./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer_false-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_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.1.23-635dfa2 [2018-12-09 02:10:46,224 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 02:10:46,224 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 02:10:46,233 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 02:10:46,233 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 02:10:46,234 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 02:10:46,234 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 02:10:46,235 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 02:10:46,236 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 02:10:46,236 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 02:10:46,237 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 02:10:46,237 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 02:10:46,237 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 02:10:46,238 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 02:10:46,238 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 02:10:46,239 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 02:10:46,239 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 02:10:46,240 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 02:10:46,241 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 02:10:46,241 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 02:10:46,242 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 02:10:46,242 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 02:10:46,244 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 02:10:46,244 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 02:10:46,244 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 02:10:46,244 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 02:10:46,245 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 02:10:46,245 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 02:10:46,246 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 02:10:46,246 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 02:10:46,246 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 02:10:46,247 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 02:10:46,247 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 02:10:46,247 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 02:10:46,247 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 02:10:46,248 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 02:10:46,248 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-12-09 02:10:46,255 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 02:10:46,255 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 02:10:46,255 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 02:10:46,255 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 02:10:46,256 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-12-09 02:10:46,256 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-12-09 02:10:46,257 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 02:10:46,257 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 02:10:46,257 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 02:10:46,257 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-12-09 02:10:46,257 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 02:10:46,257 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 02:10:46,258 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 02:10:46,258 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 02:10:46,259 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 02:10:46,259 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-12-09 02:10:46,260 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 02:10:46,260 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-12-09 02:10:46,260 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-12-09 02:10:46,260 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_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-12-09 02:10:46,277 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 02:10:46,284 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 02:10:46,286 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 02:10:46,286 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 02:10:46,287 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 02:10:46,287 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-09 02:10:46,321 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/2c72413fd/e13690f3dd2545ababad4208981bc44d/FLAG52b093fe1 [2018-12-09 02:10:46,719 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 02:10:46,720 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-09 02:10:46,727 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/2c72413fd/e13690f3dd2545ababad4208981bc44d/FLAG52b093fe1 [2018-12-09 02:10:46,736 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/2c72413fd/e13690f3dd2545ababad4208981bc44d [2018-12-09 02:10:46,738 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 02:10:46,738 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 02:10:46,739 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 02:10:46,739 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 02:10:46,741 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 02:10:46,742 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:46" (1/1) ... [2018-12-09 02:10:46,743 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 09.12 02:10:46, skipping insertion in model container [2018-12-09 02:10:46,743 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:46" (1/1) ... [2018-12-09 02:10:46,747 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 02:10:46,767 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 02:10:46,924 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:10:46,930 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 02:10:46,990 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:10:47,019 INFO L195 MainTranslator]: Completed translation [2018-12-09 02:10:47,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47 WrapperNode [2018-12-09 02:10:47,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 02:10:47,020 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 02:10:47,021 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 02:10:47,021 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 02:10:47,026 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,034 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,047 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 02:10:47,047 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 02:10:47,047 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 02:10:47,047 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 02:10:47,053 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,053 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,054 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,054 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,057 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,060 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,061 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... [2018-12-09 02:10:47,062 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 02:10:47,063 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 02:10:47,063 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 02:10:47,063 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 02:10:47,063 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:47,106 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-09 02:10:47,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-09 02:10:47,107 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 02:10:47,107 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-09 02:10:47,108 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 02:10:47,108 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 02:10:47,109 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-09 02:10:47,268 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 02:10:47,269 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-09 02:10:47,269 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:47 BoogieIcfgContainer [2018-12-09 02:10:47,269 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 02:10:47,269 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 02:10:47,269 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 02:10:47,271 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 02:10:47,271 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:10:46" (1/3) ... [2018-12-09 02:10:47,272 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 09.12 02:10:47, skipping insertion in model container [2018-12-09 02:10:47,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:47" (2/3) ... [2018-12-09 02:10:47,272 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 09.12 02:10:47, skipping insertion in model container [2018-12-09 02:10:47,272 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:47" (3/3) ... [2018-12-09 02:10:47,273 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-12-09 02:10:47,297 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,297 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,297 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,298 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,298 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,298 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,298 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,299 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,300 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,300 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,300 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,300 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,300 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,301 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,301 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,301 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,301 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,301 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,302 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,302 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,302 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,302 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,302 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:47,310 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-09 02:10:47,310 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 02:10:47,315 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 02:10:47,325 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 02:10:47,341 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 02:10:47,341 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 02:10:47,342 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 02:10:47,342 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 02:10:47,342 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 02:10:47,342 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 02:10:47,342 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 02:10:47,342 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 02:10:47,349 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-09 02:10:47,390 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-09 02:10:47,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-09 02:10:47,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 02:10:47,399 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:47,400 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:10:47,402 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:47,406 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:47,407 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-09 02:10:47,409 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 02:10:47,444 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,445 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:47,445 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,445 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 02:10:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:47,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:47,553 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:47,553 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 02:10:47,553 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 02:10:47,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 02:10:47,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 02:10:47,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 02:10:47,566 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-09 02:10:47,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:47,641 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-12-09 02:10:47,641 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:10:47,642 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-09 02:10:47,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:47,651 INFO L225 Difference]: With dead ends: 1411 [2018-12-09 02:10:47,651 INFO L226 Difference]: Without dead ends: 322 [2018-12-09 02:10:47,652 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 [2018-12-09 02:10:47,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-12-09 02:10:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-12-09 02:10:47,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-12-09 02:10:47,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-12-09 02:10:47,685 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-12-09 02:10:47,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:47,686 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-12-09 02:10:47,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 02:10:47,686 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-12-09 02:10:47,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 02:10:47,686 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:47,687 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] [2018-12-09 02:10:47,687 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:47,687 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:47,687 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-09 02:10:47,687 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 02:10:47,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,690 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:47,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,690 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 02:10:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:47,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:47,737 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:47,737 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 02:10:47,737 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 02:10:47,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 02:10:47,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 02:10:47,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 02:10:47,738 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-12-09 02:10:47,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:47,764 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-12-09 02:10:47,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:10:47,765 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 02:10:47,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:47,766 INFO L225 Difference]: With dead ends: 411 [2018-12-09 02:10:47,766 INFO L226 Difference]: Without dead ends: 290 [2018-12-09 02:10:47,767 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 [2018-12-09 02:10:47,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-09 02:10:47,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-09 02:10:47,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-09 02:10:47,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-09 02:10:47,779 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-09 02:10:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:47,779 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-09 02:10:47,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 02:10:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-09 02:10:47,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 02:10:47,780 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:47,780 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] [2018-12-09 02:10:47,781 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:47,781 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:47,781 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-09 02:10:47,781 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 02:10:47,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,784 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:47,784 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,784 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 02:10:47,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:47,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:47,828 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:47,828 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 02:10:47,828 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 02:10:47,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:10:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:10:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:10:47,829 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-09 02:10:47,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:47,865 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-09 02:10:47,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:10:47,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-09 02:10:47,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:47,867 INFO L225 Difference]: With dead ends: 437 [2018-12-09 02:10:47,867 INFO L226 Difference]: Without dead ends: 309 [2018-12-09 02:10:47,867 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 [2018-12-09 02:10:47,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-09 02:10:47,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-09 02:10:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-09 02:10:47,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-09 02:10:47,873 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-09 02:10:47,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:47,873 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-09 02:10:47,873 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:10:47,873 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-09 02:10:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 02:10:47,873 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:47,874 