./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.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_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/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_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/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_ef5aa6ab-680f-4044-84ca-8649a17a3961/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 a8373cb8fe582bc9cb45d9609c89b33bf31b030c114c7e7fdfee851d52974fb9 --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:34:25,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:34:25,331 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:34:25,364 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:34:25,365 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:34:25,366 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:34:25,368 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:34:25,370 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:34:25,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:34:25,373 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:34:25,374 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:34:25,375 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:34:25,376 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:34:25,377 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:34:25,379 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:34:25,380 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:34:25,381 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:34:25,382 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:34:25,384 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:34:25,387 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:34:25,388 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:34:25,390 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:34:25,391 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:34:25,392 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:34:25,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:34:25,396 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:34:25,397 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:34:25,398 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:34:25,398 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:34:25,399 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:34:25,400 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:34:25,401 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:34:25,402 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:34:25,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:34:25,404 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:34:25,404 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:34:25,405 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:34:25,405 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:34:25,406 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:34:25,407 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:34:25,408 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:34:25,409 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:34:25,437 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:34:25,438 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:34:25,438 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:34:25,438 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:34:25,439 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:34:25,439 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:34:25,439 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:34:25,440 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:34:25,440 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:34:25,440 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:34:25,440 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:34:25,440 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:34:25,440 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:34:25,441 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:34:25,441 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:34:25,441 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:34:25,441 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:34:25,441 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:34:25,442 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:34:25,442 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:34:25,442 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:34:25,443 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:34:25,443 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:34:25,443 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:34:25,443 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:34:25,443 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:34:25,444 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:34:25,444 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:34:25,444 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:34:25,444 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:34:25,444 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:34:25,445 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:34:25,445 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:25,445 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:34:25,445 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:34:25,446 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:34:25,447 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_ef5aa6ab-680f-4044-84ca-8649a17a3961/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8373cb8fe582bc9cb45d9609c89b33bf31b030c114c7e7fdfee851d52974fb9 [2021-11-25 20:34:25,695 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:34:25,722 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:34:25,725 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:34:25,726 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:34:25,726 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:34:25,728 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.cil.c [2021-11-25 20:34:25,808 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/data/6c99198db/401af7cbd8364aaa90c79effef937abc/FLAGf2266cb05 [2021-11-25 20:34:26,333 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:34:26,334 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.cil.c [2021-11-25 20:34:26,344 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/data/6c99198db/401af7cbd8364aaa90c79effef937abc/FLAGf2266cb05 [2021-11-25 20:34:26,787 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/data/6c99198db/401af7cbd8364aaa90c79effef937abc [2021-11-25 20:34:26,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:34:26,791 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:34:26,792 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:26,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:34:26,810 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:34:26,811 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:26" (1/1) ... [2021-11-25 20:34:26,812 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50e83ece and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:26, skipping insertion in model container [2021-11-25 20:34:26,812 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:34:26" (1/1) ... [2021-11-25 20:34:26,819 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:34:26,856 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:34:27,083 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_ef5aa6ab-680f-4044-84ca-8649a17a3961/sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.cil.c[44494,44507] [2021-11-25 20:34:27,090 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:27,098 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:34:27,171 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_ef5aa6ab-680f-4044-84ca-8649a17a3961/sv-benchmarks/c/bitvector/s3_srvr_3a.BV.c.cil.c[44494,44507] [2021-11-25 20:34:27,174 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:34:27,200 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:34:27,201 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27 WrapperNode [2021-11-25 20:34:27,201 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:34:27,202 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:27,202 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:34:27,202 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:34:27,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,219 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,265 INFO L137 Inliner]: procedures = 15, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 519 [2021-11-25 20:34:27,268 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:34:27,269 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:34:27,269 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:34:27,269 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:34:27,279 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,279 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,291 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,302 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,312 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,320 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,341 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,345 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:34:27,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:34:27,346 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:34:27,346 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:34:27,347 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (1/1) ... [2021-11-25 20:34:27,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:34:27,365 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:27,376 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:34:27,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:34:27,423 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:34:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:34:27,424 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:34:27,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:34:27,559 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:34:27,560 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:34:27,578 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 20:34:28,082 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-25 20:34:28,082 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-25 20:34:28,082 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:34:28,224 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:34:28,225 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:34:28,227 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:28 BoogieIcfgContainer [2021-11-25 20:34:28,228 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:34:28,230 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:34:28,230 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:34:28,233 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:34:28,233 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:34:26" (1/3) ... [2021-11-25 20:34:28,234 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdf0baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:28, skipping insertion in model container [2021-11-25 20:34:28,234 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:34:27" (2/3) ... [2021-11-25 20:34:28,235 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1fdf0baa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:34:28, skipping insertion in model container [2021-11-25 20:34:28,235 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:34:28" (3/3) ... [2021-11-25 20:34:28,236 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_3a.BV.c.cil.c [2021-11-25 20:34:28,241 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:34:28,242 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:34:28,290 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:34:28,297 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 20:34:28,297 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:34:28,315 INFO L276 IsEmpty]: Start isEmpty. Operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:28,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:34:28,323 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:28,324 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] [2021-11-25 20:34:28,324 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:28,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1969173859, now seen corresponding path program 1 times [2021-11-25 20:34:28,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:28,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070511625] [2021-11-25 20:34:28,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:28,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:28,526 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 20:34:28,527 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:28,527 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070511625] [2021-11-25 20:34:28,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070511625] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:28,528 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:28,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:34:28,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850612500] [2021-11-25 20:34:28,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:28,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:28,535 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:28,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:28,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:28,564 INFO L87 Difference]: Start difference. First operand has 104 states, 102 states have (on average 1.7843137254901962) internal successors, (182), 103 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:28,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:28,740 INFO L93 Difference]: Finished difference Result 227 states and 396 transitions. [2021-11-25 20:34:28,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:28,743 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-25 20:34:28,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:28,753 INFO L225 Difference]: With dead ends: 227 [2021-11-25 20:34:28,753 INFO L226 Difference]: Without dead ends: 119 [2021-11-25 20:34:28,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:28,759 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 15 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:28,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 239 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:28,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2021-11-25 20:34:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2021-11-25 20:34:28,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.4827586206896552) internal successors, (172), 116 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 172 transitions. [2021-11-25 20:34:28,818 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 172 transitions. Word has length 39 [2021-11-25 20:34:28,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:28,818 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 172 transitions. [2021-11-25 20:34:28,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 13.0) internal successors, (39), 2 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 172 transitions. [2021-11-25 20:34:28,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:34:28,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:28,822 INFO L514 BasicCegarLoop]: trace histogram [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 20:34:28,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:34:28,823 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:28,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:28,824 INFO L85 PathProgramCache]: Analyzing trace with hash -635435317, now seen corresponding path program 1 times [2021-11-25 20:34:28,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:28,824 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220096637] [2021-11-25 20:34:28,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:28,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:28,899 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:28,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220096637] [2021-11-25 20:34:28,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220096637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:28,900 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:28,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:28,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022229556] [2021-11-25 20:34:28,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:28,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:28,902 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:28,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:28,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:28,903 INFO L87 Difference]: Start difference. First operand 117 states and 172 transitions. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:29,044 INFO L93 Difference]: Finished difference Result 253 states and 378 transitions. [2021-11-25 20:34:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:29,045 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-25 20:34:29,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:29,053 INFO L225 Difference]: With dead ends: 253 [2021-11-25 20:34:29,053 INFO L226 Difference]: Without dead ends: 138 [2021-11-25 20:34:29,059 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 20:34:29,061 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:29,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 189 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:29,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-25 20:34:29,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2021-11-25 20:34:29,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.4370370370370371) internal successors, (194), 135 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 194 transitions. [2021-11-25 20:34:29,081 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 194 transitions. Word has length 53 [2021-11-25 20:34:29,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:29,082 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 194 transitions. [2021-11-25 20:34:29,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,082 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 194 transitions. [2021-11-25 20:34:29,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:34:29,092 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:29,098 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2021-11-25 20:34:29,099 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:34:29,099 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:29,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:29,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1069830625, now seen corresponding path program 1 times [2021-11-25 20:34:29,100 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:29,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487343065] [2021-11-25 20:34:29,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:29,101 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:29,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:29,274 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-25 20:34:29,274 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:29,274 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487343065] [2021-11-25 20:34:29,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487343065] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:29,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:29,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:34:29,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343737730] [2021-11-25 20:34:29,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:29,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:34:29,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:29,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:34:29,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:34:29,277 INFO L87 Difference]: Start difference. First operand 136 states and 194 transitions. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:29,525 INFO L93 Difference]: Finished difference Result 314 states and 465 transitions. [2021-11-25 20:34:29,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:34:29,526 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-11-25 20:34:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:29,529 INFO L225 Difference]: With dead ends: 314 [2021-11-25 20:34:29,530 INFO L226 Difference]: Without dead ends: 180 [2021-11-25 20:34:29,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:34:29,540 INFO L933 BasicCegarLoop]: 125 mSDtfsCounter, 30 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:29,541 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 243 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:34:29,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-25 20:34:29,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 174. [2021-11-25 20:34:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.3641618497109826) internal successors, (236), 173 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 236 transitions. [2021-11-25 20:34:29,570 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 236 transitions. Word has length 70 [2021-11-25 20:34:29,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:29,570 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 236 transitions. [2021-11-25 20:34:29,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,571 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 236 transitions. [2021-11-25 20:34:29,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:34:29,573 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:29,573 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 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] [2021-11-25 20:34:29,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:34:29,574 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1028188361, now seen corresponding path program 1 times [2021-11-25 20:34:29,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:29,575 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523006490] [2021-11-25 20:34:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:29,575 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:29,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:29,728 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 42 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 20:34:29,728 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:29,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523006490] [2021-11-25 20:34:29,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523006490] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:29,729 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:29,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:29,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069499726] [2021-11-25 20:34:29,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:29,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:29,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:29,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:29,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:29,731 INFO L87 Difference]: Start difference. First operand 174 states and 236 transitions. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:29,901 INFO L93 Difference]: Finished difference Result 379 states and 528 transitions. [2021-11-25 20:34:29,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:29,902 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-25 20:34:29,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:29,906 INFO L225 Difference]: With dead ends: 379 [2021-11-25 20:34:29,906 INFO L226 Difference]: Without dead ends: 207 [2021-11-25 20:34:29,908 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 20:34:29,917 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:29,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 200 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:34:29,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-11-25 20:34:29,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 197. [2021-11-25 20:34:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.336734693877551) internal successors, (262), 196 states have internal predecessors, (262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 262 transitions. [2021-11-25 20:34:29,936 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 262 transitions. Word has length 89 [2021-11-25 20:34:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:29,938 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 262 transitions. [2021-11-25 20:34:29,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 262 transitions. [2021-11-25 20:34:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:34:29,945 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:29,946 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:29,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:34:29,946 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:29,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:29,951 INFO L85 PathProgramCache]: Analyzing trace with hash -844587216, now seen corresponding path program 1 times [2021-11-25 20:34:29,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:29,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395566690] [2021-11-25 20:34:29,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:29,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:30,097 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:30,097 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:30,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395566690] [2021-11-25 20:34:30,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395566690] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:30,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992663106] [2021-11-25 20:34:30,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:30,098 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:30,099 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:30,100 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:30,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:34:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:30,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:34:30,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-25 20:34:30,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:30,886 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-25 20:34:30,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992663106] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:34:30,887 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:34:30,887 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2021-11-25 20:34:30,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309862743] [2021-11-25 20:34:30,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:30,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:30,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:30,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:30,894 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:34:30,895 INFO L87 Difference]: Start difference. First operand 197 states and 262 transitions. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:30,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:30,935 INFO L93 Difference]: Finished difference Result 391 states and 521 transitions. [2021-11-25 20:34:30,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:30,936 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-11-25 20:34:30,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:30,939 INFO L225 Difference]: With dead ends: 391 [2021-11-25 20:34:30,939 INFO L226 Difference]: Without dead ends: 389 [2021-11-25 20:34:30,939 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:34:30,940 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 99 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:30,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [99 Valid, 272 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:34:30,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 389 states. [2021-11-25 20:34:30,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 389 to 388. [2021-11-25 20:34:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 387 states have (on average 1.3385012919896642) internal successors, (518), 387 states have internal predecessors, (518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:30,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 518 transitions. [2021-11-25 20:34:30,959 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 518 transitions. Word has length 108 [2021-11-25 20:34:30,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:30,960 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 518 transitions. [2021-11-25 20:34:30,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 2 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:30,960 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 518 transitions. [2021-11-25 20:34:30,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 20:34:30,963 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:30,963 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 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 20:34:31,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:31,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:31,164 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:31,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1883488336, now seen corresponding path program 1 times [2021-11-25 20:34:31,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:31,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804022672] [2021-11-25 20:34:31,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:31,165 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:31,185 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:34:31,185 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1285667060] [2021-11-25 20:34:31,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:31,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:31,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:31,187 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:31,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:34:31,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:31,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:34:31,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:31,494 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 148 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-11-25 20:34:31,495 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:31,495 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804022672] [2021-11-25 20:34:31,496 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:34:31,496 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285667060] [2021-11-25 20:34:31,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285667060] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:31,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:31,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:31,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259517807] [2021-11-25 20:34:31,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:31,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:31,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:31,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:31,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:31,500 INFO L87 Difference]: Start difference. First operand 388 states and 518 transitions. Second operand has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:31,654 INFO L93 Difference]: Finished difference Result 872 states and 1208 transitions. [2021-11-25 20:34:31,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:31,655 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-11-25 20:34:31,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:31,659 INFO L225 Difference]: With dead ends: 872 [2021-11-25 20:34:31,659 INFO L226 Difference]: Without dead ends: 486 [2021-11-25 20:34:31,660 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 140 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 20:34:31,662 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 28 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:31,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 187 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:31,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-11-25 20:34:31,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 466. [2021-11-25 20:34:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 1.3075268817204302) internal successors, (608), 465 states have internal predecessors, (608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 608 transitions. [2021-11-25 20:34:31,685 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 608 transitions. Word has length 142 [2021-11-25 20:34:31,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:31,685 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 608 transitions. [2021-11-25 20:34:31,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 39.666666666666664) internal successors, (119), 3 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 608 transitions. [2021-11-25 20:34:31,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:34:31,688 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:31,688 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:31,725 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:31,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-25 20:34:31,908 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:31,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:31,908 INFO L85 PathProgramCache]: Analyzing trace with hash 1740457734, now seen corresponding path program 1 times [2021-11-25 20:34:31,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:31,909 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226299856] [2021-11-25 20:34:31,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:31,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:31,935 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:34:31,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [525002580] [2021-11-25 20:34:31,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:31,936 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:31,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:31,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:31,955 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:34:32,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:32,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:34:32,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 143 proven. 0 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-25 20:34:32,255 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:32,255 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226299856] [2021-11-25 20:34:32,255 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:34:32,255 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525002580] [2021-11-25 20:34:32,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [525002580] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:32,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:32,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:32,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739231189] [2021-11-25 20:34:32,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:32,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:32,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:32,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:32,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:32,258 INFO L87 Difference]: Start difference. First operand 466 states and 608 transitions. Second operand has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:32,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:32,398 INFO L93 Difference]: Finished difference Result 994 states and 1330 transitions. [2021-11-25 20:34:32,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:32,398 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-25 20:34:32,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:32,402 INFO L225 Difference]: With dead ends: 994 [2021-11-25 20:34:32,402 INFO L226 Difference]: Without dead ends: 530 [2021-11-25 20:34:32,403 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 145 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 20:34:32,407 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 15 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 150 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:32,407 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 200 Invalid, 150 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:32,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2021-11-25 20:34:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 516. [2021-11-25 20:34:32,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 516 states, 515 states have (on average 1.2893203883495146) internal successors, (664), 515 states have internal predecessors, (664), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:32,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 516 states to 516 states and 664 transitions. [2021-11-25 20:34:32,424 INFO L78 Accepts]: Start accepts. Automaton has 516 states and 664 transitions. Word has length 147 [2021-11-25 20:34:32,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:32,425 INFO L470 AbstractCegarLoop]: Abstraction has 516 states and 664 transitions. [2021-11-25 20:34:32,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.666666666666664) internal successors, (98), 3 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:32,426 INFO L276 IsEmpty]: Start isEmpty. Operand 516 states and 664 transitions. [2021-11-25 20:34:32,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-25 20:34:32,428 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:32,428 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:32,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-25 20:34:32,640 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:32,640 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:32,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:32,641 INFO L85 PathProgramCache]: Analyzing trace with hash 948455536, now seen corresponding path program 1 times [2021-11-25 20:34:32,641 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:32,641 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306752812] [2021-11-25 20:34:32,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:32,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:32,659 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:34:32,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [497405827] [2021-11-25 20:34:32,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:32,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:32,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:32,660 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:32,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:34:32,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:32,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-25 20:34:32,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 134 proven. 0 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2021-11-25 20:34:32,963 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:32,963 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306752812] [2021-11-25 20:34:32,963 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:34:32,963 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497405827] [2021-11-25 20:34:32,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497405827] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:32,963 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:32,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:32,964 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272599045] [2021-11-25 20:34:32,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:32,964 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:32,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:32,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:32,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:32,965 INFO L87 Difference]: Start difference. First operand 516 states and 664 transitions. Second operand has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:33,122 INFO L93 Difference]: Finished difference Result 1136 states and 1508 transitions. [2021-11-25 20:34:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-25 20:34:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:33,127 INFO L225 Difference]: With dead ends: 1136 [2021-11-25 20:34:33,127 INFO L226 Difference]: Without dead ends: 620 [2021-11-25 20:34:33,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 149 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 20:34:33,129 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 122 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:33,129 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 93 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:33,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2021-11-25 20:34:33,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 610. [2021-11-25 20:34:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 610 states, 609 states have (on average 1.3431855500821017) internal successors, (818), 609 states have internal predecessors, (818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 610 states to 610 states and 818 transitions. [2021-11-25 20:34:33,163 INFO L78 Accepts]: Start accepts. Automaton has 610 states and 818 transitions. Word has length 151 [2021-11-25 20:34:33,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:33,163 INFO L470 AbstractCegarLoop]: Abstraction has 610 states and 818 transitions. [2021-11-25 20:34:33,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.333333333333336) internal successors, (97), 3 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 610 states and 818 transitions. [2021-11-25 20:34:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-25 20:34:33,166 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:33,166 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-25 20:34:33,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:33,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-11-25 20:34:33,380 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:33,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:33,381 INFO L85 PathProgramCache]: Analyzing trace with hash 415303024, now seen corresponding path program 1 times [2021-11-25 20:34:33,381 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:33,381 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704475977] [2021-11-25 20:34:33,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:33,381 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:33,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 187 proven. 0 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2021-11-25 20:34:33,467 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:33,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704475977] [2021-11-25 20:34:33,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704475977] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:33,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:33,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:33,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822069505] [2021-11-25 20:34:33,468 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:33,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:33,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:33,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:33,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:33,469 INFO L87 Difference]: Start difference. First operand 610 states and 818 transitions. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:33,600 INFO L93 Difference]: Finished difference Result 1276 states and 1732 transitions. [2021-11-25 20:34:33,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:33,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-11-25 20:34:33,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:33,605 INFO L225 Difference]: With dead ends: 1276 [2021-11-25 20:34:33,605 INFO L226 Difference]: Without dead ends: 668 [2021-11-25 20:34:33,606 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 20:34:33,608 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:33,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 200 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:33,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-11-25 20:34:33,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 664. [2021-11-25 20:34:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 663 states have (on average 1.3242835595776772) internal successors, (878), 663 states have internal predecessors, (878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 878 transitions. [2021-11-25 20:34:33,630 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 878 transitions. Word has length 169 [2021-11-25 20:34:33,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:33,630 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 878 transitions. [2021-11-25 20:34:33,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,631 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 878 transitions. [2021-11-25 20:34:33,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 20:34:33,633 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:33,633 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 3, 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] [2021-11-25 20:34:33,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:34:33,634 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:33,634 INFO L85 PathProgramCache]: Analyzing trace with hash -406296160, now seen corresponding path program 1 times [2021-11-25 20:34:33,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:33,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921680393] [2021-11-25 20:34:33,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:33,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:33,704 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 189 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-11-25 20:34:33,704 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:33,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921680393] [2021-11-25 20:34:33,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921680393] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:33,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:33,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:34:33,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213692509] [2021-11-25 20:34:33,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:33,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:34:33,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:33,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:34:33,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:34:33,706 INFO L87 Difference]: Start difference. First operand 664 states and 878 transitions. Second operand has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:33,838 INFO L93 Difference]: Finished difference Result 1384 states and 1856 transitions. [2021-11-25 20:34:33,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:34:33,839 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 173 [2021-11-25 20:34:33,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:33,845 INFO L225 Difference]: With dead ends: 1384 [2021-11-25 20:34:33,845 INFO L226 Difference]: Without dead ends: 722 [2021-11-25 20:34:33,846 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 20:34:33,847 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 10 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:33,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 197 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:34:33,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 722 states. [2021-11-25 20:34:33,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 722 to 722. [2021-11-25 20:34:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 722 states, 721 states have (on average 1.3065187239944522) internal successors, (942), 721 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 722 states to 722 states and 942 transitions. [2021-11-25 20:34:33,868 INFO L78 Accepts]: Start accepts. Automaton has 722 states and 942 transitions. Word has length 173 [2021-11-25 20:34:33,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:33,869 INFO L470 AbstractCegarLoop]: Abstraction has 722 states and 942 transitions. [2021-11-25 20:34:33,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 36.666666666666664) internal successors, (110), 3 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:33,869 INFO L276 IsEmpty]: Start isEmpty. Operand 722 states and 942 transitions. [2021-11-25 20:34:33,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 20:34:33,872 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:33,872 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 5, 5, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:33,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:34:33,873 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:33,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:33,873 INFO L85 PathProgramCache]: Analyzing trace with hash -1832713271, now seen corresponding path program 1 times [2021-11-25 20:34:33,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:33,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38418553] [2021-11-25 20:34:33,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:33,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:33,900 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:34:33,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1506734187] [2021-11-25 20:34:33,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:33,900 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:33,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:33,901 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:33,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:34:34,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:34,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:34:34,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:34,385 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 139 proven. 0 refuted. 0 times theorem prover too weak. 327 trivial. 0 not checked. [2021-11-25 20:34:34,385 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:34:34,385 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38418553] [2021-11-25 20:34:34,386 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:34:34,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506734187] [2021-11-25 20:34:34,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506734187] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:34:34,386 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:34:34,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:34:34,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122361383] [2021-11-25 20:34:34,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:34:34,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:34:34,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:34:34,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:34:34,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:34:34,388 INFO L87 Difference]: Start difference. First operand 722 states and 942 transitions. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:34:34,623 INFO L93 Difference]: Finished difference Result 1566 states and 2101 transitions. [2021-11-25 20:34:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:34:34,624 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 200 [2021-11-25 20:34:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:34:34,629 INFO L225 Difference]: With dead ends: 1566 [2021-11-25 20:34:34,629 INFO L226 Difference]: Without dead ends: 766 [2021-11-25 20:34:34,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:34:34,631 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 50 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:34:34,631 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 264 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:34:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-11-25 20:34:34,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 743. [2021-11-25 20:34:34,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 743 states, 742 states have (on average 1.2964959568733154) internal successors, (962), 742 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:34,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 743 states to 743 states and 962 transitions. [2021-11-25 20:34:34,652 INFO L78 Accepts]: Start accepts. Automaton has 743 states and 962 transitions. Word has length 200 [2021-11-25 20:34:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:34:34,653 INFO L470 AbstractCegarLoop]: Abstraction has 743 states and 962 transitions. [2021-11-25 20:34:34,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:34:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 743 states and 962 transitions. [2021-11-25 20:34:34,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 20:34:34,656 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:34:34,657 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:34:34,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-25 20:34:34,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-25 20:34:34,872 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:34:34,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:34:34,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1336698202, now seen corresponding path program 1 times [2021-11-25 20:34:34,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:34:34,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676951571] [2021-11-25 20:34:34,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:34,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:34:34,895 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:34:34,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [603439254] [2021-11-25 20:34:34,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:34:34,896 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:34:34,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:34:34,897 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:34:34,901 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-25 20:34:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:34:35,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 424 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:34:35,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:34:35,328 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-25 20:34:35,329 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:34:35,697 INFO L134 CoverageAnalysis]: Checked inductivity of 639 backedges. 442 proven. 25 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2021-11-25 20:34:35,697 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:34:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676951571] [2021-11-25 20:34:35,697 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:34:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603439254] [2021-11-25 20:34:35,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603439254] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:34:35,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1796687835] [2021-11-25 20:34:35,718 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-25 20:34:35,718 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:34:35,725 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:34:35,732 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:34:35,732 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:35:45,595 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:36:12,553 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '20112#(and (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483647) (= |ULTIMATE.start_ssl3_accept_~skip~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~initial_state#1| 8464) (<= 8464 |ULTIMATE.start_main_~s~0#1|) (<= |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_#in~initial_state#1| 8464) (<= |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__hit~0#1|)) (<= |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__hit~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483648)) (<= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483648)) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1|)) (<= |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483647) (<= 0 |ULTIMATE.start_ssl3_accept_~got_new_session~0#1|) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~blastFlag~0#1| 4) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483648)) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1|)) (<= 8464 |ULTIMATE.start_ssl3_accept_~initial_state#1|) (<= |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483648)) (<= |ULTIMATE.start_main_~s~0#1| 8464) (<= |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483647) (= |ULTIMATE.start_ssl3_accept_~s__state~0#1| 8672) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483647) (<= 0 |#NULL.offset|) (<= |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483647) (<= 8464 |ULTIMATE.start_ssl3_accept_#in~initial_state#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483647) (= |#NULL.base| 0) (<= |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483647))' at error location [2021-11-25 20:36:12,553 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:12,554 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:36:12,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-25 20:36:12,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898250496] [2021-11-25 20:36:12,554 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:12,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:36:12,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:12,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:36:12,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=639, Invalid=3393, Unknown=0, NotChecked=0, Total=4032 [2021-11-25 20:36:12,558 INFO L87 Difference]: Start difference. First operand 743 states and 962 transitions. Second operand has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:13,069 INFO L93 Difference]: Finished difference Result 2549 states and 3454 transitions. [2021-11-25 20:36:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:36:13,069 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 238 [2021-11-25 20:36:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:13,079 INFO L225 Difference]: With dead ends: 2549 [2021-11-25 20:36:13,080 INFO L226 Difference]: Without dead ends: 1726 [2021-11-25 20:36:13,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 716 GetRequests, 645 SyntacticMatches, 7 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2048 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=651, Invalid=3639, Unknown=0, NotChecked=0, Total=4290 [2021-11-25 20:36:13,084 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 391 mSDsluCounter, 323 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 523 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:13,085 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 463 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:36:13,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1726 states. [2021-11-25 20:36:13,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1726 to 1153. [2021-11-25 20:36:13,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1152 states have (on average 1.4097222222222223) internal successors, (1624), 1152 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1624 transitions. [2021-11-25 20:36:13,139 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1624 transitions. Word has length 238 [2021-11-25 20:36:13,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:13,139 INFO L470 AbstractCegarLoop]: Abstraction has 1153 states and 1624 transitions. [2021-11-25 20:36:13,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.666666666666664) internal successors, (208), 6 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:13,140 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1624 transitions. [2021-11-25 20:36:13,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-25 20:36:13,143 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:13,144 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 4, 4, 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] [2021-11-25 20:36:13,179 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-25 20:36:13,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:36:13,368 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:13,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:13,369 INFO L85 PathProgramCache]: Analyzing trace with hash -122400423, now seen corresponding path program 1 times [2021-11-25 20:36:13,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:13,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854648387] [2021-11-25 20:36:13,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:13,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:13,396 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:36:13,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [653285504] [2021-11-25 20:36:13,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:13,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:13,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:13,398 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:13,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-25 20:36:13,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:13,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 421 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:36:13,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:36:13,991 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 317 proven. 176 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-25 20:36:13,991 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:36:14,431 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 368 proven. 125 refuted. 0 times theorem prover too weak. 132 trivial. 0 not checked. [2021-11-25 20:36:14,432 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:36:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854648387] [2021-11-25 20:36:14,432 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:36:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653285504] [2021-11-25 20:36:14,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653285504] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:36:14,432 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1270989457] [2021-11-25 20:36:14,436 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2021-11-25 20:36:14,436 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:36:14,437 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:36:14,437 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:36:14,437 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:36:39,142 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:36:58,457 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '25941#(and (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483647) (= |ULTIMATE.start_ssl3_accept_~skip~0#1| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~initial_state#1| 8464) (<= |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___6~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_#in~initial_state#1| 8464) (<= |ULTIMATE.start_ssl3_accept_~tmp___10~0#1| 2147483647) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__hit~0#1|)) (<= |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__hit~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__cert~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___4~0#1| 2147483648)) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1|)) (<= |ULTIMATE.start_ssl3_accept_~tmp___9~0#1| 2147483647) (<= 0 |ULTIMATE.start_ssl3_accept_~got_new_session~0#1|) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___1~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___3~0#1| 2147483648)) (= |ULTIMATE.start_ssl3_accept_~blastFlag~0#1| 4) (= 8464 |ULTIMATE.start_main_~s~0#1|) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__session__peer~0#1| 2147483648)) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algo_strength~0#1|)) (<= 8464 |ULTIMATE.start_ssl3_accept_~initial_state#1|) (<= |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~Time~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~s__debug~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__options~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483647) (= |ULTIMATE.start_ssl3_accept_~s__state~0#1| 8672) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~tmp___5~0#1| 2147483647) (= |#NULL.offset| 0) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___8~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher__algorithms~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__cert__pkeys__AT0__privatekey~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_~num1~0#1| 2147483647) (<= 8464 |ULTIMATE.start_ssl3_accept_#in~initial_state#1|) (<= 0 |#StackHeapBarrier|) (<= |ULTIMATE.start_ssl3_accept_~ret~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~tmp___2~0#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__version~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~cb~0#1| 2147483647) (= |#NULL.base| 0) (<= |ULTIMATE.start_ssl3_accept_~s__ctx__info_callback~0#1| 2147483647))' at error location [2021-11-25 20:36:58,457 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:36:58,457 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:36:58,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-11-25 20:36:58,458 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529028837] [2021-11-25 20:36:58,458 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-25 20:36:58,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-25 20:36:58,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:36:58,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-25 20:36:58,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=2542, Unknown=0, NotChecked=0, Total=2970 [2021-11-25 20:36:58,461 INFO L87 Difference]: Start difference. First operand 1153 states and 1624 transitions. Second operand has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:59,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:36:59,272 INFO L93 Difference]: Finished difference Result 3365 states and 4747 transitions. [2021-11-25 20:36:59,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:36:59,273 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 246 [2021-11-25 20:36:59,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:36:59,282 INFO L225 Difference]: With dead ends: 3365 [2021-11-25 20:36:59,283 INFO L226 Difference]: Without dead ends: 1565 [2021-11-25 20:36:59,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 744 GetRequests, 673 SyntacticMatches, 13 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1772 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=457, Invalid=3083, Unknown=0, NotChecked=0, Total=3540 [2021-11-25 20:36:59,290 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 250 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 1008 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 683 SdHoareTripleChecker+Invalid, 1081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1008 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2021-11-25 20:36:59,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 683 Invalid, 1081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1008 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2021-11-25 20:36:59,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1565 states. [2021-11-25 20:36:59,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1565 to 1384. [2021-11-25 20:36:59,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1384 states, 1383 states have (on average 1.3752711496746204) internal successors, (1902), 1383 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:59,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1384 states to 1384 states and 1902 transitions. [2021-11-25 20:36:59,341 INFO L78 Accepts]: Start accepts. Automaton has 1384 states and 1902 transitions. Word has length 246 [2021-11-25 20:36:59,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:36:59,342 INFO L470 AbstractCegarLoop]: Abstraction has 1384 states and 1902 transitions. [2021-11-25 20:36:59,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 31.285714285714285) internal successors, (219), 7 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:36:59,342 INFO L276 IsEmpty]: Start isEmpty. Operand 1384 states and 1902 transitions. [2021-11-25 20:36:59,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-25 20:36:59,346 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:36:59,347 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 8, 8, 7, 7, 6, 6, 6, 6, 5, 4, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:36:59,383 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-25 20:36:59,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:59,560 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:36:59,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:36:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash -2031857747, now seen corresponding path program 1 times [2021-11-25 20:36:59,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:36:59,561 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178896767] [2021-11-25 20:36:59,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:59,561 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:36:59,584 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:36:59,585 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1958343647] [2021-11-25 20:36:59,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:36:59,585 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:36:59,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:36:59,586 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:36:59,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-25 20:36:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:36:59,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:36:59,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:00,116 INFO L134 CoverageAnalysis]: Checked inductivity of 1047 backedges. 616 proven. 0 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-11-25 20:37:00,116 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:37:00,116 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178896767] [2021-11-25 20:37:00,116 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:00,116 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958343647] [2021-11-25 20:37:00,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958343647] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:37:00,116 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:37:00,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:37:00,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954220913] [2021-11-25 20:37:00,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:37:00,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:37:00,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:37:00,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:37:00,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:37:00,118 INFO L87 Difference]: Start difference. First operand 1384 states and 1902 transitions. Second operand has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:00,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:37:00,266 INFO L93 Difference]: Finished difference Result 2936 states and 4092 transitions. [2021-11-25 20:37:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:37:00,266 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 300 [2021-11-25 20:37:00,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:37:00,275 INFO L225 Difference]: With dead ends: 2936 [2021-11-25 20:37:00,275 INFO L226 Difference]: Without dead ends: 1554 [2021-11-25 20:37:00,278 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 298 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 20:37:00,278 INFO L933 BasicCegarLoop]: 143 mSDtfsCounter, 8 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:37:00,279 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 198 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:37:00,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-11-25 20:37:00,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1544. [2021-11-25 20:37:00,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 1.3460790667530784) internal successors, (2077), 1543 states have internal predecessors, (2077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:00,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2077 transitions. [2021-11-25 20:37:00,332 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2077 transitions. Word has length 300 [2021-11-25 20:37:00,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:37:00,333 INFO L470 AbstractCegarLoop]: Abstraction has 1544 states and 2077 transitions. [2021-11-25 20:37:00,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 44.666666666666664) internal successors, (134), 3 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-25 20:37:00,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2077 transitions. [2021-11-25 20:37:00,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-25 20:37:00,339 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:37:00,339 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 9, 9, 8, 8, 7, 7, 7, 7, 6, 5, 5, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-25 20:37:00,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-25 20:37:00,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-25 20:37:00,556 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:37:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:37:00,557 INFO L85 PathProgramCache]: Analyzing trace with hash 11343321, now seen corresponding path program 1 times [2021-11-25 20:37:00,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:37:00,557 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645326775] [2021-11-25 20:37:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:00,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:37:00,589 ERROR L247 FreeRefinementEngine]: Caught known exception: Unsupported non-linear arithmetic [2021-11-25 20:37:00,589 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1250741639] [2021-11-25 20:37:00,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:37:00,590 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:37:00,590 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:37:00,591 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:37:00,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_ef5aa6ab-680f-4044-84ca-8649a17a3961/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-25 20:37:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:37:00,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 550 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-25 20:37:00,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:37:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 492 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2021-11-25 20:37:01,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:37:03,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1292 backedges. 0 proven. 446 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2021-11-25 20:37:03,188 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:37:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645326775] [2021-11-25 20:37:03,188 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2021-11-25 20:37:03,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250741639] [2021-11-25 20:37:03,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250741639] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:37:03,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1347723293] [2021-11-25 20:37:03,196 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2021-11-25 20:37:03,196 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:37:03,196 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:37:03,197 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:37:03,197 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs