./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/bitvector/s3_srvr_1a.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_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/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_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/config/TaipanReach.xml -i ../../sv-benchmarks/c/bitvector/s3_srvr_1a.BV.c.cil.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/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_72dc413a-a983-4006-8cb0-dbe6d119a46a/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 a3777e2ab1819fd82e3658352e2b99c7da6626d046ae65288a9623558224827f --- Real Ultimate output --- This is Ultimate 0.2.2-hotfix-svcomp22-839c364 [2021-11-25 20:31:23,155 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-25 20:31:23,158 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-25 20:31:23,208 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-25 20:31:23,209 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-25 20:31:23,210 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-25 20:31:23,212 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-25 20:31:23,214 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-25 20:31:23,217 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-25 20:31:23,218 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-25 20:31:23,219 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-25 20:31:23,221 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-25 20:31:23,221 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-25 20:31:23,223 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-25 20:31:23,225 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-25 20:31:23,226 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-25 20:31:23,228 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-25 20:31:23,229 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-25 20:31:23,237 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-25 20:31:23,245 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-25 20:31:23,248 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-25 20:31:23,253 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-25 20:31:23,257 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-25 20:31:23,258 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-25 20:31:23,265 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-25 20:31:23,268 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-25 20:31:23,269 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-25 20:31:23,271 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-25 20:31:23,271 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-25 20:31:23,273 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-25 20:31:23,273 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-25 20:31:23,274 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-25 20:31:23,276 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-25 20:31:23,277 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-25 20:31:23,279 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-25 20:31:23,279 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-25 20:31:23,280 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-25 20:31:23,280 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-25 20:31:23,280 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-25 20:31:23,281 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-25 20:31:23,282 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-25 20:31:23,283 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-25 20:31:23,309 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-25 20:31:23,309 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-25 20:31:23,309 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-25 20:31:23,309 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-25 20:31:23,310 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-25 20:31:23,310 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-25 20:31:23,310 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-25 20:31:23,311 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-25 20:31:23,311 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-25 20:31:23,311 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-25 20:31:23,311 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-25 20:31:23,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-25 20:31:23,312 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-25 20:31:23,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-25 20:31:23,312 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-25 20:31:23,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-25 20:31:23,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-25 20:31:23,313 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-25 20:31:23,313 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-25 20:31:23,314 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-25 20:31:23,314 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-25 20:31:23,314 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-25 20:31:23,314 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-25 20:31:23,318 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-25 20:31:23,318 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-25 20:31:23,318 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-25 20:31:23,319 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-25 20:31:23,319 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-25 20:31:23,319 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-25 20:31:23,319 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-25 20:31:23,319 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-25 20:31:23,320 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-25 20:31:23,320 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:23,320 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-25 20:31:23,320 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-25 20:31:23,320 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-25 20:31:23,321 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-25 20:31:23,321 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-25 20:31:23,321 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-25 20:31:23,321 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-25 20:31:23,321 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-25 20:31:23,322 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_72dc413a-a983-4006-8cb0-dbe6d119a46a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a3777e2ab1819fd82e3658352e2b99c7da6626d046ae65288a9623558224827f [2021-11-25 20:31:23,637 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-25 20:31:23,672 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-25 20:31:23,674 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-25 20:31:23,675 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-25 20:31:23,676 INFO L275 PluginConnector]: CDTParser initialized [2021-11-25 20:31:23,677 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/../../sv-benchmarks/c/bitvector/s3_srvr_1a.BV.c.cil.c [2021-11-25 20:31:23,744 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/data/957baa311/1e0d8904d90148719030f30710b898eb/FLAGfea6e3a08 [2021-11-25 20:31:24,301 INFO L306 CDTParser]: Found 1 translation units. [2021-11-25 20:31:24,302 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/sv-benchmarks/c/bitvector/s3_srvr_1a.BV.c.cil.c [2021-11-25 20:31:24,322 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/data/957baa311/1e0d8904d90148719030f30710b898eb/FLAGfea6e3a08 [2021-11-25 20:31:24,613 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/data/957baa311/1e0d8904d90148719030f30710b898eb [2021-11-25 20:31:24,616 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-25 20:31:24,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-25 20:31:24,622 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:24,622 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-25 20:31:24,625 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-25 20:31:24,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:24" (1/1) ... [2021-11-25 20:31:24,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2660299a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:24, skipping insertion in model container [2021-11-25 20:31:24,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.11 08:31:24" (1/1) ... [2021-11-25 20:31:24,635 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-25 20:31:24,695 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-25 20:31:24,947 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/sv-benchmarks/c/bitvector/s3_srvr_1a.BV.c.cil.c[44949,44962] [2021-11-25 20:31:24,955 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:24,963 INFO L203 MainTranslator]: Completed pre-run [2021-11-25 20:31:25,044 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_72dc413a-a983-4006-8cb0-dbe6d119a46a/sv-benchmarks/c/bitvector/s3_srvr_1a.BV.c.cil.c[44949,44962] [2021-11-25 20:31:25,048 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-25 20:31:25,061 INFO L208 MainTranslator]: Completed translation [2021-11-25 