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] [2018-12-09 02:10:47,874 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:47,874 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:47,874 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-09 02:10:47,874 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 02:10:47,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,876 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:47,876 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,876 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 02:10:47,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:47,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:47,912 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:47,912 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 02:10:47,912 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-12-09 02:10:47,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:10:47,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:10:47,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:10:47,913 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-09 02:10:47,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:47,952 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-09 02:10:47,952 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:10:47,952 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-09 02:10:47,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:47,953 INFO L225 Difference]: With dead ends: 456 [2018-12-09 02:10:47,953 INFO L226 Difference]: Without dead ends: 319 [2018-12-09 02:10:47,953 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 [2018-12-09 02:10:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-09 02:10:47,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-09 02:10:47,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-09 02:10:47,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-09 02:10:47,959 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-09 02:10:47,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:47,959 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-09 02:10:47,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:10:47,960 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-09 02:10:47,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 02:10:47,960 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:47,960 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] [2018-12-09 02:10:47,961 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:47,961 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:47,961 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-09 02:10:47,961 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-12-09 02:10:47,962 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,963 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:10:47,963 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-12-09 02:10:47,963 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-12-09 02:10:47,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:48,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:10:48,013 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-12-09 02:10:48,014 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 [2018-12-09 02:10:48,016 INFO L168 Benchmark]: Toolchain (without parser) took 1278.18 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 950.6 MB in the beginning and 921.2 MB in the end (delta: 29.4 MB). Peak memory consumption was 118.5 MB. Max. memory is 11.5 GB. [2018-12-09 02:10:48,017 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:10:48,017 INFO L168 Benchmark]: CACSL2BoogieTranslator took 281.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -117.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. [2018-12-09 02:10:48,018 INFO L168 Benchmark]: Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:10:48,018 INFO L168 Benchmark]: Boogie Preprocessor took 15.34 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-12-09 02:10:48,018 INFO L168 Benchmark]: RCFGBuilder took 206.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. [2018-12-09 02:10:48,018 INFO L168 Benchmark]: TraceAbstraction took 746.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 921.2 MB in the end (delta: 127.3 MB). Peak memory consumption was 127.3 MB. Max. memory is 11.5 GB. [2018-12-09 02:10:48,020 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 1.0 GB. Free memory is still 976.9 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 281.30 ms. Allocated memory was 1.0 GB in the beginning and 1.1 GB in the end (delta: 89.1 MB). Free memory was 950.6 MB in the beginning and 1.1 GB in the end (delta: -117.0 MB). Peak memory consumption was 30.4 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 26.29 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * Boogie Preprocessor took 15.34 ms. Allocated memory is still 1.1 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 206.48 ms. Allocated memory is still 1.1 GB. Free memory was 1.1 GB in the beginning and 1.0 GB in the end (delta: 19.2 MB). Peak memory consumption was 19.2 MB. Max. memory is 11.5 GB. * TraceAbstraction took 746.27 ms. Allocated memory is still 1.1 GB. Free memory was 1.0 GB in the beginning and 921.2 MB in the end (delta: 127.3 MB). Peak memory consumption was 127.3 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 [2018-12-09 02:10:49,313 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-12-09 02:10:49,314 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-12-09 02:10:49,320 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-12-09 02:10:49,320 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-12-09 02:10:49,321 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-12-09 02:10:49,321 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-12-09 02:10:49,322 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-12-09 02:10:49,323 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-12-09 02:10:49,323 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-12-09 02:10:49,324 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-12-09 02:10:49,324 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-12-09 02:10:49,324 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-12-09 02:10:49,325 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-12-09 02:10:49,326 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-12-09 02:10:49,326 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-12-09 02:10:49,326 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-12-09 02:10:49,327 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-12-09 02:10:49,328 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-12-09 02:10:49,329 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-12-09 02:10:49,329 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-12-09 02:10:49,330 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-12-09 02:10:49,331 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-12-09 02:10:49,331 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-12-09 02:10:49,331 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-12-09 02:10:49,332 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-12-09 02:10:49,332 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-12-09 02:10:49,333 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-12-09 02:10:49,333 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-12-09 02:10:49,334 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-12-09 02:10:49,334 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-12-09 02:10:49,334 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-12-09 02:10:49,334 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-12-09 02:10:49,335 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-12-09 02:10:49,335 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-12-09 02:10:49,335 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-12-09 02:10:49,336 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-12-09 02:10:49,343 INFO L110 SettingsManager]: Loading preferences was successful [2018-12-09 02:10:49,343 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-12-09 02:10:49,343 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-12-09 02:10:49,343 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-12-09 02:10:49,344 INFO L133 SettingsManager]: * User list type=DISABLED [2018-12-09 02:10:49,344 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-12-09 02:10:49,344 INFO L133 SettingsManager]: * Explicit value domain=true [2018-12-09 02:10:49,344 INFO L133 SettingsManager]: * Octagon Domain=false [2018-12-09 02:10:49,344 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-12-09 02:10:49,344 INFO L133 SettingsManager]: * Interval Domain=false [2018-12-09 02:10:49,345 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * sizeof long=4 [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-12-09 02:10:49,345 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * sizeof long double=12 [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * Use constant arrays=true [2018-12-09 02:10:49,346 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-12-09 02:10:49,346 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-12-09 02:10:49,347 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-12-09 02:10:49,347 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-12-09 02:10:49,348 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-12-09 02:10:49,348 INFO L133 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2018-12-09 02:10:49,348 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-12-09 02:10:49,348 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_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 -> 5c411f7a0e92322da42b7e0fe2dbd9719b462a69 [2018-12-09 02:10:49,366 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-12-09 02:10:49,373 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-12-09 02:10:49,375 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-12-09 02:10:49,375 INFO L271 PluginConnector]: Initializing CDTParser... [2018-12-09 02:10:49,376 INFO L276 PluginConnector]: CDTParser initialized [2018-12-09 02:10:49,376 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-09 02:10:49,412 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/b06f47d0b/cd2cc744230e4fa28c81aa9e177b9ac0/FLAG1c8fb96dc [2018-12-09 02:10:49,907 INFO L307 CDTParser]: Found 1 translation units. [2018-12-09 02:10:49,908 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/sv-benchmarks/c/pthread/triangular-longer_false-unreach-call.i [2018-12-09 02:10:49,914 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/b06f47d0b/cd2cc744230e4fa28c81aa9e177b9ac0/FLAG1c8fb96dc [2018-12-09 02:10:50,395 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/data/b06f47d0b/cd2cc744230e4fa28c81aa9e177b9ac0 [2018-12-09 02:10:50,397 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-12-09 02:10:50,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-12-09 02:10:50,399 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-12-09 02:10:50,399 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-12-09 02:10:50,401 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-12-09 02:10:50,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,403 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4fe97d50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50, skipping insertion in model container [2018-12-09 02:10:50,403 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,407 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-12-09 02:10:50,433 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-12-09 02:10:50,616 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:10:50,623 INFO L191 MainTranslator]: Completed pre-run [2018-12-09 02:10:50,684 INFO L203 PostProcessor]: Analyzing one entry point: main [2018-12-09 02:10:50,712 INFO L195 MainTranslator]: Completed translation [2018-12-09 02:10:50,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50 WrapperNode [2018-12-09 02:10:50,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-12-09 02:10:50,713 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-12-09 02:10:50,713 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-12-09 02:10:50,714 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-12-09 02:10:50,718 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,727 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,738 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-12-09 02:10:50,738 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-12-09 02:10:50,738 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-12-09 02:10:50,738 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-12-09 02:10:50,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,745 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,745 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,749 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,752 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,753 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... [2018-12-09 02:10:50,754 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-12-09 02:10:50,754 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-12-09 02:10:50,755 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-12-09 02:10:50,755 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-12-09 02:10:50,755 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-12-09 02:10:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-12-09 02:10:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-12-09 02:10:50,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-12-09 02:10:50,785 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-12-09 02:10:50,786 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-12-09 02:10:50,931 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-12-09 02:10:50,931 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-12-09 02:10:50,931 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:50 BoogieIcfgContainer [2018-12-09 02:10:50,931 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-12-09 02:10:50,932 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-12-09 02:10:50,932 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-12-09 02:10:50,934 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-12-09 02:10:50,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 02:10:50" (1/3) ... [2018-12-09 02:10:50,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40942f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:10:50, skipping insertion in model container [2018-12-09 02:10:50,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 02:10:50" (2/3) ... [2018-12-09 02:10:50,934 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40942f4c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 02:10:50, skipping insertion in model container [2018-12-09 02:10:50,934 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:50" (3/3) ... [2018-12-09 02:10:50,935 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer_false-unreach-call.i [2018-12-09 02:10:50,953 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,953 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,953 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,953 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,954 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,955 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,956 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-12-09 02:10:50,964 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-12-09 02:10:50,964 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-12-09 02:10:50,969 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-12-09 02:10:50,977 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-12-09 02:10:50,990 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-12-09 02:10:50,991 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-12-09 02:10:50,991 INFO L383 AbstractCegarLoop]: Hoare is true [2018-12-09 02:10:50,991 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-12-09 02:10:50,991 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-12-09 02:10:50,991 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-12-09 02:10:50,991 INFO L387 AbstractCegarLoop]: Difference is false [2018-12-09 02:10:50,991 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-12-09 02:10:50,991 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-12-09 02:10:50,996 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-12-09 02:10:51,026 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-12-09 02:10:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-12-09 02:10:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-12-09 02:10:51,033 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,033 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:10:51,034 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,038 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,038 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-12-09 02:10:51,041 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,041 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,060 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:51,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:51,106 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,157 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 02:10:51,160 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:51,160 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 02:10:51,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 02:10:51,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 02:10:51,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 02:10:51,177 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-12-09 02:10:51,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:51,268 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2018-12-09 02:10:51,269 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:10:51,270 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-12-09 02:10:51,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:51,280 INFO L225 Difference]: With dead ends: 1777 [2018-12-09 02:10:51,280 INFO L226 Difference]: Without dead ends: 499 [2018-12-09 02:10:51,281 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 [2018-12-09 02:10:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-12-09 02:10:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2018-12-09 02:10:51,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-12-09 02:10:51,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2018-12-09 02:10:51,318 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2018-12-09 02:10:51,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:51,318 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2018-12-09 02:10:51,319 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 02:10:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2018-12-09 02:10:51,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 02:10:51,319 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,319 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] [2018-12-09 02:10:51,320 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,320 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,320 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-12-09 02:10:51,320 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,320 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,338 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:51,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:51,369 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,397 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 02:10:51,398 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:51,398 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 02:10:51,399 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 02:10:51,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 02:10:51,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 02:10:51,400 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2018-12-09 02:10:51,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:51,447 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2018-12-09 02:10:51,447 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:10:51,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 02:10:51,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:51,449 INFO L225 Difference]: With dead ends: 464 [2018-12-09 02:10:51,449 INFO L226 Difference]: Without dead ends: 343 [2018-12-09 02:10:51,450 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 [2018-12-09 02:10:51,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-12-09 02:10:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2018-12-09 02:10:51,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-09 02:10:51,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2018-12-09 02:10:51,463 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2018-12-09 02:10:51,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:51,464 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2018-12-09 02:10:51,464 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 02:10:51,464 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2018-12-09 02:10:51,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-12-09 02:10:51,465 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,465 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] [2018-12-09 02:10:51,465 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,465 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,465 INFO L82 PathProgramCache]: Analyzing trace with hash 676041288, now seen corresponding path program 1 times [2018-12-09 02:10:51,466 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,466 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,487 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:51,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:51,519 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,539 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 02:10:51,540 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:51,540 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-12-09 02:10:51,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-12-09 02:10:51,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-12-09 02:10:51,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-12-09 02:10:51,541 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2018-12-09 02:10:51,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:51,580 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2018-12-09 02:10:51,580 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-12-09 02:10:51,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-12-09 02:10:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:51,581 INFO L225 Difference]: With dead ends: 420 [2018-12-09 02:10:51,581 INFO L226 Difference]: Without dead ends: 290 [2018-12-09 02:10:51,582 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 [2018-12-09 02:10:51,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-12-09 02:10:51,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-12-09 02:10:51,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-12-09 02:10:51,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-12-09 02:10:51,588 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-12-09 02:10:51,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:51,589 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-12-09 02:10:51,589 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-12-09 02:10:51,589 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-12-09 02:10:51,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 02:10:51,590 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,590 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] [2018-12-09 02:10:51,590 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,590 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,590 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-12-09 02:10:51,591 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,591 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,607 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:51,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:51,641 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,666 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 02:10:51,667 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:51,667 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 02:10:51,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:10:51,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:10:51,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:10:51,668 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-12-09 02:10:51,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:51,729 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-12-09 02:10:51,730 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:10:51,730 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-09 02:10:51,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:51,731 INFO L225 Difference]: With dead ends: 437 [2018-12-09 02:10:51,732 INFO L226 Difference]: Without dead ends: 309 [2018-12-09 02:10:51,732 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 [2018-12-09 02:10:51,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-12-09 02:10:51,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-12-09 02:10:51,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-12-09 02:10:51,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-12-09 02:10:51,737 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-12-09 02:10:51,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:51,737 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-12-09 02:10:51,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:10:51,738 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-12-09 02:10:51,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-12-09 02:10:51,738 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,739 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] [2018-12-09 02:10:51,739 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,739 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,739 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-12-09 02:10:51,739 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,739 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,761 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 02:10:51,795 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-12-09 02:10:51,795 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:10:51,796 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,823 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-12-09 02:10:51,824 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-12-09 02:10:51,824 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-12-09 02:10:51,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-12-09 02:10:51,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-12-09 02:10:51,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-12-09 02:10:51,825 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-12-09 02:10:51,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:51,883 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-12-09 02:10:51,884 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-12-09 02:10:51,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-12-09 02:10:51,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:51,885 INFO L225 Difference]: With dead ends: 456 [2018-12-09 02:10:51,885 INFO L226 Difference]: Without dead ends: 319 [2018-12-09 02:10:51,886 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 [2018-12-09 02:10:51,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-12-09 02:10:51,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-12-09 02:10:51,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-12-09 02:10:51,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-12-09 02:10:51,894 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-12-09 02:10:51,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:51,894 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-12-09 02:10:51,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-12-09 02:10:51,894 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-12-09 02:10:51,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 02:10:51,895 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:51,896 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] [2018-12-09 02:10:51,896 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:51,896 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:51,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-12-09 02:10:51,896 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:51,897 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:51,913 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-12-09 02:10:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:51,953 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:51,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:51,990 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:52,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,108 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:10:52,108 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:52,118 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:52,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:52,133 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,138 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:52,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,175 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:10:52,175 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-09 02:10:52,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 02:10:52,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 02:10:52,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-09 02:10:52,176 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 11 states. [2018-12-09 02:10:52,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:52,704 INFO L93 Difference]: Finished difference Result 760 states and 1850 transitions. [2018-12-09 02:10:52,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-12-09 02:10:52,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-09 02:10:52,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:52,706 INFO L225 Difference]: With dead ends: 760 [2018-12-09 02:10:52,706 INFO L226 Difference]: Without dead ends: 383 [2018-12-09 02:10:52,706 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-12-09 02:10:52,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-12-09 02:10:52,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 351. [2018-12-09 02:10:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-12-09 02:10:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-12-09 02:10:52,712 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-12-09 02:10:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:52,712 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-12-09 02:10:52,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 02:10:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-12-09 02:10:52,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-12-09 02:10:52,713 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:52,713 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] [2018-12-09 02:10:52,713 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:52,713 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:52,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-12-09 02:10:52,714 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:52,714 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:52,729 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:52,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:52,765 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:52,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,795 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:52,918 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,920 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:10:52,920 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:52,927 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:52,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:52,939 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,942 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:52,960 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:52,975 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:10:52,975 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-12-09 02:10:52,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-12-09 02:10:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-12-09 02:10:52,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-12-09 02:10:52,976 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 11 states. [2018-12-09 02:10:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:53,523 INFO L93 Difference]: Finished difference Result 824 states and 1978 transitions. [2018-12-09 02:10:53,524 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-12-09 02:10:53,524 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-12-09 02:10:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:53,526 INFO L225 Difference]: With dead ends: 824 [2018-12-09 02:10:53,526 INFO L226 Difference]: Without dead ends: 447 [2018-12-09 02:10:53,526 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-12-09 02:10:53,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-12-09 02:10:53,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-12-09 02:10:53,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-09 02:10:53,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-09 02:10:53,536 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 29 [2018-12-09 02:10:53,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:53,536 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-09 02:10:53,536 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-12-09 02:10:53,537 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-09 02:10:53,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-12-09 02:10:53,538 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:53,538 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] [2018-12-09 02:10:53,538 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:53,538 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:53,538 INFO L82 PathProgramCache]: Analyzing trace with hash -956668217, now seen corresponding path program 1 times [2018-12-09 02:10:53,539 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:53,539 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:53,562 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:53,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:53,627 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:53,685 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 02:10:53,685 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:54,041 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 02:10:54,043 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:10:54,043 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:54,054 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-12-09 02:10:54,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-12-09 02:10:54,076 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:54,081 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 02:10:54,081 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:54,115 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-12-09 02:10:54,130 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:10:54,130 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-12-09 02:10:54,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-12-09 02:10:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-12-09 02:10:54,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-12-09 02:10:54,131 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 17 states. [2018-12-09 02:10:55,355 WARN L180 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 21 [2018-12-09 02:10:55,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:10:55,818 INFO L93 Difference]: Finished difference Result 1302 states and 3081 transitions. [2018-12-09 02:10:55,818 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-12-09 02:10:55,819 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-12-09 02:10:55,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:10:55,820 INFO L225 Difference]: With dead ends: 1302 [2018-12-09 02:10:55,820 INFO L226 Difference]: Without dead ends: 643 [2018-12-09 02:10:55,820 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2018-12-09 02:10:55,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-12-09 02:10:55,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 447. [2018-12-09 02:10:55,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-12-09 02:10:55,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-12-09 02:10:55,826 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 45 [2018-12-09 02:10:55,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:10:55,826 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-12-09 02:10:55,826 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-12-09 02:10:55,826 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-12-09 02:10:55,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-12-09 02:10:55,826 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:10:55,827 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] [2018-12-09 02:10:55,827 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:10:55,827 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:10:55,827 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 2 times [2018-12-09 02:10:55,827 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:10:55,827 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:55,843 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-12-09 02:10:55,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 02:10:55,915 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:10:55,917 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:56,015 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:56,015 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:56,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:56,778 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:10:56,778 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:10:56,786 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-12-09 02:10:56,819 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-12-09 02:10:56,820 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:10:56,824 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:10:56,833 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:56,833 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:10:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:10:56,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:10:56,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2018-12-09 02:10:56,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-12-09 02:10:56,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-12-09 02:10:56,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2018-12-09 02:10:56,873 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 25 states. [2018-12-09 02:10:57,375 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-09 02:10:57,646 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-09 02:10:59,376 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-09 02:10:59,606 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2018-12-09 02:11:00,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:11:00,625 INFO L93 Difference]: Finished difference Result 1522 states and 3619 transitions. [2018-12-09 02:11:00,625 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2018-12-09 02:11:00,625 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-12-09 02:11:00,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:11:00,628 INFO L225 Difference]: With dead ends: 1522 [2018-12-09 02:11:00,628 INFO L226 Difference]: Without dead ends: 735 [2018-12-09 02:11:00,629 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=654, Invalid=2208, Unknown=0, NotChecked=0, Total=2862 [2018-12-09 02:11:00,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2018-12-09 02:11:00,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2018-12-09 02:11:00,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 735 states. [2018-12-09 02:11:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1604 transitions. [2018-12-09 02:11:00,639 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1604 transitions. Word has length 57 [2018-12-09 02:11:00,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:11:00,639 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1604 transitions. [2018-12-09 02:11:00,639 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-12-09 02:11:00,639 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1604 transitions. [2018-12-09 02:11:00,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-12-09 02:11:00,640 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:11:00,640 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] [2018-12-09 02:11:00,640 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:11:00,641 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:11:00,641 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 3 times [2018-12-09 02:11:00,641 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:11:00,641 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:11:00,657 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-12-09 02:11:00,776 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 02:11:00,776 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:11:00,779 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:11:00,900 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:00,900 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:11:01,824 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:01,826 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:11:01,826 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:11:01,833 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-12-09 02:11:01,883 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-12-09 02:11:01,883 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:11:01,886 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:11:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:01,895 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:11:01,923 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:01,944 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:11:01,944 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17] total 31 [2018-12-09 02:11:01,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-12-09 02:11:01,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-12-09 02:11:01,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2018-12-09 02:11:01,946 INFO L87 Difference]: Start difference. First operand 735 states and 1604 transitions. Second operand 31 states. [2018-12-09 02:11:02,611 WARN L180 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-09 02:11:03,683 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-12-09 02:11:05,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:11:05,742 INFO L93 Difference]: Finished difference Result 1666 states and 3907 transitions. [2018-12-09 02:11:05,742 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2018-12-09 02:11:05,742 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-12-09 02:11:05,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:11:05,744 INFO L225 Difference]: With dead ends: 1666 [2018-12-09 02:11:05,744 INFO L226 Difference]: Without dead ends: 879 [2018-12-09 02:11:05,745 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=742, Invalid=2918, Unknown=0, NotChecked=0, Total=3660 [2018-12-09 02:11:05,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2018-12-09 02:11:05,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 591. [2018-12-09 02:11:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 591 states. [2018-12-09 02:11:05,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 591 states to 591 states and 1316 transitions. [2018-12-09 02:11:05,750 INFO L78 Accepts]: Start accepts. Automaton has 591 states and 1316 transitions. Word has length 69 [2018-12-09 02:11:05,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:11:05,750 INFO L480 AbstractCegarLoop]: Abstraction has 591 states and 1316 transitions. [2018-12-09 02:11:05,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-12-09 02:11:05,750 INFO L276 IsEmpty]: Start isEmpty. Operand 591 states and 1316 transitions. [2018-12-09 02:11:05,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2018-12-09 02:11:05,751 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:11:05,751 INFO L402 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:11:05,751 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:11:05,752 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:11:05,752 INFO L82 PathProgramCache]: Analyzing trace with hash -265515347, now seen corresponding path program 4 times [2018-12-09 02:11:05,752 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:11:05,752 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:11:05,767 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 02:11:05,889 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 02:11:05,889 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:11:05,891 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:11:06,090 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:06,091 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:11:07,703 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:07,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-12-09 02:11:07,706 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:11:07,713 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-12-09 02:11:07,740 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-12-09 02:11:07,741 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-12-09 02:11:07,744 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-12-09 02:11:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:07,757 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-12-09 02:11:07,820 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-12-09 02:11:07,845 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-12-09 02:11:07,846 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23, 23] total 43 [2018-12-09 02:11:07,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2018-12-09 02:11:07,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2018-12-09 02:11:07,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2018-12-09 02:11:07,846 INFO L87 Difference]: Start difference. First operand 591 states and 1316 transitions. Second operand 43 states. [2018-12-09 02:11:08,499 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 14 [2018-12-09 02:11:09,259 WARN L180 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 18 [2018-12-09 02:11:09,942 WARN L180 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-12-09 02:11:10,675 WARN L180 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-12-09 02:11:11,395 WARN L180 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-12-09 02:11:12,082 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-12-09 02:11:12,800 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-12-09 02:11:13,459 WARN L180 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-12-09 02:11:14,119 WARN L180 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-12-09 02:11:14,719 WARN L180 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-12-09 02:11:15,318 WARN L180 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-12-09 02:11:15,866 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-12-09 02:11:18,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-12-09 02:11:18,569 INFO L93 Difference]: Finished difference Result 1026 states and 2235 transitions. [2018-12-09 02:11:18,569 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2018-12-09 02:11:18,569 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 93 [2018-12-09 02:11:18,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-12-09 02:11:18,571 INFO L225 Difference]: With dead ends: 1026 [2018-12-09 02:11:18,571 INFO L226 Difference]: Without dead ends: 895 [2018-12-09 02:11:18,572 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 326 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=1062, Invalid=5580, Unknown=0, NotChecked=0, Total=6642 [2018-12-09 02:11:18,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2018-12-09 02:11:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 895. [2018-12-09 02:11:18,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 895 states. [2018-12-09 02:11:18,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 1924 transitions. [2018-12-09 02:11:18,579 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 1924 transitions. Word has length 93 [2018-12-09 02:11:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-12-09 02:11:18,579 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 1924 transitions. [2018-12-09 02:11:18,579 INFO L481 AbstractCegarLoop]: Interpolant automaton has 43 states. [2018-12-09 02:11:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 1924 transitions. [2018-12-09 02:11:18,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2018-12-09 02:11:18,580 INFO L394 BasicCegarLoop]: Found error trace [2018-12-09 02:11:18,580 INFO L402 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-12-09 02:11:18,580 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-12-09 02:11:18,580 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-12-09 02:11:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash -510825526, now seen corresponding path program 5 times [2018-12-09 02:11:18,580 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-12-09 02:11:18,580 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/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 [2018-12-09 02:11:18,596 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-12-09 02:11:18,747 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2018-12-09 02:11:18,747 INFO L250 tOrderPrioritization]: Conjunction of SSA is sat [2018-12-09 02:11:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2018-12-09 02:11:18,953 INFO L469 BasicCegarLoop]: Counterexample might be feasible [2018-12-09 02:11:19,027 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-12-09 02:11:19,028 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 02:11:19 BasicIcfg [2018-12-09 02:11:19,028 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-12-09 02:11:19,028 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-12-09 02:11:19,028 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-12-09 02:11:19,028 INFO L276 PluginConnector]: Witness Printer initialized [2018-12-09 02:11:19,029 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 02:10:50" (3/4) ... [2018-12-09 02:11:19,030 INFO L138 WitnessPrinter]: Generating witness for reachability counterexample [2018-12-09 02:11:19,095 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_d4a3257a-efac-4bde-b7ad-4d8f0726fe74/bin-2019/utaipan/witness.graphml [2018-12-09 02:11:19,095 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-12-09 02:11:19,096 INFO L168 Benchmark]: Toolchain (without parser) took 28698.21 ms. Allocated memory was 1.0 GB in the beginning and 1.4 GB in the end (delta: 342.9 MB). Free memory was 938.0 MB in the beginning and 1.2 GB in the end (delta: -283.7 MB). Peak memory consumption was 59.1 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,096 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. [2018-12-09 02:11:19,096 INFO L168 Benchmark]: CACSL2BoogieTranslator took 314.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,097 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.28 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. [2018-12-09 02:11:19,097 INFO L168 Benchmark]: Boogie Preprocessor took 16.46 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,097 INFO L168 Benchmark]: RCFGBuilder took 177.02 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: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,097 INFO L168 Benchmark]: TraceAbstraction took 28095.87 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 208.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -148.4 MB). Peak memory consumption was 60.3 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,097 INFO L168 Benchmark]: Witness Printer took 67.41 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. [2018-12-09 02:11:19,099 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 314.48 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 134.2 MB). Free memory was 938.0 MB in the beginning and 1.1 GB in the end (delta: -169.4 MB). Peak memory consumption was 31.8 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 24.28 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 16.46 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: 6.5 MB). Peak memory consumption was 6.5 MB. Max. memory is 11.5 GB. * RCFGBuilder took 177.02 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: 17.4 MB). Peak memory consumption was 17.4 MB. Max. memory is 11.5 GB. * TraceAbstraction took 28095.87 ms. Allocated memory was 1.2 GB in the beginning and 1.4 GB in the end (delta: 208.7 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -148.4 MB). Peak memory consumption was 60.3 MB. Max. memory is 11.5 GB. * Witness Printer took 67.41 ms. Allocated memory is still 1.4 GB. Free memory was 1.2 GB in the beginning and 1.2 GB in the end (delta: 10.1 MB). Peak memory consumption was 10.1 MB. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 688]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L660] -1 int i = 3, j = 6; VAL [i=3, j=6] [L678] -1 pthread_t id1, id2; VAL [i=3, j=6] [L679] FCALL, FORK -1 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L662] 0 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L680] FCALL, FORK -1 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L670] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=1] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=2] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=8] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=8] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=8] [L670] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=8] [L662] 0 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L662] COND TRUE 0 k < 10 [L664] 0 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L670] COND TRUE 1 k < 10 [L672] 1 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L682] -1 int condI = i >= (2*10 +6); [L685] -1 int condJ = j >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L687] COND TRUE -1 condI || condJ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L688] -1 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. UNSAFE Result, 28.0s OverallTime, 12 OverallIterations, 10 TraceHistogramMax, 21.3s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 914 SDtfs, 5001 SDslu, 8437 SDs, 0 SdLazy, 2187 SolverSat, 752 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1518 GetRequests, 1225 SyntacticMatches, 4 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2505 ImplicationChecksByTransitivity, 23.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1012occurred in iteration=0, 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, 11 MinimizatonAttempts, 662 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.8s InterpolantComputationTime, 854 NumberOfCodeBlocks, 854 NumberOfCodeBlocksAsserted, 41 NumberOfCheckSat, 1372 ConstructedInterpolants, 0 QuantifiedInterpolants, 604836 SizeOfPredicates, 166 NumberOfNonLiveVariables, 1226 ConjunctsInSsa, 183 ConjunctsInUnsatCore, 29 InterpolantComputations, 5 PerfectInterpolantSequences, 16/1852 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...