./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 635dfa2a Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d .............................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-02 01:42:13,423 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:42:13,424 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:42:13,430 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:42:13,430 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:42:13,431 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:42:13,432 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:42:13,433 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:42:13,433 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:42:13,434 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:42:13,434 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:42:13,434 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:42:13,435 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:42:13,435 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:42:13,436 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:42:13,436 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:42:13,437 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:42:13,438 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:42:13,439 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:42:13,439 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:42:13,440 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:42:13,441 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:42:13,442 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:42:13,442 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:42:13,442 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:42:13,443 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:42:13,443 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:42:13,444 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:42:13,444 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:42:13,445 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:42:13,445 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:42:13,445 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:42:13,445 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:42:13,445 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:42:13,446 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:42:13,446 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:42:13,447 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-02 01:42:13,454 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:42:13,454 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:42:13,455 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 01:42:13,455 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 01:42:13,455 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 01:42:13,456 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-02 01:42:13,456 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 01:42:13,457 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:42:13,457 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:42:13,458 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-02 01:42:13,458 INFO L133 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/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(__VERIFIER_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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-12-02 01:42:13,476 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:42:13,485 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:42:13,488 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:42:13,489 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:42:13,489 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:42:13,489 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-02 01:42:13,525 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/a816ad1c8/3cbd120ef5644e5eae16dbf74ad294b6/FLAGb1857d260 [2018-12-02 01:42:13,834 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:42:13,834 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-02 01:42:13,842 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/a816ad1c8/3cbd120ef5644e5eae16dbf74ad294b6/FLAGb1857d260 [2018-12-02 01:42:13,849 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/a816ad1c8/3cbd120ef5644e5eae16dbf74ad294b6 [2018-12-02 01:42:13,851 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:42:13,852 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:42:13,852 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:42:13,852 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:42:13,854 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:42:13,855 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:13" (1/1) ... [2018-12-02 01:42:13,856 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@58dfd927 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:13, skipping insertion in model container [2018-12-02 01:42:13,856 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:13" (1/1) ... [2018-12-02 01:42:13,860 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:42:13,879 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:42:14,035 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:42:14,042 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:42:14,100 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:42:14,129 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:42:14,129 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14 WrapperNode [2018-12-02 01:42:14,130 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:42:14,130 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:42:14,130 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:42:14,130 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:42:14,135 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,144 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:42:14,156 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:42:14,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:42:14,157 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:42:14,162 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,162 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,164 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,168 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,170 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,171 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... [2018-12-02 01:42:14,173 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:42:14,173 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:42:14,173 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:42:14,173 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:42:14,174 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/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 [2018-12-02 01:42:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-02 01:42:14,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-02 01:42:14,208 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-02 01:42:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:42:14,209 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:42:14,209 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-02 01:42:14,366 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:42:14,366 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 01:42:14,366 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:14 BoogieIcfgContainer [2018-12-02 01:42:14,366 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:42:14,367 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:42:14,367 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:42:14,369 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:42:14,369 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:42:13" (1/3) ... [2018-12-02 01:42:14,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:14, skipping insertion in model container [2018-12-02 01:42:14,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:14" (2/3) ... [2018-12-02 01:42:14,370 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a537d7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:14, skipping insertion in model container [2018-12-02 01:42:14,370 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:14" (3/3) ... [2018-12-02 01:42:14,371 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,390 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,391 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,392 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,393 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,393 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,393 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:14,398 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-02 01:42:14,399 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:42:14,404 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 01:42:14,413 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 01:42:14,429 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:42:14,429 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 01:42:14,429 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:42:14,429 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:42:14,429 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:42:14,429 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:42:14,429 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:42:14,430 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:42:14,437 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-02 01:42:14,478 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-02 01:42:14,481 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-02 01:42:14,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 01:42:14,488 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:14,489 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:14,491 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:14,494 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:14,495 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-02 01:42:14,496 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:42:14,531 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,531 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:14,532 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,532 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:42:14,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:14,638 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:14,638 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:42:14,638 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:42:14,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:42:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:42:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:42:14,651 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-02 01:42:14,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:14,717 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-02 01:42:14,717 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:42:14,718 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 01:42:14,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:14,728 INFO L225 Difference]: With dead ends: 1411 [2018-12-02 01:42:14,728 INFO L226 Difference]: Without dead ends: 322 [2018-12-02 01:42:14,729 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:14,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-02 01:42:14,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-02 01:42:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-02 01:42:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-02 01:42:14,765 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-02 01:42:14,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:14,765 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-02 01:42:14,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:42:14,765 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-02 01:42:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 01:42:14,766 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:14,767 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:14,767 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:14,767 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:14,767 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-02 01:42:14,767 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:42:14,771 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:14,772 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,772 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:42:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:14,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:14,825 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:14,825 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:42:14,825 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:42:14,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:42:14,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:42:14,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:42:14,827 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-02 01:42:14,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:14,853 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-02 01:42:14,853 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:42:14,854 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 01:42:14,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:14,855 INFO L225 Difference]: With dead ends: 411 [2018-12-02 01:42:14,855 INFO L226 Difference]: Without dead ends: 290 [2018-12-02 01:42:14,855 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:14,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-02 01:42:14,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-02 01:42:14,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-02 01:42:14,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-02 01:42:14,863 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-02 01:42:14,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:14,863 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-02 01:42:14,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:42:14,863 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-02 01:42:14,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 01:42:14,864 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:14,864 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:14,864 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:14,864 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:14,864 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-02 01:42:14,864 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:42:14,866 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,867 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:14,867 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,867 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:42:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:14,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:14,910 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:14,910 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 01:42:14,910 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:42:14,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:42:14,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:42:14,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:14,911 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-02 01:42:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:14,957 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-02 01:42:14,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:42:14,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 01:42:14,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:14,959 INFO L225 Difference]: With dead ends: 437 [2018-12-02 01:42:14,959 INFO L226 Difference]: Without dead ends: 309 [2018-12-02 01:42:14,959 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 01:42:14,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-02 01:42:14,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-02 01:42:14,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-02 01:42:14,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-02 01:42:14,966 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-02 01:42:14,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:14,967 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-02 01:42:14,967 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:42:14,967 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-02 01:42:14,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 01:42:14,968 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:14,968 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:14,968 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:14,968 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:14,968 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-02 01:42:14,968 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:42:14,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:14,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:14,971 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:42:14,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:15,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:15,012 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:15,012 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 01:42:15,012 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-02 01:42:15,012 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:42:15,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:42:15,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:15,013 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-02 01:42:15,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:15,052 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-02 01:42:15,052 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:42:15,052 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 01:42:15,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:15,054 INFO L225 Difference]: With dead ends: 456 [2018-12-02 01:42:15,054 INFO L226 Difference]: Without dead ends: 319 [2018-12-02 01:42:15,054 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2018-12-02 01:42:15,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-02 01:42:15,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-02 01:42:15,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 01:42:15,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-02 01:42:15,061 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-02 01:42:15,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:15,061 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-02 01:42:15,061 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:42:15,061 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-02 01:42:15,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 01:42:15,062 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:15,063 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:15,063 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:15,063 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:15,063 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-02 01:42:15,063 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-02 01:42:15,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:15,065 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:42:15,065 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-02 01:42:15,065 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-02 01:42:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:15,104 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:15,104 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-02 01:42:15,105 FATAL L292 ToolchainWalker]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.handleInfeasibleCase(BaseRefinementStrategy.java:296) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.executeStrategy(BaseRefinementStrategy.java:206) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:70) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:456) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:434) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:376) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:334) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:174) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:132) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) 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:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarAbsIntRunner.generateFixpoints(CegarAbsIntRunner.java:169) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.constructInterpolantGenerator(BaseTaipanRefinementStrategy.java:379) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseTaipanRefinementStrategy.getInterpolantGenerator(BaseTaipanRefinementStrategy.java:224) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:380) ... 20 more [2018-12-02 01:42:15,108 INFO L168 Benchmark]: Toolchain (without parser) took 1256.43 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 954.9 MB in the beginning and 974.0 MB in the end (delta: -19.0 MB). Peak memory consumption was 125.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:42:15,109 INFO L168 Benchmark]: CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:42:15,109 INFO L168 Benchmark]: CACSL2BoogieTranslator took 277.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 954.9 MB in the beginning and 1.1 GB in the end (delta: -163.2 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. [2018-12-02 01:42:15,110 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:42:15,110 INFO L168 Benchmark]: Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:42:15,110 INFO L168 Benchmark]: RCFGBuilder took 193.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. [2018-12-02 01:42:15,111 INFO L168 Benchmark]: TraceAbstraction took 740.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 974.0 MB in the end (delta: 118.9 MB). Peak memory consumption was 118.9 MB. Max. memory is 11.5 GB. [2018-12-02 01:42:15,113 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.14 ms. Allocated memory is still 1.0 GB. Free memory is still 982.3 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 277.49 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 954.9 MB in the beginning and 1.1 GB in the end (delta: -163.2 MB). Peak memory consumption was 30.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.15 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.32 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 193.44 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.3 MB). Peak memory consumption was 25.3 MB. Max. memory is 11.5 GB. * TraceAbstraction took 740.40 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 974.0 MB in the end (delta: 118.9 MB). Peak memory consumption was 118.9 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.UnsupportedOperationException: AbsInt only supports BoogieIcfgLocations and Codeblocks at the moment: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.BaseRefinementStrategy.extractInterpolants(BaseRefinementStrategy.java:391) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.1.23-635dfa2 [2018-12-02 01:42:16,420 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-02 01:42:16,421 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-02 01:42:16,427 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-02 01:42:16,427 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-02 01:42:16,428 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-02 01:42:16,428 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-02 01:42:16,429 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-02 01:42:16,430 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-02 01:42:16,430 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-02 01:42:16,431 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-02 01:42:16,431 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-02 01:42:16,431 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-02 01:42:16,432 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-02 01:42:16,432 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-02 01:42:16,432 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-02 01:42:16,433 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-02 01:42:16,434 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-02 01:42:16,435 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-02 01:42:16,435 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-02 01:42:16,436 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-02 01:42:16,436 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-02 01:42:16,437 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-02 01:42:16,438 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-02 01:42:16,438 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-02 01:42:16,438 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-02 01:42:16,439 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-02 01:42:16,439 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-02 01:42:16,439 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-02 01:42:16,440 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-02 01:42:16,440 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-02 01:42:16,440 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-02 01:42:16,440 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-02 01:42:16,441 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-02 01:42:16,441 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-02 01:42:16,441 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-02 01:42:16,441 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-02 01:42:16,449 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-02 01:42:16,449 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-02 01:42:16,449 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-02 01:42:16,449 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-02 01:42:16,449 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-02 01:42:16,450 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-02 01:42:16,450 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-02 01:42:16,450 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-02 01:42:16,450 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-02 01:42:16,450 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-02 01:42:16,450 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-02 01:42:16,450 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-02 01:42:16,451 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-02 01:42:16,451 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-02 01:42:16,452 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-02 01:42:16,452 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-02 01:42:16,453 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-02 01:42:16,453 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true 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/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/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(__VERIFIER_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 -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-12-02 01:42:16,472 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-02 01:42:16,480 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-02 01:42:16,483 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-02 01:42:16,484 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-02 01:42:16,484 INFO L276 PluginConnector]: CDTParser initialized [2018-12-02 01:42:16,484 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-02 01:42:16,522 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/ea64a0bb1/7fc27c0b3f984609a3ce31178f1465b4/FLAG15b6a3b50 [2018-12-02 01:42:16,875 INFO L307 CDTParser]: Found 1 translation units. [2018-12-02 01:42:16,876 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-12-02 01:42:16,883 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/ea64a0bb1/7fc27c0b3f984609a3ce31178f1465b4/FLAG15b6a3b50 [2018-12-02 01:42:16,890 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/data/ea64a0bb1/7fc27c0b3f984609a3ce31178f1465b4 [2018-12-02 01:42:16,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-02 01:42:16,893 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-02 01:42:16,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-02 01:42:16,894 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-02 01:42:16,896 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-02 01:42:16,896 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:16" (1/1) ... [2018-12-02 01:42:16,898 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a4eb40d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:16, skipping insertion in model container [2018-12-02 01:42:16,898 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.12 01:42:16" (1/1) ... [2018-12-02 01:42:16,902 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-02 01:42:16,921 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-02 01:42:17,092 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:42:17,101 INFO L191 MainTranslator]: Completed pre-run [2018-12-02 01:42:17,162 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-02 01:42:17,193 INFO L195 MainTranslator]: Completed translation [2018-12-02 01:42:17,193 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17 WrapperNode [2018-12-02 01:42:17,193 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-02 01:42:17,194 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-02 01:42:17,194 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-02 01:42:17,194 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-02 01:42:17,199 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,208 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-02 01:42:17,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-02 01:42:17,220 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-02 01:42:17,220 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-02 01:42:17,225 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,225 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,231 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,233 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,234 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... [2018-12-02 01:42:17,236 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-02 01:42:17,236 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-02 01:42:17,236 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-02 01:42:17,236 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-02 01:42:17,237 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/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 [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-02 01:42:17,274 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-02 01:42:17,274 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-02 01:42:17,274 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-02 01:42:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-02 01:42:17,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-02 01:42:17,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-02 01:42:17,276 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-02 01:42:17,433 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-02 01:42:17,433 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-02 01:42:17,433 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:17 BoogieIcfgContainer [2018-12-02 01:42:17,434 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-02 01:42:17,434 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-02 01:42:17,434 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-02 01:42:17,436 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-02 01:42:17,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.12 01:42:16" (1/3) ... [2018-12-02 01:42:17,436 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b513583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:17, skipping insertion in model container [2018-12-02 01:42:17,436 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.12 01:42:17" (2/3) ... [2018-12-02 01:42:17,437 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b513583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.12 01:42:17, skipping insertion in model container [2018-12-02 01:42:17,437 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:17" (3/3) ... [2018-12-02 01:42:17,438 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-12-02 01:42:17,455 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,455 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,455 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,456 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,457 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,457 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,457 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,457 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,457 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,458 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,459 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-02 01:42:17,465 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-02 01:42:17,465 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-02 01:42:17,470 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-02 01:42:17,478 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-02 01:42:17,492 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-02 01:42:17,492 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-02 01:42:17,492 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-02 01:42:17,492 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-02 01:42:17,492 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-02 01:42:17,492 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-02 01:42:17,492 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-02 01:42:17,493 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-02 01:42:17,493 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-02 01:42:17,497 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-02 01:42:17,527 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-02 01:42:17,528 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-02 01:42:17,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-02 01:42:17,534 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:17,534 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:17,535 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:17,539 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:17,539 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-02 01:42:17,542 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:17,542 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:17,561 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:17,608 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:17,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:17,647 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:42:17,650 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:17,650 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:42:17,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:42:17,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:42:17,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:42:17,662 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-02 01:42:17,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:17,749 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2018-12-02 01:42:17,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:42:17,750 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-02 01:42:17,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:17,760 INFO L225 Difference]: With dead ends: 1777 [2018-12-02 01:42:17,761 INFO L226 Difference]: Without dead ends: 499 [2018-12-02 01:42:17,762 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2018-12-02 01:42:17,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-12-02 01:42:17,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2018-12-02 01:42:17,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-12-02 01:42:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2018-12-02 01:42:17,800 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2018-12-02 01:42:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:17,800 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2018-12-02 01:42:17,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:42:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2018-12-02 01:42:17,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 01:42:17,801 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:17,801 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:17,801 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:17,802 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:17,802 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-02 01:42:17,802 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:17,802 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:17,818 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:17,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:17,848 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:17,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:17,872 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:42:17,873 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:17,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:42:17,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:42:17,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:42:17,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:42:17,875 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2018-12-02 01:42:17,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:17,919 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2018-12-02 01:42:17,919 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:42:17,919 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 01:42:17,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:17,921 INFO L225 Difference]: With dead ends: 464 [2018-12-02 01:42:17,921 INFO L226 Difference]: Without dead ends: 343 [2018-12-02 01:42:17,921 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:17,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-02 01:42:17,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2018-12-02 01:42:17,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 01:42:17,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2018-12-02 01:42:17,931 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2018-12-02 01:42:17,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:17,931 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2018-12-02 01:42:17,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:42:17,931 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2018-12-02 01:42:17,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-02 01:42:17,932 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:17,932 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:17,932 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:17,932 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:17,932 INFO L82 PathProgramCache]: Analyzing trace with hash 676041288, now seen corresponding path program 1 times [2018-12-02 01:42:17,932 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:17,933 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:17,950 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:17,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:17,981 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:18,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,006 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:42:18,007 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:18,007 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-02 01:42:18,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-02 01:42:18,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-02 01:42:18,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-02 01:42:18,008 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2018-12-02 01:42:18,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:18,055 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2018-12-02 01:42:18,056 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-02 01:42:18,056 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-02 01:42:18,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:18,057 INFO L225 Difference]: With dead ends: 420 [2018-12-02 01:42:18,057 INFO L226 Difference]: Without dead ends: 290 [2018-12-02 01:42:18,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:18,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-02 01:42:18,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-02 01:42:18,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-02 01:42:18,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-02 01:42:18,067 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-02 01:42:18,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:18,067 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-02 01:42:18,067 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-02 01:42:18,067 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-02 01:42:18,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 01:42:18,068 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:18,068 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:18,069 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:18,069 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:18,069 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-02 01:42:18,069 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:18,069 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:18,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:18,130 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:18,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,164 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:42:18,165 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:18,165 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 01:42:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:42:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:42:18,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:18,166 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-02 01:42:18,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:18,246 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-02 01:42:18,247 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:42:18,247 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 01:42:18,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:18,248 INFO L225 Difference]: With dead ends: 437 [2018-12-02 01:42:18,248 INFO L226 Difference]: Without dead ends: 309 [2018-12-02 01:42:18,249 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-02 01:42:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-02 01:42:18,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-02 01:42:18,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-02 