./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.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_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c -s /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 a6fb0bd99900489be753a8775662d48a6e29966e ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 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 10:15:32,180 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 10:15:32,182 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 10:15:32,205 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 10:15:32,206 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 10:15:32,207 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 10:15:32,208 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 10:15:32,210 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 10:15:32,211 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 10:15:32,212 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 10:15:32,213 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 10:15:32,214 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 10:15:32,214 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 10:15:32,215 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 10:15:32,216 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 10:15:32,217 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 10:15:32,217 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 10:15:32,218 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 10:15:32,219 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 10:15:32,221 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 10:15:32,222 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 10:15:32,223 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 10:15:32,224 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 10:15:32,225 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 10:15:32,227 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 10:15:32,228 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 10:15:32,228 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 10:15:32,229 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 10:15:32,229 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 10:15:32,230 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 10:15:32,230 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 10:15:32,231 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 10:15:32,232 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 10:15:32,232 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 10:15:32,233 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 10:15:32,233 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 10:15:32,234 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 10:15:32,234 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 10:15:32,234 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 10:15:32,235 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 10:15:32,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 10:15:32,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2020-12-09 10:15:32,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 10:15:32,253 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 10:15:32,253 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 10:15:32,253 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 10:15:32,253 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 10:15:32,253 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 10:15:32,254 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 10:15:32,254 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 10:15:32,255 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 10:15:32,255 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 10:15:32,255 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 10:15:32,255 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 10:15:32,255 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 10:15:32,255 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-09 10:15:32,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 10:15:32,256 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 10:15:32,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 10:15:32,257 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 10:15:32,257 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_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a6fb0bd99900489be753a8775662d48a6e29966e [2020-12-09 10:15:32,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 10:15:32,444 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 10:15:32,446 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 10:15:32,446 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 10:15:32,447 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 10:15:32,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/../../sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2020-12-09 10:15:32,489 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/data/5ed4ceefa/ac550ad06f3a4776b67a2d96a5e5e615/FLAG878adff76 [2020-12-09 10:15:32,833 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 10:15:32,833 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c [2020-12-09 10:15:32,837 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/data/5ed4ceefa/ac550ad06f3a4776b67a2d96a5e5e615/FLAG878adff76 [2020-12-09 10:15:32,847 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/data/5ed4ceefa/ac550ad06f3a4776b67a2d96a5e5e615 [2020-12-09 10:15:32,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 10:15:32,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 10:15:32,851 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 10:15:32,851 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 10:15:32,853 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 10:15:32,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:32,855 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@472e1184 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32, skipping insertion in model container [2020-12-09 10:15:32,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:32,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 10:15:32,868 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 10:15:32,962 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_d022fba8-69ac-4e29-9e66-b7d3305a22ec/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c[450,463] [2020-12-09 10:15:32,965 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:15:32,971 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 10:15:32,981 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_d022fba8-69ac-4e29-9e66-b7d3305a22ec/sv-benchmarks/c/recursive-simple/id_i5_o5-2.c[450,463] [2020-12-09 10:15:32,982 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 10:15:32,991 INFO L208 MainTranslator]: Completed translation [2020-12-09 10:15:32,992 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32 WrapperNode [2020-12-09 10:15:32,992 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 10:15:32,993 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 10:15:32,993 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 10:15:32,993 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 10:15:33,001 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,007 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,021 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 10:15:33,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 10:15:33,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 10:15:33,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 10:15:33,028 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,028 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,029 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,029 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,031 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,032 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,033 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... [2020-12-09 10:15:33,034 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 10:15:33,035 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 10:15:33,035 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 10:15:33,035 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 10:15:33,036 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 10:15:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 10:15:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 10:15:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-12-09 10:15:33,094 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-12-09 10:15:33,094 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 10:15:33,246 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 10:15:33,246 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2020-12-09 10:15:33,249 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:15:33 BoogieIcfgContainer [2020-12-09 10:15:33,249 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 10:15:33,251 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 10:15:33,251 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 10:15:33,253 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 10:15:33,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 10:15:32" (1/3) ... [2020-12-09 10:15:33,254 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f90de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:15:33, skipping insertion in model container [2020-12-09 10:15:33,254 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 10:15:32" (2/3) ... [2020-12-09 10:15:33,255 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@41f90de9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 10:15:33, skipping insertion in model container [2020-12-09 10:15:33,255 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:15:33" (3/3) ... [2020-12-09 10:15:33,256 INFO L111 eAbstractionObserver]: Analyzing ICFG id_i5_o5-2.c [2020-12-09 10:15:33,266 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 10:15:33,268 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-09 10:15:33,276 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-12-09 10:15:33,296 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 10:15:33,296 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-09 10:15:33,296 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 10:15:33,297 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 10:15:33,297 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 10:15:33,297 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 10:15:33,297 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 10:15:33,297 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 10:15:33,307 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states. [2020-12-09 10:15:33,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-09 10:15:33,310 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:33,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:33,311 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:33,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2020-12-09 10:15:33,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:33,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678384798] [2020-12-09 10:15:33,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:33,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:33,447 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 10:15:33,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678384798] [2020-12-09 10:15:33,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:15:33,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 10:15:33,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782978916] [2020-12-09 10:15:33,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 10:15:33,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:33,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 10:15:33,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 10:15:33,463 INFO L87 Difference]: Start difference. First operand 14 states. Second operand 5 states. [2020-12-09 10:15:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:33,504 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2020-12-09 10:15:33,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 10:15:33,505 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2020-12-09 10:15:33,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:33,513 INFO L225 Difference]: With dead ends: 22 [2020-12-09 10:15:33,513 INFO L226 Difference]: Without dead ends: 14 [2020-12-09 10:15:33,515 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 10:15:33,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2020-12-09 10:15:33,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2020-12-09 10:15:33,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2020-12-09 10:15:33,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2020-12-09 10:15:33,548 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2020-12-09 10:15:33,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:33,548 INFO L481 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2020-12-09 10:15:33,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 10:15:33,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2020-12-09 10:15:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 10:15:33,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:33,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:33,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 10:15:33,550 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:33,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:33,551 INFO L82 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2020-12-09 10:15:33,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:33,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798988891] [2020-12-09 10:15:33,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:33,614 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 10:15:33,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798988891] [2020-12-09 10:15:33,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574835350] [2020-12-09 10:15:33,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:33,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 10:15:33,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:15:33,723 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 10:15:33,723 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:15:33,836 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 10:15:33,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [579473482] [2020-12-09 10:15:33,853 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 10:15:33,853 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:15:33,857 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 10:15:33,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:15:33,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 7] total 9 [2020-12-09 10:15:33,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135591753] [2020-12-09 10:15:33,859 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-09 10:15:33,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:33,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-09 10:15:33,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-12-09 10:15:33,860 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand 9 states. [2020-12-09 10:15:33,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:33,896 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-12-09 10:15:33,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 10:15:33,896 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-09 10:15:33,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:33,897 INFO L225 Difference]: With dead ends: 21 [2020-12-09 10:15:33,897 INFO L226 Difference]: Without dead ends: 17 [2020-12-09 10:15:33,898 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-09 10:15:33,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-12-09 10:15:33,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-12-09 10:15:33,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-12-09 10:15:33,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2020-12-09 10:15:33,903 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2020-12-09 10:15:33,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:33,903 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2020-12-09 10:15:33,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-09 10:15:33,904 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2020-12-09 10:15:33,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-09 10:15:33,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:33,905 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:34,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-12-09 10:15:34,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:34,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2020-12-09 10:15:34,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:34,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831175052] [2020-12-09 10:15:34,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:34,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:34,275 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 10:15:34,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831175052] [2020-12-09 10:15:34,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683048879] [2020-12-09 10:15:34,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-09 10:15:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:15:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-09 10:15:34,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:15:34,380 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-12-09 10:15:34,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:15:34,577 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-12-09 10:15:34,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [772521880] [2020-12-09 10:15:34,580 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 10:15:34,580 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:15:34,580 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 10:15:34,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:15:34,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 9] total 11 [2020-12-09 10:15:34,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323381057] [2020-12-09 10:15:34,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 10:15:34,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:34,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 10:15:34,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-12-09 10:15:34,582 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand 11 states. [2020-12-09 10:15:34,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:34,631 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2020-12-09 10:15:34,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 10:15:34,632 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 21 [2020-12-09 10:15:34,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:34,633 INFO L225 Difference]: With dead ends: 24 [2020-12-09 10:15:34,633 INFO L226 Difference]: Without dead ends: 20 [2020-12-09 10:15:34,634 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-09 10:15:34,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-12-09 10:15:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2020-12-09 10:15:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-12-09 10:15:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2020-12-09 10:15:34,638 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2020-12-09 10:15:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:34,638 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2020-12-09 10:15:34,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 10:15:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2020-12-09 10:15:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-09 10:15:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:34,639 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:34,840 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:15:34,841 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:34,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:34,842 INFO L82 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2020-12-09 10:15:34,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:34,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959207750] [2020-12-09 10:15:34,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:34,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:35,025 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 10:15:35,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959207750] [2020-12-09 10:15:35,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496424311] [2020-12-09 10:15:35,025 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:35,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-09 10:15:35,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:15:35,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-09 10:15:35,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:15:35,102 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 10:15:35,102 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:15:35,428 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 10:15:35,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1689997343] [2020-12-09 10:15:35,430 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 10:15:35,430 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:15:35,431 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 10:15:35,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:15:35,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 11] total 13 [2020-12-09 10:15:35,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000618290] [2020-12-09 10:15:35,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-09 10:15:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:35,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-09 10:15:35,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-09 10:15:35,432 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 13 states. [2020-12-09 10:15:35,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:35,492 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-12-09 10:15:35,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 10:15:35,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 27 [2020-12-09 10:15:35,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:35,494 INFO L225 Difference]: With dead ends: 27 [2020-12-09 10:15:35,494 INFO L226 Difference]: Without dead ends: 23 [2020-12-09 10:15:35,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-09 10:15:35,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-12-09 10:15:35,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-12-09 10:15:35,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-12-09 10:15:35,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-12-09 10:15:35,500 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2020-12-09 10:15:35,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:35,500 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-12-09 10:15:35,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-09 10:15:35,500 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-12-09 10:15:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-12-09 10:15:35,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:35,501 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:35,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:15:35,703 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:35,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:35,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2020-12-09 10:15:35,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:35,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867343352] [2020-12-09 10:15:35,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:35,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:35,794 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-09 10:15:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867343352] [2020-12-09 10:15:35,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794402841] [2020-12-09 10:15:35,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:35,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-09 10:15:35,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:15:35,880 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-12-09 10:15:35,880 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:15:36,388 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-12-09 10:15:36,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [186601546] [2020-12-09 10:15:36,390 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 10:15:36,390 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:15:36,390 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 10:15:36,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:15:36,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 13] total 14 [2020-12-09 10:15:36,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508713979] [2020-12-09 10:15:36,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-09 10:15:36,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:36,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-09 10:15:36,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2020-12-09 10:15:36,392 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 14 states. [2020-12-09 10:15:36,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:36,447 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-12-09 10:15:36,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-09 10:15:36,447 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 33 [2020-12-09 10:15:36,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:36,448 INFO L225 Difference]: With dead ends: 30 [2020-12-09 10:15:36,448 INFO L226 Difference]: Without dead ends: 26 [2020-12-09 10:15:36,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=222, Unknown=0, NotChecked=0, Total=342 [2020-12-09 10:15:36,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-12-09 10:15:36,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-12-09 10:15:36,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-12-09 10:15:36,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-12-09 10:15:36,452 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2020-12-09 10:15:36,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:36,452 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-12-09 10:15:36,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-09 10:15:36,452 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-12-09 10:15:36,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-12-09 10:15:36,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:36,453 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:36,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 10:15:36,654 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:36,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:36,654 INFO L82 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2020-12-09 10:15:36,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:36,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713744256] [2020-12-09 10:15:36,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:36,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:36,800 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 10:15:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713744256] [2020-12-09 10:15:36,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001600168] [2020-12-09 10:15:36,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/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 10:15:36,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-09 10:15:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-09 10:15:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-09 10:15:36,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 10:15:36,881 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 10:15:36,881 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 10:15:37,132 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 10:15:37,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [792456857] [2020-12-09 10:15:37,134 INFO L159 IcfgInterpreter]: Started Sifa with 12 locations of interest [2020-12-09 10:15:37,134 INFO L166 IcfgInterpreter]: Building call graph [2020-12-09 10:15:37,134 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 10:15:37,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-12-09 10:15:37,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 15 [2020-12-09 10:15:37,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349651004] [2020-12-09 10:15:37,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-09 10:15:37,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:37,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-09 10:15:37,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-09 10:15:37,136 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand 15 states. [2020-12-09 10:15:37,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:37,196 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2020-12-09 10:15:37,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-09 10:15:37,196 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 39 [2020-12-09 10:15:37,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:37,197 INFO L225 Difference]: With dead ends: 33 [2020-12-09 10:15:37,197 INFO L226 Difference]: Without dead ends: 29 [2020-12-09 10:15:37,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 73 SyntacticMatches, 5 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-12-09 10:15:37,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-12-09 10:15:37,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-12-09 10:15:37,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-12-09 10:15:37,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2020-12-09 10:15:37,201 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2020-12-09 10:15:37,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:37,202 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2020-12-09 10:15:37,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-09 10:15:37,202 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2020-12-09 10:15:37,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-12-09 10:15:37,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 10:15:37,203 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 10:15:37,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-12-09 10:15:37,404 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-09 10:15:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 10:15:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2020-12-09 10:15:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 10:15:37,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752166106] [2020-12-09 10:15:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 10:15:37,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 10:15:37,586 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 57 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-12-09 10:15:37,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752166106] [2020-12-09 10:15:37,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 10:15:37,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-12-09 10:15:37,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825300076] [2020-12-09 10:15:37,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-09 10:15:37,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 10:15:37,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-09 10:15:37,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-09 10:15:37,588 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand 11 states. [2020-12-09 10:15:37,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 10:15:37,646 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-12-09 10:15:37,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-09 10:15:37,647 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-12-09 10:15:37,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 10:15:37,647 INFO L225 Difference]: With dead ends: 29 [2020-12-09 10:15:37,648 INFO L226 Difference]: Without dead ends: 0 [2020-12-09 10:15:37,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-12-09 10:15:37,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-09 10:15:37,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-09 10:15:37,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-09 10:15:37,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-09 10:15:37,649 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 45 [2020-12-09 10:15:37,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 10:15:37,649 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-09 10:15:37,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-09 10:15:37,649 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-09 10:15:37,649 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-09 10:15:37,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 10:15:37,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-12-09 10:15:37,669 INFO L262 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-12-09 10:15:37,669 INFO L262 CegarLoopResult]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2020-12-09 10:15:37,669 INFO L262 CegarLoopResult]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 15) no Hoare annotation was computed. [2020-12-09 10:15:37,669 INFO L262 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-12-09 10:15:37,669 INFO L262 CegarLoopResult]: For program point L14(lines 14 16) no Hoare annotation was computed. [2020-12-09 10:15:37,670 INFO L258 CegarLoopResult]: At program point L13(line 13) the Hoare annotation is: (and (<= 5 ULTIMATE.start_main_~input~0) (<= ULTIMATE.start_main_~input~0 5)) [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point L13-1(line 13) no Hoare annotation was computed. [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point L11(lines 11 17) no Hoare annotation was computed. [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point idFINAL(lines 6 9) no Hoare annotation was computed. [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point idEXIT(lines 6 9) no Hoare annotation was computed. [2020-12-09 10:15:37,670 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 10:15:37,670 INFO L265 CegarLoopResult]: At program point idENTRY(lines 6 9) the Hoare annotation is: true [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point L7(line 7) no Hoare annotation was computed. [2020-12-09 10:15:37,670 INFO L262 CegarLoopResult]: For program point L8-1(line 8) no Hoare annotation was computed. [2020-12-09 10:15:37,674 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 10:15:37 BoogieIcfgContainer [2020-12-09 10:15:37,674 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 10:15:37,674 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 10:15:37,675 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 10:15:37,675 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 10:15:37,675 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 10:15:33" (3/4) ... [2020-12-09 10:15:37,678 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-09 10:15:37,683 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2020-12-09 10:15:37,687 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2020-12-09 10:15:37,687 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-09 10:15:37,687 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:15:37,687 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-09 10:15:37,716 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_d022fba8-69ac-4e29-9e66-b7d3305a22ec/bin/utaipan/witness.graphml [2020-12-09 10:15:37,716 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 10:15:37,717 INFO L168 Benchmark]: Toolchain (without parser) took 4866.90 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 89.3 MB in the beginning and 106.2 MB in the end (delta: -16.9 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,718 INFO L168 Benchmark]: CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 96.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:15:37,718 INFO L168 Benchmark]: CACSL2BoogieTranslator took 141.49 ms. Allocated memory is still 119.5 MB. Free memory was 89.1 MB in the beginning and 80.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.87 ms. Allocated memory is still 119.5 MB. Free memory was 79.9 MB in the beginning and 78.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,719 INFO L168 Benchmark]: Boogie Preprocessor took 12.13 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 77.8 MB in the end (delta: 818.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 10:15:37,720 INFO L168 Benchmark]: RCFGBuilder took 214.28 ms. Allocated memory is still 119.5 MB. Free memory was 77.6 MB in the beginning and 95.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,720 INFO L168 Benchmark]: TraceAbstraction took 4423.46 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 95.3 MB in the beginning and 109.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,720 INFO L168 Benchmark]: Witness Printer took 41.52 ms. Allocated memory is still 153.1 MB. Free memory was 109.3 MB in the beginning and 106.2 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 10:15:37,723 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16 ms. Allocated memory is still 119.5 MB. Free memory is still 96.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 141.49 ms. Allocated memory is still 119.5 MB. Free memory was 89.1 MB in the beginning and 80.0 MB in the end (delta: 9.1 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 28.87 ms. Allocated memory is still 119.5 MB. Free memory was 79.9 MB in the beginning and 78.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 12.13 ms. Allocated memory is still 119.5 MB. Free memory was 78.6 MB in the beginning and 77.8 MB in the end (delta: 818.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 214.28 ms. Allocated memory is still 119.5 MB. Free memory was 77.6 MB in the beginning and 95.8 MB in the end (delta: -18.2 MB). Peak memory consumption was 17.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4423.46 ms. Allocated memory was 119.5 MB in the beginning and 153.1 MB in the end (delta: 33.6 MB). Free memory was 95.3 MB in the beginning and 109.3 MB in the end (delta: -14.0 MB). Peak memory consumption was 18.9 MB. Max. memory is 16.1 GB. * Witness Printer took 41.52 ms. Allocated memory is still 153.1 MB. Free memory was 109.3 MB in the beginning and 106.2 MB in the end (delta: 3.1 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: 4.3s, OverallIterations: 7, TraceHistogramMax: 7, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 85 SDtfs, 130 SDslu, 414 SDs, 0 SdLazy, 305 SolverSat, 39 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 359 GetRequests, 266 SyntacticMatches, 7 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=29occurred in iteration=6, 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, 7 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 3 LocationsWithAnnotation, 5 PreInvPairs, 5 NumberOfFragments, 15 HoareAnnotationTreeSize, 5 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 3 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.2s InterpolantComputationTime, 324 NumberOfCodeBlocks, 324 NumberOfCodeBlocksAsserted, 20 NumberOfCheckSat, 442 ConstructedInterpolants, 0 QuantifiedInterpolants, 40360 SizeOfPredicates, 19 NumberOfNonLiveVariables, 470 ConjunctsInSsa, 63 ConjunctsInUnsatCore, 17 InterpolantComputations, 2 PerfectInterpolantSequences, 354/654 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...