./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 0f8a17c6 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb --- Real Ultimate output --- This is Ultimate 0.2.1-dev-0f8a17c [2021-11-19 14:16:38,408 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-19 14:16:38,412 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-19 14:16:38,471 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-19 14:16:38,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-19 14:16:38,473 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-19 14:16:38,475 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-19 14:16:38,478 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-19 14:16:38,480 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-19 14:16:38,481 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-19 14:16:38,483 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-19 14:16:38,484 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-19 14:16:38,485 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-19 14:16:38,486 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-19 14:16:38,488 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-19 14:16:38,490 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-19 14:16:38,491 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-19 14:16:38,493 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-19 14:16:38,495 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-19 14:16:38,498 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-19 14:16:38,501 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-19 14:16:38,502 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-19 14:16:38,504 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-19 14:16:38,505 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-19 14:16:38,511 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-19 14:16:38,512 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-19 14:16:38,512 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-19 14:16:38,514 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-19 14:16:38,515 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-19 14:16:38,517 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-19 14:16:38,517 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-19 14:16:38,518 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-19 14:16:38,521 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-19 14:16:38,522 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-19 14:16:38,524 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-19 14:16:38,525 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-19 14:16:38,526 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-19 14:16:38,526 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-19 14:16:38,526 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-19 14:16:38,528 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-19 14:16:38,528 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-19 14:16:38,529 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-19 14:16:38,578 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-19 14:16:38,578 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-19 14:16:38,580 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-19 14:16:38,580 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-19 14:16:38,580 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-19 14:16:38,581 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-19 14:16:38,581 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-19 14:16:38,581 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-19 14:16:38,588 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-19 14:16:38,588 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-19 14:16:38,589 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-19 14:16:38,589 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-19 14:16:38,590 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-19 14:16:38,590 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-19 14:16:38,590 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-19 14:16:38,590 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-19 14:16:38,591 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-19 14:16:38,592 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-19 14:16:38,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-19 14:16:38,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-19 14:16:38,592 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-19 14:16:38,592 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-19 14:16:38,593 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-19 14:16:38,593 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-19 14:16:38,593 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-19 14:16:38,593 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-19 14:16:38,594 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-19 14:16:38,594 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-19 14:16:38,594 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-19 14:16:38,594 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-19 14:16:38,595 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-19 14:16:38,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:38,595 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-19 14:16:38,596 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-19 14:16:38,596 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-19 14:16:38,596 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-19 14:16:38,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-19 14:16:38,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-19 14:16:38,597 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-19 14:16:38,597 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-19 14:16:38,597 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_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 350eaf2863f602bf9d6d43c31d190808a06f274c6c222054e38d4c11a80535eb [2021-11-19 14:16:38,950 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-19 14:16:38,972 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-19 14:16:38,974 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-19 14:16:38,975 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-19 14:16:38,976 INFO L275 PluginConnector]: CDTParser initialized [2021-11-19 14:16:38,977 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/../../sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2021-11-19 14:16:39,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/data/5ecd911fb/5fd6ae7e4e134c4489c6c12d3d57cefd/FLAGcc61297f7 [2021-11-19 14:16:40,173 INFO L306 CDTParser]: Found 1 translation units. [2021-11-19 14:16:40,174 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c [2021-11-19 14:16:40,244 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/data/5ecd911fb/5fd6ae7e4e134c4489c6c12d3d57cefd/FLAGcc61297f7 [2021-11-19 14:16:40,436 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/data/5ecd911fb/5fd6ae7e4e134c4489c6c12d3d57cefd [2021-11-19 14:16:40,439 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-19 14:16:40,441 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-19 14:16:40,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:40,444 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-19 14:16:40,447 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-19 14:16:40,448 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:40" (1/1) ... [2021-11-19 14:16:40,449 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a30eb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:40, skipping insertion in model container [2021-11-19 14:16:40,449 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 02:16:40" (1/1) ... [2021-11-19 14:16:40,458 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-19 14:16:40,763 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-19 14:16:43,232 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_bf433d20-c038-4084-a11e-6124e6089c11/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2021-11-19 14:16:43,266 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2021-11-19 14:16:43,629 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:43,642 INFO L203 MainTranslator]: Completed pre-run [2021-11-19 14:16:44,947 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_bf433d20-c038-4084-a11e-6124e6089c11/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[380593,380606] [2021-11-19 14:16:44,964 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_bf433d20-c038-4084-a11e-6124e6089c11/sv-benchmarks/c/combinations/Problem05_label49+token_ring.10.cil-1.c[383339,383352] [2021-11-19 14:16:45,007 INFO L207 PostProcessor]: Analyzing one entry point: main [2021-11-19 14:16:45,089 INFO L208 MainTranslator]: Completed translation [2021-11-19 14:16:45,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45 WrapperNode [2021-11-19 14:16:45,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-19 14:16:45,091 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:45,091 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-19 14:16:45,092 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-19 14:16:45,100 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:45,203 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:45,716 INFO L137 Inliner]: procedures = 64, calls = 72, calls flagged for inlining = 41, calls inlined = 41, statements flattened = 13088 [2021-11-19 14:16:45,716 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-19 14:16:45,717 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-19 14:16:45,717 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-19 14:16:45,717 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-19 14:16:45,729 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:45,730 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:45,811 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:45,821 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:46,125 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:46,189 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:46,213 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:46,384 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-19 14:16:46,385 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-19 14:16:46,385 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-19 14:16:46,386 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-19 14:16:46,386 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (1/1) ... [2021-11-19 14:16:46,394 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-19 14:16:46,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:46,421 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-19 14:16:46,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-19 14:16:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-19 14:16:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-19 14:16:46,525 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-19 14:16:46,525 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-19 14:16:46,526 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-19 14:16:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-19 14:16:46,526 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-19 14:16:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure error [2021-11-19 14:16:46,526 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2021-11-19 14:16:46,526 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-19 14:16:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-19 14:16:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-19 14:16:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-19 14:16:46,527 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-19 14:16:46,527 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-19 14:16:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-19 14:16:46,528 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-19 14:16:46,528 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-19 14:16:46,693 INFO L236 CfgBuilder]: Building ICFG [2021-11-19 14:16:46,695 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-19 14:16:54,721 INFO L277 CfgBuilder]: Performing block encoding [2021-11-19 14:16:57,414 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-19 14:16:57,414 INFO L301 CfgBuilder]: Removed 14 assume(true) statements. [2021-11-19 14:16:57,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:57 BoogieIcfgContainer [2021-11-19 14:16:57,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-19 14:16:57,422 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-19 14:16:57,422 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-19 14:16:57,425 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-19 14:16:57,426 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 02:16:40" (1/3) ... [2021-11-19 14:16:57,426 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce1fd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:57, skipping insertion in model container [2021-11-19 14:16:57,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 02:16:45" (2/3) ... [2021-11-19 14:16:57,427 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6ce1fd23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 02:16:57, skipping insertion in model container [2021-11-19 14:16:57,427 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 02:16:57" (3/3) ... [2021-11-19 14:16:57,429 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem05_label49+token_ring.10.cil-1.c [2021-11-19 14:16:57,434 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-19 14:16:57,435 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-19 14:16:57,494 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-19 14:16:57,502 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-19 14:16:57,502 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-19 14:16:57,576 INFO L276 IsEmpty]: Start isEmpty. Operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) [2021-11-19 14:16:57,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-19 14:16:57,592 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:57,593 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:57,593 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:57,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:57,601 INFO L85 PathProgramCache]: Analyzing trace with hash -1889589407, now seen corresponding path program 1 times [2021-11-19 14:16:57,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:57,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866451382] [2021-11-19 14:16:57,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:57,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:57,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-19 14:16:58,030 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:58,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866451382] [2021-11-19 14:16:58,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866451382] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:16:58,032 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:16:58,032 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-19 14:16:58,033 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925276919] [2021-11-19 14:16:58,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:16:58,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-19 14:16:58,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:16:58,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-19 14:16:58,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:58,088 INFO L87 Difference]: Start difference. First operand has 1815 states, 1779 states have (on average 1.9600899381675099) internal successors, (3487), 1784 states have internal predecessors, (3487), 26 states have call successors, (26), 7 states have call predecessors, (26), 7 states have return successors, (26), 25 states have call predecessors, (26), 26 states have call successors, (26) Second operand has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:59,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:16:59,200 INFO L93 Difference]: Finished difference Result 3778 states and 7335 transitions. [2021-11-19 14:16:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-19 14:16:59,203 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 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 62 [2021-11-19 14:16:59,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:16:59,229 INFO L225 Difference]: With dead ends: 3778 [2021-11-19 14:16:59,230 INFO L226 Difference]: Without dead ends: 1962 [2021-11-19 14:16:59,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-19 14:16:59,243 INFO L933 BasicCegarLoop]: 3458 mSDtfsCounter, 3721 mSDsluCounter, 3663 mSDsCounter, 0 mSdLazyCounter, 698 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3721 SdHoareTripleChecker+Valid, 6824 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 698 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:16:59,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3721 Valid, 6824 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 698 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:16:59,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1962 states. [2021-11-19 14:16:59,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1962 to 1961. [2021-11-19 14:16:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1961 states, 1901 states have (on average 1.9263545502367174) internal successors, (3662), 1905 states have internal predecessors, (3662), 46 states have call successors, (46), 13 states have call predecessors, (46), 12 states have return successors, (44), 43 states have call predecessors, (44), 44 states have call successors, (44) [2021-11-19 14:16:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1961 states to 1961 states and 3752 transitions. [2021-11-19 14:16:59,433 INFO L78 Accepts]: Start accepts. Automaton has 1961 states and 3752 transitions. Word has length 62 [2021-11-19 14:16:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:16:59,434 INFO L470 AbstractCegarLoop]: Abstraction has 1961 states and 3752 transitions. [2021-11-19 14:16:59,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.75) internal successors, (51), 4 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-19 14:16:59,435 INFO L276 IsEmpty]: Start isEmpty. Operand 1961 states and 3752 transitions. [2021-11-19 14:16:59,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:16:59,452 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:16:59,452 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:16:59,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-19 14:16:59,453 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:16:59,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:16:59,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1652824925, now seen corresponding path program 1 times [2021-11-19 14:16:59,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:16:59,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564166841] [2021-11-19 14:16:59,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:59,458 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:16:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:59,679 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:16:59,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:16:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564166841] [2021-11-19 14:16:59,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564166841] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:16:59,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936700483] [2021-11-19 14:16:59,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:16:59,681 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:16:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:16:59,683 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:16:59,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-19 14:16:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:16:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 913 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:16:59,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-19 14:17:00,257 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-19 14:17:00,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [936700483] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:00,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:00,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:17:00,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146876840] [2021-11-19 14:17:00,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:00,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:00,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:00,556 INFO L87 Difference]: Start difference. First operand 1961 states and 3752 transitions. Second operand has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:01,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:01,133 INFO L93 Difference]: Finished difference Result 2584 states and 4719 transitions. [2021-11-19 14:17:01,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:01,134 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 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 123 [2021-11-19 14:17:01,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:01,247 INFO L225 Difference]: With dead ends: 2584 [2021-11-19 14:17:01,247 INFO L226 Difference]: Without dead ends: 2269 [2021-11-19 14:17:01,249 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:01,251 INFO L933 BasicCegarLoop]: 3323 mSDtfsCounter, 3479 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3479 SdHoareTripleChecker+Valid, 3525 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:01,252 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3479 Valid, 3525 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:17:01,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2269 states. [2021-11-19 14:17:01,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2269 to 2263. [2021-11-19 14:17:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2263 states, 2153 states have (on average 1.8769159312587087) internal successors, (4041), 2158 states have internal predecessors, (4041), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (82), 80 states have call predecessors, (82), 82 states have call successors, (82) [2021-11-19 14:17:01,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2263 states to 2263 states and 4207 transitions. [2021-11-19 14:17:01,356 INFO L78 Accepts]: Start accepts. Automaton has 2263 states and 4207 transitions. Word has length 123 [2021-11-19 14:17:01,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:01,357 INFO L470 AbstractCegarLoop]: Abstraction has 2263 states and 4207 transitions. [2021-11-19 14:17:01,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.666666666666668) internal successors, (95), 2 states have internal predecessors, (95), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:01,357 INFO L276 IsEmpty]: Start isEmpty. Operand 2263 states and 4207 transitions. [2021-11-19 14:17:01,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:01,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:01,380 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:01,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:01,595 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:01,595 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:01,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash -203694525, now seen corresponding path program 1 times [2021-11-19 14:17:01,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:01,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245018844] [2021-11-19 14:17:01,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:01,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:01,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:17:01,774 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:01,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245018844] [2021-11-19 14:17:01,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245018844] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:01,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924942821] [2021-11-19 14:17:01,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:01,776 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:01,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:01,780 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:01,794 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-19 14:17:02,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:02,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 907 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:02,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-19 14:17:02,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-19 14:17:02,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924942821] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:02,561 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:02,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:17:02,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31339817] [2021-11-19 14:17:02,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:02,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:02,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:02,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:02,565 INFO L87 Difference]: Start difference. First operand 2263 states and 4207 transitions. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:03,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:03,131 INFO L93 Difference]: Finished difference Result 3484 states and 6098 transitions. [2021-11-19 14:17:03,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:03,132 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 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 123 [2021-11-19 14:17:03,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:03,154 INFO L225 Difference]: With dead ends: 3484 [2021-11-19 14:17:03,155 INFO L226 Difference]: Without dead ends: 2867 [2021-11-19 14:17:03,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:03,161 INFO L933 BasicCegarLoop]: 3322 mSDtfsCounter, 3497 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3497 SdHoareTripleChecker+Valid, 3524 SdHoareTripleChecker+Invalid, 309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:03,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3497 Valid, 3524 Invalid, 309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:17:03,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2867 states. [2021-11-19 14:17:03,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2867 to 2859. [2021-11-19 14:17:03,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2651 states have (on average 1.8057336854017352) internal successors, (4787), 2658 states have internal predecessors, (4787), 158 states have call successors, (158), 49 states have call predecessors, (158), 48 states have return successors, (156), 152 states have call predecessors, (156), 156 states have call successors, (156) [2021-11-19 14:17:03,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 5101 transitions. [2021-11-19 14:17:03,303 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 5101 transitions. Word has length 123 [2021-11-19 14:17:03,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:03,303 INFO L470 AbstractCegarLoop]: Abstraction has 2859 states and 5101 transitions. [2021-11-19 14:17:03,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 2 states have internal predecessors, (77), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:03,304 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 5101 transitions. [2021-11-19 14:17:03,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:03,310 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:03,311 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:03,350 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:03,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:03,530 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:03,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:03,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1410117603, now seen corresponding path program 1 times [2021-11-19 14:17:03,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:03,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255477878] [2021-11-19 14:17:03,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:03,532 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:03,632 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:17:03,632 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:03,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255477878] [2021-11-19 14:17:03,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255477878] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:03,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757189957] [2021-11-19 14:17:03,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:03,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:03,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:03,640 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:03,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-19 14:17:03,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:03,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:03,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:04,117 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-19 14:17:04,118 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:04,399 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-19 14:17:04,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757189957] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:04,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:04,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:17:04,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579542028] [2021-11-19 14:17:04,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:04,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:04,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:04,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:04,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:04,402 INFO L87 Difference]: Start difference. First operand 2859 states and 5101 transitions. Second operand has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:04,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:04,981 INFO L93 Difference]: Finished difference Result 5260 states and 8806 transitions. [2021-11-19 14:17:04,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:04,982 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 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 123 [2021-11-19 14:17:04,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:05,011 INFO L225 Difference]: With dead ends: 5260 [2021-11-19 14:17:05,011 INFO L226 Difference]: Without dead ends: 4047 [2021-11-19 14:17:05,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:05,020 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3491 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3491 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:05,020 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3491 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:17:05,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-11-19 14:17:05,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 4035. [2021-11-19 14:17:05,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4035 states, 3635 states have (on average 1.7207702888583218) internal successors, (6255), 3646 states have internal predecessors, (6255), 302 states have call successors, (302), 97 states have call predecessors, (302), 96 states have return successors, (300), 292 states have call predecessors, (300), 300 states have call successors, (300) [2021-11-19 14:17:05,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4035 states to 4035 states and 6857 transitions. [2021-11-19 14:17:05,233 INFO L78 Accepts]: Start accepts. Automaton has 4035 states and 6857 transitions. Word has length 123 [2021-11-19 14:17:05,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:05,234 INFO L470 AbstractCegarLoop]: Abstraction has 4035 states and 6857 transitions. [2021-11-19 14:17:05,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.666666666666668) internal successors, (83), 2 states have internal predecessors, (83), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:05,235 INFO L276 IsEmpty]: Start isEmpty. Operand 4035 states and 6857 transitions. [2021-11-19 14:17:05,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:05,244 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:05,244 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:05,282 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:05,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:05,459 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:05,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:05,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1759299197, now seen corresponding path program 1 times [2021-11-19 14:17:05,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:05,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157500947] [2021-11-19 14:17:05,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:05,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:05,549 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:17:05,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:05,549 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157500947] [2021-11-19 14:17:05,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157500947] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:05,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055341155] [2021-11-19 14:17:05,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:05,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:05,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:05,551 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:05,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-19 14:17:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:05,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 895 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:05,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:06,014 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-19 14:17:06,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:06,353 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-19 14:17:06,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055341155] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:06,354 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:06,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:17:06,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626548414] [2021-11-19 14:17:06,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:06,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:06,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:06,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:06,357 INFO L87 Difference]: Start difference. First operand 4035 states and 6857 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:07,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:07,111 INFO L93 Difference]: Finished difference Result 8764 states and 14122 transitions. [2021-11-19 14:17:07,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:07,112 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 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 123 [2021-11-19 14:17:07,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:07,155 INFO L225 Difference]: With dead ends: 8764 [2021-11-19 14:17:07,155 INFO L226 Difference]: Without dead ends: 6375 [2021-11-19 14:17:07,166 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:07,167 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3500 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3500 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:07,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3500 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:17:07,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6375 states. [2021-11-19 14:17:07,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6375 to 6355. [2021-11-19 14:17:07,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6355 states, 5579 states have (on average 1.6388241620362072) internal successors, (9143), 5598 states have internal predecessors, (9143), 582 states have call successors, (582), 193 states have call predecessors, (582), 192 states have return successors, (580), 564 states have call predecessors, (580), 580 states have call successors, (580) [2021-11-19 14:17:07,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6355 states to 6355 states and 10305 transitions. [2021-11-19 14:17:07,475 INFO L78 Accepts]: Start accepts. Automaton has 6355 states and 10305 transitions. Word has length 123 [2021-11-19 14:17:07,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:07,475 INFO L470 AbstractCegarLoop]: Abstraction has 6355 states and 10305 transitions. [2021-11-19 14:17:07,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 2 states have internal predecessors, (74), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 6355 states and 10305 transitions. [2021-11-19 14:17:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:07,490 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:07,491 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:07,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:07,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:07,707 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:07,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:07,707 INFO L85 PathProgramCache]: Analyzing trace with hash 1748861923, now seen corresponding path program 1 times [2021-11-19 14:17:07,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:07,707 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143243831] [2021-11-19 14:17:07,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:07,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:07,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:07,808 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-19 14:17:07,808 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:07,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143243831] [2021-11-19 14:17:07,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143243831] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:07,809 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742544507] [2021-11-19 14:17:07,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:07,809 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-19 14:17:07,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 [2021-11-19 14:17:07,811 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-19 14:17:07,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-19 14:17:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:08,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 889 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-19 14:17:08,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-19 14:17:08,251 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-19 14:17:08,251 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-19 14:17:08,529 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-19 14:17:08,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742544507] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-19 14:17:08,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-19 14:17:08,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 4] total 7 [2021-11-19 14:17:08,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226142254] [2021-11-19 14:17:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:08,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-19 14:17:08,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-19 14:17:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:08,532 INFO L87 Difference]: Start difference. First operand 6355 states and 10305 transitions. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:09,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:09,285 INFO L93 Difference]: Finished difference Result 15676 states and 24554 transitions. [2021-11-19 14:17:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-19 14:17:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 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 123 [2021-11-19 14:17:09,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:09,381 INFO L225 Difference]: With dead ends: 15676 [2021-11-19 14:17:09,381 INFO L226 Difference]: Without dead ends: 10967 [2021-11-19 14:17:09,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 243 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-19 14:17:09,409 INFO L933 BasicCegarLoop]: 3285 mSDtfsCounter, 3485 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3485 SdHoareTripleChecker+Valid, 3487 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:09,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3485 Valid, 3487 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-19 14:17:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10967 states. [2021-11-19 14:17:09,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10967 to 10931. [2021-11-19 14:17:09,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10931 states, 9419 states have (on average 1.5737339420320628) internal successors, (14823), 9454 states have internal predecessors, (14823), 1126 states have call successors, (1126), 385 states have call predecessors, (1126), 384 states have return successors, (1124), 1092 states have call predecessors, (1124), 1124 states have call successors, (1124) [2021-11-19 14:17:10,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10931 states to 10931 states and 17073 transitions. [2021-11-19 14:17:10,097 INFO L78 Accepts]: Start accepts. Automaton has 10931 states and 17073 transitions. Word has length 123 [2021-11-19 14:17:10,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:10,099 INFO L470 AbstractCegarLoop]: Abstraction has 10931 states and 17073 transitions. [2021-11-19 14:17:10,099 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 2 states have internal predecessors, (89), 2 states have call successors, (8), 2 states have call predecessors, (8), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-19 14:17:10,099 INFO L276 IsEmpty]: Start isEmpty. Operand 10931 states and 17073 transitions. [2021-11-19 14:17:10,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-19 14:17:10,125 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:10,125 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:10,165 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-19 14:17:10,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bf433d20-c038-4084-a11e-6124e6089c11/bin/utaipan-UbGMyvGFUs/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-19 14:17:10,351 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:10,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:10,352 INFO L85 PathProgramCache]: Analyzing trace with hash 988005763, now seen corresponding path program 1 times [2021-11-19 14:17:10,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:10,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605744540] [2021-11-19 14:17:10,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:10,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:10,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:10,505 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:17:10,505 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:10,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605744540] [2021-11-19 14:17:10,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605744540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:10,506 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:10,506 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:17:10,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789623259] [2021-11-19 14:17:10,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:10,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:10,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:10,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:10,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:10,508 INFO L87 Difference]: Start difference. First operand 10931 states and 17073 transitions. Second operand has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:12,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:12,078 INFO L93 Difference]: Finished difference Result 25179 states and 38535 transitions. [2021-11-19 14:17:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:12,079 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 123 [2021-11-19 14:17:12,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:12,161 INFO L225 Difference]: With dead ends: 25179 [2021-11-19 14:17:12,161 INFO L226 Difference]: Without dead ends: 15895 [2021-11-19 14:17:12,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:12,199 INFO L933 BasicCegarLoop]: 3291 mSDtfsCounter, 3959 mSDsluCounter, 10415 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3965 SdHoareTripleChecker+Valid, 12965 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [3965 Valid, 12965 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:17:12,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15895 states. [2021-11-19 14:17:13,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15895 to 15443. [2021-11-19 14:17:13,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15443 states, 13195 states have (on average 1.544145509662751) internal successors, (20375), 13246 states have internal predecessors, (20375), 1670 states have call successors, (1670), 577 states have call predecessors, (1670), 576 states have return successors, (1668), 1620 states have call predecessors, (1668), 1668 states have call successors, (1668) [2021-11-19 14:17:13,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15443 states to 15443 states and 23713 transitions. [2021-11-19 14:17:13,156 INFO L78 Accepts]: Start accepts. Automaton has 15443 states and 23713 transitions. Word has length 123 [2021-11-19 14:17:13,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:13,157 INFO L470 AbstractCegarLoop]: Abstraction has 15443 states and 23713 transitions. [2021-11-19 14:17:13,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.833333333333334) internal successors, (71), 6 states have internal predecessors, (71), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:13,161 INFO L276 IsEmpty]: Start isEmpty. Operand 15443 states and 23713 transitions. [2021-11-19 14:17:13,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-19 14:17:13,190 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:13,191 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:13,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-19 14:17:13,191 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:13,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:13,192 INFO L85 PathProgramCache]: Analyzing trace with hash 308549960, now seen corresponding path program 1 times [2021-11-19 14:17:13,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:13,192 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306849168] [2021-11-19 14:17:13,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:13,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:13,362 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:17:13,362 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:13,362 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306849168] [2021-11-19 14:17:13,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306849168] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:13,362 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:13,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:17:13,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34109581] [2021-11-19 14:17:13,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:13,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:13,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:13,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:13,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:13,365 INFO L87 Difference]: Start difference. First operand 15443 states and 23713 transitions. Second operand has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:15,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:15,688 INFO L93 Difference]: Finished difference Result 49499 states and 74312 transitions. [2021-11-19 14:17:15,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:15,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 124 [2021-11-19 14:17:15,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:15,898 INFO L225 Difference]: With dead ends: 49499 [2021-11-19 14:17:15,898 INFO L226 Difference]: Without dead ends: 35703 [2021-11-19 14:17:15,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:15,969 INFO L933 BasicCegarLoop]: 3297 mSDtfsCounter, 4177 mSDsluCounter, 10445 mSDsCounter, 0 mSdLazyCounter, 1205 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4196 SdHoareTripleChecker+Valid, 12993 SdHoareTripleChecker+Invalid, 1343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 1205 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:15,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4196 Valid, 12993 Invalid, 1343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 1205 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-19 14:17:16,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35703 states. [2021-11-19 14:17:17,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35703 to 28659. [2021-11-19 14:17:17,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28659 states, 24267 states have (on average 1.5088391642971937) internal successors, (36615), 24366 states have internal predecessors, (36615), 3238 states have call successors, (3238), 1153 states have call predecessors, (3238), 1152 states have return successors, (3236), 3140 states have call predecessors, (3236), 3236 states have call successors, (3236) [2021-11-19 14:17:17,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28659 states to 28659 states and 43089 transitions. [2021-11-19 14:17:17,755 INFO L78 Accepts]: Start accepts. Automaton has 28659 states and 43089 transitions. Word has length 124 [2021-11-19 14:17:17,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:17,756 INFO L470 AbstractCegarLoop]: Abstraction has 28659 states and 43089 transitions. [2021-11-19 14:17:17,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.0) internal successors, (72), 6 states have internal predecessors, (72), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 28659 states and 43089 transitions. [2021-11-19 14:17:17,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-19 14:17:17,818 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:17,819 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:17,819 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-19 14:17:17,819 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:17,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1408138275, now seen corresponding path program 1 times [2021-11-19 14:17:17,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:17,820 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223530845] [2021-11-19 14:17:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:17,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:17,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:17,956 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:17:17,956 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:17,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223530845] [2021-11-19 14:17:17,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223530845] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:17,956 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:17,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:17:17,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612257181] [2021-11-19 14:17:17,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:17,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:17,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:17,959 INFO L87 Difference]: Start difference. First operand 28659 states and 43089 transitions. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:20,561 INFO L93 Difference]: Finished difference Result 74491 states and 111191 transitions. [2021-11-19 14:17:20,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:20,562 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 125 [2021-11-19 14:17:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:20,978 INFO L225 Difference]: With dead ends: 74491 [2021-11-19 14:17:20,979 INFO L226 Difference]: Without dead ends: 47479 [2021-11-19 14:17:21,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:21,047 INFO L933 BasicCegarLoop]: 3280 mSDtfsCounter, 4104 mSDsluCounter, 7056 mSDsCounter, 0 mSdLazyCounter, 908 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4110 SdHoareTripleChecker+Valid, 9828 SdHoareTripleChecker+Invalid, 1058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:21,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4110 Valid, 9828 Invalid, 1058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 908 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-19 14:17:21,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47479 states. [2021-11-19 14:17:23,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47479 to 41779. [2021-11-19 14:17:23,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41779 states, 35243 states have (on average 1.492920579973328) internal successors, (52615), 35390 states have internal predecessors, (52615), 4806 states have call successors, (4806), 1729 states have call predecessors, (4806), 1728 states have return successors, (4804), 4660 states have call predecessors, (4804), 4804 states have call successors, (4804) [2021-11-19 14:17:23,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41779 states to 41779 states and 62225 transitions. [2021-11-19 14:17:23,321 INFO L78 Accepts]: Start accepts. Automaton has 41779 states and 62225 transitions. Word has length 125 [2021-11-19 14:17:23,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:23,322 INFO L470 AbstractCegarLoop]: Abstraction has 41779 states and 62225 transitions. [2021-11-19 14:17:23,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:23,322 INFO L276 IsEmpty]: Start isEmpty. Operand 41779 states and 62225 transitions. [2021-11-19 14:17:23,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-19 14:17:23,391 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:23,392 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:23,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-19 14:17:23,392 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:23,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:23,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1000917720, now seen corresponding path program 1 times [2021-11-19 14:17:23,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:23,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805046588] [2021-11-19 14:17:23,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:23,393 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:23,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:17:23,509 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:23,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805046588] [2021-11-19 14:17:23,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805046588] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:23,510 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:23,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:17:23,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837452497] [2021-11-19 14:17:23,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:23,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:23,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:23,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:23,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:23,512 INFO L87 Difference]: Start difference. First operand 41779 states and 62225 transitions. Second operand has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:28,048 INFO L93 Difference]: Finished difference Result 135099 states and 200472 transitions. [2021-11-19 14:17:28,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:28,059 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 126 [2021-11-19 14:17:28,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:28,458 INFO L225 Difference]: With dead ends: 135099 [2021-11-19 14:17:28,459 INFO L226 Difference]: Without dead ends: 94967 [2021-11-19 14:17:28,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:28,562 INFO L933 BasicCegarLoop]: 3272 mSDtfsCounter, 4146 mSDsluCounter, 6987 mSDsCounter, 0 mSdLazyCounter, 896 mSolverCounterSat, 154 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4165 SdHoareTripleChecker+Valid, 9759 SdHoareTripleChecker+Invalid, 1050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 154 IncrementalHoareTripleChecker+Valid, 896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:28,563 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4165 Valid, 9759 Invalid, 1050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [154 Valid, 896 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2021-11-19 14:17:28,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94967 states. [2021-11-19 14:17:32,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94967 to 80179. [2021-11-19 14:17:32,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80179 states, 67403 states have (on average 1.4742222156283844) internal successors, (99367), 67694 states have internal predecessors, (99367), 9318 states have call successors, (9318), 3457 states have call predecessors, (9318), 3456 states have return successors, (9316), 9028 states have call predecessors, (9316), 9316 states have call successors, (9316) [2021-11-19 14:17:33,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80179 states to 80179 states and 118001 transitions. [2021-11-19 14:17:33,598 INFO L78 Accepts]: Start accepts. Automaton has 80179 states and 118001 transitions. Word has length 126 [2021-11-19 14:17:33,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-19 14:17:33,599 INFO L470 AbstractCegarLoop]: Abstraction has 80179 states and 118001 transitions. [2021-11-19 14:17:33,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.333333333333334) internal successors, (74), 6 states have internal predecessors, (74), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 80179 states and 118001 transitions. [2021-11-19 14:17:33,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-11-19 14:17:33,716 INFO L506 BasicCegarLoop]: Found error trace [2021-11-19 14:17:33,717 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-19 14:17:33,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-19 14:17:33,717 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting errorErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, errorErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-19 14:17:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-19 14:17:33,718 INFO L85 PathProgramCache]: Analyzing trace with hash -331377089, now seen corresponding path program 1 times [2021-11-19 14:17:33,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-19 14:17:33,718 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172680929] [2021-11-19 14:17:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-19 14:17:33,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-19 14:17:33,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-19 14:17:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-19 14:17:33,853 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-19 14:17:33,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172680929] [2021-11-19 14:17:33,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172680929] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-19 14:17:33,854 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-19 14:17:33,854 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-19 14:17:33,854 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681852663] [2021-11-19 14:17:33,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-19 14:17:33,855 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-19 14:17:33,855 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-19 14:17:33,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-19 14:17:33,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-19 14:17:33,856 INFO L87 Difference]: Start difference. First operand 80179 states and 118001 transitions. Second operand has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-19 14:17:40,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-19 14:17:40,340 INFO L93 Difference]: Finished difference Result 209595 states and 308999 transitions. [2021-11-19 14:17:40,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-19 14:17:40,340 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 12.5) internal successors, (75), 6 states have internal predecessors, (75), 4 states have call successors, (9), 3 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 4 states have call successors, (8) Word has length 127 [2021-11-19 14:17:40,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-19 14:17:41,262 INFO L225 Difference]: With dead ends: 209595 [2021-11-19 14:17:41,262 INFO L226 Difference]: Without dead ends: 131063 [2021-11-19 14:17:41,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-19 14:17:41,423 INFO L933 BasicCegarLoop]: 3280 mSDtfsCounter, 4058 mSDsluCounter, 7032 mSDsCounter, 0 mSdLazyCounter, 904 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4064 SdHoareTripleChecker+Valid, 9808 SdHoareTripleChecker+Invalid, 1054 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 904 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-19 14:17:41,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4064 Valid, 9808 Invalid, 1054 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 904 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-19 14:17:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131063 states.