20:31:25,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25 WrapperNode [2021-11-25 20:31:25,062 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-25 20:31:25,063 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:25,063 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-25 20:31:25,063 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-25 20:31:25,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,085 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,130 INFO L137 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 521 [2021-11-25 20:31:25,130 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-25 20:31:25,131 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-25 20:31:25,131 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-25 20:31:25,131 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-25 20:31:25,139 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,140 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,154 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,162 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,165 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-25 20:31:25,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-25 20:31:25,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-25 20:31:25,171 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-25 20:31:25,172 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (1/1) ... [2021-11-25 20:31:25,193 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-25 20:31:25,205 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:25,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-25 20:31:25,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-25 20:31:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-25 20:31:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-25 20:31:25,255 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-25 20:31:25,256 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-25 20:31:25,382 INFO L236 CfgBuilder]: Building ICFG [2021-11-25 20:31:25,384 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-25 20:31:25,418 WARN L815 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2021-11-25 20:31:26,030 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##90: assume false; [2021-11-25 20:31:26,030 INFO L768 $ProcedureCfgBuilder]: dead code at ProgramPoint $Ultimate##91: assume !false; [2021-11-25 20:31:26,031 INFO L277 CfgBuilder]: Performing block encoding [2021-11-25 20:31:26,159 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-25 20:31:26,159 INFO L301 CfgBuilder]: Removed 1 assume(true) statements. [2021-11-25 20:31:26,162 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:26 BoogieIcfgContainer [2021-11-25 20:31:26,162 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-25 20:31:26,164 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-25 20:31:26,164 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-25 20:31:26,167 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-25 20:31:26,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.11 08:31:24" (1/3) ... [2021-11-25 20:31:26,168 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588a8dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:26, skipping insertion in model container [2021-11-25 20:31:26,168 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.11 08:31:25" (2/3) ... [2021-11-25 20:31:26,169 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@588a8dcd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.11 08:31:26, skipping insertion in model container [2021-11-25 20:31:26,169 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.11 08:31:26" (3/3) ... [2021-11-25 20:31:26,170 INFO L111 eAbstractionObserver]: Analyzing ICFG s3_srvr_1a.BV.c.cil.c [2021-11-25 20:31:26,175 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-25 20:31:26,176 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-25 20:31:26,223 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-25 20:31:26,230 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 20:31:26,231 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-25 20:31:26,256 INFO L276 IsEmpty]: Start isEmpty. Operand has 105 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 104 states have internal predecessors, (183), 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 20:31:26,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-25 20:31:26,264 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:26,264 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 20:31:26,265 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:26,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:26,270 INFO L85 PathProgramCache]: Analyzing trace with hash -1062031925, now seen corresponding path program 1 times [2021-11-25 20:31:26,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:26,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348954437] [2021-11-25 20:31:26,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:26,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:26,541 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 20:31:26,541 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:26,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348954437] [2021-11-25 20:31:26,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348954437] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:26,543 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:26,543 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-25 20:31:26,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385694090] [2021-11-25 20:31:26,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:26,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:26,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:26,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:26,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:26,579 INFO L87 Difference]: Start difference. First operand has 105 states, 103 states have (on average 1.7766990291262137) internal successors, (183), 104 states have internal predecessors, (183), 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 20:31:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:26,765 INFO L93 Difference]: Finished difference Result 229 states and 398 transitions. [2021-11-25 20:31:26,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:26,767 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 20:31:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:26,780 INFO L225 Difference]: With dead ends: 229 [2021-11-25 20:31:26,780 INFO L226 Difference]: Without dead ends: 120 [2021-11-25 20:31:26,784 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 20:31:26,789 INFO L933 BasicCegarLoop]: 162 mSDtfsCounter, 15 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:26,790 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 240 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:26,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-25 20:31:26,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 118. [2021-11-25 20:31:26,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.4871794871794872) internal successors, (174), 117 states have internal predecessors, (174), 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 20:31:26,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 174 transitions. [2021-11-25 20:31:26,850 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 174 transitions. Word has length 39 [2021-11-25 20:31:26,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:26,851 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 174 transitions. [2021-11-25 20:31:26,851 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 20:31:26,851 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 174 transitions. [2021-11-25 20:31:26,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-25 20:31:26,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:26,856 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 20:31:26,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-25 20:31:26,857 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:26,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:26,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1912523520, now seen corresponding path program 1 times [2021-11-25 20:31:26,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:26,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878480286] [2021-11-25 20:31:26,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:26,862 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:26,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:26,986 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 20:31:26,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:26,988 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878480286] [2021-11-25 20:31:26,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878480286] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:26,989 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:26,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:26,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208031275] [2021-11-25 20:31:26,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:26,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:26,992 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:26,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:26,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:26,993 INFO L87 Difference]: Start difference. First operand 118 states and 174 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 20:31:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:27,172 INFO L93 Difference]: Finished difference Result 255 states and 382 transitions. [2021-11-25 20:31:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:27,173 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 20:31:27,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:27,175 INFO L225 Difference]: With dead ends: 255 [2021-11-25 20:31:27,175 INFO L226 Difference]: Without dead ends: 139 [2021-11-25 20:31:27,176 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 20:31:27,178 INFO L933 BasicCegarLoop]: 135 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:27,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 192 Invalid, 138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:27,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-11-25 20:31:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2021-11-25 20:31:27,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.4411764705882353) internal successors, (196), 136 states have internal predecessors, (196), 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 20:31:27,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2021-11-25 20:31:27,191 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 53 [2021-11-25 20:31:27,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:27,191 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2021-11-25 20:31:27,192 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 20:31:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2021-11-25 20:31:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-25 20:31:27,195 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:27,195 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 20:31:27,195 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-25 20:31:27,196 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash -1929057099, now seen corresponding path program 1 times [2021-11-25 20:31:27,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730691844] [2021-11-25 20:31:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:27,197 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:27,294 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 20:31:27,295 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:27,295 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730691844] [2021-11-25 20:31:27,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730691844] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:27,295 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:27,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-25 20:31:27,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789272828] [2021-11-25 20:31:27,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:27,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:27,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:27,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:27,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-11-25 20:31:27,300 INFO L87 Difference]: Start difference. First operand 137 states and 196 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 20:31:27,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:27,507 INFO L93 Difference]: Finished difference Result 316 states and 469 transitions. [2021-11-25 20:31:27,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:31:27,508 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 20:31:27,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:27,512 INFO L225 Difference]: With dead ends: 316 [2021-11-25 20:31:27,512 INFO L226 Difference]: Without dead ends: 181 [2021-11-25 20:31:27,516 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 20:31:27,522 INFO L933 BasicCegarLoop]: 126 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:27,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 194 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:27,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-25 20:31:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 175. [2021-11-25 20:31:27,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.367816091954023) internal successors, (238), 174 states have internal predecessors, (238), 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 20:31:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 238 transitions. [2021-11-25 20:31:27,547 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 238 transitions. Word has length 70 [2021-11-25 20:31:27,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:27,549 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 238 transitions. [2021-11-25 20:31:27,550 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 20:31:27,550 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 238 transitions. [2021-11-25 20:31:27,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-25 20:31:27,560 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:27,561 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 20:31:27,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-25 20:31:27,562 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:27,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:27,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1994167257, now seen corresponding path program 1 times [2021-11-25 20:31:27,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:27,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843632294] [2021-11-25 20:31:27,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:27,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:27,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:27,679 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 20:31:27,679 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:27,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843632294] [2021-11-25 20:31:27,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843632294] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:27,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:27,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:27,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572920026] [2021-11-25 20:31:27,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:27,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:27,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:27,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:27,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:27,686 INFO L87 Difference]: Start difference. First operand 175 states and 238 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 20:31:27,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:27,843 INFO L93 Difference]: Finished difference Result 381 states and 532 transitions. [2021-11-25 20:31:27,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:27,844 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 20:31:27,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:27,847 INFO L225 Difference]: With dead ends: 381 [2021-11-25 20:31:27,847 INFO L226 Difference]: Without dead ends: 208 [2021-11-25 20:31:27,849 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 20:31:27,858 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 22 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:27,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 203 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:27,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-25 20:31:27,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 198. [2021-11-25 20:31:27,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.3401015228426396) internal successors, (264), 197 states have internal predecessors, (264), 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 20:31:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 264 transitions. [2021-11-25 20:31:27,876 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 264 transitions. Word has length 89 [2021-11-25 20:31:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:27,877 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 264 transitions. [2021-11-25 20:31:27,877 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 20:31:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 264 transitions. [2021-11-25 20:31:27,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-25 20:31:27,879 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:27,879 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 20:31:27,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-25 20:31:27,880 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:27,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:27,880 INFO L85 PathProgramCache]: Analyzing trace with hash 243557634, now seen corresponding path program 1 times [2021-11-25 20:31:27,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:27,881 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874506855] [2021-11-25 20:31:27,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:27,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:27,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:28,037 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 20:31:28,038 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874506855] [2021-11-25 20:31:28,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874506855] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:28,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735395783] [2021-11-25 20:31:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:28,039 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:28,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:28,041 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:28,072 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-25 20:31:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:28,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-25 20:31:28,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:28,610 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 20:31:28,610 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:28,902 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 20:31:28,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735395783] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:28,903 INFO L186 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2021-11-25 20:31:28,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5, 5] total 6 [2021-11-25 20:31:28,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79110490] [2021-11-25 20:31:28,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:28,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:28,904 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:28,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:28,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-25 20:31:28,905 INFO L87 Difference]: Start difference. First operand 198 states and 264 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 20:31:28,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:28,954 INFO L93 Difference]: Finished difference Result 393 states and 525 transitions. [2021-11-25 20:31:28,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:28,954 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 20:31:28,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:28,958 INFO L225 Difference]: With dead ends: 393 [2021-11-25 20:31:28,958 INFO L226 Difference]: Without dead ends: 391 [2021-11-25 20:31:28,958 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 20:31:28,959 INFO L933 BasicCegarLoop]: 137 mSDtfsCounter, 100 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:28,960 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 271 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-25 20:31:28,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-11-25 20:31:28,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 390. [2021-11-25 20:31:28,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 1.339331619537275) internal successors, (521), 389 states have internal predecessors, (521), 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 20:31:28,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 521 transitions. [2021-11-25 20:31:28,978 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 521 transitions. Word has length 108 [2021-11-25 20:31:28,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:28,978 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 521 transitions. [2021-11-25 20:31:28,979 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 20:31:28,979 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 521 transitions. [2021-11-25 20:31:28,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-25 20:31:28,981 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:28,981 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 20:31:29,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:29,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:29,194 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:29,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1515832384, now seen corresponding path program 1 times [2021-11-25 20:31:29,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,195 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079104197] [2021-11-25 20:31:29,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,262 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 20:31:29,262 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:29,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079104197] [2021-11-25 20:31:29,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079104197] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:29,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:29,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:29,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542785431] [2021-11-25 20:31:29,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:29,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:29,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:29,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:29,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:29,265 INFO L87 Difference]: Start difference. First operand 390 states and 521 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 20:31:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:29,413 INFO L93 Difference]: Finished difference Result 876 states and 1214 transitions. [2021-11-25 20:31:29,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:29,417 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 20:31:29,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:29,423 INFO L225 Difference]: With dead ends: 876 [2021-11-25 20:31:29,423 INFO L226 Difference]: Without dead ends: 488 [2021-11-25 20:31:29,424 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 20:31:29,426 INFO L933 BasicCegarLoop]: 138 mSDtfsCounter, 30 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:29,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 188 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:29,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-11-25 20:31:29,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 468. [2021-11-25 20:31:29,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.3083511777301928) internal successors, (611), 467 states have internal predecessors, (611), 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 20:31:29,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 611 transitions. [2021-11-25 20:31:29,444 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 611 transitions. Word has length 142 [2021-11-25 20:31:29,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:29,444 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 611 transitions. [2021-11-25 20:31:29,444 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 20:31:29,445 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 611 transitions. [2021-11-25 20:31:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-25 20:31:29,449 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,450 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 20:31:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-11-25 20:31:29,451 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:29,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,451 INFO L85 PathProgramCache]: Analyzing trace with hash -229074350, now seen corresponding path program 1 times [2021-11-25 20:31:29,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437724972] [2021-11-25 20:31:29,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,546 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 20:31:29,546 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:29,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437724972] [2021-11-25 20:31:29,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437724972] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:29,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:29,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:29,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542347511] [2021-11-25 20:31:29,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:29,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:29,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:29,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:29,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:29,551 INFO L87 Difference]: Start difference. First operand 468 states and 611 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 20:31:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:29,707 INFO L93 Difference]: Finished difference Result 998 states and 1336 transitions. [2021-11-25 20:31:29,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:29,707 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 20:31:29,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:29,711 INFO L225 Difference]: With dead ends: 998 [2021-11-25 20:31:29,711 INFO L226 Difference]: Without dead ends: 532 [2021-11-25 20:31:29,712 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 20:31:29,712 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 15 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:29,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 203 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:29,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2021-11-25 20:31:29,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 518. [2021-11-25 20:31:29,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 518 states, 517 states have (on average 1.2901353965183753) internal successors, (667), 517 states have internal predecessors, (667), 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 20:31:29,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 518 states to 518 states and 667 transitions. [2021-11-25 20:31:29,728 INFO L78 Accepts]: Start accepts. Automaton has 518 states and 667 transitions. Word has length 147 [2021-11-25 20:31:29,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:29,728 INFO L470 AbstractCegarLoop]: Abstraction has 518 states and 667 transitions. [2021-11-25 20:31:29,729 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 20:31:29,729 INFO L276 IsEmpty]: Start isEmpty. Operand 518 states and 667 transitions. [2021-11-25 20:31:29,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-25 20:31:29,731 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,731 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, 1] [2021-11-25 20:31:29,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-11-25 20:31:29,732 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:29,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1633102544, now seen corresponding path program 1 times [2021-11-25 20:31:29,732 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:29,733 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029504614] [2021-11-25 20:31:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:29,733 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:29,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:29,804 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 20:31:29,805 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:29,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029504614] [2021-11-25 20:31:29,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029504614] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:29,807 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:29,807 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:29,807 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266236191] [2021-11-25 20:31:29,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:29,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:29,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:29,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:29,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:29,811 INFO L87 Difference]: Start difference. First operand 518 states and 667 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 20:31:29,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:29,967 INFO L93 Difference]: Finished difference Result 1142 states and 1517 transitions. [2021-11-25 20:31:29,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:29,968 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 152 [2021-11-25 20:31:29,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:29,972 INFO L225 Difference]: With dead ends: 1142 [2021-11-25 20:31:29,972 INFO L226 Difference]: Without dead ends: 624 [2021-11-25 20:31:29,973 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 20:31:29,973 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 124 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 97 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 20:31:29,974 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 97 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:29,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2021-11-25 20:31:29,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 612. [2021-11-25 20:31:29,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 612 states, 611 states have (on average 1.3436988543371522) internal successors, (821), 611 states have internal predecessors, (821), 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 20:31:29,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 612 states to 612 states and 821 transitions. [2021-11-25 20:31:29,996 INFO L78 Accepts]: Start accepts. Automaton has 612 states and 821 transitions. Word has length 152 [2021-11-25 20:31:29,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:29,996 INFO L470 AbstractCegarLoop]: Abstraction has 612 states and 821 transitions. [2021-11-25 20:31:29,996 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 20:31:29,996 INFO L276 IsEmpty]: Start isEmpty. Operand 612 states and 821 transitions. [2021-11-25 20:31:29,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-11-25 20:31:29,999 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:29,999 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 20:31:29,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-11-25 20:31:30,000 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:30,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:30,000 INFO L85 PathProgramCache]: Analyzing trace with hash -921761406, now seen corresponding path program 1 times [2021-11-25 20:31:30,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:30,000 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477058561] [2021-11-25 20:31:30,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:30,001 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:30,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:30,074 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 20:31:30,075 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:30,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477058561] [2021-11-25 20:31:30,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477058561] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:30,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:30,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:30,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181657582] [2021-11-25 20:31:30,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:30,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:30,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:30,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:30,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:30,077 INFO L87 Difference]: Start difference. First operand 612 states and 821 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 20:31:30,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:30,210 INFO L93 Difference]: Finished difference Result 1280 states and 1738 transitions. [2021-11-25 20:31:30,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:30,211 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 20:31:30,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:30,215 INFO L225 Difference]: With dead ends: 1280 [2021-11-25 20:31:30,215 INFO L226 Difference]: Without dead ends: 670 [2021-11-25 20:31:30,216 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 20:31:30,218 INFO L933 BasicCegarLoop]: 146 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:30,219 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 203 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:30,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 670 states. [2021-11-25 20:31:30,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 670 to 666. [2021-11-25 20:31:30,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 666 states, 665 states have (on average 1.324812030075188) internal successors, (881), 665 states have internal predecessors, (881), 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 20:31:30,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 666 states to 666 states and 881 transitions. [2021-11-25 20:31:30,258 INFO L78 Accepts]: Start accepts. Automaton has 666 states and 881 transitions. Word has length 169 [2021-11-25 20:31:30,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:30,258 INFO L470 AbstractCegarLoop]: Abstraction has 666 states and 881 transitions. [2021-11-25 20:31:30,258 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 20:31:30,258 INFO L276 IsEmpty]: Start isEmpty. Operand 666 states and 881 transitions. [2021-11-25 20:31:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2021-11-25 20:31:30,261 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:30,261 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 20:31:30,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-25 20:31:30,262 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:30,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:30,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1608509774, now seen corresponding path program 1 times [2021-11-25 20:31:30,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:30,262 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368368584] [2021-11-25 20:31:30,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:30,263 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:30,326 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 20:31:30,326 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:30,327 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368368584] [2021-11-25 20:31:30,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368368584] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:30,327 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:31:30,327 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:31:30,327 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614594401] [2021-11-25 20:31:30,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:30,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:31:30,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:30,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:31:30,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:31:30,329 INFO L87 Difference]: Start difference. First operand 666 states and 881 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 20:31:30,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:30,473 INFO L93 Difference]: Finished difference Result 1388 states and 1862 transitions. [2021-11-25 20:31:30,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:31:30,474 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 20:31:30,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:30,478 INFO L225 Difference]: With dead ends: 1388 [2021-11-25 20:31:30,478 INFO L226 Difference]: Without dead ends: 724 [2021-11-25 20:31:30,479 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 20:31:30,480 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 10 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 201 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 20:31:30,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 201 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:31:30,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-11-25 20:31:30,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 724. [2021-11-25 20:31:30,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 724 states, 723 states have (on average 1.3070539419087137) internal successors, (945), 723 states have internal predecessors, (945), 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 20:31:30,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 724 states to 724 states and 945 transitions. [2021-11-25 20:31:30,502 INFO L78 Accepts]: Start accepts. Automaton has 724 states and 945 transitions. Word has length 173 [2021-11-25 20:31:30,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:30,503 INFO L470 AbstractCegarLoop]: Abstraction has 724 states and 945 transitions. [2021-11-25 20:31:30,503 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 20:31:30,503 INFO L276 IsEmpty]: Start isEmpty. Operand 724 states and 945 transitions. [2021-11-25 20:31:30,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-25 20:31:30,506 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:30,507 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 20:31:30,507 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-11-25 20:31:30,507 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:30,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:30,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1881334288, now seen corresponding path program 1 times [2021-11-25 20:31:30,508 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:30,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004291897] [2021-11-25 20:31:30,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:30,508 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:30,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:30,573 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 303 proven. 25 refuted. 0 times theorem prover too weak. 138 trivial. 0 not checked. [2021-11-25 20:31:30,573 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004291897] [2021-11-25 20:31:30,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004291897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:30,574 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620771542] [2021-11-25 20:31:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:30,574 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:30,575 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:30,575 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:30,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-25 20:31:30,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:30,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 363 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:30,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:31,104 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 20:31:31,104 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-25 20:31:31,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620771542] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:31:31,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-25 20:31:31,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2021-11-25 20:31:31,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280340512] [2021-11-25 20:31:31,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:31:31,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-25 20:31:31,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:31:31,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-25 20:31:31,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:31,107 INFO L87 Difference]: Start difference. First operand 724 states and 945 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 20:31:31,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:31:31,318 INFO L93 Difference]: Finished difference Result 1570 states and 2107 transitions. [2021-11-25 20:31:31,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-25 20:31:31,318 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 20:31:31,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:31:31,323 INFO L225 Difference]: With dead ends: 1570 [2021-11-25 20:31:31,323 INFO L226 Difference]: Without dead ends: 768 [2021-11-25 20:31:31,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-25 20:31:31,326 INFO L933 BasicCegarLoop]: 147 mSDtfsCounter, 56 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 182 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-25 20:31:31,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 213 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 182 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-25 20:31:31,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-11-25 20:31:31,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 745. [2021-11-25 20:31:31,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 745 states, 744 states have (on average 1.2970430107526882) internal successors, (965), 744 states have internal predecessors, (965), 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 20:31:31,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 745 states to 745 states and 965 transitions. [2021-11-25 20:31:31,354 INFO L78 Accepts]: Start accepts. Automaton has 745 states and 965 transitions. Word has length 200 [2021-11-25 20:31:31,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:31:31,354 INFO L470 AbstractCegarLoop]: Abstraction has 745 states and 965 transitions. [2021-11-25 20:31:31,355 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 20:31:31,355 INFO L276 IsEmpty]: Start isEmpty. Operand 745 states and 965 transitions. [2021-11-25 20:31:31,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-25 20:31:31,358 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:31:31,358 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 20:31:31,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-25 20:31:31,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:31,573 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:31:31,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:31:31,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1310141955, now seen corresponding path program 1 times [2021-11-25 20:31:31,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:31:31,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447950778] [2021-11-25 20:31:31,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:31,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:31:31,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:31,640 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 20:31:31,640 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:31:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447950778] [2021-11-25 20:31:31,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447950778] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:31:31,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343837057] [2021-11-25 20:31:31,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:31:31,641 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:31:31,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:31:31,642 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:31:31,659 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-25 20:31:31,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:31:31,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-25 20:31:31,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:31:32,086 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 20:31:32,086 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:31:32,382 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 20:31:32,382 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343837057] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:31:32,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1479784853] [2021-11-25 20:31:32,405 INFO L159 IcfgInterpreter]: Started Sifa with 66 locations of interest [2021-11-25 20:31:32,405 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:31:32,410 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:31:32,415 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:31:32,415 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:32:17,168 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:32:37,269 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '18972#(and (<= |ULTIMATE.start_ssl3_accept_~buf~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~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) (<= |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert~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)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_#in~initial_state#1| 8464) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__hit~0#1|)) (<= |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 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1|)) (<= 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)) (= |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) (<= |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) (<= |ULTIMATE.start_ssl3_accept_~tmp___2~0#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) (<= 8464 |ULTIMATE.start_ssl3_accept_#in~initial_state#1|) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~buf~0#1| 2147483648)) (<= 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 20:32:37,269 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:32:37,269 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:32:37,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2021-11-25 20:32:37,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839264583] [2021-11-25 20:32:37,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:32:37,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-25 20:32:37,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:32:37,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-25 20:32:37,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=3477, Unknown=0, NotChecked=0, Total=4160 [2021-11-25 20:32:37,274 INFO L87 Difference]: Start difference. First operand 745 states and 965 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 20:32:37,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:32:37,800 INFO L93 Difference]: Finished difference Result 2555 states and 3463 transitions. [2021-11-25 20:32:37,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-25 20:32:37,801 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 20:32:37,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:32:37,810 INFO L225 Difference]: With dead ends: 2555 [2021-11-25 20:32:37,810 INFO L226 Difference]: Without dead ends: 1730 [2021-11-25 20:32:37,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 720 GetRequests, 652 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 20.1s TimeCoverageRelationStatistics Valid=695, Invalid=3727, Unknown=0, NotChecked=0, Total=4422 [2021-11-25 20:32:37,815 INFO L933 BasicCegarLoop]: 167 mSDtfsCounter, 393 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 475 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 20:32:37,815 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 475 Invalid, 523 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-25 20:32:37,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1730 states. [2021-11-25 20:32:37,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1730 to 1155. [2021-11-25 20:32:37,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1155 states, 1154 states have (on average 1.4098786828422878) internal successors, (1627), 1154 states have internal predecessors, (1627), 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 20:32:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1155 states to 1155 states and 1627 transitions. [2021-11-25 20:32:37,854 INFO L78 Accepts]: Start accepts. Automaton has 1155 states and 1627 transitions. Word has length 238 [2021-11-25 20:32:37,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:32:37,855 INFO L470 AbstractCegarLoop]: Abstraction has 1155 states and 1627 transitions. [2021-11-25 20:32:37,855 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 20:32:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 1155 states and 1627 transitions. [2021-11-25 20:32:37,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2021-11-25 20:32:37,859 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:32:37,860 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, 1] [2021-11-25 20:32:37,891 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-25 20:32:38,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-25 20:32:38,073 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:32:38,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:32:38,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1490401756, now seen corresponding path program 1 times [2021-11-25 20:32:38,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:32:38,074 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699918310] [2021-11-25 20:32:38,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:38,075 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:32:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:38,162 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 20:32:38,163 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:32:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699918310] [2021-11-25 20:32:38,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1699918310] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:32:38,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199536310] [2021-11-25 20:32:38,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:32:38,163 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:32:38,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:32:38,170 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:32:38,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-25 20:32:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:32:38,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 428 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-25 20:32:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:32:38,840 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 20:32:38,840 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:32:39,254 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 20:32:39,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199536310] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:32:39,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [3061632] [2021-11-25 20:32:39,265 INFO L159 IcfgInterpreter]: Started Sifa with 56 locations of interest [2021-11-25 20:32:39,265 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:32:39,265 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:32:39,266 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:32:39,266 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-25 20:33:14,467 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-25 20:33:32,556 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '24867#(and (<= |ULTIMATE.start_ssl3_accept_~buf~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483648)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__new_cipher~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) (<= |ULTIMATE.start_ssl3_accept_~s__info_callback~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~s__cert~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)) (<= |ULTIMATE.start_ssl3_accept_~s__s3__tmp__reuse_message~0#1| 2147483647) (<= |ULTIMATE.start_ssl3_accept_#in~initial_state#1| 8464) (<= 0 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__hit~0#1|)) (<= |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 (+ 2147483648 |ULTIMATE.start_ssl3_accept_~s__verify_mode~0#1|)) (<= 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)) (= |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) (<= |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) (<= |ULTIMATE.start_ssl3_accept_~tmp___2~0#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|) (<= 8464 |ULTIMATE.start_ssl3_accept_#in~initial_state#1|) (<= 0 (+ |ULTIMATE.start_ssl3_accept_~buf~0#1| 2147483648)) (<= 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 20:33:32,556 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-25 20:33:32,556 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-25 20:33:32,556 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2021-11-25 20:33:32,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159103865] [2021-11-25 20:33:32,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-25 20:33:32,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-25 20:33:32,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:32,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-25 20:33:32,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=436, Invalid=2756, Unknown=0, NotChecked=0, Total=3192 [2021-11-25 20:33:32,561 INFO L87 Difference]: Start difference. First operand 1155 states and 1627 transitions. Second operand has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 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 20:33:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:33,242 INFO L93 Difference]: Finished difference Result 3370 states and 4755 transitions. [2021-11-25 20:33:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-25 20:33:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 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 247 [2021-11-25 20:33:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:33,251 INFO L225 Difference]: With dead ends: 3370 [2021-11-25 20:33:33,252 INFO L226 Difference]: Without dead ends: 1567 [2021-11-25 20:33:33,257 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 752 GetRequests, 687 SyntacticMatches, 5 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 18.2s TimeCoverageRelationStatistics Valid=466, Invalid=3316, Unknown=0, NotChecked=0, Total=3782 [2021-11-25 20:33:33,258 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 372 mSDsluCounter, 356 mSDsCounter, 0 mSdLazyCounter, 865 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 372 SdHoareTripleChecker+Valid, 561 SdHoareTripleChecker+Invalid, 954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 865 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:33,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [372 Valid, 561 Invalid, 954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 865 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-25 20:33:33,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2021-11-25 20:33:33,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1386. [2021-11-25 20:33:33,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1386 states, 1385 states have (on average 1.376173285198556) internal successors, (1906), 1385 states have internal predecessors, (1906), 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 20:33:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1386 states to 1386 states and 1906 transitions. [2021-11-25 20:33:33,303 INFO L78 Accepts]: Start accepts. Automaton has 1386 states and 1906 transitions. Word has length 247 [2021-11-25 20:33:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 1386 states and 1906 transitions. [2021-11-25 20:33:33,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 31.875) internal successors, (255), 8 states have internal predecessors, (255), 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 20:33:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 1386 states and 1906 transitions. [2021-11-25 20:33:33,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 301 [2021-11-25 20:33:33,309 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:33,310 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 20:33:33,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-25 20:33:33,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-25 20:33:33,537 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:33,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1581750092, now seen corresponding path program 1 times [2021-11-25 20:33:33,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:33,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717465463] [2021-11-25 20:33:33,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:33,538 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:33,614 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 20:33:33,614 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:33,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717465463] [2021-11-25 20:33:33,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [717465463] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-25 20:33:33,615 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-25 20:33:33,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-25 20:33:33,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249679227] [2021-11-25 20:33:33,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-25 20:33:33,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-25 20:33:33,616 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-25 20:33:33,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-25 20:33:33,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-25 20:33:33,617 INFO L87 Difference]: Start difference. First operand 1386 states and 1906 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 20:33:33,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-25 20:33:33,766 INFO L93 Difference]: Finished difference Result 2940 states and 4100 transitions. [2021-11-25 20:33:33,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-25 20:33:33,766 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 20:33:33,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-25 20:33:33,775 INFO L225 Difference]: With dead ends: 2940 [2021-11-25 20:33:33,775 INFO L226 Difference]: Without dead ends: 1556 [2021-11-25 20:33:33,777 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 20:33:33,778 INFO L933 BasicCegarLoop]: 144 mSDtfsCounter, 8 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-25 20:33:33,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [8 Valid, 201 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-25 20:33:33,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1556 states. [2021-11-25 20:33:33,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1556 to 1546. [2021-11-25 20:33:33,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1546 states, 1545 states have (on average 1.3469255663430422) internal successors, (2081), 1545 states have internal predecessors, (2081), 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 20:33:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1546 states to 1546 states and 2081 transitions. [2021-11-25 20:33:33,851 INFO L78 Accepts]: Start accepts. Automaton has 1546 states and 2081 transitions. Word has length 300 [2021-11-25 20:33:33,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-25 20:33:33,851 INFO L470 AbstractCegarLoop]: Abstraction has 1546 states and 2081 transitions. [2021-11-25 20:33:33,852 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 20:33:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 1546 states and 2081 transitions. [2021-11-25 20:33:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2021-11-25 20:33:33,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-25 20:33:33,857 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 20:33:33,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-11-25 20:33:33,857 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-25 20:33:33,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-25 20:33:33,858 INFO L85 PathProgramCache]: Analyzing trace with hash 486259266, now seen corresponding path program 1 times [2021-11-25 20:33:33,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-25 20:33:33,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177779244] [2021-11-25 20:33:33,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:33,859 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-25 20:33:33,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:33,991 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 20:33:33,991 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-25 20:33:33,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177779244] [2021-11-25 20:33:33,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177779244] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-25 20:33:33,992 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308298079] [2021-11-25 20:33:33,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-25 20:33:33,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-25 20:33:33,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 [2021-11-25 20:33:33,993 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-25 20:33:34,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_72dc413a-a983-4006-8cb0-dbe6d119a46a/bin/utaipan-eEHZpOm5b7/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-25 20:33:34,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-25 20:33:34,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 548 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-25 20:33:34,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-25 20:33:34,626 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 20:33:34,626 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-25 20:33:35,736 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 20:33:35,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308298079] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-25 20:33:35,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1619469267] [2021-11-25 20:33:35,740 INFO L159 IcfgInterpreter]: Started Sifa with 74 locations of interest [2021-11-25 20:33:35,740 INFO L166 IcfgInterpreter]: Building call graph [2021-11-25 20:33:35,741 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-25 20:33:35,741 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-25 20:33:35,741 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs