./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan --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 029d85df21dda5501a92813bcb1234093dd4e34e ..................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 18:55:15,233 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 18:55:15,234 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 18:55:15,255 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 18:55:15,255 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 18:55:15,256 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 18:55:15,262 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 18:55:15,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 18:55:15,266 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 18:55:15,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 18:55:15,268 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 18:55:15,270 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 18:55:15,270 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 18:55:15,271 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 18:55:15,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 18:55:15,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 18:55:15,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 18:55:15,276 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 18:55:15,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 18:55:15,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 18:55:15,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 18:55:15,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 18:55:15,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 18:55:15,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 18:55:15,287 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 18:55:15,287 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 18:55:15,287 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 18:55:15,288 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 18:55:15,288 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 18:55:15,289 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 18:55:15,289 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 18:55:15,290 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 18:55:15,291 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 18:55:15,291 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 18:55:15,292 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 18:55:15,292 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 18:55:15,292 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 18:55:15,292 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 18:55:15,293 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 18:55:15,293 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 18:55:15,294 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 18:55:15,294 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 18:55:15,310 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 18:55:15,310 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 18:55:15,311 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 18:55:15,311 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 18:55:15,311 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 18:55:15,312 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 18:55:15,312 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 18:55:15,312 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 18:55:15,312 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 18:55:15,312 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 18:55:15,312 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 18:55:15,313 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 18:55:15,314 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:55:15,314 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 18:55:15,314 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 18:55:15,315 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 18:55:15,315 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 18:55:15,315 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 18:55:15,315 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 18:55:15,315 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-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 029d85df21dda5501a92813bcb1234093dd4e34e [2020-12-09 18:55:15,491 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 18:55:15,508 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 18:55:15,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 18:55:15,511 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 18:55:15,512 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 18:55:15,512 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-12-09 18:55:15,556 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/data/53e22ed1d/8ee21fa5733c460cb780b3b6bb7c2e0f/FLAGf7c7bf144 [2020-12-09 18:55:15,921 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 18:55:15,921 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2020-12-09 18:55:15,926 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/data/53e22ed1d/8ee21fa5733c460cb780b3b6bb7c2e0f/FLAGf7c7bf144 [2020-12-09 18:55:15,935 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/data/53e22ed1d/8ee21fa5733c460cb780b3b6bb7c2e0f [2020-12-09 18:55:15,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 18:55:15,938 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 18:55:15,939 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 18:55:15,939 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 18:55:15,941 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 18:55:15,942 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:55:15" (1/1) ... [2020-12-09 18:55:15,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41b3ef65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:15, skipping insertion in model container [2020-12-09 18:55:15,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 06:55:15" (1/1) ... [2020-12-09 18:55:15,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 18:55:15,957 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 18:55:16,049 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2020-12-09 18:55:16,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:55:16,058 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 18:55:16,068 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2020-12-09 18:55:16,068 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 18:55:16,079 INFO L208 MainTranslator]: Completed translation [2020-12-09 18:55:16,079 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16 WrapperNode [2020-12-09 18:55:16,080 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 18:55:16,080 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 18:55:16,081 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 18:55:16,081 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 18:55:16,086 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,102 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 18:55:16,102 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 18:55:16,102 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 18:55:16,103 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 18:55:16,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,113 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,114 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... [2020-12-09 18:55:16,115 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 18:55:16,115 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 18:55:16,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 18:55:16,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 18:55:16,116 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 18:55:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 18:55:16,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 18:55:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 18:55:16,176 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-09 18:55:16,176 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-09 18:55:16,177 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 18:55:16,312 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 18:55:16,312 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 18:55:16,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:55:16 BoogieIcfgContainer [2020-12-09 18:55:16,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 18:55:16,315 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 18:55:16,315 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 18:55:16,317 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 18:55:16,317 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 06:55:15" (1/3) ... [2020-12-09 18:55:16,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a37638e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:55:16, skipping insertion in model container [2020-12-09 18:55:16,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 06:55:16" (2/3) ... [2020-12-09 18:55:16,318 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a37638e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 06:55:16, skipping insertion in model container [2020-12-09 18:55:16,318 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:55:16" (3/3) ... [2020-12-09 18:55:16,320 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2020-12-09 18:55:16,329 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 18:55:16,332 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 18:55:16,339 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 18:55:16,355 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 18:55:16,355 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 18:55:16,355 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 18:55:16,355 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 18:55:16,355 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 18:55:16,356 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 18:55:16,356 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 18:55:16,356 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 18:55:16,365 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 18:55:16,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 18:55:16,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:16,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:16,378 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:16,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:16,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2020-12-09 18:55:16,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:16,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297112940] [2020-12-09 18:55:16,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 18:55:16,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297112940] [2020-12-09 18:55:16,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 18:55:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 18:55:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107015712] [2020-12-09 18:55:16,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 18:55:16,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 18:55:16,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 18:55:16,532 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-12-09 18:55:16,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:16,577 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 18:55:16,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 18:55:16,578 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 18:55:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:16,584 INFO L225 Difference]: With dead ends: 22 [2020-12-09 18:55:16,584 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 18:55:16,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-12-09 18:55:16,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 18:55:16,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 18:55:16,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 18:55:16,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 18:55:16,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-09 18:55:16,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:16,614 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 18:55:16,614 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 18:55:16,614 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 18:55:16,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 18:55:16,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:16,616 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:16,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 18:55:16,616 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:16,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:16,617 INFO L82 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2020-12-09 18:55:16,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:16,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068238549] [2020-12-09 18:55:16,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:16,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 18:55:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068238549] [2020-12-09 18:55:16,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382713935] [2020-12-09 18:55:16,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:16,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:16,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 18:55:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-12-09 18:55:16,822 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-09 18:55:16,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2133885681] [2020-12-09 18:55:16,950 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:16,950 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:16,954 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:16,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:16,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2020-12-09 18:55:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057192708] [2020-12-09 18:55:16,956 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-09 18:55:16,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:16,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-09 18:55:16,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-09 18:55:16,958 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 12 states. [2020-12-09 18:55:17,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:17,039 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2020-12-09 18:55:17,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 18:55:17,039 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-09 18:55:17,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:17,040 INFO L225 Difference]: With dead ends: 24 [2020-12-09 18:55:17,040 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 18:55:17,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-09 18:55:17,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 18:55:17,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 18:55:17,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 18:55:17,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 18:55:17,048 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 15 [2020-12-09 18:55:17,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:17,048 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 18:55:17,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-09 18:55:17,048 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 18:55:17,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 18:55:17,050 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:17,050 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:17,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 18:55:17,252 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:17,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:17,253 INFO L82 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 2 times [2020-12-09 18:55:17,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:17,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636884735] [2020-12-09 18:55:17,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:17,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:17,455 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 18:55:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636884735] [2020-12-09 18:55:17,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216850722] [2020-12-09 18:55:17,455 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:17,493 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-09 18:55:17,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:17,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 18:55:17,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 18:55:17,562 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:17,882 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-12-09 18:55:17,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [87180591] [2020-12-09 18:55:17,884 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:17,884 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:17,884 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:17,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:17,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2020-12-09 18:55:17,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38335365] [2020-12-09 18:55:17,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-09 18:55:17,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:17,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-09 18:55:17,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-09 18:55:17,886 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 16 states. [2020-12-09 18:55:17,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:17,988 INFO L93 Difference]: Finished difference Result 30 states and 32 transitions. [2020-12-09 18:55:17,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 18:55:17,988 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 27 [2020-12-09 18:55:17,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:17,989 INFO L225 Difference]: With dead ends: 30 [2020-12-09 18:55:17,989 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 18:55:17,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-12-09 18:55:17,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 18:55:17,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 18:55:17,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 18:55:17,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-09 18:55:17,993 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 27 [2020-12-09 18:55:17,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:17,994 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-09 18:55:17,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-09 18:55:17,994 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-09 18:55:17,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 18:55:17,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:17,995 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:18,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:18,197 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:18,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:18,198 INFO L82 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 3 times [2020-12-09 18:55:18,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:18,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049247298] [2020-12-09 18:55:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:18,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:18,326 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2020-12-09 18:55:18,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049247298] [2020-12-09 18:55:18,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930154465] [2020-12-09 18:55:18,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:18,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:55:18,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:18,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-09 18:55:18,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:18,427 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-12-09 18:55:18,427 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:19,171 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-12-09 18:55:19,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [670131857] [2020-12-09 18:55:19,173 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:19,173 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:19,174 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:19,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:19,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2020-12-09 18:55:19,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639564871] [2020-12-09 18:55:19,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-09 18:55:19,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:19,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-09 18:55:19,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-12-09 18:55:19,176 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 20 states. [2020-12-09 18:55:19,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:19,377 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-12-09 18:55:19,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 18:55:19,378 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 39 [2020-12-09 18:55:19,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:19,379 INFO L225 Difference]: With dead ends: 36 [2020-12-09 18:55:19,380 INFO L226 Difference]: Without dead ends: 32 [2020-12-09 18:55:19,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-09 18:55:19,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-12-09 18:55:19,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-12-09 18:55:19,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-12-09 18:55:19,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2020-12-09 18:55:19,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 39 [2020-12-09 18:55:19,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:19,387 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2020-12-09 18:55:19,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-09 18:55:19,387 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2020-12-09 18:55:19,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-12-09 18:55:19,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:19,389 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:19,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:19,590 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:19,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:19,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 4 times [2020-12-09 18:55:19,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:19,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114169835] [2020-12-09 18:55:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:19,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-12-09 18:55:19,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114169835] [2020-12-09 18:55:19,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988761164] [2020-12-09 18:55:19,740 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:19,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:19,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-09 18:55:19,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-12-09 18:55:19,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:21,233 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-12-09 18:55:21,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474340569] [2020-12-09 18:55:21,235 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:21,235 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:21,236 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:21,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:21,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2020-12-09 18:55:21,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258575926] [2020-12-09 18:55:21,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-09 18:55:21,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:21,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-09 18:55:21,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-12-09 18:55:21,238 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand 24 states. [2020-12-09 18:55:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:21,407 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2020-12-09 18:55:21,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-09 18:55:21,408 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 51 [2020-12-09 18:55:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:21,409 INFO L225 Difference]: With dead ends: 42 [2020-12-09 18:55:21,409 INFO L226 Difference]: Without dead ends: 38 [2020-12-09 18:55:21,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=346, Invalid=776, Unknown=0, NotChecked=0, Total=1122 [2020-12-09 18:55:21,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-09 18:55:21,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-09 18:55:21,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-09 18:55:21,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-12-09 18:55:21,417 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 51 [2020-12-09 18:55:21,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:21,417 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-12-09 18:55:21,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-09 18:55:21,418 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-12-09 18:55:21,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-12-09 18:55:21,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:21,419 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:21,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:21,620 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:21,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:21,621 INFO L82 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 5 times [2020-12-09 18:55:21,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:21,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714044622] [2020-12-09 18:55:21,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:21,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:21,781 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 143 refuted. 0 times theorem prover too weak. 109 trivial. 0 not checked. [2020-12-09 18:55:21,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714044622] [2020-12-09 18:55:21,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010449027] [2020-12-09 18:55:21,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:21,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-12-09 18:55:21,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:21,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-09 18:55:21,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:21,934 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-12-09 18:55:21,934 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-12-09 18:55:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1030996565] [2020-12-09 18:55:24,460 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:24,460 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:24,461 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:24,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:24,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2020-12-09 18:55:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335555162] [2020-12-09 18:55:24,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-12-09 18:55:24,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-12-09 18:55:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-12-09 18:55:24,463 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 28 states. [2020-12-09 18:55:24,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:24,700 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-12-09 18:55:24,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 18:55:24,701 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 63 [2020-12-09 18:55:24,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:24,702 INFO L225 Difference]: With dead ends: 48 [2020-12-09 18:55:24,702 INFO L226 Difference]: Without dead ends: 44 [2020-12-09 18:55:24,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=486, Invalid=1074, Unknown=0, NotChecked=0, Total=1560 [2020-12-09 18:55:24,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-12-09 18:55:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-12-09 18:55:24,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-09 18:55:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2020-12-09 18:55:24,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 63 [2020-12-09 18:55:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:24,708 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2020-12-09 18:55:24,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-12-09 18:55:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2020-12-09 18:55:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-12-09 18:55:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:24,709 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:24,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 18:55:24,910 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:24,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:24,911 INFO L82 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 6 times [2020-12-09 18:55:24,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:24,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992274329] [2020-12-09 18:55:24,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:25,090 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 208 refuted. 0 times theorem prover too weak. 166 trivial. 0 not checked. [2020-12-09 18:55:25,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992274329] [2020-12-09 18:55:25,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510926871] [2020-12-09 18:55:25,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:25,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:55:25,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:25,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-09 18:55:25,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-12-09 18:55:25,284 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:29,419 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-12-09 18:55:29,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [115394602] [2020-12-09 18:55:29,422 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:29,423 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:29,423 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:29,423 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:29,423 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2020-12-09 18:55:29,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870617875] [2020-12-09 18:55:29,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-12-09 18:55:29,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:29,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-12-09 18:55:29,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=748, Unknown=0, NotChecked=0, Total=992 [2020-12-09 18:55:29,425 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand 32 states. [2020-12-09 18:55:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:29,701 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2020-12-09 18:55:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 18:55:29,701 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 75 [2020-12-09 18:55:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:29,703 INFO L225 Difference]: With dead ends: 54 [2020-12-09 18:55:29,703 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 18:55:29,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=650, Invalid=1420, Unknown=0, NotChecked=0, Total=2070 [2020-12-09 18:55:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 18:55:29,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 18:55:29,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 18:55:29,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2020-12-09 18:55:29,708 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 75 [2020-12-09 18:55:29,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:29,708 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2020-12-09 18:55:29,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-12-09 18:55:29,708 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2020-12-09 18:55:29,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-12-09 18:55:29,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:29,710 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:29,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:29,911 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:29,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:29,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 7 times [2020-12-09 18:55:29,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:29,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535688309] [2020-12-09 18:55:29,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:29,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:30,140 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 285 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-12-09 18:55:30,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535688309] [2020-12-09 18:55:30,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971538066] [2020-12-09 18:55:30,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:30,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 30 conjunts are in the unsatisfiable core [2020-12-09 18:55:30,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:30,438 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-12-09 18:55:30,438 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2020-12-09 18:55:37,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [304900133] [2020-12-09 18:55:37,351 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:37,352 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:37,352 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:37,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:37,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2020-12-09 18:55:37,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489140711] [2020-12-09 18:55:37,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-12-09 18:55:37,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:37,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-12-09 18:55:37,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=310, Invalid=950, Unknown=0, NotChecked=0, Total=1260 [2020-12-09 18:55:37,354 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand 36 states. [2020-12-09 18:55:37,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:37,711 INFO L93 Difference]: Finished difference Result 60 states and 62 transitions. [2020-12-09 18:55:37,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-09 18:55:37,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 87 [2020-12-09 18:55:37,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:37,712 INFO L225 Difference]: With dead ends: 60 [2020-12-09 18:55:37,712 INFO L226 Difference]: Without dead ends: 56 [2020-12-09 18:55:37,713 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=838, Invalid=1814, Unknown=0, NotChecked=0, Total=2652 [2020-12-09 18:55:37,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-12-09 18:55:37,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2020-12-09 18:55:37,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 18:55:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2020-12-09 18:55:37,718 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 87 [2020-12-09 18:55:37,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:37,718 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2020-12-09 18:55:37,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-12-09 18:55:37,718 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2020-12-09 18:55:37,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-12-09 18:55:37,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:37,719 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:37,920 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:37,921 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:37,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:37,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 8 times [2020-12-09 18:55:37,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:37,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000521207] [2020-12-09 18:55:37,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 18:55:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000521207] [2020-12-09 18:55:38,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150814843] [2020-12-09 18:55:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:38,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-12-09 18:55:38,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:38,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 67 conjunts are in the unsatisfiable core [2020-12-09 18:55:38,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:38,963 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 18:55:38,963 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:40,337 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-12-09 18:55:40,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [603542001] [2020-12-09 18:55:40,339 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 18:55:40,339 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 18:55:40,339 FATAL L? ?]: Ignoring exception! java.lang.IllegalArgumentException: Recursive programs are not supported. at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.topsortRelevant(CallGraph.java:132) at de.uni_freiburg.informatik.ultimate.lib.sifa.CallGraph.(CallGraph.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.(IcfgInterpreter.java:92) at de.uni_freiburg.informatik.ultimate.plugins.sifa.SifaBuilder.construct(SifaBuilder.java:94) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:98) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:138) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:345) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-12-09 18:55:40,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 18:55:40,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 35 [2020-12-09 18:55:40,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544565639] [2020-12-09 18:55:40,340 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-12-09 18:55:40,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:40,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-12-09 18:55:40,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 18:55:40,341 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand 35 states. [2020-12-09 18:55:40,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:40,703 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2020-12-09 18:55:40,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-09 18:55:40,704 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 99 [2020-12-09 18:55:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:40,705 INFO L225 Difference]: With dead ends: 63 [2020-12-09 18:55:40,705 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 18:55:40,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 193 SyntacticMatches, 5 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-12-09 18:55:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 18:55:40,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-12-09 18:55:40,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 18:55:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2020-12-09 18:55:40,710 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2020-12-09 18:55:40,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:40,711 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2020-12-09 18:55:40,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-12-09 18:55:40,711 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2020-12-09 18:55:40,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-12-09 18:55:40,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 18:55:40,712 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 18:55:40,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-09 18:55:40,913 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 18:55:40,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 18:55:40,913 INFO L82 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 9 times [2020-12-09 18:55:40,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 18:55:40,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259320721] [2020-12-09 18:55:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 18:55:40,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 18:55:41,137 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 345 proven. 78 refuted. 0 times theorem prover too weak. 361 trivial. 0 not checked. [2020-12-09 18:55:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259320721] [2020-12-09 18:55:41,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124837032] [2020-12-09 18:55:41,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:41,450 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 18:55:41,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 18:55:41,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 36 conjunts are in the unsatisfiable core [2020-12-09 18:55:41,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 18:55:41,578 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-12-09 18:55:41,578 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 18:55:55,611 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 256 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2020-12-09 18:55:55,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2020-12-09 18:55:55,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22, 37] total 41 [2020-12-09 18:55:55,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374371514] [2020-12-09 18:55:55,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-09 18:55:55,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 18:55:55,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-09 18:55:55,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=1252, Unknown=0, NotChecked=0, Total=1640 [2020-12-09 18:55:55,614 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand 21 states. [2020-12-09 18:55:55,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 18:55:55,833 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-12-09 18:55:55,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-09 18:55:55,834 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 105 [2020-12-09 18:55:55,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 18:55:55,834 INFO L225 Difference]: With dead ends: 59 [2020-12-09 18:55:55,834 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 18:55:55,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 610 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1018, Invalid=2288, Unknown=0, NotChecked=0, Total=3306 [2020-12-09 18:55:55,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 18:55:55,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 18:55:55,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 18:55:55,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 18:55:55,836 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2020-12-09 18:55:55,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 18:55:55,836 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 18:55:55,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-09 18:55:55,836 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 18:55:55,836 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 18:55:56,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 18:55:56,042 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L258 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (= 15 ULTIMATE.start_main_~input~0) [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-12-09 18:55:56,116 INFO L262 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-12-09 18:55:56,117 INFO L258 CegarLoopResult]: At program point L8(line 8) the Hoare annotation is: (and (<= id_~x |id_#in~x|) (<= |id_#in~x| id_~x)) [2020-12-09 18:55:56,117 INFO L265 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-12-09 18:55:56,117 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-09 18:55:56,117 INFO L262 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-12-09 18:55:56,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 06:55:56 BoogieIcfgContainer [2020-12-09 18:55:56,120 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 18:55:56,120 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 18:55:56,120 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 18:55:56,120 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 18:55:56,120 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 06:55:16" (3/4) ... [2020-12-09 18:55:56,122 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 18:55:56,126 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-09 18:55:56,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 18:55:56,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 18:55:56,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:55:56,129 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 18:55:56,149 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_52c273f3-70f6-43e9-8efe-18cc2fd7c573/bin/utaipan/witness.graphml [2020-12-09 18:55:56,150 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 18:55:56,151 INFO L168 Benchmark]: Toolchain (without parser) took 40212.24 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 76.3 MB in the beginning and 106.0 MB in the end (delta: -29.7 MB). Peak memory consumption was 90.5 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,151 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 73.4 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:55:56,151 INFO L168 Benchmark]: CACSL2BoogieTranslator took 140.77 ms. Allocated memory is still 104.9 MB. Free memory was 76.1 MB in the beginning and 66.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,151 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 65.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,152 INFO L168 Benchmark]: Boogie Preprocessor took 12.59 ms. Allocated memory is still 104.9 MB. Free memory was 65.5 MB in the beginning and 64.7 MB in the end (delta: 844.1 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 18:55:56,152 INFO L168 Benchmark]: RCFGBuilder took 198.37 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 52.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,152 INFO L168 Benchmark]: TraceAbstraction took 39804.88 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 51.7 MB in the beginning and 108.1 MB in the end (delta: -56.4 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,153 INFO L168 Benchmark]: Witness Printer took 29.63 ms. Allocated memory is still 224.4 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 18:55:56,154 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 73.4 MB. Free memory was 39.7 MB in the beginning and 39.7 MB in the end (delta: 56.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 140.77 ms. Allocated memory is still 104.9 MB. Free memory was 76.1 MB in the beginning and 66.9 MB in the end (delta: 9.2 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 21.45 ms. Allocated memory is still 104.9 MB. Free memory was 66.8 MB in the beginning and 65.5 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.59 ms. Allocated memory is still 104.9 MB. Free memory was 65.5 MB in the beginning and 64.7 MB in the end (delta: 844.1 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 198.37 ms. Allocated memory is still 104.9 MB. Free memory was 64.6 MB in the beginning and 52.2 MB in the end (delta: 12.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 39804.88 ms. Allocated memory was 104.9 MB in the beginning and 224.4 MB in the end (delta: 119.5 MB). Free memory was 51.7 MB in the beginning and 108.1 MB in the end (delta: -56.4 MB). Peak memory consumption was 63.2 MB. Max. memory is 16.1 GB. * Witness Printer took 29.63 ms. Allocated memory is still 224.4 MB. Free memory was 108.1 MB in the beginning and 106.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 15]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.6s, OverallIterations: 10, TraceHistogramMax: 17, AutomataDifference: 2.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 152 SDtfs, 768 SDslu, 1652 SDs, 0 SdLazy, 1297 SolverSat, 378 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1402 GetRequests, 1078 SyntacticMatches, 7 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 3.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 11 HoareAnnotationTreeSize, 5 FomulaSimplifications, 14 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 7 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 33.8s InterpolantComputationTime, 1131 NumberOfCodeBlocks, 1131 NumberOfCodeBlocksAsserted, 49 NumberOfCheckSat, 1664 ConstructedInterpolants, 0 QuantifiedInterpolants, 408466 SizeOfPredicates, 82 NumberOfNonLiveVariables, 1588 ConjunctsInSsa, 229 ConjunctsInUnsatCore, 28 InterpolantComputations, 2 PerfectInterpolantSequences, 4628/8664 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...