./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aa418289 Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d ............................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/config -Xmx12G -Xms1G -jar /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i -s /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash b2c24b72038b46d201b1011ce763d9f0fb09353d ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.1.23-aa41828 [2018-11-23 02:07:54,645 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 02:07:54,646 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 02:07:54,653 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 02:07:54,654 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 02:07:54,655 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 02:07:54,656 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 02:07:54,657 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 02:07:54,658 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 02:07:54,659 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 02:07:54,660 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 02:07:54,660 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 02:07:54,661 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 02:07:54,662 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 02:07:54,663 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 02:07:54,664 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 02:07:54,664 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 02:07:54,665 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 02:07:54,666 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 02:07:54,667 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 02:07:54,668 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 02:07:54,668 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 02:07:54,672 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 02:07:54,673 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 02:07:54,673 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 02:07:54,674 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 02:07:54,674 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 02:07:54,675 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 02:07:54,676 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 02:07:54,676 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 02:07:54,677 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 02:07:54,678 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 02:07:54,678 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 02:07:54,678 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 02:07:54,679 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 02:07:54,680 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 02:07:54,680 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Default.epf [2018-11-23 02:07:54,691 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 02:07:54,691 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 02:07:54,692 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 02:07:54,692 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 02:07:54,692 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 02:07:54,692 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 02:07:54,692 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 02:07:54,692 INFO L133 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2018-11-23 02:07:54,692 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 02:07:54,693 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 02:07:54,693 INFO L133 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2018-11-23 02:07:54,693 INFO L133 SettingsManager]: * Use the RCFG-of-the-future interface=true [2018-11-23 02:07:54,693 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 02:07:54,695 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 02:07:54,695 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 02:07:54,695 INFO L133 SettingsManager]: * Overapproximate operations on floating types=true [2018-11-23 02:07:54,695 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 02:07:54,695 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 02:07:54,696 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 02:07:54,697 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:07:54,697 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 02:07:54,697 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 02:07:54,698 INFO L133 SettingsManager]: * Trace refinement strategy=TAIPAN [2018-11-23 02:07:54,698 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 02:07:54,698 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2018-11-23 02:07:54,698 INFO L133 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2018-11-23 02:07:54,698 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_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-11-23 02:07:54,724 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 02:07:54,734 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 02:07:54,736 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 02:07:54,737 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 02:07:54,738 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 02:07:54,738 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-23 02:07:54,782 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/177f7fa2a/85236f34218a4447b01117cf1344d8f1/FLAGb9e3622d6 [2018-11-23 02:07:55,160 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 02:07:55,161 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-23 02:07:55,171 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/177f7fa2a/85236f34218a4447b01117cf1344d8f1/FLAGb9e3622d6 [2018-11-23 02:07:55,543 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/177f7fa2a/85236f34218a4447b01117cf1344d8f1 [2018-11-23 02:07:55,546 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 02:07:55,547 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 02:07:55,547 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 02:07:55,547 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 02:07:55,551 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 02:07:55,551 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,554 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56501d1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55, skipping insertion in model container [2018-11-23 02:07:55,554 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,562 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 02:07:55,592 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 02:07:55,794 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:07:55,800 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 02:07:55,890 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:07:55,923 INFO L195 MainTranslator]: Completed translation [2018-11-23 02:07:55,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55 WrapperNode [2018-11-23 02:07:55,923 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 02:07:55,924 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 02:07:55,924 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 02:07:55,924 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 02:07:55,930 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,940 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,954 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 02:07:55,954 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 02:07:55,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 02:07:55,954 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 02:07:55,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,962 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,962 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,966 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,970 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,974 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... [2018-11-23 02:07:55,976 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 02:07:55,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 02:07:55,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 02:07:55,976 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 02:07:55,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:07:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 02:07:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-23 02:07:56,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-23 02:07:56,017 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-23 02:07:56,017 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-23 02:07:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2018-11-23 02:07:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-23 02:07:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 02:07:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-23 02:07:56,018 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 02:07:56,018 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 02:07:56,019 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-23 02:07:56,225 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 02:07:56,225 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-23 02:07:56,225 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:56 BoogieIcfgContainer [2018-11-23 02:07:56,225 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 02:07:56,226 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 02:07:56,226 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 02:07:56,229 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 02:07:56,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:55" (1/3) ... [2018-11-23 02:07:56,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9b8fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:56, skipping insertion in model container [2018-11-23 02:07:56,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:55" (2/3) ... [2018-11-23 02:07:56,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b9b8fad and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:56, skipping insertion in model container [2018-11-23 02:07:56,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:56" (3/3) ... [2018-11-23 02:07:56,232 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-11-23 02:07:56,251 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,252 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,252 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,252 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,252 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,253 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,254 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,254 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,254 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,254 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,254 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,255 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,255 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,255 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,255 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,255 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,256 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,257 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:07:56,261 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-23 02:07:56,262 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 02:07:56,268 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 02:07:56,278 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 02:07:56,295 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 02:07:56,295 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 02:07:56,295 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 02:07:56,295 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 02:07:56,295 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 02:07:56,295 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 02:07:56,296 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 02:07:56,296 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 02:07:56,302 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-23 02:07:56,343 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-23 02:07:56,344 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-23 02:07:56,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 02:07:56,351 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:07:56,352 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:07:56,353 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:07:56,357 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:07:56,357 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-23 02:07:56,358 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:07:56,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,397 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:07:56,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,397 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:07:56,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:07:56,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:07:56,556 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:07:56,557 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:07:56,557 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:07:56,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:07:56,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:07:56,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:07:56,570 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-23 02:07:56,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:07:56,666 INFO L93 Difference]: Finished difference Result 1411 states and 4051 transitions. [2018-11-23 02:07:56,666 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:07:56,667 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-23 02:07:56,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:07:56,679 INFO L225 Difference]: With dead ends: 1411 [2018-11-23 02:07:56,679 INFO L226 Difference]: Without dead ends: 322 [2018-11-23 02:07:56,680 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 [2018-11-23 02:07:56,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2018-11-23 02:07:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 322. [2018-11-23 02:07:56,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2018-11-23 02:07:56,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 820 transitions. [2018-11-23 02:07:56,723 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 820 transitions. Word has length 19 [2018-11-23 02:07:56,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:07:56,723 INFO L480 AbstractCegarLoop]: Abstraction has 322 states and 820 transitions. [2018-11-23 02:07:56,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:07:56,724 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 820 transitions. [2018-11-23 02:07:56,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 02:07:56,725 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:07:56,725 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] [2018-11-23 02:07:56,725 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:07:56,725 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:07:56,725 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-23 02:07:56,725 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:07:56,729 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,730 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:07:56,730 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,730 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:07:56,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:07:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:07:56,793 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:07:56,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:07:56,793 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:07:56,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:07:56,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:07:56,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:07:56,795 INFO L87 Difference]: Start difference. First operand 322 states and 820 transitions. Second operand 5 states. [2018-11-23 02:07:56,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:07:56,822 INFO L93 Difference]: Finished difference Result 411 states and 998 transitions. [2018-11-23 02:07:56,822 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:07:56,823 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-23 02:07:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:07:56,824 INFO L225 Difference]: With dead ends: 411 [2018-11-23 02:07:56,824 INFO L226 Difference]: Without dead ends: 290 [2018-11-23 02:07:56,825 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 [2018-11-23 02:07:56,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-23 02:07:56,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-23 02:07:56,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-23 02:07:56,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-23 02:07:56,837 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-23 02:07:56,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:07:56,838 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-23 02:07:56,838 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:07:56,838 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-23 02:07:56,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 02:07:56,839 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:07:56,839 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] [2018-11-23 02:07:56,839 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:07:56,839 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:07:56,840 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-23 02:07:56,840 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:07:56,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,845 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:07:56,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,845 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:07:56,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:07:56,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:07:56,899 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:07:56,899 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 02:07:56,900 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:07:56,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:07:56,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:07:56,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:07:56,900 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-23 02:07:56,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:07:56,946 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-23 02:07:56,947 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:07:56,947 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 02:07:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:07:56,949 INFO L225 Difference]: With dead ends: 437 [2018-11-23 02:07:56,949 INFO L226 Difference]: Without dead ends: 309 [2018-11-23 02:07:56,949 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 [2018-11-23 02:07:56,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-23 02:07:56,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-23 02:07:56,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-23 02:07:56,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-23 02:07:56,962 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-23 02:07:56,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:07:56,962 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-23 02:07:56,962 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:07:56,962 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-23 02:07:56,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 02:07:56,963 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:07:56,963 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] [2018-11-23 02:07:56,963 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:07:56,964 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:07:56,964 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-23 02:07:56,964 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:07:56,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,969 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:07:56,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:56,969 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:07:56,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:07:57,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:07:57,039 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:07:57,040 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 02:07:57,040 INFO L256 anRefinementStrategy]: Using the first perfect interpolant sequence [2018-11-23 02:07:57,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:07:57,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:07:57,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:07:57,040 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-23 02:07:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:07:57,102 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-23 02:07:57,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:07:57,103 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 02:07:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:07:57,104 INFO L225 Difference]: With dead ends: 456 [2018-11-23 02:07:57,104 INFO L226 Difference]: Without dead ends: 319 [2018-11-23 02:07:57,104 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 [2018-11-23 02:07:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-23 02:07:57,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-23 02:07:57,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-23 02:07:57,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-23 02:07:57,111 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-23 02:07:57,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:07:57,111 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-23 02:07:57,111 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:07:57,111 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-23 