERIFIER_nondet_int() [L326] COND TRUE \read(tmp_ndt_3) [L328] t2_st = 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L134] COND FALSE !(t2_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=1] [L137] COND TRUE t2_pc == 1 [L153] token += 1 [L154] E_M = 1 [L421] int tmp ; [L422] int tmp___0 ; [L423] int tmp___1 ; [L167] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L170] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L171] COND TRUE E_M == 1 [L172] __retres1 = 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=2, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L182] return (__retres1); [L427] tmp = is_master_triggered() [L429] COND TRUE \read(tmp) [L430] m_st = 0 [L186] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L189] COND TRUE t1_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L190] COND FALSE !(E_1 == 1) VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L199] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L201] return (__retres1); [L435] tmp___0 = is_transmit1_triggered() [L437] COND FALSE !(\read(tmp___0)) [L205] int __retres1 ; VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L208] COND TRUE t2_pc == 1 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L209] COND FALSE !(E_2 == 1) VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L218] __retres1 = 0 VAL [E_1=2, E_2=2, E_M=1, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L220] return (__retres1); [L443] tmp___1 = is_transmit2_triggered() [L445] COND FALSE !(\read(tmp___1)) [L156] E_M = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=1, token=2] [L145] COND TRUE 1 [L147] t2_pc = 1 [L148] t2_st = 2 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L285] COND TRUE 1 [L255] int __retres1 ; [L258] COND TRUE m_st == 0 [L259] __retres1 = 1 [L276] return (__retres1); [L288] tmp = exists_runnable_thread() [L290] COND TRUE \read(tmp) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=0, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L295] COND TRUE m_st == 0 [L296] int tmp_ndt_1; [L297] tmp_ndt_1 = __VERIFIER_nondet_int() [L298] COND TRUE \read(tmp_ndt_1) [L300] m_st = 1 [L40] int tmp_var = __VERIFIER_nondet_int(); [L42] COND FALSE !(m_pc == 0) VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L45] COND TRUE m_pc == 1 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L67] COND FALSE !(token != local + 2) [L72] COND TRUE tmp_var <= 5 [L73] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L78] COND TRUE tmp_var <= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L79] COND TRUE tmp_var >= 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L80] COND TRUE tmp_var == 5 VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] [L12] reach_error() VAL [E_1=2, E_2=2, E_M=2, local=0, M_E=2, m_i=1, m_pc=1, m_st=1, T1_E=2, t1_i=1, t1_pc=1, t1_st=2, T2_E=2, t2_i=1, t2_pc=1, t2_st=2, token=2] - UnprovableResult [Line: 12]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 105 locations, 2 error locations. Started 1 CEGAR loops. OverallTime: 9.6s, OverallIterations: 20, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 2.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 3222 SDtfs, 3809 SDslu, 3900 SDs, 0 SdLazy, 765 SolverSat, 207 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 503 GetRequests, 429 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1871occurred in iteration=18, InterpolantAutomatonStates: 86, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 19 MinimizatonAttempts, 3353 StatesRemovedByMinimization, 18 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 3.3s InterpolantComputationTime, 1312 NumberOfCodeBlocks, 1312 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 1403 ConstructedInterpolants, 0 QuantifiedInterpolants, 4238 SizeOfPredicates, 6 NumberOfNonLiveVariables, 973 ConjunctsInSsa, 30 ConjunctsInUnsatCore, 25 InterpolantComputations, 21 PerfectInterpolantSequences, 300/321 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-11-03 05:12:12,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1585d7ff-454a-494e-bb5f-febb2a082e57/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE