./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V --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 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:35:06,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:35:06,481 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:35:06,514 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:35:06,515 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:35:06,516 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:35:06,518 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:35:06,520 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:35:06,522 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:35:06,523 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:35:06,524 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:35:06,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:35:06,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:35:06,528 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:35:06,529 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:35:06,531 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:35:06,532 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:35:06,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:35:06,535 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:35:06,538 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:35:06,540 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:35:06,541 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:35:06,543 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:35:06,544 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:35:06,548 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:35:06,548 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:35:06,549 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:35:06,550 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:35:06,551 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:35:06,552 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:35:06,552 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:35:06,553 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:35:06,554 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:35:06,555 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:35:06,556 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:35:06,557 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:35:06,558 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:35:06,558 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:35:06,559 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:35:06,560 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:35:06,561 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:35:06,562 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:35:06,589 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:35:06,590 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:35:06,590 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:35:06,591 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:35:06,592 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:35:06,592 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:35:06,592 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:35:06,593 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:35:06,593 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:35:06,594 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:35:06,594 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:35:06,595 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:35:06,595 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:35:06,595 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:35:06,596 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:35:06,596 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:35:06,597 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:35:06,597 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:35:06,598 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:35:06,598 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:35:06,599 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:35:06,599 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:35:06,599 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:35:06,600 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:35:06,600 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:35:06,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:35:06,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:35:06,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:35:06,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:35:06,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:35:06,603 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:35:06,603 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:35:06,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:35:06,604 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:35:06,604 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:35:06,605 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:35:06,605 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:35:06,605 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:35:06,606 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:35:06,606 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:35:06,607 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:35:06,607 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_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 52e4ee61a76abd07bd19c87e00a938922ca891ef038e845cba6c6b4d21ef1798 [2021-11-23 02:35:06,881 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:35:06,909 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:35:06,912 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:35:06,913 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:35:06,914 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:35:06,916 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c [2021-11-23 02:35:07,000 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/data/b388d9554/c540da1c0cfa4c59856a5b2ea74c07e6/FLAGd0d61c162 [2021-11-23 02:35:07,945 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:35:07,945 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c [2021-11-23 02:35:08,003 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/data/b388d9554/c540da1c0cfa4c59856a5b2ea74c07e6/FLAGd0d61c162 [2021-11-23 02:35:08,328 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/data/b388d9554/c540da1c0cfa4c59856a5b2ea74c07e6 [2021-11-23 02:35:08,332 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:35:08,334 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:35:08,336 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:35:08,336 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:35:08,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:35:08,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:08" (1/1) ... [2021-11-23 02:35:08,342 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18db23c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:08, skipping insertion in model container [2021-11-23 02:35:08,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:35:08" (1/1) ... [2021-11-23 02:35:08,352 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:35:08,596 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:35:10,882 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2021-11-23 02:35:10,916 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2021-11-23 02:35:11,186 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:35:11,197 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:35:12,461 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[378560,378573] [2021-11-23 02:35:12,482 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/sv-benchmarks/c/combinations/Problem05_label42+token_ring.06.cil-1.c[383339,383352] [2021-11-23 02:35:12,510 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:35:12,598 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:35:12,598 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12 WrapperNode [2021-11-23 02:35:12,599 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:35:12,600 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:35:12,600 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:35:12,600 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:35:12,613 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:12,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,200 INFO L137 Inliner]: procedures = 56, calls = 60, calls flagged for inlining = 33, calls inlined = 33, statements flattened = 12856 [2021-11-23 02:35:13,201 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:35:13,202 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:35:13,202 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:35:13,202 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:35:13,292 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,292 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,420 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,420 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,669 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,753 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,776 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,973 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:35:13,975 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:35:13,975 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:35:13,975 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:35:13,985 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (1/1) ... [2021-11-23 02:35:13,994 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:35:14,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:14,018 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:35:14,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:35:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:35:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-23 02:35:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-23 02:35:14,080 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:35:14,080 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:35:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-23 02:35:14,081 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-23 02:35:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-23 02:35:14,081 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-23 02:35:14,081 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-23 02:35:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-23 02:35:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-23 02:35:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-23 02:35:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-23 02:35:14,082 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-23 02:35:14,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:35:14,083 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:35:14,083 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:35:14,280 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:35:14,282 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:35:21,539 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:35:23,933 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:35:23,934 INFO L301 CfgBuilder]: Removed 10 assume(true) statements. [2021-11-23 02:35:23,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:23 BoogieIcfgContainer [2021-11-23 02:35:23,940 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:35:23,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:35:23,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:35:23,948 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:35:23,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:35:08" (1/3) ... [2021-11-23 02:35:23,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f3d860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:23, skipping insertion in model container [2021-11-23 02:35:23,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:35:12" (2/3) ... [2021-11-23 02:35:23,950 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@18f3d860 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:35:23, skipping insertion in model container [2021-11-23 02:35:23,950 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:35:23" (3/3) ... [2021-11-23 02:35:23,951 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label42+token_ring.06.cil-1.c [2021-11-23 02:35:23,961 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:35:23,962 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:35:24,031 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:35:24,040 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:35:24,041 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:35:24,119 INFO L276 IsEmpty]: Start isEmpty. Operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) [2021-11-23 02:35:24,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-23 02:35:24,134 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:24,136 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:24,137 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:24,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:24,143 INFO L85 PathProgramCache]: Analyzing trace with hash 11915254, now seen corresponding path program 1 times [2021-11-23 02:35:24,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:24,154 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126755046] [2021-11-23 02:35:24,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:24,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:24,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:24,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:35:24,605 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:24,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126755046] [2021-11-23 02:35:24,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126755046] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:24,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:24,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:35:24,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083651933] [2021-11-23 02:35:24,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:24,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:35:24,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:35:24,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:35:24,679 INFO L87 Difference]: Start difference. First operand has 1771 states, 1739 states have (on average 1.968372627947096) internal successors, (3423), 1744 states have internal predecessors, (3423), 22 states have call successors, (22), 7 states have call predecessors, (22), 7 states have return successors, (22), 21 states have call predecessors, (22), 22 states have call successors, (22) Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:35:25,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:25,648 INFO L93 Difference]: Finished difference Result 3646 states and 7111 transitions. [2021-11-23 02:35:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:35:25,650 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 50 [2021-11-23 02:35:25,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:25,685 INFO L225 Difference]: With dead ends: 3646 [2021-11-23 02:35:25,685 INFO L226 Difference]: Without dead ends: 1874 [2021-11-23 02:35:25,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:35:25,701 INFO L933 BasicCegarLoop]: 3338 mSDtfsCounter, 3589 mSDsluCounter, 3535 mSDsCounter, 0 mSdLazyCounter, 634 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3589 SdHoareTripleChecker+Valid, 6600 SdHoareTripleChecker+Invalid, 648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 634 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:25,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3589 Valid, 6600 Invalid, 648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 634 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:35:25,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1874 states. [2021-11-23 02:35:25,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1874 to 1873. [2021-11-23 02:35:25,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1873 states, 1821 states have (on average 1.9406919275123558) internal successors, (3534), 1825 states have internal predecessors, (3534), 38 states have call successors, (38), 13 states have call predecessors, (38), 12 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2021-11-23 02:35:25,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1873 states to 1873 states and 3608 transitions. [2021-11-23 02:35:25,863 INFO L78 Accepts]: Start accepts. Automaton has 1873 states and 3608 transitions. Word has length 50 [2021-11-23 02:35:25,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:25,863 INFO L470 AbstractCegarLoop]: Abstraction has 1873 states and 3608 transitions. [2021-11-23 02:35:25,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:35:25,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1873 states and 3608 transitions. [2021-11-23 02:35:25,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:35:25,871 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:25,872 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:25,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:35:25,872 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:25,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:25,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1376567230, now seen corresponding path program 1 times [2021-11-23 02:35:25,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:25,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186137649] [2021-11-23 02:35:25,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:25,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:26,078 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:35:26,079 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:26,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186137649] [2021-11-23 02:35:26,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186137649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:26,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286351433] [2021-11-23 02:35:26,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:26,080 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:26,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:26,089 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:26,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:35:26,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:26,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 637 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:35:26,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:26,535 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:35:26,535 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:26,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286351433] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:26,542 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:26,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:35:26,543 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738434599] [2021-11-23 02:35:26,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:26,544 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:26,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:26,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:26,551 INFO L87 Difference]: Start difference. First operand 1873 states and 3608 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:27,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:27,081 INFO L93 Difference]: Finished difference Result 2320 states and 4279 transitions. [2021-11-23 02:35:27,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:27,082 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-23 02:35:27,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:27,111 INFO L225 Difference]: With dead ends: 2320 [2021-11-23 02:35:27,112 INFO L226 Difference]: Without dead ends: 2093 [2021-11-23 02:35:27,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:27,115 INFO L933 BasicCegarLoop]: 3255 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3397 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:27,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3397 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:27,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2093 states. [2021-11-23 02:35:27,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2093 to 2087. [2021-11-23 02:35:27,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2087 states, 1993 states have (on average 1.8991470145509282) internal successors, (3785), 1998 states have internal predecessors, (3785), 68 states have call successors, (68), 25 states have call predecessors, (68), 24 states have return successors, (66), 64 states have call predecessors, (66), 66 states have call successors, (66) [2021-11-23 02:35:27,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2087 states to 2087 states and 3919 transitions. [2021-11-23 02:35:27,239 INFO L78 Accepts]: Start accepts. Automaton has 2087 states and 3919 transitions. Word has length 95 [2021-11-23 02:35:27,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:27,240 INFO L470 AbstractCegarLoop]: Abstraction has 2087 states and 3919 transitions. [2021-11-23 02:35:27,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 2 states have internal predecessors, (67), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:27,241 INFO L276 IsEmpty]: Start isEmpty. Operand 2087 states and 3919 transitions. [2021-11-23 02:35:27,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:35:27,249 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:27,250 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:27,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-23 02:35:27,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:27,464 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:27,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:27,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1837915426, now seen corresponding path program 1 times [2021-11-23 02:35:27,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:27,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332299896] [2021-11-23 02:35:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:27,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:27,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:35:27,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332299896] [2021-11-23 02:35:27,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332299896] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2052080096] [2021-11-23 02:35:27,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:27,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:27,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:27,577 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:27,583 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:35:27,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:27,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 631 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:35:27,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:27,884 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:35:27,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:27,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2052080096] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:27,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:27,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:35:27,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896421551] [2021-11-23 02:35:27,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:27,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:27,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:27,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:27,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:27,887 INFO L87 Difference]: Start difference. First operand 2087 states and 3919 transitions. Second operand has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:28,365 INFO L93 Difference]: Finished difference Result 2956 states and 5218 transitions. [2021-11-23 02:35:28,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-23 02:35:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:28,391 INFO L225 Difference]: With dead ends: 2956 [2021-11-23 02:35:28,391 INFO L226 Difference]: Without dead ends: 2515 [2021-11-23 02:35:28,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:28,399 INFO L933 BasicCegarLoop]: 3254 mSDtfsCounter, 3428 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3428 SdHoareTripleChecker+Valid, 3396 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:28,400 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3428 Valid, 3396 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:28,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2515 states. [2021-11-23 02:35:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2515 to 2507. [2021-11-23 02:35:28,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2507 states, 2331 states have (on average 1.833976833976834) internal successors, (4275), 2338 states have internal predecessors, (4275), 126 states have call successors, (126), 49 states have call predecessors, (126), 48 states have return successors, (124), 120 states have call predecessors, (124), 124 states have call successors, (124) [2021-11-23 02:35:28,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2507 states to 2507 states and 4525 transitions. [2021-11-23 02:35:28,536 INFO L78 Accepts]: Start accepts. Automaton has 2507 states and 4525 transitions. Word has length 95 [2021-11-23 02:35:28,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:28,539 INFO L470 AbstractCegarLoop]: Abstraction has 2507 states and 4525 transitions. [2021-11-23 02:35:28,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.333333333333332) internal successors, (58), 2 states have internal predecessors, (58), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:28,539 INFO L276 IsEmpty]: Start isEmpty. Operand 2507 states and 4525 transitions. [2021-11-23 02:35:28,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:35:28,549 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:28,549 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:28,592 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:28,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:28,766 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:28,767 INFO L85 PathProgramCache]: Analyzing trace with hash 222970814, now seen corresponding path program 1 times [2021-11-23 02:35:28,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:28,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483588158] [2021-11-23 02:35:28,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:28,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:28,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:35:28,880 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:28,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483588158] [2021-11-23 02:35:28,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [483588158] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:28,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1760907524] [2021-11-23 02:35:28,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:28,882 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:28,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:28,883 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:28,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:35:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:29,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 625 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:35:29,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:29,220 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:35:29,220 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:29,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1760907524] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:29,220 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:29,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:35:29,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837844930] [2021-11-23 02:35:29,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:29,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:29,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:29,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:29,222 INFO L87 Difference]: Start difference. First operand 2507 states and 4525 transitions. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:29,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:29,722 INFO L93 Difference]: Finished difference Result 4204 states and 7046 transitions. [2021-11-23 02:35:29,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:29,723 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 95 [2021-11-23 02:35:29,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:29,749 INFO L225 Difference]: With dead ends: 4204 [2021-11-23 02:35:29,749 INFO L226 Difference]: Without dead ends: 3343 [2021-11-23 02:35:29,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:29,759 INFO L933 BasicCegarLoop]: 3221 mSDtfsCounter, 3425 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3425 SdHoareTripleChecker+Valid, 3363 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:29,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3425 Valid, 3363 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:29,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3343 states. [2021-11-23 02:35:30,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3343 to 3331. [2021-11-23 02:35:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3331 states, 2995 states have (on average 1.7465776293823039) internal successors, (5231), 3006 states have internal predecessors, (5231), 238 states have call successors, (238), 97 states have call predecessors, (238), 96 states have return successors, (236), 228 states have call predecessors, (236), 236 states have call successors, (236) [2021-11-23 02:35:30,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3331 states to 3331 states and 5705 transitions. [2021-11-23 02:35:30,094 INFO L78 Accepts]: Start accepts. Automaton has 3331 states and 5705 transitions. Word has length 95 [2021-11-23 02:35:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:30,095 INFO L470 AbstractCegarLoop]: Abstraction has 3331 states and 5705 transitions. [2021-11-23 02:35:30,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 2 states have internal predecessors, (61), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:35:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 3331 states and 5705 transitions. [2021-11-23 02:35:30,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-23 02:35:30,102 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:30,103 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:30,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:30,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:30,317 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:30,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:30,317 INFO L85 PathProgramCache]: Analyzing trace with hash -1400746274, now seen corresponding path program 1 times [2021-11-23 02:35:30,318 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:30,318 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1658806807] [2021-11-23 02:35:30,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:30,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:30,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2021-11-23 02:35:30,417 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:30,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1658806807] [2021-11-23 02:35:30,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1658806807] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:30,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:30,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:30,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320252209] [2021-11-23 02:35:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:30,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:30,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:30,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:30,420 INFO L87 Difference]: Start difference. First operand 3331 states and 5705 transitions. Second operand has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:35:30,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:30,960 INFO L93 Difference]: Finished difference Result 4647 states and 7668 transitions. [2021-11-23 02:35:30,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:30,960 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 95 [2021-11-23 02:35:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:30,987 INFO L225 Difference]: With dead ends: 4647 [2021-11-23 02:35:30,987 INFO L226 Difference]: Without dead ends: 3771 [2021-11-23 02:35:30,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:30,993 INFO L933 BasicCegarLoop]: 3283 mSDtfsCounter, 73 mSDsluCounter, 3452 mSDsCounter, 0 mSdLazyCounter, 506 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 6496 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 506 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:30,993 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 6496 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 506 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:30,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3771 states. [2021-11-23 02:35:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3771 to 3615. [2021-11-23 02:35:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3263 states have (on average 1.7428746552252528) internal successors, (5687), 3274 states have internal predecessors, (5687), 246 states have call successors, (246), 105 states have call predecessors, (246), 104 states have return successors, (244), 236 states have call predecessors, (244), 244 states have call successors, (244) [2021-11-23 02:35:31,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 6177 transitions. [2021-11-23 02:35:31,146 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 6177 transitions. Word has length 95 [2021-11-23 02:35:31,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:31,147 INFO L470 AbstractCegarLoop]: Abstraction has 3615 states and 6177 transitions. [2021-11-23 02:35:31,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.333333333333332) internal successors, (55), 3 states have internal predecessors, (55), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:35:31,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 6177 transitions. [2021-11-23 02:35:31,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:35:31,155 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:31,155 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 02:35:31,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:35:31,156 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:31,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:31,157 INFO L85 PathProgramCache]: Analyzing trace with hash -1903348241, now seen corresponding path program 1 times [2021-11-23 02:35:31,157 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:31,157 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24615480] [2021-11-23 02:35:31,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:31,157 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:31,239 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:35:31,240 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:31,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24615480] [2021-11-23 02:35:31,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24615480] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:31,240 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:31,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:31,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996048548] [2021-11-23 02:35:31,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:31,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:31,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:31,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:31,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:31,244 INFO L87 Difference]: Start difference. First operand 3615 states and 6177 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:31,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:31,779 INFO L93 Difference]: Finished difference Result 7480 states and 11970 transitions. [2021-11-23 02:35:31,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:31,779 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-23 02:35:31,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:31,820 INFO L225 Difference]: With dead ends: 7480 [2021-11-23 02:35:31,820 INFO L226 Difference]: Without dead ends: 5511 [2021-11-23 02:35:31,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:31,830 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3417 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3417 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:31,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3417 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:35:31,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5511 states. [2021-11-23 02:35:32,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5511 to 5483. [2021-11-23 02:35:32,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5483 states, 4803 states have (on average 1.6537580678742452) internal successors, (7943), 4822 states have internal predecessors, (7943), 470 states have call successors, (470), 209 states have call predecessors, (470), 208 states have return successors, (468), 452 states have call predecessors, (468), 468 states have call successors, (468) [2021-11-23 02:35:32,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5483 states to 5483 states and 8881 transitions. [2021-11-23 02:35:32,094 INFO L78 Accepts]: Start accepts. Automaton has 5483 states and 8881 transitions. Word has length 127 [2021-11-23 02:35:32,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:32,095 INFO L470 AbstractCegarLoop]: Abstraction has 5483 states and 8881 transitions. [2021-11-23 02:35:32,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:32,095 INFO L276 IsEmpty]: Start isEmpty. Operand 5483 states and 8881 transitions. [2021-11-23 02:35:32,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:35:32,109 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:32,109 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 02:35:32,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-23 02:35:32,110 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:32,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:32,110 INFO L85 PathProgramCache]: Analyzing trace with hash 2119137817, now seen corresponding path program 1 times [2021-11-23 02:35:32,110 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:32,111 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618286555] [2021-11-23 02:35:32,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:32,111 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:32,189 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:35:32,189 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:32,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618286555] [2021-11-23 02:35:32,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618286555] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:32,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:32,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:32,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943676192] [2021-11-23 02:35:32,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:32,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:32,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:32,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:32,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:32,194 INFO L87 Difference]: Start difference. First operand 5483 states and 8881 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:32,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:32,865 INFO L93 Difference]: Finished difference Result 13012 states and 20058 transitions. [2021-11-23 02:35:32,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:32,866 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-23 02:35:32,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:32,940 INFO L225 Difference]: With dead ends: 13012 [2021-11-23 02:35:32,940 INFO L226 Difference]: Without dead ends: 9175 [2021-11-23 02:35:32,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:32,959 INFO L933 BasicCegarLoop]: 3223 mSDtfsCounter, 3419 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3419 SdHoareTripleChecker+Valid, 3365 SdHoareTripleChecker+Invalid, 279 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:32,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3419 Valid, 3365 Invalid, 279 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:32,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9175 states. [2021-11-23 02:35:33,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9175 to 9123. [2021-11-23 02:35:33,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9123 states, 7803 states have (on average 1.575676022042804) internal successors, (12295), 7838 states have internal predecessors, (12295), 902 states have call successors, (902), 417 states have call predecessors, (902), 416 states have return successors, (900), 868 states have call predecessors, (900), 900 states have call successors, (900) [2021-11-23 02:35:33,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9123 states to 9123 states and 14097 transitions. [2021-11-23 02:35:33,416 INFO L78 Accepts]: Start accepts. Automaton has 9123 states and 14097 transitions. Word has length 127 [2021-11-23 02:35:33,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:33,418 INFO L470 AbstractCegarLoop]: Abstraction has 9123 states and 14097 transitions. [2021-11-23 02:35:33,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:33,419 INFO L276 IsEmpty]: Start isEmpty. Operand 9123 states and 14097 transitions. [2021-11-23 02:35:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-23 02:35:33,448 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:33,448 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2021-11-23 02:35:33,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:35:33,449 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1785271813, now seen corresponding path program 1 times [2021-11-23 02:35:33,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:33,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095739680] [2021-11-23 02:35:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:33,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:33,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:35:33,525 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:33,526 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095739680] [2021-11-23 02:35:33,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095739680] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:33,526 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:35:33,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:35:33,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815314206] [2021-11-23 02:35:33,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:33,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:33,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:33,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:33,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:33,529 INFO L87 Difference]: Start difference. First operand 9123 states and 14097 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:34,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:34,689 INFO L93 Difference]: Finished difference Result 23788 states and 35642 transitions. [2021-11-23 02:35:34,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:34,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 127 [2021-11-23 02:35:34,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:34,766 INFO L225 Difference]: With dead ends: 23788 [2021-11-23 02:35:34,767 INFO L226 Difference]: Without dead ends: 16311 [2021-11-23 02:35:34,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:35:34,805 INFO L933 BasicCegarLoop]: 3238 mSDtfsCounter, 3422 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3380 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:34,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3380 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:34,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16311 states. [2021-11-23 02:35:35,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16311 to 16211. [2021-11-23 02:35:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16211 states, 13643 states have (on average 1.5157223484570843) internal successors, (20679), 13710 states have internal predecessors, (20679), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-23 02:35:35,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16211 states to 16211 states and 24145 transitions. [2021-11-23 02:35:35,511 INFO L78 Accepts]: Start accepts. Automaton has 16211 states and 24145 transitions. Word has length 127 [2021-11-23 02:35:35,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:35,512 INFO L470 AbstractCegarLoop]: Abstraction has 16211 states and 24145 transitions. [2021-11-23 02:35:35,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 3 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:35:35,512 INFO L276 IsEmpty]: Start isEmpty. Operand 16211 states and 24145 transitions. [2021-11-23 02:35:35,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:35:35,578 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:35,578 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:35,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:35:35,579 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:35,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:35,579 INFO L85 PathProgramCache]: Analyzing trace with hash 2017122193, now seen corresponding path program 1 times [2021-11-23 02:35:35,580 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:35,580 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580780046] [2021-11-23 02:35:35,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:35,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 10 proven. 45 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:35:35,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:35,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580780046] [2021-11-23 02:35:35,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580780046] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:35,698 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114495548] [2021-11-23 02:35:35,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:35,698 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:35,698 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:35,701 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:35,723 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:35:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:35,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 824 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:35:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:36,173 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 97 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 02:35:36,173 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:36,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114495548] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:36,173 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:36,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:35:36,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817382768] [2021-11-23 02:35:36,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:36,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:36,175 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:36,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:36,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:36,176 INFO L87 Difference]: Start difference. First operand 16211 states and 24145 transitions. Second operand has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:35:37,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:37,311 INFO L93 Difference]: Finished difference Result 23755 states and 35511 transitions. [2021-11-23 02:35:37,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:37,311 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-23 02:35:37,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:37,380 INFO L225 Difference]: With dead ends: 23755 [2021-11-23 02:35:37,381 INFO L226 Difference]: Without dead ends: 16279 [2021-11-23 02:35:37,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:37,413 INFO L933 BasicCegarLoop]: 3332 mSDtfsCounter, 140 mSDsluCounter, 3440 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 6532 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:37,413 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 6532 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:37,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16279 states. [2021-11-23 02:35:38,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16279 to 16147. [2021-11-23 02:35:38,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16147 states, 13579 states have (on average 1.4993003903085647) internal successors, (20359), 13646 states have internal predecessors, (20359), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-23 02:35:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16147 states to 16147 states and 23825 transitions. [2021-11-23 02:35:38,253 INFO L78 Accepts]: Start accepts. Automaton has 16147 states and 23825 transitions. Word has length 146 [2021-11-23 02:35:38,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:38,254 INFO L470 AbstractCegarLoop]: Abstraction has 16147 states and 23825 transitions. [2021-11-23 02:35:38,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 40.0) internal successors, (120), 3 states have internal predecessors, (120), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:35:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 16147 states and 23825 transitions. [2021-11-23 02:35:38,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:35:38,331 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:38,331 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:38,369 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:38,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:38,544 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:38,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:38,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1170885233, now seen corresponding path program 1 times [2021-11-23 02:35:38,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:38,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450219833] [2021-11-23 02:35:38,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:38,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 43 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:35:38,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450219833] [2021-11-23 02:35:38,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450219833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:38,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289454739] [2021-11-23 02:35:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:38,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:38,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:38,652 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:38,787 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:35:38,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:38,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:35:38,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:39,147 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 70 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:35:39,148 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:39,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289454739] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:39,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:39,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:35:39,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427341558] [2021-11-23 02:35:39,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:39,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:39,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:39,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:39,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:39,150 INFO L87 Difference]: Start difference. First operand 16147 states and 23825 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:40,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:40,069 INFO L93 Difference]: Finished difference Result 23659 states and 35031 transitions. [2021-11-23 02:35:40,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:40,070 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-23 02:35:40,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:40,136 INFO L225 Difference]: With dead ends: 23659 [2021-11-23 02:35:40,137 INFO L226 Difference]: Without dead ends: 16215 [2021-11-23 02:35:40,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:40,175 INFO L933 BasicCegarLoop]: 3327 mSDtfsCounter, 156 mSDsluCounter, 3439 mSDsCounter, 0 mSdLazyCounter, 514 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 6526 SdHoareTripleChecker+Invalid, 516 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 514 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:40,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 6526 Invalid, 516 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 514 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16215 states. [2021-11-23 02:35:40,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16215 to 16083. [2021-11-23 02:35:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16083 states, 13515 states have (on average 1.482722900480947) internal successors, (20039), 13582 states have internal predecessors, (20039), 1734 states have call successors, (1734), 833 states have call predecessors, (1734), 832 states have return successors, (1732), 1668 states have call predecessors, (1732), 1732 states have call successors, (1732) [2021-11-23 02:35:40,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16083 states to 16083 states and 23505 transitions. [2021-11-23 02:35:40,914 INFO L78 Accepts]: Start accepts. Automaton has 16083 states and 23505 transitions. Word has length 146 [2021-11-23 02:35:40,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:40,915 INFO L470 AbstractCegarLoop]: Abstraction has 16083 states and 23505 transitions. [2021-11-23 02:35:40,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:40,915 INFO L276 IsEmpty]: Start isEmpty. Operand 16083 states and 23505 transitions. [2021-11-23 02:35:40,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:35:40,968 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:40,968 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:41,007 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:41,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:35:41,185 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:41,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:41,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1359265454, now seen corresponding path program 1 times [2021-11-23 02:35:41,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:41,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607537924] [2021-11-23 02:35:41,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:41,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:41,302 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 42 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:35:41,302 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607537924] [2021-11-23 02:35:41,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607537924] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:41,303 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085778102] [2021-11-23 02:35:41,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:41,303 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:41,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:41,305 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:41,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:35:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:41,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 833 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:35:41,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:41,757 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 69 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:35:41,757 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:41,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085778102] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:41,757 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:41,758 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:35:41,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338836491] [2021-11-23 02:35:41,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:41,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:41,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:41,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:41,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:41,762 INFO L87 Difference]: Start difference. First operand 16083 states and 23505 transitions. Second operand has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:42,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:42,845 INFO L93 Difference]: Finished difference Result 27201 states and 38574 transitions. [2021-11-23 02:35:42,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:42,846 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-23 02:35:42,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:42,919 INFO L225 Difference]: With dead ends: 27201 [2021-11-23 02:35:42,920 INFO L226 Difference]: Without dead ends: 19853 [2021-11-23 02:35:42,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:42,940 INFO L933 BasicCegarLoop]: 3227 mSDtfsCounter, 3422 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3422 SdHoareTripleChecker+Valid, 3266 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:42,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3422 Valid, 3266 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:35:42,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19853 states. [2021-11-23 02:35:43,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19853 to 19853. [2021-11-23 02:35:43,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19853 states, 16905 states have (on average 1.4237799467613133) internal successors, (24069), 16972 states have internal predecessors, (24069), 1860 states have call successors, (1860), 1087 states have call predecessors, (1860), 1086 states have return successors, (1858), 1794 states have call predecessors, (1858), 1858 states have call successors, (1858) [2021-11-23 02:35:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19853 states to 19853 states and 27787 transitions. [2021-11-23 02:35:43,672 INFO L78 Accepts]: Start accepts. Automaton has 19853 states and 27787 transitions. Word has length 146 [2021-11-23 02:35:43,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:43,673 INFO L470 AbstractCegarLoop]: Abstraction has 19853 states and 27787 transitions. [2021-11-23 02:35:43,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.0) internal successors, (99), 3 states have internal predecessors, (99), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (10), 2 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:43,673 INFO L276 IsEmpty]: Start isEmpty. Operand 19853 states and 27787 transitions. [2021-11-23 02:35:43,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:35:43,717 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:43,718 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:43,756 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:43,932 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:43,933 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:43,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:43,933 INFO L85 PathProgramCache]: Analyzing trace with hash -375064123, now seen corresponding path program 1 times [2021-11-23 02:35:43,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:43,933 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104854540] [2021-11-23 02:35:43,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:43,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:43,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:44,022 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 47 trivial. 0 not checked. [2021-11-23 02:35:44,022 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:44,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104854540] [2021-11-23 02:35:44,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104854540] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:44,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138901627] [2021-11-23 02:35:44,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:44,023 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:44,024 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:44,024 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:44,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:35:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:44,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 836 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:35:44,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 71 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:35:44,466 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:44,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1138901627] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:44,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:44,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:35:44,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333595126] [2021-11-23 02:35:44,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:44,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:44,469 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:44,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:44,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:44,470 INFO L87 Difference]: Start difference. First operand 19853 states and 27787 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:45,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:45,745 INFO L93 Difference]: Finished difference Result 44457 states and 61892 transitions. [2021-11-23 02:35:45,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:45,746 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 146 [2021-11-23 02:35:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:45,877 INFO L225 Difference]: With dead ends: 44457 [2021-11-23 02:35:45,877 INFO L226 Difference]: Without dead ends: 26251 [2021-11-23 02:35:45,925 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:45,926 INFO L933 BasicCegarLoop]: 3230 mSDtfsCounter, 80 mSDsluCounter, 3434 mSDsCounter, 0 mSdLazyCounter, 490 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 6427 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:45,926 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 6427 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 490 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:45,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26251 states. [2021-11-23 02:35:46,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26251 to 21813. [2021-11-23 02:35:46,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21813 states, 18733 states have (on average 1.44563070517269) internal successors, (27081), 18801 states have internal predecessors, (27081), 1926 states have call successors, (1926), 1153 states have call predecessors, (1926), 1152 states have return successors, (1924), 1859 states have call predecessors, (1924), 1924 states have call successors, (1924) [2021-11-23 02:35:46,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21813 states to 21813 states and 30931 transitions. [2021-11-23 02:35:46,916 INFO L78 Accepts]: Start accepts. Automaton has 21813 states and 30931 transitions. Word has length 146 [2021-11-23 02:35:46,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:46,917 INFO L470 AbstractCegarLoop]: Abstraction has 21813 states and 30931 transitions. [2021-11-23 02:35:46,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:46,918 INFO L276 IsEmpty]: Start isEmpty. Operand 21813 states and 30931 transitions. [2021-11-23 02:35:46,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-23 02:35:46,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:46,963 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:47,005 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:47,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:47,180 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1042335357, now seen corresponding path program 2 times [2021-11-23 02:35:47,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:47,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853452677] [2021-11-23 02:35:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:47,181 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:47,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 6 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2021-11-23 02:35:47,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:47,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853452677] [2021-11-23 02:35:47,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853452677] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:47,282 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427138631] [2021-11-23 02:35:47,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:35:47,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:47,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:47,284 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:47,303 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:35:47,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-23 02:35:47,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:35:47,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 830 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:35:47,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:47,877 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 75 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:35:47,878 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:47,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427138631] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:47,878 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:47,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:35:47,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001144164] [2021-11-23 02:35:47,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:47,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:47,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:47,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:47,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:47,880 INFO L87 Difference]: Start difference. First operand 21813 states and 30931 transitions. Second operand has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:35:49,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:49,126 INFO L93 Difference]: Finished difference Result 40347 states and 56949 transitions. [2021-11-23 02:35:49,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:49,127 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 146 [2021-11-23 02:35:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:49,244 INFO L225 Difference]: With dead ends: 40347 [2021-11-23 02:35:49,244 INFO L226 Difference]: Without dead ends: 30135 [2021-11-23 02:35:49,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:35:49,278 INFO L933 BasicCegarLoop]: 3308 mSDtfsCounter, 116 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 6521 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:49,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 6521 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:35:49,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30135 states. [2021-11-23 02:35:50,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30135 to 25525. [2021-11-23 02:35:50,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25525 states, 22189 states have (on average 1.4771733741944206) internal successors, (32777), 22257 states have internal predecessors, (32777), 2054 states have call successors, (2054), 1281 states have call predecessors, (2054), 1280 states have return successors, (2052), 1987 states have call predecessors, (2052), 2052 states have call successors, (2052) [2021-11-23 02:35:50,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25525 states to 25525 states and 36883 transitions. [2021-11-23 02:35:50,669 INFO L78 Accepts]: Start accepts. Automaton has 25525 states and 36883 transitions. Word has length 146 [2021-11-23 02:35:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:50,670 INFO L470 AbstractCegarLoop]: Abstraction has 25525 states and 36883 transitions. [2021-11-23 02:35:50,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 33.666666666666664) internal successors, (101), 3 states have internal predecessors, (101), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:35:50,670 INFO L276 IsEmpty]: Start isEmpty. Operand 25525 states and 36883 transitions. [2021-11-23 02:35:50,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:35:50,833 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:50,834 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:50,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:51,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-23 02:35:51,061 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:51,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:51,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1623809248, now seen corresponding path program 1 times [2021-11-23 02:35:51,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:51,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207259221] [2021-11-23 02:35:51,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:51,062 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:51,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:51,141 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 41 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-23 02:35:51,141 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207259221] [2021-11-23 02:35:51,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207259221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:51,141 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49884504] [2021-11-23 02:35:51,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:51,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:51,142 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:51,143 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:51,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:35:51,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:51,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 843 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 02:35:51,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:51,607 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:35:51,607 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:51,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49884504] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:51,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:51,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 8 [2021-11-23 02:35:51,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590408324] [2021-11-23 02:35:51,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:51,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:35:51,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:51,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:35:51,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:35:51,610 INFO L87 Difference]: Start difference. First operand 25525 states and 36883 transitions. Second operand has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:35:53,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:53,703 INFO L93 Difference]: Finished difference Result 74111 states and 105015 transitions. [2021-11-23 02:35:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-23 02:35:53,703 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) Word has length 147 [2021-11-23 02:35:53,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:53,913 INFO L225 Difference]: With dead ends: 74111 [2021-11-23 02:35:53,913 INFO L226 Difference]: Without dead ends: 50233 [2021-11-23 02:35:53,965 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-11-23 02:35:53,966 INFO L933 BasicCegarLoop]: 3355 mSDtfsCounter, 3445 mSDsluCounter, 3766 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3445 SdHoareTripleChecker+Valid, 6833 SdHoareTripleChecker+Invalid, 584 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:53,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3445 Valid, 6833 Invalid, 584 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:35:54,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50233 states. [2021-11-23 02:35:55,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50233 to 49965. [2021-11-23 02:35:55,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49965 states, 43243 states have (on average 1.431329926230835) internal successors, (61895), 43504 states have internal predecessors, (61895), 4035 states have call successors, (4035), 2558 states have call predecessors, (4035), 2685 states have return successors, (4829), 3903 states have call predecessors, (4829), 4033 states have call successors, (4829) [2021-11-23 02:35:56,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49965 states to 49965 states and 70759 transitions. [2021-11-23 02:35:56,131 INFO L78 Accepts]: Start accepts. Automaton has 49965 states and 70759 transitions. Word has length 147 [2021-11-23 02:35:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:35:56,132 INFO L470 AbstractCegarLoop]: Abstraction has 49965 states and 70759 transitions. [2021-11-23 02:35:56,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 2 states have call successors, (11), 2 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 2 states have call successors, (10) [2021-11-23 02:35:56,132 INFO L276 IsEmpty]: Start isEmpty. Operand 49965 states and 70759 transitions. [2021-11-23 02:35:56,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:35:56,474 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:35:56,475 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:35:56,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:35:56,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-23 02:35:56,693 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:35:56,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:35:56,693 INFO L85 PathProgramCache]: Analyzing trace with hash -331511967, now seen corresponding path program 2 times [2021-11-23 02:35:56,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:35:56,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930758816] [2021-11-23 02:35:56,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:35:56,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:35:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:35:56,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:35:56,783 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:35:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930758816] [2021-11-23 02:35:56,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930758816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:35:56,783 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123040292] [2021-11-23 02:35:56,783 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 02:35:56,784 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:35:56,784 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:35:56,789 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:35:56,814 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:35:56,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-23 02:35:56,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:35:56,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:35:56,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:35:57,145 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 84 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 02:35:57,145 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:35:57,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123040292] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:35:57,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:35:57,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:35:57,146 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591597688] [2021-11-23 02:35:57,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:35:57,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:35:57,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:35:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:35:57,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:57,166 INFO L87 Difference]: Start difference. First operand 49965 states and 70759 transitions. Second operand has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:35:59,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:35:59,482 INFO L93 Difference]: Finished difference Result 98407 states and 141519 transitions. [2021-11-23 02:35:59,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:35:59,482 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-23 02:35:59,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:35:59,768 INFO L225 Difference]: With dead ends: 98407 [2021-11-23 02:35:59,768 INFO L226 Difference]: Without dead ends: 72937 [2021-11-23 02:35:59,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:35:59,873 INFO L933 BasicCegarLoop]: 3243 mSDtfsCounter, 3413 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 278 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3413 SdHoareTripleChecker+Valid, 3383 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:35:59,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3413 Valid, 3383 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 278 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:35:59,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72937 states. [2021-11-23 02:36:02,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72937 to 72417. [2021-11-23 02:36:02,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72417 states, 62439 states have (on average 1.4227486026361729) internal successors, (88835), 62764 states have internal predecessors, (88835), 6015 states have call successors, (6015), 3834 states have call predecessors, (6015), 3961 states have return successors, (7829), 5819 states have call predecessors, (7829), 6013 states have call successors, (7829) [2021-11-23 02:36:03,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72417 states to 72417 states and 102679 transitions. [2021-11-23 02:36:03,287 INFO L78 Accepts]: Start accepts. Automaton has 72417 states and 102679 transitions. Word has length 147 [2021-11-23 02:36:03,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:03,288 INFO L470 AbstractCegarLoop]: Abstraction has 72417 states and 102679 transitions. [2021-11-23 02:36:03,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 37.333333333333336) internal successors, (112), 3 states have internal predecessors, (112), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:36:03,288 INFO L276 IsEmpty]: Start isEmpty. Operand 72417 states and 102679 transitions. [2021-11-23 02:36:03,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-23 02:36:03,414 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:03,414 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:03,436 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:03,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:03,615 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:03,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:03,615 INFO L85 PathProgramCache]: Analyzing trace with hash 877294661, now seen corresponding path program 3 times [2021-11-23 02:36:03,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:03,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990980232] [2021-11-23 02:36:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:03,616 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:03,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:03,702 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 13 proven. 42 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:36:03,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990980232] [2021-11-23 02:36:03,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990980232] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:03,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128884113] [2021-11-23 02:36:03,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 02:36:03,703 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:03,704 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:03,713 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:03,738 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:36:03,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 02:36:03,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 02:36:03,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:36:03,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:04,076 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 88 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 02:36:04,076 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:04,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128884113] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:04,076 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:04,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [6] total 7 [2021-11-23 02:36:04,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931874396] [2021-11-23 02:36:04,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:04,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:04,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:04,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:04,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:04,079 INFO L87 Difference]: Start difference. First operand 72417 states and 102679 transitions. Second operand has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:36:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:06,929 INFO L93 Difference]: Finished difference Result 125327 states and 177820 transitions. [2021-11-23 02:36:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) Word has length 147 [2021-11-23 02:36:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:07,188 INFO L225 Difference]: With dead ends: 125327 [2021-11-23 02:36:07,189 INFO L226 Difference]: Without dead ends: 84363 [2021-11-23 02:36:07,281 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:36:07,282 INFO L933 BasicCegarLoop]: 3232 mSDtfsCounter, 3395 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 262 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3395 SdHoareTripleChecker+Valid, 3278 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 262 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:07,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3395 Valid, 3278 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 262 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-23 02:36:07,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84363 states. [2021-11-23 02:36:10,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84363 to 83875. [2021-11-23 02:36:10,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83875 states, 73085 states have (on average 1.382622973250325) internal successors, (101049), 73474 states have internal predecessors, (101049), 6197 states have call successors, (6197), 4400 states have call predecessors, (6197), 4591 states have return successors, (8755), 6001 states have call predecessors, (8755), 6195 states have call successors, (8755) [2021-11-23 02:36:10,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83875 states to 83875 states and 116001 transitions. [2021-11-23 02:36:10,662 INFO L78 Accepts]: Start accepts. Automaton has 83875 states and 116001 transitions. Word has length 147 [2021-11-23 02:36:10,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:36:10,663 INFO L470 AbstractCegarLoop]: Abstraction has 83875 states and 116001 transitions. [2021-11-23 02:36:10,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.0) internal successors, (117), 3 states have internal predecessors, (117), 3 states have call successors, (11), 3 states have call predecessors, (11), 3 states have return successors, (10), 3 states have call predecessors, (10), 3 states have call successors, (10) [2021-11-23 02:36:10,663 INFO L276 IsEmpty]: Start isEmpty. Operand 83875 states and 116001 transitions. [2021-11-23 02:36:10,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-23 02:36:10,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:36:10,810 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:36:10,832 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:36:11,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:36:11,011 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:36:11,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:36:11,011 INFO L85 PathProgramCache]: Analyzing trace with hash 1498934157, now seen corresponding path program 1 times [2021-11-23 02:36:11,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:36:11,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035790640] [2021-11-23 02:36:11,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:11,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:36:11,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 24 proven. 2 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2021-11-23 02:36:11,078 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:36:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035790640] [2021-11-23 02:36:11,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035790640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:36:11,078 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185776863] [2021-11-23 02:36:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:36:11,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:36:11,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:36:11,080 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:36:11,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_cf8a417f-c316-4940-b741-6fb944882fd2/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:36:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:36:11,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 813 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:36:11,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:36:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 77 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:36:11,453 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:36:11,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185776863] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:36:11,453 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:36:11,453 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-23 02:36:11,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577162181] [2021-11-23 02:36:11,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:36:11,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:36:11,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:36:11,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:36:11,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:11,455 INFO L87 Difference]: Start difference. First operand 83875 states and 116001 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2021-11-23 02:36:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:36:14,834 INFO L93 Difference]: Finished difference Result 149545 states and 208623 transitions. [2021-11-23 02:36:14,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:36:14,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 3 states have call successors, (12), 3 states have call predecessors, (12), 3 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 143 [2021-11-23 02:36:14,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:36:15,095 INFO L225 Difference]: With dead ends: 149545 [2021-11-23 02:36:15,096 INFO L226 Difference]: Without dead ends: 93225 [2021-11-23 02:36:15,190 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:36:15,191 INFO L933 BasicCegarLoop]: 3300 mSDtfsCounter, 92 mSDsluCounter, 3451 mSDsCounter, 0 mSdLazyCounter, 507 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 6513 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:36:15,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 6513 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 507 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:36:15,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93225 states.