01:42:18,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-02 01:42:18,257 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-02 01:42:18,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:18,257 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-02 01:42:18,257 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:42:18,257 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-02 01:42:18,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-02 01:42:18,258 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:18,258 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:18,259 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:18,259 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:18,259 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-02 01:42:18,259 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:18,259 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:18,276 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 01:42:18,310 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-02 01:42:18,310 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:18,312 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:18,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,336 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-02 01:42:18,337 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-02 01:42:18,337 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-02 01:42:18,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-02 01:42:18,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-02 01:42:18,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-02 01:42:18,338 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-02 01:42:18,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:18,394 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-02 01:42:18,394 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-02 01:42:18,394 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-02 01:42:18,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:18,395 INFO L225 Difference]: With dead ends: 456 [2018-12-02 01:42:18,395 INFO L226 Difference]: Without dead ends: 319 [2018-12-02 01:42:18,396 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2018-12-02 01:42:18,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-02 01:42:18,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-02 01:42:18,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-02 01:42:18,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-02 01:42:18,401 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-02 01:42:18,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:18,401 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-02 01:42:18,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-02 01:42:18,401 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-02 01:42:18,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 01:42:18,402 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:18,402 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:18,402 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:18,402 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:18,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-02 01:42:18,402 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:18,403 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:18,419 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:42:18,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:18,458 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:18,492 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,492 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:18,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,587 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:18,587 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:18,597 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:18,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:18,611 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:18,615 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,615 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:18,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:18,648 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:18,648 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-02 01:42:18,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 01:42:18,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 01:42:18,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-02 01:42:18,649 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 11 states. [2018-12-02 01:42:19,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:19,070 INFO L93 Difference]: Finished difference Result 760 states and 1850 transitions. [2018-12-02 01:42:19,070 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-02 01:42:19,070 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-02 01:42:19,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:19,072 INFO L225 Difference]: With dead ends: 760 [2018-12-02 01:42:19,072 INFO L226 Difference]: Without dead ends: 383 [2018-12-02 01:42:19,072 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-12-02 01:42:19,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-02 01:42:19,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 351. [2018-12-02 01:42:19,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-02 01:42:19,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-02 01:42:19,080 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-02 01:42:19,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:19,081 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-02 01:42:19,081 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 01:42:19,081 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-02 01:42:19,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-02 01:42:19,082 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:19,082 INFO L402 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:19,082 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:19,082 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:19,083 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-02 01:42:19,083 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:19,083 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:19,099 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:19,136 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:19,168 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:19,168 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:19,273 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:19,274 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:19,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:19,293 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:19,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:19,295 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:19,316 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:19,316 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-02 01:42:19,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-02 01:42:19,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-02 01:42:19,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-02 01:42:19,316 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 11 states. [2018-12-02 01:42:19,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:19,742 INFO L93 Difference]: Finished difference Result 824 states and 1978 transitions. [2018-12-02 01:42:19,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-02 01:42:19,743 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-02 01:42:19,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:19,744 INFO L225 Difference]: With dead ends: 824 [2018-12-02 01:42:19,744 INFO L226 Difference]: Without dead ends: 447 [2018-12-02 01:42:19,744 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-12-02 01:42:19,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-02 01:42:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-02 01:42:19,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-02 01:42:19,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-02 01:42:19,749 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 29 [2018-12-02 01:42:19,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:19,750 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-02 01:42:19,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-02 01:42:19,750 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-02 01:42:19,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-02 01:42:19,750 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:19,750 INFO L402 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:19,751 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:19,751 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -956668217, now seen corresponding path program 1 times [2018-12-02 01:42:19,751 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:19,751 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:19,768 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:19,821 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:19,879 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:19,879 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:20,145 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:20,149 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:20,149 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:20,161 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:42:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:42:20,192 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:20,198 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:20,198 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:20,231 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:20,246 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:20,246 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-02 01:42:20,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-02 01:42:20,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-02 01:42:20,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-02 01:42:20,247 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 17 states. [2018-12-02 01:42:21,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:21,796 INFO L93 Difference]: Finished difference Result 1302 states and 3081 transitions. [2018-12-02 01:42:21,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-02 01:42:21,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-12-02 01:42:21,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:21,802 INFO L225 Difference]: With dead ends: 1302 [2018-12-02 01:42:21,803 INFO L226 Difference]: Without dead ends: 643 [2018-12-02 01:42:21,804 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2018-12-02 01:42:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-02 01:42:21,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 447. [2018-12-02 01:42:21,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-02 01:42:21,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-02 01:42:21,819 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 45 [2018-12-02 01:42:21,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:21,820 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-02 01:42:21,820 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-02 01:42:21,820 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-02 01:42:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-02 01:42:21,822 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:21,822 INFO L402 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:21,822 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:21,823 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:21,823 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 2 times [2018-12-02 01:42:21,823 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:21,823 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:21,850 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-02 01:42:21,924 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 01:42:21,924 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:21,926 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:22,024 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:22,764 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:22,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:22,767 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:22,775 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-02 01:42:22,798 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-02 01:42:22,798 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:22,801 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:22,807 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:22,807 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:22,839 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:22,839 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2018-12-02 01:42:22,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-02 01:42:22,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-02 01:42:22,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2018-12-02 01:42:22,840 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 25 states. [2018-12-02 01:42:23,314 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-02 01:42:25,065 WARN L180 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 01:42:25,300 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-02 01:42:25,531 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-02 01:42:25,773 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-02 01:42:26,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:26,874 INFO L93 Difference]: Finished difference Result 1718 states and 4109 transitions. [2018-12-02 01:42:26,874 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-12-02 01:42:26,875 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-12-02 01:42:26,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:26,876 INFO L225 Difference]: With dead ends: 1718 [2018-12-02 01:42:26,876 INFO L226 Difference]: Without dead ends: 767 [2018-12-02 01:42:26,877 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=758, Invalid=2434, Unknown=0, NotChecked=0, Total=3192 [2018-12-02 01:42:26,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-12-02 01:42:26,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-12-02 01:42:26,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-12-02 01:42:26,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-12-02 01:42:26,886 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 57 [2018-12-02 01:42:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:26,886 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-12-02 01:42:26,886 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-02 01:42:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-12-02 01:42:26,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-02 01:42:26,887 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:26,887 INFO L402 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:26,887 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:26,888 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:26,888 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 3 times [2018-12-02 01:42:26,888 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:26,888 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:26,903 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-02 01:42:26,995 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 01:42:26,995 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:27,006 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:27,122 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:27,922 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:27,925 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:27,925 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:27,932 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-02 01:42:27,979 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-02 01:42:27,980 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:27,982 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:27,991 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:28,017 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:42:28,035 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:28,035 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17] total 31 [2018-12-02 01:42:28,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-02 01:42:28,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-02 01:42:28,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2018-12-02 01:42:28,036 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 31 states. [2018-12-02 01:42:28,705 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-02 01:42:29,037 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-02 01:42:29,357 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-02 01:42:29,693 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 01:42:29,990 WARN L180 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-02 01:42:30,615 WARN L180 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-02 01:42:31,234 WARN L180 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-02 01:42:31,831 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-02 01:42:32,377 WARN L180 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-02 01:42:34,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:34,743 INFO L93 Difference]: Finished difference Result 2360 states and 5540 transitions. [2018-12-02 01:42:34,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-12-02 01:42:34,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-12-02 01:42:34,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:34,746 INFO L225 Difference]: With dead ends: 2360 [2018-12-02 01:42:34,746 INFO L226 Difference]: Without dead ends: 1139 [2018-12-02 01:42:34,747 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2018-12-02 01:42:34,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2018-12-02 01:42:34,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 671. [2018-12-02 01:42:34,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-12-02 01:42:34,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-12-02 01:42:34,756 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-12-02 01:42:34,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:34,756 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-12-02 01:42:34,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-02 01:42:34,756 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-12-02 01:42:34,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-12-02 01:42:34,757 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:34,757 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:34,757 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:34,758 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:34,758 INFO L82 PathProgramCache]: Analyzing trace with hash 831344650, now seen corresponding path program 4 times [2018-12-02 01:42:34,758 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:34,758 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:34,773 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:42:34,912 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:42:34,912 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:34,915 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:35,212 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:35,212 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:37,200 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:37,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:42:37,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:42:37,209 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-02 01:42:37,252 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-02 01:42:37,252 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:37,257 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:37,267 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:37,267 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:42:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:37,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:42:37,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27] total 51 [2018-12-02 01:42:37,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-12-02 01:42:37,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-12-02 01:42:37,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2018-12-02 01:42:37,326 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 51 states. [2018-12-02 01:42:37,785 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2018-12-02 01:42:38,112 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 14 [2018-12-02 01:42:38,995 WARN L180 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 18 [2018-12-02 01:42:39,720 WARN L180 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-12-02 01:42:40,555 WARN L180 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-12-02 01:42:41,327 WARN L180 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-12-02 01:42:42,086 WARN L180 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-12-02 01:42:42,865 WARN L180 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-02 01:42:43,575 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-02 01:42:44,295 WARN L180 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-02 01:42:44,984 WARN L180 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-02 01:42:45,665 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-02 01:42:46,311 WARN L180 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-02 01:42:46,947 WARN L180 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-02 01:42:47,512 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 01:42:51,517 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-12-02 01:42:52,103 WARN L180 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-12-02 01:42:52,680 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-12-02 01:42:53,257 WARN L180 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-02 01:42:53,771 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-02 01:42:54,287 WARN L180 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-02 01:42:54,761 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-02 01:42:55,216 WARN L180 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-02 01:42:55,662 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-02 01:42:57,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:42:57,544 INFO L93 Difference]: Finished difference Result 3134 states and 7235 transitions. [2018-12-02 01:42:57,545 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-12-02 01:42:57,545 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 113 [2018-12-02 01:42:57,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:42:57,547 INFO L225 Difference]: With dead ends: 3134 [2018-12-02 01:42:57,547 INFO L226 Difference]: Without dead ends: 1679 [2018-12-02 01:42:57,549 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 21.1s TimeCoverageRelationStatistics Valid=2576, Invalid=10306, Unknown=0, NotChecked=0, Total=12882 [2018-12-02 01:42:57,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2018-12-02 01:42:57,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1295. [2018-12-02 01:42:57,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-12-02 01:42:57,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2724 transitions. [2018-12-02 01:42:57,559 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2724 transitions. Word has length 113 [2018-12-02 01:42:57,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:42:57,560 INFO L480 AbstractCegarLoop]: Abstraction has 1295 states and 2724 transitions. [2018-12-02 01:42:57,560 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-12-02 01:42:57,560 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2724 transitions. [2018-12-02 01:42:57,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-12-02 01:42:57,561 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:42:57,561 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:42:57,561 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:42:57,561 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:42:57,561 INFO L82 PathProgramCache]: Analyzing trace with hash 739295879, now seen corresponding path program 5 times [2018-12-02 01:42:57,562 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:42:57,562 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:42:57,577 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-02 01:42:57,759 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-12-02 01:42:57,759 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:42:57,762 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:42:58,108 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:42:58,108 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:43:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:43:00,688 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:43:00,688 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:43:00,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-12-02 01:43:00,786 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-12-02 01:43:00,786 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:43:00,791 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:43:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:43:00,801 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:43:00,868 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-02 01:43:00,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:43:00,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30] total 57 [2018-12-02 01:43:00,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-12-02 01:43:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-12-02 01:43:00,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2018-12-02 01:43:00,886 INFO L87 Difference]: Start difference. First operand 1295 states and 2724 transitions. Second operand 57 states. [2018-12-02 01:43:02,873 WARN L180 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-02 01:43:03,542 WARN L180 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-02 01:43:04,197 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-02 01:43:04,850 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-02 01:43:05,474 WARN L180 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-02 01:43:06,087 WARN L180 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-12-02 01:43:06,769 WARN L180 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-12-02 01:43:07,378 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-02 01:43:07,999 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-12-02 01:43:08,551 WARN L180 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 01:43:09,141 WARN L180 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-12-02 01:43:10,225 WARN L180 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-12-02 01:43:11,307 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-12-02 01:43:12,297 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-12-02 01:43:13,172 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-12-02 01:43:16,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:43:16,914 INFO L93 Difference]: Finished difference Result 3230 states and 7427 transitions. [2018-12-02 01:43:16,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-12-02 01:43:16,915 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 125 [2018-12-02 01:43:16,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:43:16,920 INFO L225 Difference]: With dead ends: 3230 [2018-12-02 01:43:16,920 INFO L226 Difference]: Without dead ends: 1775 [2018-12-02 01:43:16,923 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=2465, Invalid=10875, Unknown=0, NotChecked=0, Total=13340 [2018-12-02 01:43:16,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-12-02 01:43:16,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 927. [2018-12-02 01:43:16,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-12-02 01:43:16,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-12-02 01:43:16,934 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 125 [2018-12-02 01:43:16,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:43:16,934 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-12-02 01:43:16,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-12-02 01:43:16,934 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-12-02 01:43:16,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-12-02 01:43:16,936 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:43:16,936 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:43:16,936 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:43:16,936 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:43:16,936 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 6 times [2018-12-02 01:43:16,937 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:43:16,937 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:43:16,960 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-12-02 01:43:17,287 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-02 01:43:17,287 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:43:17,305 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:43:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:43:18,054 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:43:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:43:23,515 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:43:23,515 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:43:23,522 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-12-02 01:43:23,739 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-12-02 01:43:23,739 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-02 01:43:23,747 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:43:23,765 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:43:23,765 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:43:23,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:43:23,841 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:43:23,841 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44, 44] total 85 [2018-12-02 01:43:23,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-12-02 01:43:23,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-12-02 01:43:23,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=6550, Unknown=0, NotChecked=0, Total=7140 [2018-12-02 01:43:23,843 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 85 states. [2018-12-02 01:43:25,008 WARN L180 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 9 [2018-12-02 01:43:25,846 WARN L180 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 12 [2018-12-02 01:43:28,065 WARN L180 SmtUtils]: Spent 850.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 16 [2018-12-02 01:43:30,246 WARN L180 SmtUtils]: Spent 836.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 16 [2018-12-02 01:43:32,502 WARN L180 SmtUtils]: Spent 789.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 16 [2018-12-02 01:43:34,862 WARN L180 SmtUtils]: Spent 758.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 16 [2018-12-02 01:43:36,985 WARN L180 SmtUtils]: Spent 586.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 16 [2018-12-02 01:43:39,247 WARN L180 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 16 [2018-12-02 01:43:41,578 WARN L180 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 16 [2018-12-02 01:43:43,850 WARN L180 SmtUtils]: Spent 624.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 16 [2018-12-02 01:43:46,042 WARN L180 SmtUtils]: Spent 569.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 16 [2018-12-02 01:43:48,386 WARN L180 SmtUtils]: Spent 546.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 16 [2018-12-02 01:43:50,552 WARN L180 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 16 [2018-12-02 01:43:52,747 WARN L180 SmtUtils]: Spent 491.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 16 [2018-12-02 01:43:54,833 WARN L180 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 16 [2018-12-02 01:43:56,850 WARN L180 SmtUtils]: Spent 396.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 16 [2018-12-02 01:43:58,845 WARN L180 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 16 [2018-12-02 01:44:00,862 WARN L180 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 16 [2018-12-02 01:44:02,893 WARN L180 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 16 [2018-12-02 01:44:04,914 WARN L180 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 16 [2018-12-02 01:44:06,776 WARN L180 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-12-02 01:44:08,609 WARN L180 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-12-02 01:44:10,380 WARN L180 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-12-02 01:44:12,114 WARN L180 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-12-02 01:44:13,708 WARN L180 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-02 01:44:15,232 WARN L180 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-02 01:44:16,701 WARN L180 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-02 01:44:18,175 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-02 01:44:19,529 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-02 01:44:20,841 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-02 01:44:22,067 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-02 01:44:23,148 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-02 01:44:24,189 WARN L180 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-02 01:44:30,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:44:30,090 INFO L93 Difference]: Finished difference Result 1698 states and 3579 transitions. [2018-12-02 01:44:30,091 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-12-02 01:44:30,091 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 177 [2018-12-02 01:44:30,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:44:30,096 INFO L225 Difference]: With dead ends: 1698 [2018-12-02 01:44:30,096 INFO L226 Difference]: Without dead ends: 1567 [2018-12-02 01:44:30,101 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4879 ImplicationChecksByTransitivity, 68.6s TimeCoverageRelationStatistics Valid=4180, Invalid=23210, Unknown=0, NotChecked=0, Total=27390 [2018-12-02 01:44:30,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2018-12-02 01:44:30,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1567. [2018-12-02 01:44:30,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2018-12-02 01:44:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3268 transitions. [2018-12-02 01:44:30,122 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3268 transitions. Word has length 177 [2018-12-02 01:44:30,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:44:30,122 INFO L480 AbstractCegarLoop]: Abstraction has 1567 states and 3268 transitions. [2018-12-02 01:44:30,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-12-02 01:44:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3268 transitions. [2018-12-02 01:44:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-12-02 01:44:30,125 INFO L394 BasicCegarLoop]: Found error trace [2018-12-02 01:44:30,125 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-02 01:44:30,126 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-02 01:44:30,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-02 01:44:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 301327693, now seen corresponding path program 7 times [2018-12-02 01:44:30,126 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-02 01:44:30,126 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/cvc4 Starting monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2018-12-02 01:44:30,142 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-02 01:44:30,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:44:30,397 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:44:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:44:31,111 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:44:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:44:37,272 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-02 01:44:37,272 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-12-02 01:44:37,279 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-02 01:44:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-02 01:44:37,339 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-02 01:44:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:44:37,362 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-02 01:44:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-02 01:44:37,409 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-02 01:44:37,409 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43] total 84 [2018-12-02 01:44:37,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-12-02 01:44:37,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-12-02 01:44:37,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6366, Unknown=0, NotChecked=0, Total=6972 [2018-12-02 01:44:37,410 INFO L87 Difference]: Start difference. First operand 1567 states and 3268 transitions. Second operand 84 states. [2018-12-02 01:44:40,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-02 01:44:40,399 INFO L93 Difference]: Finished difference Result 13655 states and 26972 transitions. [2018-12-02 01:44:40,400 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-12-02 01:44:40,400 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 181 [2018-12-02 01:44:40,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-02 01:44:40,400 INFO L225 Difference]: With dead ends: 13655 [2018-12-02 01:44:40,400 INFO L226 Difference]: Without dead ends: 0 [2018-12-02 01:44:40,401 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1626, Invalid=13626, Unknown=0, NotChecked=0, Total=15252 [2018-12-02 01:44:40,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-12-02 01:44:40,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-12-02 01:44:40,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-12-02 01:44:40,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-12-02 01:44:40,401 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2018-12-02 01:44:40,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-02 01:44:40,401 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-12-02 01:44:40,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-12-02 01:44:40,401 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-12-02 01:44:40,401 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-12-02 01:44:40,403 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-02 01:44:40,404 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 02.12 01:44:40 BasicIcfg [2018-12-02 01:44:40,404 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-02 01:44:40,405 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-02 01:44:40,405 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-02 01:44:40,405 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-02 01:44:40,405 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.12 01:42:17" (3/4) ... [2018-12-02 01:44:40,407 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-12-02 01:44:40,411 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-12-02 01:44:40,411 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-12-02 01:44:40,413 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-12-02 01:44:40,413 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-12-02 01:44:40,413 INFO L905 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-12-02 01:44:40,434 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_b6ec5c33-7a64-4c39-8ae0-e2f6a1841060/bin-2019/utaipan/witness.graphml [2018-12-02 01:44:40,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-02 01:44:40,435 INFO L168 Benchmark]: Toolchain (without parser) took 143542.42 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 211.3 MB). Free memory was 938.0 MB in the beginning and 788.9 MB in the end (delta: 149.1 MB). Peak memory consumption was 360.4 MB. Max. memory is 11.5 GB. [2018-12-02 01:44:40,435 INFO L168 Benchmark]: CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:44:40,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 300.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -179.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:44:40,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.64 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:44:40,436 INFO L168 Benchmark]: Boogie Preprocessor took 16.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-02 01:44:40,436 INFO L168 Benchmark]: RCFGBuilder took 197.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. [2018-12-02 01:44:40,436 INFO L168 Benchmark]: TraceAbstraction took 142970.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 794.6 MB in the end (delta: 297.8 MB). Peak memory consumption was 364.4 MB. Max. memory is 11.5 GB. [2018-12-02 01:44:40,437 INFO L168 Benchmark]: Witness Printer took 29.86 ms. Allocated memory is still 1.2 GB. Free memory was 794.6 MB in the beginning and 788.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 11.5 GB. [2018-12-02 01:44:40,438 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13 ms. Allocated memory is still 1.0 GB. Free memory is still 972.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 300.04 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 144.7 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -179.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 25.64 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 16.42 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 197.39 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 1.1 GB in the end (delta: 25.4 MB). Peak memory consumption was 25.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 142970.30 ms. Allocated memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 66.6 MB). Free memory was 1.1 GB in the beginning and 794.6 MB in the end (delta: 297.8 MB). Peak memory consumption was 364.4 MB. Max. memory is 11.5 GB. * Witness Printer took 29.86 ms. Allocated memory is still 1.2 GB. Free memory was 794.6 MB in the beginning and 788.9 MB in the end (delta: 5.7 MB). Peak memory consumption was 5.7 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 142.9s OverallTime, 14 OverallIterations, 21 TraceHistogramMax, 119.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1851 SDtfs, 18722 SDslu, 46714 SDs, 0 SdLazy, 10991 SolverSat, 2691 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3775 GetRequests, 3038 SyntacticMatches, 3 SemanticMatches, 734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12474 ImplicationChecksByTransitivity, 129.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1567occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 2074 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 21.2s InterpolantComputationTime, 1763 NumberOfCodeBlocks, 1763 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 3372 ConstructedInterpolants, 0 QuantifiedInterpolants, 2784124 SizeOfPredicates, 400 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 48/16584 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...