./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:09:59,116 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:09:59,119 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:09:59,176 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:09:59,177 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:09:59,178 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:09:59,180 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:09:59,182 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:09:59,185 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:09:59,186 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:09:59,187 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:09:59,189 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:09:59,189 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:09:59,190 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:09:59,192 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:09:59,194 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:09:59,195 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:09:59,197 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:09:59,200 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:09:59,202 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:09:59,205 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:09:59,207 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:09:59,208 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:09:59,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:09:59,214 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:09:59,214 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:09:59,215 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:09:59,216 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:09:59,217 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:09:59,218 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:09:59,218 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:09:59,220 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:09:59,221 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:09:59,222 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:09:59,223 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:09:59,223 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:09:59,224 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:09:59,225 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:09:59,225 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:09:59,226 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:09:59,227 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:09:59,230 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:09:59,273 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:09:59,273 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:09:59,273 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:09:59,274 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:09:59,274 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:09:59,275 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:09:59,275 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:09:59,275 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:09:59,275 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:09:59,275 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:09:59,276 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:09:59,276 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:09:59,276 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:09:59,276 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:09:59,277 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:09:59,277 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:09:59,277 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:09:59,277 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:09:59,278 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:09:59,278 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:09:59,279 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:09:59,279 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:09:59,279 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:09:59,279 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:09:59,280 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:09:59,280 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:09:59,280 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:09:59,280 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:09:59,280 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:09:59,281 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:09:59,281 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:09:59,281 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:09:59,281 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:09:59,282 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:09:59,282 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:09:59,282 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:09:59,282 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:09:59,283 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:09:59,283 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:09:59,283 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:09:59,283 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:09:59,284 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_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2cb37d56f61ec273f723a733aad4526e011a3841f34b26767a03fdc541dd1ee3 [2021-11-23 02:09:59,582 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:09:59,624 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:09:59,627 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:09:59,628 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:09:59,629 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:09:59,631 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-11-23 02:09:59,702 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/data/ab09349df/4ce02870205e4e4d8217541191017ca9/FLAG66fb14b75 [2021-11-23 02:10:00,235 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:10:00,235 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-11-23 02:10:00,269 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/data/ab09349df/4ce02870205e4e4d8217541191017ca9/FLAG66fb14b75 [2021-11-23 02:10:00,576 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/data/ab09349df/4ce02870205e4e4d8217541191017ca9 [2021-11-23 02:10:00,582 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:10:00,585 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:10:00,588 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:00,591 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:10:00,596 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:10:00,597 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:00" (1/1) ... [2021-11-23 02:10:00,601 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c683a65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:00, skipping insertion in model container [2021-11-23 02:10:00,602 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:10:00" (1/1) ... [2021-11-23 02:10:00,611 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:10:00,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:10:00,884 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_8264f237-dab5-4f83-8a3f-59a8fe5cd009/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2021-11-23 02:10:00,956 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_8264f237-dab5-4f83-8a3f-59a8fe5cd009/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2021-11-23 02:10:01,132 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:01,145 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:10:01,161 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_8264f237-dab5-4f83-8a3f-59a8fe5cd009/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[914,927] [2021-11-23 02:10:01,198 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_8264f237-dab5-4f83-8a3f-59a8fe5cd009/sv-benchmarks/c/combinations/pc_sfifo_2.cil-1+token_ring.09.cil-1.c[7115,7128] [2021-11-23 02:10:01,292 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:10:01,334 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:10:01,335 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01 WrapperNode [2021-11-23 02:10:01,335 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:10:01,337 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:01,337 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:10:01,337 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:10:01,347 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,379 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,479 INFO L137 Inliner]: procedures = 71, calls = 84, calls flagged for inlining = 40, calls inlined = 40, statements flattened = 866 [2021-11-23 02:10:01,488 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:10:01,489 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:10:01,489 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:10:01,490 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:10:01,500 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,502 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,513 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,556 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,591 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,594 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:10:01,602 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:10:01,602 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:10:01,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:10:01,604 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (1/1) ... [2021-11-23 02:10:01,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:10:01,641 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:01,659 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:10:01,677 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:10:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:10:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-23 02:10:01,718 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-23 02:10:01,718 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2021-11-23 02:10:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2021-11-23 02:10:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread1 [2021-11-23 02:10:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread1 [2021-11-23 02:10:01,719 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread2 [2021-11-23 02:10:01,719 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread2 [2021-11-23 02:10:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events1 [2021-11-23 02:10:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events1 [2021-11-23 02:10:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events2 [2021-11-23 02:10:01,720 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events2 [2021-11-23 02:10:01,720 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads2 [2021-11-23 02:10:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads2 [2021-11-23 02:10:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads1 [2021-11-23 02:10:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads1 [2021-11-23 02:10:01,721 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2021-11-23 02:10:01,721 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2021-11-23 02:10:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels1 [2021-11-23 02:10:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels1 [2021-11-23 02:10:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels2 [2021-11-23 02:10:01,722 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels2 [2021-11-23 02:10:01,722 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:10:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events2 [2021-11-23 02:10:01,723 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events2 [2021-11-23 02:10:01,723 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events1 [2021-11-23 02:10:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events1 [2021-11-23 02:10:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:10:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:10:01,724 INFO L130 BoogieDeclarations]: Found specification of procedure error1 [2021-11-23 02:10:01,724 INFO L138 BoogieDeclarations]: Found implementation of procedure error1 [2021-11-23 02:10:01,908 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:10:01,911 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:10:02,896 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:10:03,343 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:10:03,344 INFO L301 CfgBuilder]: Removed 16 assume(true) statements. [2021-11-23 02:10:03,348 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:03 BoogieIcfgContainer [2021-11-23 02:10:03,348 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:10:03,350 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:10:03,350 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:10:03,354 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:10:03,355 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:10:00" (1/3) ... [2021-11-23 02:10:03,356 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb1949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:03, skipping insertion in model container [2021-11-23 02:10:03,357 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:10:01" (2/3) ... [2021-11-23 02:10:03,358 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4eb1949f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:10:03, skipping insertion in model container [2021-11-23 02:10:03,358 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:10:03" (3/3) ... [2021-11-23 02:10:03,360 INFO L111 eAbstractionObserver]: Analyzing ICFG pc_sfifo_2.cil-1+token_ring.09.cil-1.c [2021-11-23 02:10:03,370 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:10:03,370 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2021-11-23 02:10:03,459 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:10:03,469 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 02:10:03,469 INFO L340 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2021-11-23 02:10:03,516 INFO L276 IsEmpty]: Start isEmpty. Operand has 227 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 179 states have internal predecessors, (265), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) [2021-11-23 02:10:03,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-23 02:10:03,525 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:03,526 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] [2021-11-23 02:10:03,527 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:03,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:03,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1910028162, now seen corresponding path program 1 times [2021-11-23 02:10:03,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:03,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142323484] [2021-11-23 02:10:03,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:03,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:03,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:03,912 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:03,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142323484] [2021-11-23 02:10:03,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142323484] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:03,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:03,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:10:03,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745594152] [2021-11-23 02:10:03,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:03,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:10:03,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:03,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:10:03,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:10:03,963 INFO L87 Difference]: Start difference. First operand has 227 states, 173 states have (on average 1.5317919075144508) internal successors, (265), 179 states have internal predecessors, (265), 37 states have call successors, (37), 14 states have call predecessors, (37), 14 states have return successors, (37), 36 states have call predecessors, (37), 37 states have call successors, (37) Second operand has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:10:05,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:05,112 INFO L93 Difference]: Finished difference Result 511 states and 746 transitions. [2021-11-23 02:10:05,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:10:05,115 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 45 [2021-11-23 02:10:05,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:05,161 INFO L225 Difference]: With dead ends: 511 [2021-11-23 02:10:05,161 INFO L226 Difference]: Without dead ends: 287 [2021-11-23 02:10:05,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:10:05,183 INFO L933 BasicCegarLoop]: 252 mSDtfsCounter, 492 mSDsluCounter, 812 mSDsCounter, 0 mSdLazyCounter, 791 mSolverCounterSat, 120 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 521 SdHoareTripleChecker+Valid, 920 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 120 IncrementalHoareTripleChecker+Valid, 791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:05,185 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [521 Valid, 920 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [120 Valid, 791 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2021-11-23 02:10:05,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2021-11-23 02:10:05,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 274. [2021-11-23 02:10:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 207 states have (on average 1.4492753623188406) internal successors, (300), 211 states have internal predecessors, (300), 45 states have call successors, (45), 21 states have call predecessors, (45), 20 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2021-11-23 02:10:05,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 388 transitions. [2021-11-23 02:10:05,336 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 388 transitions. Word has length 45 [2021-11-23 02:10:05,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:05,337 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 388 transitions. [2021-11-23 02:10:05,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 4.285714285714286) internal successors, (30), 7 states have internal predecessors, (30), 4 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-23 02:10:05,338 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 388 transitions. [2021-11-23 02:10:05,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-23 02:10:05,343 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:05,343 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] [2021-11-23 02:10:05,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:10:05,344 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:05,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:05,346 INFO L85 PathProgramCache]: Analyzing trace with hash 739623069, now seen corresponding path program 1 times [2021-11-23 02:10:05,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:05,347 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677579337] [2021-11-23 02:10:05,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:05,348 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:05,458 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:05,459 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:05,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677579337] [2021-11-23 02:10:05,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677579337] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:05,460 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:05,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:05,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440727738] [2021-11-23 02:10:05,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:05,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:05,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:05,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:05,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:05,464 INFO L87 Difference]: Start difference. First operand 274 states and 388 transitions. Second operand has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:05,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:05,634 INFO L93 Difference]: Finished difference Result 499 states and 675 transitions. [2021-11-23 02:10:05,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:05,635 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 46 [2021-11-23 02:10:05,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:05,647 INFO L225 Difference]: With dead ends: 499 [2021-11-23 02:10:05,647 INFO L226 Difference]: Without dead ends: 383 [2021-11-23 02:10:05,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:05,651 INFO L933 BasicCegarLoop]: 277 mSDtfsCounter, 299 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 340 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:05,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 340 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:05,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2021-11-23 02:10:05,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 369. [2021-11-23 02:10:05,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 272 states have (on average 1.3970588235294117) internal successors, (380), 276 states have internal predecessors, (380), 61 states have call successors, (61), 35 states have call predecessors, (61), 34 states have return successors, (59), 59 states have call predecessors, (59), 59 states have call successors, (59) [2021-11-23 02:10:05,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 500 transitions. [2021-11-23 02:10:05,705 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 500 transitions. Word has length 46 [2021-11-23 02:10:05,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:05,706 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 500 transitions. [2021-11-23 02:10:05,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.333333333333334) internal successors, (31), 3 states have internal predecessors, (31), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:05,706 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 500 transitions. [2021-11-23 02:10:05,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:10:05,709 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:05,710 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] [2021-11-23 02:10:05,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:10:05,710 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:05,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:05,711 INFO L85 PathProgramCache]: Analyzing trace with hash -1723340753, now seen corresponding path program 1 times [2021-11-23 02:10:05,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:05,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059325662] [2021-11-23 02:10:05,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:05,713 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:05,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:05,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:05,823 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:05,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059325662] [2021-11-23 02:10:05,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059325662] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:05,825 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:05,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:05,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657029267] [2021-11-23 02:10:05,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:05,827 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:05,827 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:05,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:05,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:05,830 INFO L87 Difference]: Start difference. First operand 369 states and 500 transitions. Second operand has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:05,993 INFO L93 Difference]: Finished difference Result 733 states and 948 transitions. [2021-11-23 02:10:05,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:05,994 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 47 [2021-11-23 02:10:05,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:05,998 INFO L225 Difference]: With dead ends: 733 [2021-11-23 02:10:05,999 INFO L226 Difference]: Without dead ends: 523 [2021-11-23 02:10:06,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:06,012 INFO L933 BasicCegarLoop]: 279 mSDtfsCounter, 68 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:06,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 528 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:06,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2021-11-23 02:10:06,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2021-11-23 02:10:06,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 377 states have (on average 1.3660477453580901) internal successors, (515), 381 states have internal predecessors, (515), 85 states have call successors, (85), 56 states have call predecessors, (85), 55 states have return successors, (83), 83 states have call predecessors, (83), 83 states have call successors, (83) [2021-11-23 02:10:06,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 683 transitions. [2021-11-23 02:10:06,105 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 683 transitions. Word has length 47 [2021-11-23 02:10:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:06,109 INFO L470 AbstractCegarLoop]: Abstraction has 519 states and 683 transitions. [2021-11-23 02:10:06,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.666666666666666) internal successors, (32), 3 states have internal predecessors, (32), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:06,109 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 683 transitions. [2021-11-23 02:10:06,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-23 02:10:06,122 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:06,122 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] [2021-11-23 02:10:06,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-23 02:10:06,123 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:06,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:06,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2100194830, now seen corresponding path program 1 times [2021-11-23 02:10:06,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:06,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495696953] [2021-11-23 02:10:06,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:06,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:06,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:06,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,223 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:06,223 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495696953] [2021-11-23 02:10:06,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495696953] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:06,223 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:06,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:10:06,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006334726] [2021-11-23 02:10:06,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:06,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:10:06,225 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:06,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:10:06,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:06,226 INFO L87 Difference]: Start difference. First operand 519 states and 683 transitions. Second operand has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:06,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:06,366 INFO L93 Difference]: Finished difference Result 943 states and 1205 transitions. [2021-11-23 02:10:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:10:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 53 [2021-11-23 02:10:06,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:06,375 INFO L225 Difference]: With dead ends: 943 [2021-11-23 02:10:06,376 INFO L226 Difference]: Without dead ends: 582 [2021-11-23 02:10:06,382 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:10:06,394 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 299 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:06,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 347 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:10:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 582 states. [2021-11-23 02:10:06,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 582 to 570. [2021-11-23 02:10:06,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 413 states have (on average 1.3486682808716708) internal successors, (557), 417 states have internal predecessors, (557), 93 states have call successors, (93), 63 states have call predecessors, (93), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-23 02:10:06,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 741 transitions. [2021-11-23 02:10:06,463 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 741 transitions. Word has length 53 [2021-11-23 02:10:06,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:06,464 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 741 transitions. [2021-11-23 02:10:06,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.666666666666666) internal successors, (38), 3 states have internal predecessors, (38), 3 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:10:06,464 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 741 transitions. [2021-11-23 02:10:06,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-23 02:10:06,468 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:06,468 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:06,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-23 02:10:06,469 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:06,473 INFO L85 PathProgramCache]: Analyzing trace with hash 164820616, now seen corresponding path program 1 times [2021-11-23 02:10:06,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:06,473 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597576367] [2021-11-23 02:10:06,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:06,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:06,595 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:06,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597576367] [2021-11-23 02:10:06,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597576367] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:06,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:10:06,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:10:06,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477120595] [2021-11-23 02:10:06,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:06,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:10:06,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:06,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:10:06,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:10:06,604 INFO L87 Difference]: Start difference. First operand 570 states and 741 transitions. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:10:06,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:10:06,929 INFO L93 Difference]: Finished difference Result 679 states and 873 transitions. [2021-11-23 02:10:06,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:10:06,930 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) Word has length 54 [2021-11-23 02:10:06,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:10:06,936 INFO L225 Difference]: With dead ends: 679 [2021-11-23 02:10:06,936 INFO L226 Difference]: Without dead ends: 676 [2021-11-23 02:10:06,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:10:06,940 INFO L933 BasicCegarLoop]: 282 mSDtfsCounter, 540 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 540 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:10:06,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [540 Valid, 326 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:10:06,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-11-23 02:10:06,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 569. [2021-11-23 02:10:06,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 413 states have (on average 1.341404358353511) internal successors, (554), 416 states have internal predecessors, (554), 92 states have call successors, (92), 63 states have call predecessors, (92), 62 states have return successors, (91), 91 states have call predecessors, (91), 91 states have call successors, (91) [2021-11-23 02:10:07,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 737 transitions. [2021-11-23 02:10:07,005 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 737 transitions. Word has length 54 [2021-11-23 02:10:07,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:10:07,006 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 737 transitions. [2021-11-23 02:10:07,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (7), 1 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-23 02:10:07,006 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 737 transitions. [2021-11-23 02:10:07,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-23 02:10:07,009 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:10:07,009 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:10:07,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-23 02:10:07,010 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:10:07,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:10:07,011 INFO L85 PathProgramCache]: Analyzing trace with hash 813258136, now seen corresponding path program 1 times [2021-11-23 02:10:07,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:10:07,011 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [617544476] [2021-11-23 02:10:07,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:07,012 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:10:07,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:07,173 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:07,173 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:10:07,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [617544476] [2021-11-23 02:10:07,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [617544476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:10:07,174 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515676419] [2021-11-23 02:10:07,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:10:07,174 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:10:07,174 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:10:07,180 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:10:07,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:10:07,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:10:07,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:10:07,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:10:07,909 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:07,909 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:10:08,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:10:08,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515676419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:10:08,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [295095525] [2021-11-23 02:10:08,194 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:10:08,195 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:10:08,203 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:10:08,210 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:10:08,211 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:10:15,085 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 175 for LOIs [2021-11-23 02:10:15,129 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 171 for LOIs [2021-11-23 02:10:15,167 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 179 for LOIs [2021-11-23 02:10:16,198 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2021-11-23 02:10:16,319 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 175 for LOIs [2021-11-23 02:10:16,444 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 175 for LOIs [2021-11-23 02:10:16,494 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 182 for LOIs [2021-11-23 02:10:16,538 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:10:44,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSifa [295095525] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:10:44,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:10:44,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [5, 5, 4] total 44 [2021-11-23 02:10:44,268 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327374611] [2021-11-23 02:10:44,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:10:44,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-23 02:10:44,269 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:10:44,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-23 02:10:44,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=1683, Unknown=0, NotChecked=0, Total=1892 [2021-11-23 02:10:44,271 INFO L87 Difference]: Start difference. First operand 569 states and 737 transitions. Second operand has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:11:19,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:19,692 INFO L93 Difference]: Finished difference Result 1028 states and 1284 transitions. [2021-11-23 02:11:19,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-23 02:11:19,693 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 55 [2021-11-23 02:11:19,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:19,700 INFO L225 Difference]: With dead ends: 1028 [2021-11-23 02:11:19,700 INFO L226 Difference]: Without dead ends: 618 [2021-11-23 02:11:19,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 123 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 54.0s TimeCoverageRelationStatistics Valid=626, Invalid=4630, Unknown=0, NotChecked=0, Total=5256 [2021-11-23 02:11:19,705 INFO L933 BasicCegarLoop]: 259 mSDtfsCounter, 166 mSDsluCounter, 2151 mSDsCounter, 0 mSdLazyCounter, 5133 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 2326 SdHoareTripleChecker+Invalid, 5309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 5133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:19,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 2326 Invalid, 5309 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [176 Valid, 5133 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2021-11-23 02:11:19,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2021-11-23 02:11:19,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 603. [2021-11-23 02:11:19,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 603 states, 439 states have (on average 1.325740318906606) internal successors, (582), 442 states have internal predecessors, (582), 94 states have call successors, (94), 69 states have call predecessors, (94), 68 states have return successors, (93), 93 states have call predecessors, (93), 93 states have call successors, (93) [2021-11-23 02:11:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 603 states to 603 states and 769 transitions. [2021-11-23 02:11:19,775 INFO L78 Accepts]: Start accepts. Automaton has 603 states and 769 transitions. Word has length 55 [2021-11-23 02:11:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:19,776 INFO L470 AbstractCegarLoop]: Abstraction has 603 states and 769 transitions. [2021-11-23 02:11:19,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 29 states have internal predecessors, (39), 8 states have call successors, (8), 7 states have call predecessors, (8), 7 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2021-11-23 02:11:19,777 INFO L276 IsEmpty]: Start isEmpty. Operand 603 states and 769 transitions. [2021-11-23 02:11:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-23 02:11:19,778 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:19,779 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:19,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:11:19,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:19,997 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:19,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:19,997 INFO L85 PathProgramCache]: Analyzing trace with hash 800912266, now seen corresponding path program 1 times [2021-11-23 02:11:19,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:19,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945092060] [2021-11-23 02:11:19,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:19,998 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:20,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:20,052 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:20,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945092060] [2021-11-23 02:11:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945092060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:20,057 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:20,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:11:20,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888357978] [2021-11-23 02:11:20,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:20,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:11:20,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:20,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:11:20,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:20,060 INFO L87 Difference]: Start difference. First operand 603 states and 769 transitions. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:20,218 INFO L93 Difference]: Finished difference Result 1054 states and 1325 transitions. [2021-11-23 02:11:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:11:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 61 [2021-11-23 02:11:20,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:20,226 INFO L225 Difference]: With dead ends: 1054 [2021-11-23 02:11:20,226 INFO L226 Difference]: Without dead ends: 786 [2021-11-23 02:11:20,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:11:20,228 INFO L933 BasicCegarLoop]: 310 mSDtfsCounter, 44 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:20,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 575 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:11:20,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2021-11-23 02:11:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 657. [2021-11-23 02:11:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 657 states, 483 states have (on average 1.3271221532091098) internal successors, (641), 486 states have internal predecessors, (641), 99 states have call successors, (99), 74 states have call predecessors, (99), 73 states have return successors, (98), 98 states have call predecessors, (98), 98 states have call successors, (98) [2021-11-23 02:11:20,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 657 states to 657 states and 838 transitions. [2021-11-23 02:11:20,295 INFO L78 Accepts]: Start accepts. Automaton has 657 states and 838 transitions. Word has length 61 [2021-11-23 02:11:20,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:20,296 INFO L470 AbstractCegarLoop]: Abstraction has 657 states and 838 transitions. [2021-11-23 02:11:20,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:11:20,296 INFO L276 IsEmpty]: Start isEmpty. Operand 657 states and 838 transitions. [2021-11-23 02:11:20,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-23 02:11:20,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:20,298 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:20,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-23 02:11:20,299 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:20,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:20,299 INFO L85 PathProgramCache]: Analyzing trace with hash -785264281, now seen corresponding path program 1 times [2021-11-23 02:11:20,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697686584] [2021-11-23 02:11:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:20,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:20,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:20,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 02:11:20,414 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:20,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697686584] [2021-11-23 02:11:20,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697686584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:20,415 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:20,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:11:20,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045693669] [2021-11-23 02:11:20,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:20,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:11:20,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:11:20,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:11:20,418 INFO L87 Difference]: Start difference. First operand 657 states and 838 transitions. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:11:21,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:21,260 INFO L93 Difference]: Finished difference Result 1370 states and 2006 transitions. [2021-11-23 02:11:21,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 02:11:21,261 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 58 [2021-11-23 02:11:21,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:21,271 INFO L225 Difference]: With dead ends: 1370 [2021-11-23 02:11:21,271 INFO L226 Difference]: Without dead ends: 1222 [2021-11-23 02:11:21,274 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-23 02:11:21,275 INFO L933 BasicCegarLoop]: 506 mSDtfsCounter, 1173 mSDsluCounter, 827 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1187 SdHoareTripleChecker+Valid, 1176 SdHoareTripleChecker+Invalid, 822 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:21,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1187 Valid, 1176 Invalid, 822 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:11:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1222 states. [2021-11-23 02:11:21,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1222 to 1211. [2021-11-23 02:11:21,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 940 states have (on average 1.4159574468085105) internal successors, (1331), 946 states have internal predecessors, (1331), 172 states have call successors, (172), 98 states have call predecessors, (172), 97 states have return successors, (221), 168 states have call predecessors, (221), 171 states have call successors, (221) [2021-11-23 02:11:21,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1724 transitions. [2021-11-23 02:11:21,387 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1724 transitions. Word has length 58 [2021-11-23 02:11:21,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:21,387 INFO L470 AbstractCegarLoop]: Abstraction has 1211 states and 1724 transitions. [2021-11-23 02:11:21,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 2 states have call successors, (5), 1 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-23 02:11:21,388 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1724 transitions. [2021-11-23 02:11:21,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-23 02:11:21,389 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:21,390 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:21,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-23 02:11:21,390 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:21,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:21,391 INFO L85 PathProgramCache]: Analyzing trace with hash 962895061, now seen corresponding path program 1 times [2021-11-23 02:11:21,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:21,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577075826] [2021-11-23 02:11:21,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:21,392 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:21,493 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:11:21,493 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:21,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577075826] [2021-11-23 02:11:21,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577075826] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:11:21,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:11:21,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-11-23 02:11:21,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654717939] [2021-11-23 02:11:21,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:11:21,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:11:21,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:11:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:11:21,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-11-23 02:11:21,496 INFO L87 Difference]: Start difference. First operand 1211 states and 1724 transitions. Second operand has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:11:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:11:22,297 INFO L93 Difference]: Finished difference Result 1891 states and 2541 transitions. [2021-11-23 02:11:22,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-23 02:11:22,298 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) Word has length 63 [2021-11-23 02:11:22,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:11:22,310 INFO L225 Difference]: With dead ends: 1891 [2021-11-23 02:11:22,310 INFO L226 Difference]: Without dead ends: 1474 [2021-11-23 02:11:22,312 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-11-23 02:11:22,315 INFO L933 BasicCegarLoop]: 243 mSDtfsCounter, 454 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 844 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 1005 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-23 02:11:22,316 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 1005 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 844 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-23 02:11:22,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1474 states. [2021-11-23 02:11:22,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1474 to 1439. [2021-11-23 02:11:22,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1439 states, 1093 states have (on average 1.385178408051235) internal successors, (1514), 1099 states have internal predecessors, (1514), 212 states have call successors, (212), 133 states have call predecessors, (212), 132 states have return successors, (261), 208 states have call predecessors, (261), 211 states have call successors, (261) [2021-11-23 02:11:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1987 transitions. [2021-11-23 02:11:22,449 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1987 transitions. Word has length 63 [2021-11-23 02:11:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:11:22,451 INFO L470 AbstractCegarLoop]: Abstraction has 1439 states and 1987 transitions. [2021-11-23 02:11:22,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 6.285714285714286) internal successors, (44), 7 states have internal predecessors, (44), 4 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (8), 5 states have call predecessors, (8), 4 states have call successors, (8) [2021-11-23 02:11:22,451 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1987 transitions. [2021-11-23 02:11:22,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-23 02:11:22,453 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:11:22,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:11:22,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 02:11:22,453 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:11:22,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:11:22,454 INFO L85 PathProgramCache]: Analyzing trace with hash -151425715, now seen corresponding path program 1 times [2021-11-23 02:11:22,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:11:22,454 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539833369] [2021-11-23 02:11:22,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:22,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:11:22,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:22,565 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:11:22,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:11:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539833369] [2021-11-23 02:11:22,566 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539833369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:11:22,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104103517] [2021-11-23 02:11:22,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:11:22,566 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:11:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:11:22,569 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:11:22,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:11:22,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:11:22,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 376 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 02:11:22,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:11:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:11:23,038 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:11:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:11:23,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104103517] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:11:23,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1028666405] [2021-11-23 02:11:23,278 INFO L159 IcfgInterpreter]: Started Sifa with 54 locations of interest [2021-11-23 02:11:23,278 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:11:23,279 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:11:23,279 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:11:23,279 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:11:34,695 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 175 for LOIs [2021-11-23 02:11:34,735 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 257 for LOIs [2021-11-23 02:11:34,778 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 264 for LOIs [2021-11-23 02:11:34,892 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 179 for LOIs [2021-11-23 02:11:35,485 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 175 for LOIs [2021-11-23 02:11:35,585 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 175 for LOIs [2021-11-23 02:11:35,693 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 175 for LOIs [2021-11-23 02:11:35,731 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 182 for LOIs [2021-11-23 02:11:35,767 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:12:08,607 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '22818#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= ~t5_i~0 0) (= 0 ~t5_pc~0) (= ~E_4~0 2) (= ~t7_i~0 0) (= ~t1_pc~0 0) (= 0 ~t8_pc~0) (= 0 ~t7_pc~0) (= ~T4_E~0 2) (= ~E_7~0 2) (= ~E_8~0 2) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~m_st~0 0) (= ~E_5~0 2) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (= 1 ~c_dr_i~0) (= ~T9_E~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (= ~E_3~0 2) (= 0 ~t3_pc~0) (= 0 ~t6_st~0) (= ~t9_i~0 0) (= ~t2_i~0 0) (= 0 ~t8_st~0) (= ~E_6~0 2) (= ~t4_i~0 0) (= ~t1_st~0 0) (= ~c_num_read~0 1) (= ~T7_E~0 2) (= ~m_i~0 0) (= 0 ~t9_pc~0) (not (= ~c_num_read~0 ~p_num_write~0)) (= ~E_2~0 2) (= ~c_last_read~0 ~q_buf_0~0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= 0 ~t7_st~0) (= ~t8_i~0 0) (= ~token~0 0) (= ~c_dr_pc~0 0) (= ~m_pc~0 0) (= 0 ~t9_st~0) (= ~p_dw_i~0 1) (= 0 ~t2_pc~0) (= |#NULL.offset| 0) (= ~c_last_read~0 ~p_last_write~0) (= ~E_M~0 2) (= ~a_t~0 0) (= 0 ~t2_st~0) (= 0 ~t4_pc~0) (= ~E_1~0 2) (= 0 ~t3_st~0) (= ~T8_E~0 2) (= ~M_E~0 2) (<= 0 |#StackHeapBarrier|) (= ~E_9~0 2) (= ~c_dr_st~0 1) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:12:08,607 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:12:08,607 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:12:08,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 4] total 7 [2021-11-23 02:12:08,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076700606] [2021-11-23 02:12:08,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:12:08,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:12:08,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:08,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:12:08,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:12:08,610 INFO L87 Difference]: Start difference. First operand 1439 states and 1987 transitions. Second operand has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:12:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:09,287 INFO L93 Difference]: Finished difference Result 2984 states and 3854 transitions. [2021-11-23 02:12:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-23 02:12:09,288 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) Word has length 64 [2021-11-23 02:12:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:09,311 INFO L225 Difference]: With dead ends: 2984 [2021-11-23 02:12:09,312 INFO L226 Difference]: Without dead ends: 2981 [2021-11-23 02:12:09,315 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 145 SyntacticMatches, 5 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 983 ImplicationChecksByTransitivity, 32.9s TimeCoverageRelationStatistics Valid=238, Invalid=1924, Unknown=0, NotChecked=0, Total=2162 [2021-11-23 02:12:09,315 INFO L933 BasicCegarLoop]: 397 mSDtfsCounter, 810 mSDsluCounter, 719 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 810 SdHoareTripleChecker+Valid, 972 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:09,317 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [810 Valid, 972 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:12:09,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-11-23 02:12:09,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2179. [2021-11-23 02:12:09,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 1611 states have (on average 1.3482309124767224) internal successors, (2172), 1617 states have internal predecessors, (2172), 330 states have call successors, (330), 237 states have call predecessors, (330), 236 states have return successors, (379), 326 states have call predecessors, (379), 329 states have call successors, (379) [2021-11-23 02:12:09,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 2881 transitions. [2021-11-23 02:12:09,579 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 2881 transitions. Word has length 64 [2021-11-23 02:12:09,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:09,580 INFO L470 AbstractCegarLoop]: Abstraction has 2179 states and 2881 transitions. [2021-11-23 02:12:09,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.857142857142858) internal successors, (90), 7 states have internal predecessors, (90), 6 states have call successors, (23), 4 states have call predecessors, (23), 3 states have return successors, (22), 5 states have call predecessors, (22), 5 states have call successors, (22) [2021-11-23 02:12:09,580 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 2881 transitions. [2021-11-23 02:12:09,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 02:12:09,589 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:09,589 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:09,635 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:09,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 02:12:09,807 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:09,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:09,808 INFO L85 PathProgramCache]: Analyzing trace with hash -50418723, now seen corresponding path program 2 times [2021-11-23 02:12:09,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:09,808 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216650945] [2021-11-23 02:12:09,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:09,808 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:12:09,847 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216650945] [2021-11-23 02:12:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216650945] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:09,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:09,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:12:09,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930450646] [2021-11-23 02:12:09,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:12:09,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:12:09,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:09,850 INFO L87 Difference]: Start difference. First operand 2179 states and 2881 transitions. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:12:10,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:10,094 INFO L93 Difference]: Finished difference Result 2947 states and 3813 transitions. [2021-11-23 02:12:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:10,095 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 67 [2021-11-23 02:12:10,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:10,107 INFO L225 Difference]: With dead ends: 2947 [2021-11-23 02:12:10,107 INFO L226 Difference]: Without dead ends: 1757 [2021-11-23 02:12:10,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:10,112 INFO L933 BasicCegarLoop]: 315 mSDtfsCounter, 299 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 81 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 299 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 81 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:10,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [299 Valid, 383 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 81 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:12:10,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1757 states. [2021-11-23 02:12:10,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1757 to 1747. [2021-11-23 02:12:10,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1747 states, 1307 states have (on average 1.3573068094873757) internal successors, (1774), 1313 states have internal predecessors, (1774), 262 states have call successors, (262), 177 states have call predecessors, (262), 176 states have return successors, (311), 258 states have call predecessors, (311), 261 states have call successors, (311) [2021-11-23 02:12:10,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1747 states to 1747 states and 2347 transitions. [2021-11-23 02:12:10,294 INFO L78 Accepts]: Start accepts. Automaton has 1747 states and 2347 transitions. Word has length 67 [2021-11-23 02:12:10,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:10,294 INFO L470 AbstractCegarLoop]: Abstraction has 1747 states and 2347 transitions. [2021-11-23 02:12:10,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:12:10,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1747 states and 2347 transitions. [2021-11-23 02:12:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-23 02:12:10,298 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:10,299 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:10,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-11-23 02:12:10,299 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:10,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:10,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1848820709, now seen corresponding path program 1 times [2021-11-23 02:12:10,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:10,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091734660] [2021-11-23 02:12:10,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:10,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:10,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:12:10,346 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:10,346 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091734660] [2021-11-23 02:12:10,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091734660] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:10,347 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:10,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:12:10,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847122164] [2021-11-23 02:12:10,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:10,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:12:10,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:10,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:12:10,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:10,349 INFO L87 Difference]: Start difference. First operand 1747 states and 2347 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:12:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:10,600 INFO L93 Difference]: Finished difference Result 2778 states and 3580 transitions. [2021-11-23 02:12:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:10,601 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 71 [2021-11-23 02:12:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:10,615 INFO L225 Difference]: With dead ends: 2778 [2021-11-23 02:12:10,616 INFO L226 Difference]: Without dead ends: 1921 [2021-11-23 02:12:10,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:12:10,621 INFO L933 BasicCegarLoop]: 301 mSDtfsCounter, 39 mSDsluCounter, 313 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 566 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:10,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 566 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:12:10,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1921 states. [2021-11-23 02:12:10,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1921 to 1792. [2021-11-23 02:12:10,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1792 states, 1344 states have (on average 1.3526785714285714) internal successors, (1818), 1350 states have internal predecessors, (1818), 266 states have call successors, (266), 181 states have call predecessors, (266), 180 states have return successors, (315), 262 states have call predecessors, (315), 265 states have call successors, (315) [2021-11-23 02:12:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1792 states to 1792 states and 2399 transitions. [2021-11-23 02:12:10,822 INFO L78 Accepts]: Start accepts. Automaton has 1792 states and 2399 transitions. Word has length 71 [2021-11-23 02:12:10,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:10,822 INFO L470 AbstractCegarLoop]: Abstraction has 1792 states and 2399 transitions. [2021-11-23 02:12:10,823 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 3 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:12:10,823 INFO L276 IsEmpty]: Start isEmpty. Operand 1792 states and 2399 transitions. [2021-11-23 02:12:10,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:12:10,826 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:10,826 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:10,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-23 02:12:10,827 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:10,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:10,827 INFO L85 PathProgramCache]: Analyzing trace with hash 1085703461, now seen corresponding path program 1 times [2021-11-23 02:12:10,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:10,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357750481] [2021-11-23 02:12:10,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:10,828 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:10,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:11,005 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:12:11,006 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:11,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357750481] [2021-11-23 02:12:11,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357750481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:11,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627646397] [2021-11-23 02:12:11,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:11,007 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:11,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:11,012 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:11,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 02:12:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:11,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 02:12:11,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:11,371 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:11,372 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:11,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627646397] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:11,372 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:11,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [14] total 15 [2021-11-23 02:12:11,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440281180] [2021-11-23 02:12:11,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:11,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:12:11,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:11,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:12:11,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:12:11,378 INFO L87 Difference]: Start difference. First operand 1792 states and 2399 transitions. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:11,649 INFO L93 Difference]: Finished difference Result 2621 states and 3417 transitions. [2021-11-23 02:12:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:12:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2021-11-23 02:12:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:11,663 INFO L225 Difference]: With dead ends: 2621 [2021-11-23 02:12:11,663 INFO L226 Difference]: Without dead ends: 1821 [2021-11-23 02:12:11,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:12:11,668 INFO L933 BasicCegarLoop]: 319 mSDtfsCounter, 47 mSDsluCounter, 308 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:11,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 578 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:12:11,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1821 states. [2021-11-23 02:12:11,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1821 to 1788. [2021-11-23 02:12:11,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1788 states, 1340 states have (on average 1.3298507462686566) internal successors, (1782), 1346 states have internal predecessors, (1782), 266 states have call successors, (266), 181 states have call predecessors, (266), 180 states have return successors, (315), 262 states have call predecessors, (315), 265 states have call successors, (315) [2021-11-23 02:12:11,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1788 states to 1788 states and 2363 transitions. [2021-11-23 02:12:11,848 INFO L78 Accepts]: Start accepts. Automaton has 1788 states and 2363 transitions. Word has length 102 [2021-11-23 02:12:11,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:11,849 INFO L470 AbstractCegarLoop]: Abstraction has 1788 states and 2363 transitions. [2021-11-23 02:12:11,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:11,849 INFO L276 IsEmpty]: Start isEmpty. Operand 1788 states and 2363 transitions. [2021-11-23 02:12:11,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-23 02:12:11,852 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:11,853 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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] [2021-11-23 02:12:11,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:12,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:12,073 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:12,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:12,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1632706076, now seen corresponding path program 1 times [2021-11-23 02:12:12,073 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:12,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770269253] [2021-11-23 02:12:12,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:12,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:12,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:12,280 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 15 proven. 13 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 02:12:12,281 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770269253] [2021-11-23 02:12:12,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770269253] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:12,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428039079] [2021-11-23 02:12:12,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:12,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:12,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:12,283 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:12,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 02:12:12,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 504 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-23 02:12:12,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 49 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:12,597 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:12,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428039079] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:12,597 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:12,598 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [14] total 17 [2021-11-23 02:12:12,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910816431] [2021-11-23 02:12:12,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:12,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:12:12,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:12,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:12:12,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:12:12,600 INFO L87 Difference]: Start difference. First operand 1788 states and 2363 transitions. Second operand has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:12,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:12,978 INFO L93 Difference]: Finished difference Result 2672 states and 3433 transitions. [2021-11-23 02:12:12,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 02:12:12,979 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 102 [2021-11-23 02:12:12,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:12,990 INFO L225 Difference]: With dead ends: 2672 [2021-11-23 02:12:12,990 INFO L226 Difference]: Without dead ends: 1619 [2021-11-23 02:12:12,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:12:12,995 INFO L933 BasicCegarLoop]: 314 mSDtfsCounter, 290 mSDsluCounter, 1104 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 1253 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:12,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 1253 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:12:12,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-11-23 02:12:13,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1422. [2021-11-23 02:12:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1422 states, 1106 states have (on average 1.3625678119349005) internal successors, (1507), 1112 states have internal predecessors, (1507), 195 states have call successors, (195), 120 states have call predecessors, (195), 119 states have return successors, (244), 191 states have call predecessors, (244), 194 states have call successors, (244) [2021-11-23 02:12:13,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1422 states to 1422 states and 1946 transitions. [2021-11-23 02:12:13,153 INFO L78 Accepts]: Start accepts. Automaton has 1422 states and 1946 transitions. Word has length 102 [2021-11-23 02:12:13,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:13,154 INFO L470 AbstractCegarLoop]: Abstraction has 1422 states and 1946 transitions. [2021-11-23 02:12:13,154 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 13.6) internal successors, (68), 5 states have internal predecessors, (68), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:13,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1422 states and 1946 transitions. [2021-11-23 02:12:13,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:12:13,159 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:13,159 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 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] [2021-11-23 02:12:13,209 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:13,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:13,372 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:13,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:13,373 INFO L85 PathProgramCache]: Analyzing trace with hash 32165632, now seen corresponding path program 1 times [2021-11-23 02:12:13,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:13,373 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250963177] [2021-11-23 02:12:13,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:13,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:13,444 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:12:13,444 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:13,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250963177] [2021-11-23 02:12:13,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250963177] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:13,445 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:13,445 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:12:13,445 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455430361] [2021-11-23 02:12:13,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:13,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:12:13,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:13,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:12:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:12:13,448 INFO L87 Difference]: Start difference. First operand 1422 states and 1946 transitions. Second operand has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:12:13,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:13,812 INFO L93 Difference]: Finished difference Result 2041 states and 2688 transitions. [2021-11-23 02:12:13,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:12:13,813 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) Word has length 112 [2021-11-23 02:12:13,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:13,824 INFO L225 Difference]: With dead ends: 2041 [2021-11-23 02:12:13,824 INFO L226 Difference]: Without dead ends: 1421 [2021-11-23 02:12:13,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:12:13,830 INFO L933 BasicCegarLoop]: 306 mSDtfsCounter, 351 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 223 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:13,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 523 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 223 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:12:13,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1421 states. [2021-11-23 02:12:13,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1421 to 1412. [2021-11-23 02:12:13,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1412 states, 1096 states have (on average 1.342153284671533) internal successors, (1471), 1102 states have internal predecessors, (1471), 195 states have call successors, (195), 120 states have call predecessors, (195), 119 states have return successors, (244), 191 states have call predecessors, (244), 194 states have call successors, (244) [2021-11-23 02:12:13,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1412 states to 1412 states and 1910 transitions. [2021-11-23 02:12:13,972 INFO L78 Accepts]: Start accepts. Automaton has 1412 states and 1910 transitions. Word has length 112 [2021-11-23 02:12:13,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:13,972 INFO L470 AbstractCegarLoop]: Abstraction has 1412 states and 1910 transitions. [2021-11-23 02:12:13,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.5) internal successors, (66), 4 states have internal predecessors, (66), 4 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 4 states have call predecessors, (16), 4 states have call successors, (16) [2021-11-23 02:12:13,973 INFO L276 IsEmpty]: Start isEmpty. Operand 1412 states and 1910 transitions. [2021-11-23 02:12:13,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-23 02:12:13,976 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:13,977 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:13,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-11-23 02:12:13,977 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:13,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:13,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1925607807, now seen corresponding path program 1 times [2021-11-23 02:12:13,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:13,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806795923] [2021-11-23 02:12:13,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:13,978 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:14,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:14,069 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 25 proven. 