./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/systemc/transmitter.04.cil.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 839c364b Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/systemc/transmitter.04.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7 --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 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 17:51:24,259 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 17:51:24,262 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 17:51:24,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 17:51:24,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 17:51:24,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 17:51:24,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 17:51:24,310 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 17:51:24,313 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 17:51:24,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 17:51:24,316 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 17:51:24,318 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 17:51:24,319 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 17:51:24,321 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 17:51:24,323 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 17:51:24,325 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 17:51:24,327 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 17:51:24,328 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 17:51:24,331 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 17:51:24,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 17:51:24,337 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 17:51:24,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 17:51:24,341 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 17:51:24,343 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 17:51:24,348 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 17:51:24,349 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 17:51:24,349 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 17:51:24,351 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 17:51:24,351 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 17:51:24,353 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 17:51:24,354 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 17:51:24,355 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 17:51:24,356 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 17:51:24,358 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 17:51:24,359 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 17:51:24,360 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 17:51:24,361 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 17:51:24,362 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 17:51:24,362 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 17:51:24,364 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 17:51:24,365 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 17:51:24,366 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 17:51:24,400 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 17:51:24,400 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 17:51:24,401 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 17:51:24,401 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 17:51:24,402 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 17:51:24,403 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 17:51:24,403 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 17:51:24,403 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 17:51:24,404 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 17:51:24,404 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 17:51:24,405 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 17:51:24,405 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 17:51:24,405 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 17:51:24,406 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 17:51:24,406 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 17:51:24,407 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 17:51:24,407 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 17:51:24,408 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 17:51:24,409 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 17:51:24,409 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 17:51:24,410 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 17:51:24,410 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 17:51:24,410 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 17:51:24,411 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 17:51:24,411 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 17:51:24,411 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 17:51:24,412 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 17:51:24,412 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 17:51:24,412 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 17:51:24,412 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 17:51:24,413 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 17:51:24,413 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 17:51:24,413 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:24,413 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 17:51:24,414 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 17:51:24,414 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 17:51:24,414 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 17:51:24,414 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 17:51:24,415 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 17:51:24,415 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 17:51:24,415 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 17:51:24,415 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_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1de07d37d630bd073064bf436fb9512b72ab982b0eaf3fcb1582f689c57482fa [2021-11-25 17:51:24,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 17:51:24,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 17:51:24,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 17:51:24,724 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 17:51:24,725 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 17:51:24,727 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-25 17:51:24,819 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/data/6493df60a/ecfa848b8ff64bdbb32c714a41f3a0f6/FLAGb4da226c6 [2021-11-25 17:51:25,370 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 17:51:25,371 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/sv-benchmarks/c/systemc/transmitter.04.cil.c [2021-11-25 17:51:25,382 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/data/6493df60a/ecfa848b8ff64bdbb32c714a41f3a0f6/FLAGb4da226c6 [2021-11-25 17:51:25,755 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/data/6493df60a/ecfa848b8ff64bdbb32c714a41f3a0f6 [2021-11-25 17:51:25,758 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 17:51:25,760 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 17:51:25,761 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:25,761 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 17:51:25,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 17:51:25,771 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:25" (1/1) ... [2021-11-25 17:51:25,772 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5eda0329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:25, skipping insertion in model container [2021-11-25 17:51:25,772 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 05:51:25" (1/1) ... [2021-11-25 17:51:25,777 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 17:51:25,821 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 17:51:25,983 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_602a795f-6a9a-46ad-8893-51f38ecbe72f/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-25 17:51:26,061 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:26,070 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 17:51:26,082 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_602a795f-6a9a-46ad-8893-51f38ecbe72f/sv-benchmarks/c/systemc/transmitter.04.cil.c[706,719] [2021-11-25 17:51:26,118 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 17:51:26,135 INFO L208 MainTranslator]: Completed translation [2021-11-25 17:51:26,136 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26 WrapperNode [2021-11-25 17:51:26,136 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 17:51:26,137 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:26,137 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 17:51:26,137 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 17:51:26,145 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,155 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,187 INFO L137 Inliner]: procedures = 36, calls = 42, calls flagged for inlining = 20, calls inlined = 20, statements flattened = 378 [2021-11-25 17:51:26,187 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 17:51:26,188 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 17:51:26,188 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 17:51:26,188 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 17:51:26,201 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,202 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,213 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,216 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,224 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,236 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,241 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 17:51:26,242 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 17:51:26,242 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 17:51:26,242 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 17:51:26,247 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (1/1) ... [2021-11-25 17:51:26,254 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 17:51:26,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:26,279 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 17:51:26,290 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 17:51:26,340 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 17:51:26,342 INFO L130 BoogieDeclarations]: Found specification of procedure fire_delta_events [2021-11-25 17:51:26,343 INFO L138 BoogieDeclarations]: Found implementation of procedure fire_delta_events [2021-11-25 17:51:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure activate_threads [2021-11-25 17:51:26,343 INFO L138 BoogieDeclarations]: Found implementation of procedure activate_threads [2021-11-25 17:51:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify [2021-11-25 17:51:26,343 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify [2021-11-25 17:51:26,343 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2021-11-25 17:51:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2021-11-25 17:51:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure reset_delta_events [2021-11-25 17:51:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure reset_delta_events [2021-11-25 17:51:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 17:51:26,344 INFO L130 BoogieDeclarations]: Found specification of procedure update_channels [2021-11-25 17:51:26,344 INFO L138 BoogieDeclarations]: Found implementation of procedure update_channels [2021-11-25 17:51:26,345 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 17:51:26,345 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 17:51:26,416 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 17:51:26,417 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 17:51:26,924 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 17:51:27,138 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 17:51:27,139 INFO L301 CfgBuilder]: Removed 8 assume(true) statements. [2021-11-25 17:51:27,142 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:27 BoogieIcfgContainer [2021-11-25 17:51:27,142 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 17:51:27,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 17:51:27,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 17:51:27,150 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 17:51:27,150 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 05:51:25" (1/3) ... [2021-11-25 17:51:27,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25097b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:27, skipping insertion in model container [2021-11-25 17:51:27,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 05:51:26" (2/3) ... [2021-11-25 17:51:27,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25097b08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 05:51:27, skipping insertion in model container [2021-11-25 17:51:27,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 05:51:27" (3/3) ... [2021-11-25 17:51:27,154 INFO L111 eAbstractionObserver]: Analyzing ICFG transmitter.04.cil.c [2021-11-25 17:51:27,165 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 17:51:27,165 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 17:51:27,210 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 17:51:27,217 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 [2021-11-25 17:51:27,217 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 17:51:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) [2021-11-25 17:51:27,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 17:51:27,245 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:27,246 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] [2021-11-25 17:51:27,246 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:27,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:27,252 INFO L85 PathProgramCache]: Analyzing trace with hash -2018350875, now seen corresponding path program 1 times [2021-11-25 17:51:27,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:27,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510623619] [2021-11-25 17:51:27,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:27,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:27,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:27,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:27,559 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:27,559 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510623619] [2021-11-25 17:51:27,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510623619] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:27,560 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:27,561 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:51:27,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336048927] [2021-11-25 17:51:27,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:27,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:51:27,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:27,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:51:27,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:51:27,609 INFO L87 Difference]: Start difference. First operand has 98 states, 73 states have (on average 1.5205479452054795) internal successors, (111), 75 states have internal predecessors, (111), 17 states have call successors, (17), 6 states have call predecessors, (17), 6 states have return successors, (17), 17 states have call predecessors, (17), 17 states have call successors, (17) Second operand has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-11-25 17:51:27,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:27,896 INFO L93 Difference]: Finished difference Result 281 states and 422 transitions. [2021-11-25 17:51:27,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:51:27,898 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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 45 [2021-11-25 17:51:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:27,910 INFO L225 Difference]: With dead ends: 281 [2021-11-25 17:51:27,910 INFO L226 Difference]: Without dead ends: 184 [2021-11-25 17:51:27,915 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 [2021-11-25 17:51:27,919 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 243 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:27,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 354 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:51:27,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-25 17:51:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2021-11-25 17:51:27,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 137 states have (on average 1.437956204379562) internal successors, (197), 139 states have internal predecessors, (197), 30 states have call successors, (30), 12 states have call predecessors, (30), 12 states have return successors, (30), 29 states have call predecessors, (30), 30 states have call successors, (30) [2021-11-25 17:51:27,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 257 transitions. [2021-11-25 17:51:27,987 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 257 transitions. Word has length 45 [2021-11-25 17:51:27,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:27,988 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 257 transitions. [2021-11-25 17:51:27,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.75) internal successors, (35), 4 states have internal predecessors, (35), 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) [2021-11-25 17:51:27,989 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 257 transitions. [2021-11-25 17:51:27,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 17:51:27,992 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:27,992 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] [2021-11-25 17:51:27,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 17:51:27,993 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:27,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:27,994 INFO L85 PathProgramCache]: Analyzing trace with hash -966901786, now seen corresponding path program 1 times [2021-11-25 17:51:27,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:27,995 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725189747] [2021-11-25 17:51:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:27,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:28,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:28,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:28,181 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:28,182 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725189747] [2021-11-25 17:51:28,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725189747] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:28,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:28,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:51:28,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285769912] [2021-11-25 17:51:28,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:28,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:28,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:28,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:28,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:28,187 INFO L87 Difference]: Start difference. First operand 180 states and 257 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-11-25 17:51:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:28,760 INFO L93 Difference]: Finished difference Result 1021 states and 1523 transitions. [2021-11-25 17:51:28,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:28,764 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2021-11-25 17:51:28,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:28,784 INFO L225 Difference]: With dead ends: 1021 [2021-11-25 17:51:28,784 INFO L226 Difference]: Without dead ends: 846 [2021-11-25 17:51:28,795 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 [2021-11-25 17:51:28,798 INFO L933 BasicCegarLoop]: 276 mSDtfsCounter, 519 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 337 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:28,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 575 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 337 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:28,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2021-11-25 17:51:28,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 810. [2021-11-25 17:51:28,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 627 states have (on average 1.4242424242424243) internal successors, (893), 635 states have internal predecessors, (893), 122 states have call successors, (122), 60 states have call predecessors, (122), 60 states have return successors, (172), 115 states have call predecessors, (172), 122 states have call successors, (172) [2021-11-25 17:51:28,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 1187 transitions. [2021-11-25 17:51:28,982 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 1187 transitions. Word has length 45 [2021-11-25 17:51:28,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:28,984 INFO L470 AbstractCegarLoop]: Abstraction has 810 states and 1187 transitions. [2021-11-25 17:51:28,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-11-25 17:51:28,985 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 1187 transitions. [2021-11-25 17:51:28,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 17:51:28,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:28,992 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] [2021-11-25 17:51:28,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 17:51:28,997 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:28,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:28,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1938576473, now seen corresponding path program 1 times [2021-11-25 17:51:28,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:28,999 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777435001] [2021-11-25 17:51:28,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:28,999 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:29,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:29,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:29,131 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:29,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777435001] [2021-11-25 17:51:29,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777435001] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:29,132 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:29,132 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-25 17:51:29,132 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471697767] [2021-11-25 17:51:29,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:29,133 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-25 17:51:29,133 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:29,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-25 17:51:29,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-25 17:51:29,135 INFO L87 Difference]: Start difference. First operand 810 states and 1187 transitions. Second operand has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-11-25 17:51:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:29,701 INFO L93 Difference]: Finished difference Result 3163 states and 4753 transitions. [2021-11-25 17:51:29,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-25 17:51:29,702 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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 45 [2021-11-25 17:51:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:29,723 INFO L225 Difference]: With dead ends: 3163 [2021-11-25 17:51:29,723 INFO L226 Difference]: Without dead ends: 2358 [2021-11-25 17:51:29,728 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 [2021-11-25 17:51:29,737 INFO L933 BasicCegarLoop]: 295 mSDtfsCounter, 509 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 352 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 515 SdHoareTripleChecker+Valid, 589 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:29,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [515 Valid, 589 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 352 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 17:51:29,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2358 states. [2021-11-25 17:51:29,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2358 to 2128. [2021-11-25 17:51:29,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2128 states, 1675 states have (on average 1.4382089552238806) internal successors, (2409), 1681 states have internal predecessors, (2409), 288 states have call successors, (288), 148 states have call predecessors, (288), 164 states have return successors, (494), 299 states have call predecessors, (494), 288 states have call successors, (494) [2021-11-25 17:51:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2128 states to 2128 states and 3191 transitions. [2021-11-25 17:51:29,946 INFO L78 Accepts]: Start accepts. Automaton has 2128 states and 3191 transitions. Word has length 45 [2021-11-25 17:51:29,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:29,946 INFO L470 AbstractCegarLoop]: Abstraction has 2128 states and 3191 transitions. [2021-11-25 17:51:29,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.0) internal successors, (35), 5 states have internal predecessors, (35), 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) [2021-11-25 17:51:29,947 INFO L276 IsEmpty]: Start isEmpty. Operand 2128 states and 3191 transitions. [2021-11-25 17:51:29,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-25 17:51:29,952 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:29,952 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] [2021-11-25 17:51:29,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 17:51:29,953 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:29,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1299791994, now seen corresponding path program 1 times [2021-11-25 17:51:29,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:29,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623439430] [2021-11-25 17:51:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:29,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:30,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:30,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:30,107 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:30,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623439430] [2021-11-25 17:51:30,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623439430] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:30,109 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:30,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:30,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274283605] [2021-11-25 17:51:30,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:30,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:51:30,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:51:30,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:30,112 INFO L87 Difference]: Start difference. First operand 2128 states and 3191 transitions. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:30,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:30,613 INFO L93 Difference]: Finished difference Result 5982 states and 8997 transitions. [2021-11-25 17:51:30,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:51:30,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 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 45 [2021-11-25 17:51:30,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:30,645 INFO L225 Difference]: With dead ends: 5982 [2021-11-25 17:51:30,645 INFO L226 Difference]: Without dead ends: 3860 [2021-11-25 17:51:30,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:51:30,655 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 431 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 165 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 438 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:30,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [438 Valid, 315 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 165 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:51:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-11-25 17:51:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3384. [2021-11-25 17:51:30,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3384 states, 2687 states have (on average 1.4194268701153703) internal successors, (3814), 2696 states have internal predecessors, (3814), 426 states have call successors, (426), 240 states have call predecessors, (426), 270 states have return successors, (725), 448 states have call predecessors, (725), 426 states have call successors, (725) [2021-11-25 17:51:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3384 states to 3384 states and 4965 transitions. [2021-11-25 17:51:30,960 INFO L78 Accepts]: Start accepts. Automaton has 3384 states and 4965 transitions. Word has length 45 [2021-11-25 17:51:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:30,961 INFO L470 AbstractCegarLoop]: Abstraction has 3384 states and 4965 transitions. [2021-11-25 17:51:30,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:30,961 INFO L276 IsEmpty]: Start isEmpty. Operand 3384 states and 4965 transitions. [2021-11-25 17:51:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-25 17:51:30,962 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:30,962 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] [2021-11-25 17:51:30,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 17:51:30,963 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:30,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:30,964 INFO L85 PathProgramCache]: Analyzing trace with hash 602838576, now seen corresponding path program 1 times [2021-11-25 17:51:30,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:30,964 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905080465] [2021-11-25 17:51:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:30,965 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:30,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:31,039 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:31,040 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905080465] [2021-11-25 17:51:31,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905080465] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:31,040 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:31,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:31,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001730621] [2021-11-25 17:51:31,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:31,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:51:31,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:31,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:51:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:31,043 INFO L87 Difference]: Start difference. First operand 3384 states and 4965 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:31,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:31,775 INFO L93 Difference]: Finished difference Result 10166 states and 14972 transitions. [2021-11-25 17:51:31,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:51:31,776 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 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 46 [2021-11-25 17:51:31,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:31,847 INFO L225 Difference]: With dead ends: 10166 [2021-11-25 17:51:31,847 INFO L226 Difference]: Without dead ends: 6788 [2021-11-25 17:51:31,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:51:31,867 INFO L933 BasicCegarLoop]: 128 mSDtfsCounter, 388 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:31,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 315 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:51:31,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6788 states. [2021-11-25 17:51:32,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6788 to 6046. [2021-11-25 17:51:32,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6046 states, 4815 states have (on average 1.412461059190031) internal successors, (6801), 4828 states have internal predecessors, (6801), 740 states have call successors, (740), 420 states have call predecessors, (740), 490 states have return successors, (1318), 798 states have call predecessors, (1318), 740 states have call successors, (1318) [2021-11-25 17:51:32,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6046 states to 6046 states and 8859 transitions. [2021-11-25 17:51:32,493 INFO L78 Accepts]: Start accepts. Automaton has 6046 states and 8859 transitions. Word has length 46 [2021-11-25 17:51:32,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:32,494 INFO L470 AbstractCegarLoop]: Abstraction has 6046 states and 8859 transitions. [2021-11-25 17:51:32,495 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 6 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:32,495 INFO L276 IsEmpty]: Start isEmpty. Operand 6046 states and 8859 transitions. [2021-11-25 17:51:32,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-25 17:51:32,496 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:32,497 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] [2021-11-25 17:51:32,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-25 17:51:32,497 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:32,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1616814173, now seen corresponding path program 1 times [2021-11-25 17:51:32,499 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:32,499 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8142810] [2021-11-25 17:51:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:32,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:32,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:32,602 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:32,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8142810] [2021-11-25 17:51:32,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8142810] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:32,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:32,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:32,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770496032] [2021-11-25 17:51:32,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:32,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:51:32,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:32,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:51:32,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:32,607 INFO L87 Difference]: Start difference. First operand 6046 states and 8859 transitions. Second operand has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:33,745 INFO L93 Difference]: Finished difference Result 16750 states and 24959 transitions. [2021-11-25 17:51:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:51:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 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 47 [2021-11-25 17:51:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:33,908 INFO L225 Difference]: With dead ends: 16750 [2021-11-25 17:51:33,908 INFO L226 Difference]: Without dead ends: 10710 [2021-11-25 17:51:33,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:51:33,941 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 357 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 364 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:33,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [364 Valid, 328 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:33,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10710 states. [2021-11-25 17:51:34,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10710 to 9576. [2021-11-25 17:51:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9576 states, 7605 states have (on average 1.3982905982905982) internal successors, (10634), 7634 states have internal predecessors, (10634), 1188 states have call successors, (1188), 696 states have call predecessors, (1188), 782 states have return successors, (2091), 1246 states have call predecessors, (2091), 1188 states have call successors, (2091) [2021-11-25 17:51:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9576 states to 9576 states and 13913 transitions. [2021-11-25 17:51:34,905 INFO L78 Accepts]: Start accepts. Automaton has 9576 states and 13913 transitions. Word has length 47 [2021-11-25 17:51:34,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:34,906 INFO L470 AbstractCegarLoop]: Abstraction has 9576 states and 13913 transitions. [2021-11-25 17:51:34,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.166666666666667) internal successors, (37), 6 states have internal predecessors, (37), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:34,908 INFO L276 IsEmpty]: Start isEmpty. Operand 9576 states and 13913 transitions. [2021-11-25 17:51:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-25 17:51:34,910 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:34,910 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] [2021-11-25 17:51:34,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 17:51:34,911 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:34,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:34,912 INFO L85 PathProgramCache]: Analyzing trace with hash -326246836, now seen corresponding path program 1 times [2021-11-25 17:51:34,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:34,912 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070512236] [2021-11-25 17:51:34,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:34,913 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:34,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:35,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:35,053 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:35,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070512236] [2021-11-25 17:51:35,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070512236] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:35,054 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:35,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-11-25 17:51:35,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136216345] [2021-11-25 17:51:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:35,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 17:51:35,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:35,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 17:51:35,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:35,057 INFO L87 Difference]: Start difference. First operand 9576 states and 13913 transitions. Second operand has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:36,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:36,732 INFO L93 Difference]: Finished difference Result 26222 states and 38781 transitions. [2021-11-25 17:51:36,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-25 17:51:36,733 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 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 48 [2021-11-25 17:51:36,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:36,862 INFO L225 Difference]: With dead ends: 26222 [2021-11-25 17:51:36,863 INFO L226 Difference]: Without dead ends: 16652 [2021-11-25 17:51:36,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:51:36,918 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 358 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 213 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:36,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 342 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 213 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:36,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16652 states. [2021-11-25 17:51:38,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16652 to 15498. [2021-11-25 17:51:38,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15498 states, 12290 states have (on average 1.3807160292921075) internal successors, (16969), 12345 states have internal predecessors, (16969), 1933 states have call successors, (1933), 1166 states have call predecessors, (1933), 1274 states have return successors, (3359), 1987 states have call predecessors, (3359), 1933 states have call successors, (3359) [2021-11-25 17:51:38,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15498 states to 15498 states and 22261 transitions. [2021-11-25 17:51:38,490 INFO L78 Accepts]: Start accepts. Automaton has 15498 states and 22261 transitions. Word has length 48 [2021-11-25 17:51:38,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:38,491 INFO L470 AbstractCegarLoop]: Abstraction has 15498 states and 22261 transitions. [2021-11-25 17:51:38,491 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.333333333333333) internal successors, (38), 6 states have internal predecessors, (38), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2021-11-25 17:51:38,492 INFO L276 IsEmpty]: Start isEmpty. Operand 15498 states and 22261 transitions. [2021-11-25 17:51:38,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-25 17:51:38,493 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:38,493 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] [2021-11-25 17:51:38,494 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 17:51:38,494 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:38,496 INFO L85 PathProgramCache]: Analyzing trace with hash -1092608959, now seen corresponding path program 1 times [2021-11-25 17:51:38,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:38,497 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224654385] [2021-11-25 17:51:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:38,497 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:38,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:38,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:38,569 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:38,570 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224654385] [2021-11-25 17:51:38,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224654385] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:38,570 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:38,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:38,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158083850] [2021-11-25 17:51:38,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:38,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:38,577 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:38,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:38,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:38,578 INFO L87 Difference]: Start difference. First operand 15498 states and 22261 transitions. Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:51:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:40,483 INFO L93 Difference]: Finished difference Result 45968 states and 67924 transitions. [2021-11-25 17:51:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:40,483 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2021-11-25 17:51:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:40,667 INFO L225 Difference]: With dead ends: 45968 [2021-11-25 17:51:40,667 INFO L226 Difference]: Without dead ends: 30475 [2021-11-25 17:51:40,735 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 [2021-11-25 17:51:40,736 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 109 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:40,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 226 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30475 states. [2021-11-25 17:51:42,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30475 to 30238. [2021-11-25 17:51:42,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30238 states, 23827 states have (on average 1.3496873295001468) internal successors, (32159), 23936 states have internal predecessors, (32159), 3862 states have call successors, (3862), 2332 states have call predecessors, (3862), 2548 states have return successors, (6714), 3970 states have call predecessors, (6714), 3862 states have call successors, (6714) [2021-11-25 17:51:43,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30238 states to 30238 states and 42735 transitions. [2021-11-25 17:51:43,154 INFO L78 Accepts]: Start accepts. Automaton has 30238 states and 42735 transitions. Word has length 49 [2021-11-25 17:51:43,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:43,155 INFO L470 AbstractCegarLoop]: Abstraction has 30238 states and 42735 transitions. [2021-11-25 17:51:43,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 3 states have internal predecessors, (39), 1 states have call successors, (5), 1 states have call predecessors, (5), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2021-11-25 17:51:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 30238 states and 42735 transitions. [2021-11-25 17:51:43,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-25 17:51:43,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:43,167 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:43,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 17:51:43,167 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:43,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:43,168 INFO L85 PathProgramCache]: Analyzing trace with hash 98197573, now seen corresponding path program 1 times [2021-11-25 17:51:43,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:43,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002210554] [2021-11-25 17:51:43,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:43,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:43,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:43,265 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-25 17:51:43,268 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:43,269 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002210554] [2021-11-25 17:51:43,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002210554] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:43,269 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:43,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:43,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836834553] [2021-11-25 17:51:43,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:43,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:43,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:43,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:43,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:43,273 INFO L87 Difference]: Start difference. First operand 30238 states and 42735 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 17:51:45,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:45,636 INFO L93 Difference]: Finished difference Result 56778 states and 81509 transitions. [2021-11-25 17:51:45,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:45,637 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 67 [2021-11-25 17:51:45,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:45,908 INFO L225 Difference]: With dead ends: 56778 [2021-11-25 17:51:45,908 INFO L226 Difference]: Without dead ends: 41286 [2021-11-25 17:51:45,983 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 [2021-11-25 17:51:45,984 INFO L933 BasicCegarLoop]: 192 mSDtfsCounter, 78 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 309 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:45,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 309 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:46,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-11-25 17:51:48,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 34462. [2021-11-25 17:51:48,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34462 states, 27577 states have (on average 1.3667911665518366) internal successors, (37692), 27686 states have internal predecessors, (37692), 4099 states have call successors, (4099), 2569 states have call predecessors, (4099), 2785 states have return successors, (6951), 4207 states have call predecessors, (6951), 4099 states have call successors, (6951) [2021-11-25 17:51:48,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34462 states to 34462 states and 48742 transitions. [2021-11-25 17:51:48,347 INFO L78 Accepts]: Start accepts. Automaton has 34462 states and 48742 transitions. Word has length 67 [2021-11-25 17:51:48,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:48,348 INFO L470 AbstractCegarLoop]: Abstraction has 34462 states and 48742 transitions. [2021-11-25 17:51:48,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-25 17:51:48,348 INFO L276 IsEmpty]: Start isEmpty. Operand 34462 states and 48742 transitions. [2021-11-25 17:51:48,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:51:48,403 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:48,403 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:48,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 17:51:48,404 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:48,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:48,404 INFO L85 PathProgramCache]: Analyzing trace with hash -65364597, now seen corresponding path program 1 times [2021-11-25 17:51:48,404 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:48,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660725561] [2021-11-25 17:51:48,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:48,405 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:48,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2021-11-25 17:51:48,496 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:48,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660725561] [2021-11-25 17:51:48,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660725561] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:48,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575577865] [2021-11-25 17:51:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:48,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:48,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:48,502 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:48,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 17:51:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:51:48,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 17:51:48,956 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:48,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575577865] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:48,957 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:51:48,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2021-11-25 17:51:48,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026299579] [2021-11-25 17:51:48,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:48,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:48,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:48,959 INFO L87 Difference]: Start difference. First operand 34462 states and 48742 transitions. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 17:51:51,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:51,408 INFO L93 Difference]: Finished difference Result 64573 states and 91591 transitions. [2021-11-25 17:51:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) Word has length 95 [2021-11-25 17:51:51,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:51,603 INFO L225 Difference]: With dead ends: 64573 [2021-11-25 17:51:51,604 INFO L226 Difference]: Without dead ends: 41145 [2021-11-25 17:51:51,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:51,668 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 72 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 225 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:51,670 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 225 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-25 17:51:51,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41145 states. [2021-11-25 17:51:53,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41145 to 37010. [2021-11-25 17:51:53,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37010 states, 29361 states have (on average 1.34266544055039) internal successors, (39422), 29502 states have internal predecessors, (39422), 4615 states have call successors, (4615), 2905 states have call predecessors, (4615), 3033 states have return successors, (6993), 4603 states have call predecessors, (6993), 4615 states have call successors, (6993) [2021-11-25 17:51:53,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37010 states to 37010 states and 51030 transitions. [2021-11-25 17:51:53,795 INFO L78 Accepts]: Start accepts. Automaton has 37010 states and 51030 transitions. Word has length 95 [2021-11-25 17:51:53,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:53,797 INFO L470 AbstractCegarLoop]: Abstraction has 37010 states and 51030 transitions. [2021-11-25 17:51:53,797 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 2 states have internal predecessors, (62), 1 states have call successors, (7), 1 states have call predecessors, (7), 2 states have return successors, (7), 2 states have call predecessors, (7), 1 states have call successors, (7) [2021-11-25 17:51:53,798 INFO L276 IsEmpty]: Start isEmpty. Operand 37010 states and 51030 transitions. [2021-11-25 17:51:53,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-11-25 17:51:53,837 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:53,837 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:53,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:54,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:54,051 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:54,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:54,051 INFO L85 PathProgramCache]: Analyzing trace with hash 925800076, now seen corresponding path program 1 times [2021-11-25 17:51:54,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:54,051 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940262627] [2021-11-25 17:51:54,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:54,052 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:54,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-25 17:51:54,121 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940262627] [2021-11-25 17:51:54,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940262627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 17:51:54,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816805853] [2021-11-25 17:51:54,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:54,122 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 17:51:54,123 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 17:51:54,124 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 17:51:54,146 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 17:51:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:54,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 492 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 17:51:54,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 17:51:54,427 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 17:51:54,428 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 17:51:54,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816805853] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:54,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 17:51:54,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2021-11-25 17:51:54,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363269739] [2021-11-25 17:51:54,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:54,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:54,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:54,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:54,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:54,431 INFO L87 Difference]: Start difference. First operand 37010 states and 51030 transitions. Second operand has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 17:51:56,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:51:56,712 INFO L93 Difference]: Finished difference Result 75874 states and 105042 transitions. [2021-11-25 17:51:56,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:51:56,713 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) Word has length 95 [2021-11-25 17:51:56,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:51:56,874 INFO L225 Difference]: With dead ends: 75874 [2021-11-25 17:51:56,874 INFO L226 Difference]: Without dead ends: 44514 [2021-11-25 17:51:56,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-11-25 17:51:56,952 INFO L933 BasicCegarLoop]: 188 mSDtfsCounter, 69 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 304 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:51:56,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 304 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:51:57,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44514 states. [2021-11-25 17:51:59,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44514 to 40142. [2021-11-25 17:51:59,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40142 states, 32151 states have (on average 1.3516531367609095) internal successors, (43457), 32292 states have internal predecessors, (43457), 4786 states have call successors, (4786), 3076 states have call predecessors, (4786), 3204 states have return successors, (7164), 4774 states have call predecessors, (7164), 4786 states have call successors, (7164) [2021-11-25 17:51:59,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40142 states to 40142 states and 55407 transitions. [2021-11-25 17:51:59,337 INFO L78 Accepts]: Start accepts. Automaton has 40142 states and 55407 transitions. Word has length 95 [2021-11-25 17:51:59,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:51:59,338 INFO L470 AbstractCegarLoop]: Abstraction has 40142 states and 55407 transitions. [2021-11-25 17:51:59,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 3 states have call successors, (8), 3 states have call predecessors, (8), 3 states have return successors, (8), 3 states have call predecessors, (8), 3 states have call successors, (8) [2021-11-25 17:51:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand 40142 states and 55407 transitions. [2021-11-25 17:51:59,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 17:51:59,397 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:51:59,397 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:51:59,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 17:51:59,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_602a795f-6a9a-46ad-8893-51f38ecbe72f/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 17:51:59,623 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:51:59,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:51:59,623 INFO L85 PathProgramCache]: Analyzing trace with hash 1133294107, now seen corresponding path program 1 times [2021-11-25 17:51:59,624 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:51:59,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772816572] [2021-11-25 17:51:59,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:51:59,624 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:51:59,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:51:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-25 17:51:59,702 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:51:59,702 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772816572] [2021-11-25 17:51:59,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [772816572] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:51:59,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:51:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 17:51:59,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072854498] [2021-11-25 17:51:59,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:51:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 17:51:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:51:59,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 17:51:59,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 17:51:59,705 INFO L87 Difference]: Start difference. First operand 40142 states and 55407 transitions. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 17:52:02,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:02,065 INFO L93 Difference]: Finished difference Result 83613 states and 115746 transitions. [2021-11-25 17:52:02,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 17:52:02,066 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) Word has length 93 [2021-11-25 17:52:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:02,236 INFO L225 Difference]: With dead ends: 83613 [2021-11-25 17:52:02,237 INFO L226 Difference]: Without dead ends: 48144 [2021-11-25 17:52:02,359 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 [2021-11-25 17:52:02,360 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 100 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:02,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 231 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 17:52:02,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48144 states. [2021-11-25 17:52:04,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48144 to 30534. [2021-11-25 17:52:04,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30534 states, 24355 states have (on average 1.3402997331143502) internal successors, (32643), 24466 states have internal predecessors, (32643), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-25 17:52:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30534 states to 30534 states and 41543 transitions. [2021-11-25 17:52:04,456 INFO L78 Accepts]: Start accepts. Automaton has 30534 states and 41543 transitions. Word has length 93 [2021-11-25 17:52:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:04,457 INFO L470 AbstractCegarLoop]: Abstraction has 30534 states and 41543 transitions. [2021-11-25 17:52:04,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 3 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (7), 3 states have call predecessors, (7), 3 states have call successors, (7) [2021-11-25 17:52:04,457 INFO L276 IsEmpty]: Start isEmpty. Operand 30534 states and 41543 transitions. [2021-11-25 17:52:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 17:52:04,485 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:04,486 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:04,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-11-25 17:52:04,486 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:04,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:04,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2049687812, now seen corresponding path program 1 times [2021-11-25 17:52:04,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:04,487 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115178637] [2021-11-25 17:52:04,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:04,488 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:04,704 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 18 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-25 17:52:04,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:04,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115178637] [2021-11-25 17:52:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115178637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:04,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:04,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 17:52:04,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350087001] [2021-11-25 17:52:04,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 17:52:04,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 17:52:04,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-25 17:52:04,706 INFO L87 Difference]: Start difference. First operand 30534 states and 41543 transitions. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:52:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:06,307 INFO L93 Difference]: Finished difference Result 47973 states and 67075 transitions. [2021-11-25 17:52:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 17:52:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) Word has length 93 [2021-11-25 17:52:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:06,413 INFO L225 Difference]: With dead ends: 47973 [2021-11-25 17:52:06,413 INFO L226 Difference]: Without dead ends: 30534 [2021-11-25 17:52:06,458 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 [2021-11-25 17:52:06,459 INFO L933 BasicCegarLoop]: 207 mSDtfsCounter, 240 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 156 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 156 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:06,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 354 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 156 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 17:52:06,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30534 states. [2021-11-25 17:52:08,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30534 to 30116. [2021-11-25 17:52:08,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30116 states, 23937 states have (on average 1.3195053682583449) internal successors, (31585), 24048 states have internal predecessors, (31585), 3738 states have call successors, (3738), 2400 states have call predecessors, (3738), 2440 states have return successors, (5162), 3668 states have call predecessors, (5162), 3738 states have call successors, (5162) [2021-11-25 17:52:08,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30116 states to 30116 states and 40485 transitions. [2021-11-25 17:52:08,351 INFO L78 Accepts]: Start accepts. Automaton has 30116 states and 40485 transitions. Word has length 93 [2021-11-25 17:52:08,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 17:52:08,351 INFO L470 AbstractCegarLoop]: Abstraction has 30116 states and 40485 transitions. [2021-11-25 17:52:08,351 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 2 states have call successors, (8), 1 states have call predecessors, (8), 2 states have return successors, (8), 4 states have call predecessors, (8), 2 states have call successors, (8) [2021-11-25 17:52:08,351 INFO L276 IsEmpty]: Start isEmpty. Operand 30116 states and 40485 transitions. [2021-11-25 17:52:08,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-11-25 17:52:08,374 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 17:52:08,375 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 17:52:08,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-11-25 17:52:08,375 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 17:52:08,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 17:52:08,376 INFO L85 PathProgramCache]: Analyzing trace with hash 1388354021, now seen corresponding path program 1 times [2021-11-25 17:52:08,376 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 17:52:08,376 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821186421] [2021-11-25 17:52:08,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 17:52:08,376 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 17:52:08,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 17:52:08,564 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-25 17:52:08,565 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 17:52:08,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821186421] [2021-11-25 17:52:08,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821186421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 17:52:08,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 17:52:08,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-11-25 17:52:08,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457621979] [2021-11-25 17:52:08,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 17:52:08,568 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-25 17:52:08,568 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 17:52:08,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-25 17:52:08,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-11-25 17:52:08,569 INFO L87 Difference]: Start difference. First operand 30116 states and 40485 transitions. Second operand has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) [2021-11-25 17:52:13,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 17:52:13,647 INFO L93 Difference]: Finished difference Result 102197 states and 142679 transitions. [2021-11-25 17:52:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-25 17:52:13,647 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 7 states have (on average 8.428571428571429) internal successors, (59), 8 states have internal predecessors, (59), 5 states have call successors, (7), 3 states have call predecessors, (7), 4 states have return successors, (7), 6 states have call predecessors, (7), 5 states have call successors, (7) Word has length 93 [2021-11-25 17:52:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 17:52:13,843 INFO L225 Difference]: With dead ends: 102197 [2021-11-25 17:52:13,843 INFO L226 Difference]: Without dead ends: 76813 [2021-11-25 17:52:13,901 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-11-25 17:52:13,902 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 835 mSDsluCounter, 416 mSDsCounter, 0 mSdLazyCounter, 691 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 851 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2021-11-25 17:52:13,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [851 Valid, 465 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 691 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2021-11-25 17:52:13,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76813 states.