8 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 02:12:14,070 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806795923] [2021-11-23 02:12:14,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806795923] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:14,070 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624301930] [2021-11-23 02:12:14,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:14,070 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:14,071 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:14,073 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:14,095 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 02:12:14,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:14,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 539 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-23 02:12:14,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:14,441 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 55 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:12:14,441 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:14,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624301930] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:14,442 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:14,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2021-11-23 02:12:14,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088105492] [2021-11-23 02:12:14,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:14,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:12:14,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:14,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:12:14,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-11-23 02:12:14,447 INFO L87 Difference]: Start difference. First operand 1412 states and 1910 transitions. Second operand has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:14,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:14,847 INFO L93 Difference]: Finished difference Result 1961 states and 2535 transitions. [2021-11-23 02:12:14,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:12:14,848 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) Word has length 112 [2021-11-23 02:12:14,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:14,858 INFO L225 Difference]: With dead ends: 1961 [2021-11-23 02:12:14,859 INFO L226 Difference]: Without dead ends: 1368 [2021-11-23 02:12:14,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:12:14,862 INFO L933 BasicCegarLoop]: 311 mSDtfsCounter, 66 mSDsluCounter, 1699 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 1747 SdHoareTripleChecker+Invalid, 436 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:14,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 1747 Invalid, 436 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:12:14,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1368 states. [2021-11-23 02:12:14,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1368 to 1276. [2021-11-23 02:12:14,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1276 states, 996 states have (on average 1.359437751004016) internal successors, (1354), 1002 states have internal predecessors, (1354), 176 states have call successors, (176), 103 states have call predecessors, (176), 102 states have return successors, (225), 172 states have call predecessors, (225), 175 states have call successors, (225) [2021-11-23 02:12:14,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 1755 transitions. [2021-11-23 02:12:14,998 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 1755 transitions. Word has length 112 [2021-11-23 02:12:14,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:14,999 INFO L470 AbstractCegarLoop]: Abstraction has 1276 states and 1755 transitions. [2021-11-23 02:12:14,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 12.833333333333334) internal successors, (77), 6 states have internal predecessors, (77), 3 states have call successors, (17), 3 states have call predecessors, (17), 3 states have return successors, (16), 3 states have call predecessors, (16), 3 states have call successors, (16) [2021-11-23 02:12:14,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 1755 transitions. [2021-11-23 02:12:15,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2021-11-23 02:12:15,003 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:15,004 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:15,046 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:15,228 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-23 02:12:15,228 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:15,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:15,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1757665269, now seen corresponding path program 1 times [2021-11-23 02:12:15,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:15,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753769687] [2021-11-23 02:12:15,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:15,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:15,312 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 16 proven. 6 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:12:15,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:15,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753769687] [2021-11-23 02:12:15,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753769687] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:15,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010657341] [2021-11-23 02:12:15,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:15,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:15,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:15,317 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:15,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 02:12:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:15,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 541 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 02:12:15,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:15,715 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:12:15,715 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:12:15,716 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1010657341] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:15,716 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:12:15,716 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [8] total 11 [2021-11-23 02:12:15,716 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127776801] [2021-11-23 02:12:15,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:15,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 02:12:15,717 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:15,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 02:12:15,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-11-23 02:12:15,718 INFO L87 Difference]: Start difference. First operand 1276 states and 1755 transitions. Second operand has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:12:16,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:16,062 INFO L93 Difference]: Finished difference Result 2025 states and 2600 transitions. [2021-11-23 02:12:16,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:12:16,063 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) Word has length 113 [2021-11-23 02:12:16,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:16,075 INFO L225 Difference]: With dead ends: 2025 [2021-11-23 02:12:16,075 INFO L226 Difference]: Without dead ends: 1568 [2021-11-23 02:12:16,078 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-11-23 02:12:16,079 INFO L933 BasicCegarLoop]: 303 mSDtfsCounter, 275 mSDsluCounter, 1146 mSDsCounter, 0 mSdLazyCounter, 270 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 1272 SdHoareTripleChecker+Invalid, 273 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 270 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:16,079 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 1272 Invalid, 273 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 270 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 02:12:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-11-23 02:12:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1534. [2021-11-23 02:12:16,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1534 states, 1158 states have (on average 1.3246977547495682) internal successors, (1534), 1170 states have internal predecessors, (1534), 224 states have call successors, (224), 145 states have call predecessors, (224), 150 states have return successors, (285), 220 states have call predecessors, (285), 223 states have call successors, (285) [2021-11-23 02:12:16,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1534 states to 1534 states and 2043 transitions. [2021-11-23 02:12:16,277 INFO L78 Accepts]: Start accepts. Automaton has 1534 states and 2043 transitions. Word has length 113 [2021-11-23 02:12:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:16,277 INFO L470 AbstractCegarLoop]: Abstraction has 1534 states and 2043 transitions. [2021-11-23 02:12:16,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 14.0) internal successors, (70), 5 states have internal predecessors, (70), 3 states have call successors, (15), 3 states have call predecessors, (15), 3 states have return successors, (15), 3 states have call predecessors, (15), 2 states have call successors, (15) [2021-11-23 02:12:16,279 INFO L276 IsEmpty]: Start isEmpty. Operand 1534 states and 2043 transitions. [2021-11-23 02:12:16,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:12:16,282 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:16,283 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:16,321 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 02:12:16,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-23 02:12:16,509 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:16,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:16,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1300964379, now seen corresponding path program 1 times [2021-11-23 02:12:16,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:16,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829516549] [2021-11-23 02:12:16,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:16,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:16,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 33 proven. 0 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:12:16,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:16,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829516549] [2021-11-23 02:12:16,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829516549] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:12:16,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:12:16,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-11-23 02:12:16,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737051994] [2021-11-23 02:12:16,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:12:16,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 02:12:16,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:12:16,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 02:12:16,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-23 02:12:16,682 INFO L87 Difference]: Start difference. First operand 1534 states and 2043 transitions. Second operand has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-23 02:12:17,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:12:17,627 INFO L93 Difference]: Finished difference Result 2213 states and 2806 transitions. [2021-11-23 02:12:17,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 02:12:17,627 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) Word has length 114 [2021-11-23 02:12:17,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:12:17,640 INFO L225 Difference]: With dead ends: 2213 [2021-11-23 02:12:17,640 INFO L226 Difference]: Without dead ends: 1498 [2021-11-23 02:12:17,643 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-11-23 02:12:17,644 INFO L933 BasicCegarLoop]: 289 mSDtfsCounter, 862 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1059 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 887 SdHoareTripleChecker+Valid, 1148 SdHoareTripleChecker+Invalid, 1278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 1059 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:12:17,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [887 Valid, 1148 Invalid, 1278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 1059 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2021-11-23 02:12:17,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1498 states. [2021-11-23 02:12:17,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1498 to 1478. [2021-11-23 02:12:17,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1478 states, 1122 states have (on average 1.3279857397504455) internal successors, (1490), 1138 states have internal predecessors, (1490), 209 states have call successors, (209), 133 states have call predecessors, (209), 145 states have return successors, (276), 208 states have call predecessors, (276), 208 states have call successors, (276) [2021-11-23 02:12:17,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1478 states to 1478 states and 1975 transitions. [2021-11-23 02:12:17,813 INFO L78 Accepts]: Start accepts. Automaton has 1478 states and 1975 transitions. Word has length 114 [2021-11-23 02:12:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:12:17,814 INFO L470 AbstractCegarLoop]: Abstraction has 1478 states and 1975 transitions. [2021-11-23 02:12:17,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 7 states have (on average 10.285714285714286) internal successors, (72), 7 states have internal predecessors, (72), 6 states have call successors, (16), 4 states have call predecessors, (16), 4 states have return successors, (16), 6 states have call predecessors, (16), 6 states have call successors, (16) [2021-11-23 02:12:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 1478 states and 1975 transitions. [2021-11-23 02:12:17,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-23 02:12:17,819 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:12:17,819 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:12:17,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-11-23 02:12:17,820 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:12:17,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:12:17,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1443091220, now seen corresponding path program 1 times [2021-11-23 02:12:17,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:12:17,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743203875] [2021-11-23 02:12:17,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:17,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:12:17,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 15 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-23 02:12:18,162 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:12:18,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743203875] [2021-11-23 02:12:18,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743203875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:12:18,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401196789] [2021-11-23 02:12:18,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:12:18,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:12:18,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:12:18,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:12:18,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 02:12:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:12:18,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-23 02:12:18,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:12:19,414 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 31 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:12:19,415 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:12:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 13 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-23 02:12:21,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401196789] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:12:21,481 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1931092791] [2021-11-23 02:12:21,485 INFO L159 IcfgInterpreter]: Started Sifa with 68 locations of interest [2021-11-23 02:12:21,485 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:12:21,486 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:12:21,486 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:12:21,487 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:13:07,209 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 312 for LOIs [2021-11-23 02:13:08,079 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 263 for LOIs [2021-11-23 02:13:08,168 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 128 for LOIs [2021-11-23 02:13:08,185 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 324 for LOIs [2021-11-23 02:13:10,453 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 182 for LOIs [2021-11-23 02:13:10,770 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 128 for LOIs [2021-11-23 02:13:11,042 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 316 for LOIs [2021-11-23 02:13:11,871 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 339 for LOIs [2021-11-23 02:13:12,361 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:14:20,075 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '78195#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (= ~t7_i~0 0) (= 0 ~t8_pc~0) (= ~T4_E~0 2) (<= 0 ~c_dr_pc~0) (<= 0 ~p_dw_st~0) (= 0 ~t4_st~0) (= ~T1_E~0 2) (= ~T5_E~0 2) (<= 0 ~p_dw_pc~0) (= ~q_free~0 1) (<= 0 ~p_num_write~0) (= ~T2_E~0 2) (<= ~c_dr_pc~0 1) (= 1 ~c_dr_i~0) (<= ~p_dw_st~0 2) (= 0 ~t6_pc~0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (= ~E_3~0 2) (<= ~t7_pc~0 0) (= 0 ~t6_st~0) (<= ~t1_pc~0 0) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (<= ~t5_i~0 0) (<= 2 ~T8_E~0) (<= 1 ~c_dr_st~0) (<= 2 ~E_9~0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (= ~E_2~0 2) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~t2_i~0) (<= ~t3_st~0 0) (= ~T3_E~0 2) (= ~local~0 0) (= ~t3_i~0 0) (= ~token~0 0) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (= 0 ~t2_pc~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= ~c_dr_st~0 1) (<= 2 ~T9_E~0) (= ~E_M~0 2) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (= 0 ~t2_st~0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (= ~t1_i~0 0) (= |#NULL.base| 0))' at error location [2021-11-23 02:14:20,076 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:14:20,076 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:14:20,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 16] total 49 [2021-11-23 02:14:20,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507848038] [2021-11-23 02:14:20,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:14:20,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:14:20,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:20,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:14:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=774, Invalid=9938, Unknown=0, NotChecked=0, Total=10712 [2021-11-23 02:14:20,082 INFO L87 Difference]: Start difference. First operand 1478 states and 1975 transitions. Second operand has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2021-11-23 02:14:35,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:35,954 INFO L93 Difference]: Finished difference Result 3284 states and 4092 transitions. [2021-11-23 02:14:35,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 213 states. [2021-11-23 02:14:35,954 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) Word has length 114 [2021-11-23 02:14:35,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:35,970 INFO L225 Difference]: With dead ends: 3284 [2021-11-23 02:14:35,971 INFO L226 Difference]: Without dead ends: 2625 [2021-11-23 02:14:35,992 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 288 SyntacticMatches, 4 SemanticMatches, 306 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38778 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=8345, Invalid=86211, Unknown=0, NotChecked=0, Total=94556 [2021-11-23 02:14:35,993 INFO L933 BasicCegarLoop]: 331 mSDtfsCounter, 4715 mSDsluCounter, 3855 mSDsCounter, 0 mSdLazyCounter, 8042 mSolverCounterSat, 2577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4719 SdHoareTripleChecker+Valid, 3682 SdHoareTripleChecker+Invalid, 10619 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2577 IncrementalHoareTripleChecker+Valid, 8042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:35,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [4719 Valid, 3682 Invalid, 10619 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2577 Valid, 8042 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2021-11-23 02:14:35,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2625 states. [2021-11-23 02:14:36,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2625 to 1650. [2021-11-23 02:14:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1650 states, 1238 states have (on average 1.3109854604200324) internal successors, (1623), 1256 states have internal predecessors, (1623), 235 states have call successors, (235), 154 states have call predecessors, (235), 175 states have return successors, (312), 241 states have call predecessors, (312), 234 states have call successors, (312) [2021-11-23 02:14:36,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1650 states to 1650 states and 2170 transitions. [2021-11-23 02:14:36,195 INFO L78 Accepts]: Start accepts. Automaton has 1650 states and 2170 transitions. Word has length 114 [2021-11-23 02:14:36,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:36,196 INFO L470 AbstractCegarLoop]: Abstraction has 1650 states and 2170 transitions. [2021-11-23 02:14:36,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 32 states have (on average 6.09375) internal successors, (195), 37 states have internal predecessors, (195), 17 states have call successors, (44), 14 states have call predecessors, (44), 22 states have return successors, (46), 17 states have call predecessors, (46), 17 states have call successors, (46) [2021-11-23 02:14:36,197 INFO L276 IsEmpty]: Start isEmpty. Operand 1650 states and 2170 transitions. [2021-11-23 02:14:36,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:14:36,201 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:36,201 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:36,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:36,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:36,425 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:36,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1030973152, now seen corresponding path program 1 times [2021-11-23 02:14:36,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:36,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433894956] [2021-11-23 02:14:36,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:36,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 23 proven. 11 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-23 02:14:36,588 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:36,588 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433894956] [2021-11-23 02:14:36,588 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433894956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:36,589 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89681995] [2021-11-23 02:14:36,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:36,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:36,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:36,591 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:36,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 02:14:36,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:36,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-23 02:14:36,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:36,916 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 35 proven. 2 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:14:36,916 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:37,190 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2021-11-23 02:14:37,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89681995] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:37,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:14:37,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [14, 8] total 20 [2021-11-23 02:14:37,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170350244] [2021-11-23 02:14:37,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:14:37,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-23 02:14:37,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:14:37,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-23 02:14:37,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-11-23 02:14:37,192 INFO L87 Difference]: Start difference. First operand 1650 states and 2170 transitions. Second operand has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:14:37,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:14:37,913 INFO L93 Difference]: Finished difference Result 2883 states and 3598 transitions. [2021-11-23 02:14:37,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 02:14:37,914 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 115 [2021-11-23 02:14:37,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:14:37,924 INFO L225 Difference]: With dead ends: 2883 [2021-11-23 02:14:37,924 INFO L226 Difference]: Without dead ends: 2052 [2021-11-23 02:14:37,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=552, Unknown=0, NotChecked=0, Total=650 [2021-11-23 02:14:37,927 INFO L933 BasicCegarLoop]: 299 mSDtfsCounter, 458 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 760 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 462 SdHoareTripleChecker+Valid, 606 SdHoareTripleChecker+Invalid, 865 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 760 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:14:37,928 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [462 Valid, 606 Invalid, 865 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 760 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:14:37,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2021-11-23 02:14:38,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1800. [2021-11-23 02:14:38,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1800 states, 1328 states have (on average 1.2981927710843373) internal successors, (1724), 1352 states have internal predecessors, (1724), 264 states have call successors, (264), 173 states have call predecessors, (264), 206 states have return successors, (371), 276 states have call predecessors, (371), 263 states have call successors, (371) [2021-11-23 02:14:38,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1800 states to 1800 states and 2359 transitions. [2021-11-23 02:14:38,136 INFO L78 Accepts]: Start accepts. Automaton has 1800 states and 2359 transitions. Word has length 115 [2021-11-23 02:14:38,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:14:38,137 INFO L470 AbstractCegarLoop]: Abstraction has 1800 states and 2359 transitions. [2021-11-23 02:14:38,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:14:38,137 INFO L276 IsEmpty]: Start isEmpty. Operand 1800 states and 2359 transitions. [2021-11-23 02:14:38,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-23 02:14:38,141 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:14:38,141 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:14:38,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 02:14:38,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:38,357 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:14:38,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:14:38,357 INFO L85 PathProgramCache]: Analyzing trace with hash 113144421, now seen corresponding path program 1 times [2021-11-23 02:14:38,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:14:38,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337247917] [2021-11-23 02:14:38,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:38,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:14:38,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:38,649 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 20 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-23 02:14:38,649 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:14:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337247917] [2021-11-23 02:14:38,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337247917] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:14:38,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29384029] [2021-11-23 02:14:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:14:38,650 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:14:38,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:14:38,651 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:14:38,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 02:14:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:14:38,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 579 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-23 02:14:38,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:14:39,754 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 60 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:14:39,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:14:41,540 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 13 proven. 44 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2021-11-23 02:14:41,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29384029] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 02:14:41,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [282570317] [2021-11-23 02:14:41,544 INFO L159 IcfgInterpreter]: Started Sifa with 69 locations of interest [2021-11-23 02:14:41,544 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:14:41,545 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:14:41,545 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:14:41,545 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:14:59,436 INFO L197 IcfgInterpreter]: Interpreting procedure reset_delta_events1 with input of size 312 for LOIs [2021-11-23 02:15:00,005 INFO L197 IcfgInterpreter]: Interpreting procedure error1 with input of size 261 for LOIs [2021-11-23 02:15:00,088 INFO L197 IcfgInterpreter]: Interpreting procedure exists_runnable_thread1 with input of size 258 for LOIs [2021-11-23 02:15:00,179 INFO L197 IcfgInterpreter]: Interpreting procedure activate_threads1 with input of size 324 for LOIs [2021-11-23 02:15:02,487 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_write_p_triggered with input of size 182 for LOIs [2021-11-23 02:15:02,813 INFO L197 IcfgInterpreter]: Interpreting procedure is_do_read_c_triggered with input of size 130 for LOIs [2021-11-23 02:15:03,099 INFO L197 IcfgInterpreter]: Interpreting procedure fire_delta_events1 with input of size 316 for LOIs [2021-11-23 02:15:03,584 INFO L197 IcfgInterpreter]: Interpreting procedure update_channels1 with input of size 339 for LOIs [2021-11-23 02:15:04,116 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:16:28,490 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '94053#(and (= ~q_req_up~0 1) (= ~T6_E~0 2) (= ~t6_i~0 0) (= 0 ~t5_pc~0) (<= 2 ~T4_E~0) (<= 1 ~c_dr_i~0) (<= 0 ~t3_i~0) (= ~t7_i~0 0) (<= 0 ~t8_pc~0) (<= ~E_3~0 2) (<= ~t4_st~0 0) (<= 0 ~t1_i~0) (<= 0 ~p_dw_st~0) (<= 0 ~t6_st~0) (<= 0 ~local~0) (<= 2 ~E_M~0) (= ~T1_E~0 2) (<= 0 ~t2_pc~0) (<= ~c_dr_i~0 1) (= ~T5_E~0 2) (<= 2 ~T3_E~0) (<= 0 ~p_dw_pc~0) (<= ~t2_st~0 0) (= ~q_free~0 1) (<= ~E_2~0 2) (<= 0 ~p_num_write~0) (<= ~token~0 0) (= ~T2_E~0 2) (<= ~p_dw_st~0 2) (<= ~t6_pc~0 0) (= 0 ~t5_st~0) (<= 0 ~t7_st~0) (<= ~T7_E~0 2) (<= ~t7_pc~0 0) (<= ~t1_pc~0 0) (<= ~T4_E~0 2) (<= ~t8_i~0 0) (<= 2 ~M_E~0) (<= ~T9_E~0 2) (= ~t9_i~0 0) (<= |#NULL.offset| 0) (= ~t4_i~0 0) (<= 0 ~t9_st~0) (= ~c_dr_pc~0 1) (<= ~t5_i~0 0) (<= 2 ~E_2~0) (<= 2 ~T8_E~0) (<= 2 ~E_9~0) (<= ~local~0 0) (<= 2 ~E_6~0) (= ~m_i~0 0) (<= ~t2_i~0 0) (<= 2 ~E_8~0) (<= ~t8_st~0 0) (not (= ~c_num_read~0 ~p_num_write~0)) (<= ~T3_E~0 2) (<= ~E_4~0 2) (<= 2 ~E_7~0) (<= 2 ~E_3~0) (<= ~t9_pc~0 0) (<= 0 ~t5_i~0) (<= 0 ~t8_st~0) (<= ~t9_st~0 0) (<= ~T8_E~0 2) (<= ~E_6~0 2) (<= 0 ~token~0) (<= 0 ~t2_i~0) (= ~c_last_read~0 ~q_buf_0~0) (<= ~t3_st~0 0) (<= 0 ~t6_pc~0) (<= ~c_num_read~0 1) (<= 0 ~t3_st~0) (<= ~m_pc~0 0) (<= ~t1_i~0 0) (<= 2 ~E_4~0) (= ~p_dw_i~0 1) (<= 2 ~T7_E~0) (<= ~M_E~0 2) (<= ~E_5~0 2) (<= ~m_st~0 0) (<= ~t3_pc~0 0) (= ~c_last_read~0 ~p_last_write~0) (<= 0 ~m_pc~0) (<= 2 ~T9_E~0) (<= ~t3_i~0 0) (<= 0 ~t2_st~0) (<= 0 ~t3_pc~0) (<= 0 ~t7_pc~0) (<= ~t7_st~0 0) (<= ~E_8~0 2) (<= 0 ~t9_pc~0) (<= 2 ~E_5~0) (<= 0 ~t8_i~0) (<= 1 ~c_num_read~0) (<= 0 ~m_st~0) (<= 0 |#NULL.offset|) (<= ~t4_pc~0 0) (= ~E_1~0 2) (<= 0 ~t4_pc~0) (<= ~t2_pc~0 0) (<= ~t1_st~0 0) (<= 0 |#StackHeapBarrier|) (<= ~E_M~0 2) (= ~c_dr_st~0 1) (<= ~t6_st~0 0) (<= 0 ~t1_st~0) (<= ~E_7~0 2) (<= ~t8_pc~0 0) (<= ~E_9~0 2) (<= 0 ~t1_pc~0) (<= 0 ~t4_st~0) (= |#NULL.base| 0))' at error location [2021-11-23 02:16:28,490 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:16:28,490 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 02:16:28,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 18] total 52 [2021-11-23 02:16:28,490 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778308432] [2021-11-23 02:16:28,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 02:16:28,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-23 02:16:28,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:28,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-23 02:16:28,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=912, Invalid=11078, Unknown=0, NotChecked=0, Total=11990 [2021-11-23 02:16:28,494 INFO L87 Difference]: Start difference. First operand 1800 states and 2359 transitions. Second operand has 52 states, 36 states have (on average 6.0) internal successors, (216), 40 states have internal predecessors, (216), 22 states have call successors, (49), 16 states have call predecessors, (49), 23 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-23 02:16:39,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:39,523 INFO L93 Difference]: Finished difference Result 4424 states and 5442 transitions. [2021-11-23 02:16:39,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-23 02:16:39,524 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 36 states have (on average 6.0) internal successors, (216), 40 states have internal predecessors, (216), 22 states have call successors, (49), 16 states have call predecessors, (49), 23 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) Word has length 124 [2021-11-23 02:16:39,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:39,538 INFO L225 Difference]: With dead ends: 4424 [2021-11-23 02:16:39,538 INFO L226 Difference]: Without dead ends: 3443 [2021-11-23 02:16:39,545 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 324 SyntacticMatches, 5 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20037 ImplicationChecksByTransitivity, 91.3s TimeCoverageRelationStatistics Valid=5011, Invalid=44495, Unknown=0, NotChecked=0, Total=49506 [2021-11-23 02:16:39,546 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 5964 mSDsluCounter, 2970 mSDsCounter, 0 mSdLazyCounter, 7235 mSolverCounterSat, 3882 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5965 SdHoareTripleChecker+Valid, 2774 SdHoareTripleChecker+Invalid, 11117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3882 IncrementalHoareTripleChecker+Valid, 7235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:39,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5965 Valid, 2774 Invalid, 11117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3882 Valid, 7235 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2021-11-23 02:16:39,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3443 states. [2021-11-23 02:16:39,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3443 to 2223. [2021-11-23 02:16:39,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2223 states, 1641 states have (on average 1.275441803778184) internal successors, (2093), 1655 states have internal predecessors, (2093), 327 states have call successors, (327), 222 states have call predecessors, (327), 253 states have return successors, (426), 347 states have call predecessors, (426), 326 states have call successors, (426) [2021-11-23 02:16:39,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2223 states to 2223 states and 2846 transitions. [2021-11-23 02:16:39,850 INFO L78 Accepts]: Start accepts. Automaton has 2223 states and 2846 transitions. Word has length 124 [2021-11-23 02:16:39,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:39,850 INFO L470 AbstractCegarLoop]: Abstraction has 2223 states and 2846 transitions. [2021-11-23 02:16:39,851 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 36 states have (on average 6.0) internal successors, (216), 40 states have internal predecessors, (216), 22 states have call successors, (49), 16 states have call predecessors, (49), 23 states have return successors, (51), 22 states have call predecessors, (51), 22 states have call successors, (51) [2021-11-23 02:16:39,851 INFO L276 IsEmpty]: Start isEmpty. Operand 2223 states and 2846 transitions. [2021-11-23 02:16:39,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:16:39,854 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:39,855 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:39,887 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:40,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-23 02:16:40,072 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash 242274193, now seen corresponding path program 1 times [2021-11-23 02:16:40,072 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:40,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9946609] [2021-11-23 02:16:40,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:40,072 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:40,129 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:40,129 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9946609] [2021-11-23 02:16:40,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9946609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:40,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118118225] [2021-11-23 02:16:40,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:40,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:40,131 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:40,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-23 02:16:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:16:40,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:40,505 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 02:16:40,505 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:16:40,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118118225] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:40,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:16:40,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:16:40,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545933641] [2021-11-23 02:16:40,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:40,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:40,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:40,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:40,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:40,507 INFO L87 Difference]: Start difference. First operand 2223 states and 2846 transitions. Second operand has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:40,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:40,900 INFO L93 Difference]: Finished difference Result 3611 states and 5139 transitions. [2021-11-23 02:16:40,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:40,901 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 02:16:40,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:40,911 INFO L225 Difference]: With dead ends: 3611 [2021-11-23 02:16:40,911 INFO L226 Difference]: Without dead ends: 2909 [2021-11-23 02:16:40,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:40,916 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 291 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:40,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:40,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2909 states. [2021-11-23 02:16:41,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2909 to 2902. [2021-11-23 02:16:41,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2203 states have (on average 1.3327280980481162) internal successors, (2936), 2220 states have internal predecessors, (2936), 414 states have call successors, (414), 252 states have call predecessors, (414), 283 states have return successors, (559), 431 states have call predecessors, (559), 413 states have call successors, (559) [2021-11-23 02:16:41,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 3909 transitions. [2021-11-23 02:16:41,242 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 3909 transitions. Word has length 115 [2021-11-23 02:16:41,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:41,242 INFO L470 AbstractCegarLoop]: Abstraction has 2902 states and 3909 transitions. [2021-11-23 02:16:41,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.333333333333332) internal successors, (73), 2 states have internal predecessors, (73), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:41,243 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 3909 transitions. [2021-11-23 02:16:41,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:16:41,248 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:41,248 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:41,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:41,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-23 02:16:41,465 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:41,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:41,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1778244461, now seen corresponding path program 1 times [2021-11-23 02:16:41,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:41,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067258898] [2021-11-23 02:16:41,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:41,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:41,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:41,519 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:41,519 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067258898] [2021-11-23 02:16:41,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067258898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:41,520 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372870593] [2021-11-23 02:16:41,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:41,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:41,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:41,527 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:41,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-23 02:16:41,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:41,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 834 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:16:41,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:41,834 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 02:16:41,834 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:16:41,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372870593] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:41,834 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:16:41,835 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:16:41,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220263800] [2021-11-23 02:16:41,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:41,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:41,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:41,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:41,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:41,836 INFO L87 Difference]: Start difference. First operand 2902 states and 3909 transitions. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:42,275 INFO L93 Difference]: Finished difference Result 5633 states and 8393 transitions. [2021-11-23 02:16:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:42,275 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 02:16:42,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:42,288 INFO L225 Difference]: With dead ends: 5633 [2021-11-23 02:16:42,289 INFO L226 Difference]: Without dead ends: 4252 [2021-11-23 02:16:42,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:42,296 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 288 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:42,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [288 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:42,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-11-23 02:16:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 4240. [2021-11-23 02:16:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 3312 states have (on average 1.3864734299516908) internal successors, (4592), 3335 states have internal predecessors, (4592), 583 states have call successors, (583), 312 states have call predecessors, (583), 343 states have return successors, (816), 594 states have call predecessors, (816), 582 states have call successors, (816) [2021-11-23 02:16:42,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 5991 transitions. [2021-11-23 02:16:42,662 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 5991 transitions. Word has length 115 [2021-11-23 02:16:42,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:42,663 INFO L470 AbstractCegarLoop]: Abstraction has 4240 states and 5991 transitions. [2021-11-23 02:16:42,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 2 states have internal predecessors, (76), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:42,663 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 5991 transitions. [2021-11-23 02:16:42,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:16:42,671 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:42,671 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:42,710 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:42,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:42,896 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:42,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:42,897 INFO L85 PathProgramCache]: Analyzing trace with hash -384909615, now seen corresponding path program 1 times [2021-11-23 02:16:42,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:42,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310663893] [2021-11-23 02:16:42,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:42,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:42,978 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:42,979 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310663893] [2021-11-23 02:16:42,979 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310663893] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:42,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3722309] [2021-11-23 02:16:42,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:42,979 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:42,980 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:42,980 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:42,986 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 02:16:43,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:43,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 828 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:16:43,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:43,339 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-23 02:16:43,339 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:16:43,339 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [3722309] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:43,339 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:16:43,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:16:43,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626309900] [2021-11-23 02:16:43,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:43,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:43,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:43,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:43,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:43,341 INFO L87 Difference]: Start difference. First operand 4240 states and 5991 transitions. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:43,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:43,981 INFO L93 Difference]: Finished difference Result 9617 states and 14760 transitions. [2021-11-23 02:16:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 02:16:43,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:44,010 INFO L225 Difference]: With dead ends: 9617 [2021-11-23 02:16:44,010 INFO L226 Difference]: Without dead ends: 6898 [2021-11-23 02:16:44,026 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:44,027 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 282 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:44,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:44,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6898 states. [2021-11-23 02:16:44,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6898 to 6876. [2021-11-23 02:16:44,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6876 states, 5500 states have (on average 1.4261818181818182) internal successors, (7844), 5535 states have internal predecessors, (7844), 911 states have call successors, (911), 432 states have call predecessors, (911), 463 states have return successors, (1312), 910 states have call predecessors, (1312), 910 states have call successors, (1312) [2021-11-23 02:16:44,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6876 states to 6876 states and 10067 transitions. [2021-11-23 02:16:44,767 INFO L78 Accepts]: Start accepts. Automaton has 6876 states and 10067 transitions. Word has length 115 [2021-11-23 02:16:44,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:44,768 INFO L470 AbstractCegarLoop]: Abstraction has 6876 states and 10067 transitions. [2021-11-23 02:16:44,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 2 states have internal predecessors, (82), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:44,768 INFO L276 IsEmpty]: Start isEmpty. Operand 6876 states and 10067 transitions. [2021-11-23 02:16:44,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:16:44,781 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:44,781 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:44,819 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:44,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-23 02:16:44,995 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:44,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:44,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1060331407, now seen corresponding path program 1 times [2021-11-23 02:16:44,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:44,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980200303] [2021-11-23 02:16:44,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:44,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:45,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:45,071 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-23 02:16:45,073 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:45,073 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980200303] [2021-11-23 02:16:45,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980200303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:45,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827506051] [2021-11-23 02:16:45,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:45,074 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:45,074 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:45,075 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:45,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-23 02:16:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:45,248 INFO L263 TraceCheckSpWp]: Trace formula consists of 822 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 02:16:45,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:45,438 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 26 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 02:16:45,439 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 02:16:45,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827506051] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:45,439 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 02:16:45,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-23 02:16:45,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186559125] [2021-11-23 02:16:45,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:45,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:45,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:45,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:45,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:45,441 INFO L87 Difference]: Start difference. First operand 6876 states and 10067 transitions. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:46,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:46,410 INFO L93 Difference]: Finished difference Result 17465 states and 27212 transitions. [2021-11-23 02:16:46,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:46,410 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 115 [2021-11-23 02:16:46,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:46,461 INFO L225 Difference]: With dead ends: 17465 [2021-11-23 02:16:46,462 INFO L226 Difference]: Without dead ends: 12110 [2021-11-23 02:16:46,487 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 02:16:46,488 INFO L933 BasicCegarLoop]: 281 mSDtfsCounter, 276 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 98 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:46,488 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 462 Invalid, 98 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:46,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12110 states. [2021-11-23 02:16:47,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12110 to 12068. [2021-11-23 02:16:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12068 states, 9816 states have (on average 1.4494702526487369) internal successors, (14228), 9875 states have internal predecessors, (14228), 1547 states have call successors, (1547), 672 states have call predecessors, (1547), 703 states have return successors, (2268), 1522 states have call predecessors, (2268), 1546 states have call successors, (2268) [2021-11-23 02:16:47,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12068 states to 12068 states and 18043 transitions. [2021-11-23 02:16:47,597 INFO L78 Accepts]: Start accepts. Automaton has 12068 states and 18043 transitions. Word has length 115 [2021-11-23 02:16:47,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:47,597 INFO L470 AbstractCegarLoop]: Abstraction has 12068 states and 18043 transitions. [2021-11-23 02:16:47,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 2 states have internal predecessors, (88), 2 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2021-11-23 02:16:47,598 INFO L276 IsEmpty]: Start isEmpty. Operand 12068 states and 18043 transitions. [2021-11-23 02:16:47,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-11-23 02:16:47,625 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:47,625 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:47,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2021-11-23 02:16:47,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-23 02:16:47,841 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:47,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1298733363, now seen corresponding path program 1 times [2021-11-23 02:16:47,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:47,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427250540] [2021-11-23 02:16:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:47,841 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:47,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:47,902 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-23 02:16:47,902 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:47,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427250540] [2021-11-23 02:16:47,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427250540] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:47,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:47,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:47,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719687374] [2021-11-23 02:16:47,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:47,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:47,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:47,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:47,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:47,905 INFO L87 Difference]: Start difference. First operand 12068 states and 18043 transitions. Second operand has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:16:49,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:49,057 INFO L93 Difference]: Finished difference Result 22918 states and 35628 transitions. [2021-11-23 02:16:49,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:49,058 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) Word has length 115 [2021-11-23 02:16:49,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:49,119 INFO L225 Difference]: With dead ends: 22918 [2021-11-23 02:16:49,120 INFO L226 Difference]: Without dead ends: 14468 [2021-11-23 02:16:49,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:49,155 INFO L933 BasicCegarLoop]: 368 mSDtfsCounter, 101 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 641 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:49,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 641 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:49,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14468 states. [2021-11-23 02:16:50,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14468 to 13652. [2021-11-23 02:16:50,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13652 states, 11336 states have (on average 1.4880028228652082) internal successors, (16868), 11395 states have internal predecessors, (16868), 1579 states have call successors, (1579), 704 states have call predecessors, (1579), 735 states have return successors, (2300), 1554 states have call predecessors, (2300), 1578 states have call successors, (2300) [2021-11-23 02:16:50,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13652 states to 13652 states and 20747 transitions. [2021-11-23 02:16:50,345 INFO L78 Accepts]: Start accepts. Automaton has 13652 states and 20747 transitions. Word has length 115 [2021-11-23 02:16:50,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:50,345 INFO L470 AbstractCegarLoop]: Abstraction has 13652 states and 20747 transitions. [2021-11-23 02:16:50,345 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.333333333333332) internal successors, (67), 3 states have internal predecessors, (67), 2 states have call successors, (8), 1 states have call predecessors, (8), 1 states have return successors, (8), 2 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-23 02:16:50,345 INFO L276 IsEmpty]: Start isEmpty. Operand 13652 states and 20747 transitions. [2021-11-23 02:16:50,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-23 02:16:50,366 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:50,367 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:50,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-11-23 02:16:50,367 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting error1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:50,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:50,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1184495361, now seen corresponding path program 1 times [2021-11-23 02:16:50,368 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:50,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971841189] [2021-11-23 02:16:50,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:50,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:50,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:50,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-23 02:16:50,448 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971841189] [2021-11-23 02:16:50,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971841189] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:50,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [832127487] [2021-11-23 02:16:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:50,449 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:50,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:16:50,456 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:16:50,462 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-23 02:16:50,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:50,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-23 02:16:50,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:16:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 50 proven. 17 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 02:16:50,796 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:16:51,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-23 02:16:51,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [832127487] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 02:16:51,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:16:51,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9, 10] total 17 [2021-11-23 02:16:51,094 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937795760] [2021-11-23 02:16:51,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:51,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 02:16:51,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:51,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 02:16:51,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2021-11-23 02:16:51,095 INFO L87 Difference]: Start difference. First operand 13652 states and 20747 transitions. Second operand has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:16:52,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:52,523 INFO L93 Difference]: Finished difference Result 14392 states and 21586 transitions. [2021-11-23 02:16:52,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 02:16:52,524 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) Word has length 125 [2021-11-23 02:16:52,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:52,565 INFO L225 Difference]: With dead ends: 14392 [2021-11-23 02:16:52,566 INFO L226 Difference]: Without dead ends: 12988 [2021-11-23 02:16:52,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-11-23 02:16:52,575 INFO L933 BasicCegarLoop]: 285 mSDtfsCounter, 629 mSDsluCounter, 654 mSDsCounter, 0 mSdLazyCounter, 949 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 631 SdHoareTripleChecker+Valid, 825 SdHoareTripleChecker+Invalid, 1107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:52,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [631 Valid, 825 Invalid, 1107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 949 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 02:16:52,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12988 states. [2021-11-23 02:16:53,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12988 to 12671. [2021-11-23 02:16:53,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12671 states, 10643 states have (on average 1.5084092830968712) internal successors, (16054), 10700 states have internal predecessors, (16054), 1432 states have call successors, (1432), 585 states have call predecessors, (1432), 594 states have return successors, (2120), 1387 states have call predecessors, (2120), 1431 states have call successors, (2120) [2021-11-23 02:16:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12671 states to 12671 states and 19606 transitions. [2021-11-23 02:16:53,670 INFO L78 Accepts]: Start accepts. Automaton has 12671 states and 19606 transitions. Word has length 125 [2021-11-23 02:16:53,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:53,670 INFO L470 AbstractCegarLoop]: Abstraction has 12671 states and 19606 transitions. [2021-11-23 02:16:53,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 4 states have call successors, (16), 3 states have call predecessors, (16), 3 states have return successors, (15), 4 states have call predecessors, (15), 3 states have call successors, (15) [2021-11-23 02:16:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 12671 states and 19606 transitions. [2021-11-23 02:16:53,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:16:53,713 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:53,713 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:53,751 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-23 02:16:53,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8264f237-dab5-4f83-8a3f-59a8fe5cd009/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:16:53,928 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:53,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 508960707, now seen corresponding path program 1 times [2021-11-23 02:16:53,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:53,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159512577] [2021-11-23 02:16:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:53,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:16:53,995 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:53,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159512577] [2021-11-23 02:16:53,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159512577] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:53,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:53,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:53,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414548916] [2021-11-23 02:16:53,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:53,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:53,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:53,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:53,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:53,998 INFO L87 Difference]: Start difference. First operand 12671 states and 19606 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:16:55,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:16:55,725 INFO L93 Difference]: Finished difference Result 36580 states and 58299 transitions. [2021-11-23 02:16:55,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:16:55,725 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:16:55,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:16:55,793 INFO L225 Difference]: With dead ends: 36580 [2021-11-23 02:16:55,793 INFO L226 Difference]: Without dead ends: 24449 [2021-11-23 02:16:55,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:55,822 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 280 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:16:55,822 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 464 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:16:55,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24449 states. [2021-11-23 02:16:58,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24449 to 24335. [2021-11-23 02:16:58,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24335 states, 20531 states have (on average 1.506697189615703) internal successors, (30934), 20636 states have internal predecessors, (30934), 2696 states have call successors, (2696), 1097 states have call predecessors, (2696), 1106 states have return successors, (3992), 2603 states have call predecessors, (3992), 2695 states have call successors, (3992) [2021-11-23 02:16:58,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24335 states to 24335 states and 37622 transitions. [2021-11-23 02:16:58,151 INFO L78 Accepts]: Start accepts. Automaton has 24335 states and 37622 transitions. Word has length 156 [2021-11-23 02:16:58,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:16:58,152 INFO L470 AbstractCegarLoop]: Abstraction has 24335 states and 37622 transitions. [2021-11-23 02:16:58,152 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:16:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 24335 states and 37622 transitions. [2021-11-23 02:16:58,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:16:58,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:16:58,196 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:16:58,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-11-23 02:16:58,196 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:16:58,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:16:58,197 INFO L85 PathProgramCache]: Analyzing trace with hash -1052014768, now seen corresponding path program 1 times [2021-11-23 02:16:58,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:16:58,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066012780] [2021-11-23 02:16:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:16:58,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:16:58,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:16:58,262 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:16:58,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:16:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066012780] [2021-11-23 02:16:58,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066012780] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:16:58,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:16:58,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:16:58,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779306933] [2021-11-23 02:16:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:16:58,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:16:58,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:16:58,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:16:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:16:58,265 INFO L87 Difference]: Start difference. First operand 24335 states and 37622 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:17:01,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:01,794 INFO L93 Difference]: Finished difference Result 71220 states and 112875 transitions. [2021-11-23 02:17:01,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:01,795 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:17:01,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:01,937 INFO L225 Difference]: With dead ends: 71220 [2021-11-23 02:17:01,937 INFO L226 Difference]: Without dead ends: 47425 [2021-11-23 02:17:01,996 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:01,997 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 282 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:01,997 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 464 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:02,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47425 states. [2021-11-23 02:17:05,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47425 to 47199. [2021-11-23 02:17:05,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47199 states, 39923 states have (on average 1.501039501039501) internal successors, (59926), 40124 states have internal predecessors, (59926), 5144 states have call successors, (5144), 2121 states have call predecessors, (5144), 2130 states have return successors, (7592), 4955 states have call predecessors, (7592), 5143 states have call successors, (7592) [2021-11-23 02:17:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47199 states to 47199 states and 72662 transitions. [2021-11-23 02:17:06,038 INFO L78 Accepts]: Start accepts. Automaton has 47199 states and 72662 transitions. Word has length 156 [2021-11-23 02:17:06,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:06,039 INFO L470 AbstractCegarLoop]: Abstraction has 47199 states and 72662 transitions. [2021-11-23 02:17:06,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:17:06,039 INFO L276 IsEmpty]: Start isEmpty. Operand 47199 states and 72662 transitions. [2021-11-23 02:17:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:17:06,368 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:06,368 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:06,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-11-23 02:17:06,369 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:06,369 INFO L85 PathProgramCache]: Analyzing trace with hash 698892323, now seen corresponding path program 1 times [2021-11-23 02:17:06,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:06,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228032904] [2021-11-23 02:17:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:06,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:06,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:17:06,453 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:06,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228032904] [2021-11-23 02:17:06,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228032904] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:06,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:06,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:17:06,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769988140] [2021-11-23 02:17:06,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:06,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:06,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:06,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:06,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:06,456 INFO L87 Difference]: Start difference. First operand 47199 states and 72662 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:17:13,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:17:13,462 INFO L93 Difference]: Finished difference Result 139108 states and 218907 transitions. [2021-11-23 02:17:13,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 02:17:13,468 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) Word has length 156 [2021-11-23 02:17:13,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:17:13,795 INFO L225 Difference]: With dead ends: 139108 [2021-11-23 02:17:13,795 INFO L226 Difference]: Without dead ends: 92449 [2021-11-23 02:17:13,915 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:13,916 INFO L933 BasicCegarLoop]: 283 mSDtfsCounter, 284 mSDsluCounter, 215 mSDsCounter, 0 mSdLazyCounter, 94 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 284 SdHoareTripleChecker+Valid, 464 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 94 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 02:17:13,916 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [284 Valid, 464 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 94 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 02:17:14,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92449 states. [2021-11-23 02:17:20,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92449 to 91999. [2021-11-23 02:17:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91999 states, 77939 states have (on average 1.493142072646557) internal successors, (116374), 78332 states have internal predecessors, (116374), 9880 states have call successors, (9880), 4169 states have call predecessors, (9880), 4178 states have return successors, (14504), 9499 states have call predecessors, (14504), 9879 states have call successors, (14504) [2021-11-23 02:17:21,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91999 states to 91999 states and 140758 transitions. [2021-11-23 02:17:21,374 INFO L78 Accepts]: Start accepts. Automaton has 91999 states and 140758 transitions. Word has length 156 [2021-11-23 02:17:21,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:17:21,375 INFO L470 AbstractCegarLoop]: Abstraction has 91999 states and 140758 transitions. [2021-11-23 02:17:21,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9) [2021-11-23 02:17:21,375 INFO L276 IsEmpty]: Start isEmpty. Operand 91999 states and 140758 transitions. [2021-11-23 02:17:21,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-23 02:17:21,521 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:17:21,521 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:17:21,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-11-23 02:17:21,522 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, error1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:17:21,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:17:21,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1224779592, now seen corresponding path program 1 times [2021-11-23 02:17:21,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:17:21,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678336768] [2021-11-23 02:17:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:17:21,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:17:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:17:21,581 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-23 02:17:21,582 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:17:21,582 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678336768] [2021-11-23 02:17:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678336768] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:17:21,582 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:17:21,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-23 02:17:21,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720796986] [2021-11-23 02:17:21,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:17:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 02:17:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:17:21,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 02:17:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 02:17:21,584 INFO L87 Difference]: Start difference. First operand 91999 states and 140758 transitions. Second operand has 3 states, 3 states have (on average 24.666666666666668) internal successors, (74), 3 states have internal predecessors, (74), 3 states have call successors, (9), 1 states have call predecessors, (9), 1 states have return successors, (9), 3 states have call predecessors, (9), 3 states have call successors, (9)