02:07:57,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 02:07:57,112 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:07:57,112 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] [2018-11-23 02:07:57,113 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:07:57,113 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:07:57,113 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-23 02:07:57,113 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2018-11-23 02:07:57,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:57,116 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:07:57,116 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2018-11-23 02:07:57,116 INFO L286 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2018-11-23 02:07:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:07:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:07:57,208 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:07:57,208 INFO L192 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2018-11-23 02:07:57,209 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 [2018-11-23 02:07:57,212 INFO L168 Benchmark]: Toolchain (without parser) took 1665.84 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 956.4 MB in the beginning and 984.8 MB in the end (delta: -28.4 MB). Peak memory consumption was 124.2 MB. Max. memory is 11.5 GB. [2018-11-23 02:07:57,213 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:07:57,214 INFO L168 Benchmark]: CACSL2BoogieTranslator took 376.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 11.5 GB. [2018-11-23 02:07:57,214 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.79 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. [2018-11-23 02:07:57,215 INFO L168 Benchmark]: Boogie Preprocessor took 21.80 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. [2018-11-23 02:07:57,215 INFO L168 Benchmark]: RCFGBuilder took 249.56 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. [2018-11-23 02:07:57,216 INFO L168 Benchmark]: TraceAbstraction took 985.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 984.8 MB in the end (delta: 120.1 MB). Peak memory consumption was 120.1 MB. Max. memory is 11.5 GB. [2018-11-23 02:07:57,219 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 985.4 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 376.36 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 152.6 MB). Free memory was 956.4 MB in the beginning and 1.1 GB in the end (delta: -176.3 MB). Peak memory consumption was 38.5 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 29.79 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 21.80 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: 3.3 MB). Peak memory consumption was 3.3 MB. Max. memory is 11.5 GB. * RCFGBuilder took 249.56 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: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 11.5 GB. * TraceAbstraction took 985.27 ms. Allocated memory is still 1.2 GB. Free memory was 1.1 GB in the beginning and 984.8 MB in the end (delta: 120.1 MB). Peak memory consumption was 120.1 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-aa41828 [2018-11-23 02:07:58,696 INFO L170 SettingsManager]: Resetting all preferences to default values... [2018-11-23 02:07:58,697 INFO L174 SettingsManager]: Resetting UltimateCore preferences to default values [2018-11-23 02:07:58,705 INFO L177 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2018-11-23 02:07:58,706 INFO L174 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2018-11-23 02:07:58,706 INFO L174 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2018-11-23 02:07:58,707 INFO L174 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2018-11-23 02:07:58,708 INFO L174 SettingsManager]: Resetting LassoRanker preferences to default values [2018-11-23 02:07:58,709 INFO L174 SettingsManager]: Resetting Reaching Definitions preferences to default values [2018-11-23 02:07:58,710 INFO L174 SettingsManager]: Resetting SyntaxChecker preferences to default values [2018-11-23 02:07:58,711 INFO L177 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2018-11-23 02:07:58,711 INFO L174 SettingsManager]: Resetting LTL2Aut preferences to default values [2018-11-23 02:07:58,711 INFO L174 SettingsManager]: Resetting PEA to Boogie preferences to default values [2018-11-23 02:07:58,712 INFO L174 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2018-11-23 02:07:58,713 INFO L174 SettingsManager]: Resetting ChcToBoogie preferences to default values [2018-11-23 02:07:58,713 INFO L174 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2018-11-23 02:07:58,714 INFO L174 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2018-11-23 02:07:58,715 INFO L174 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2018-11-23 02:07:58,716 INFO L174 SettingsManager]: Resetting CodeCheck preferences to default values [2018-11-23 02:07:58,717 INFO L174 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2018-11-23 02:07:58,718 INFO L174 SettingsManager]: Resetting RCFGBuilder preferences to default values [2018-11-23 02:07:58,718 INFO L174 SettingsManager]: Resetting TraceAbstraction preferences to default values [2018-11-23 02:07:58,720 INFO L177 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2018-11-23 02:07:58,720 INFO L177 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2018-11-23 02:07:58,720 INFO L174 SettingsManager]: Resetting TreeAutomizer preferences to default values [2018-11-23 02:07:58,721 INFO L174 SettingsManager]: Resetting IcfgTransformer preferences to default values [2018-11-23 02:07:58,721 INFO L174 SettingsManager]: Resetting Boogie Printer preferences to default values [2018-11-23 02:07:58,722 INFO L174 SettingsManager]: Resetting ReqPrinter preferences to default values [2018-11-23 02:07:58,722 INFO L174 SettingsManager]: Resetting Witness Printer preferences to default values [2018-11-23 02:07:58,723 INFO L177 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2018-11-23 02:07:58,723 INFO L174 SettingsManager]: Resetting CDTParser preferences to default values [2018-11-23 02:07:58,724 INFO L177 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2018-11-23 02:07:58,724 INFO L177 SettingsManager]: ReqParser provides no preferences, ignoring... [2018-11-23 02:07:58,724 INFO L174 SettingsManager]: Resetting SmtParser preferences to default values [2018-11-23 02:07:58,725 INFO L174 SettingsManager]: Resetting Witness Parser preferences to default values [2018-11-23 02:07:58,725 INFO L181 SettingsManager]: Finished resetting all preferences to default values... [2018-11-23 02:07:58,725 INFO L98 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2018-11-23 02:07:58,735 INFO L110 SettingsManager]: Loading preferences was successful [2018-11-23 02:07:58,735 INFO L112 SettingsManager]: Preferences different from defaults after loading the file: [2018-11-23 02:07:58,736 INFO L131 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2018-11-23 02:07:58,736 INFO L133 SettingsManager]: * ... calls to implemented procedures=ONLY_FOR_CONCURRENT_PROGRAMS [2018-11-23 02:07:58,736 INFO L133 SettingsManager]: * User list type=DISABLED [2018-11-23 02:07:58,736 INFO L131 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2018-11-23 02:07:58,737 INFO L133 SettingsManager]: * Explicit value domain=true [2018-11-23 02:07:58,737 INFO L133 SettingsManager]: * Octagon Domain=false [2018-11-23 02:07:58,737 INFO L133 SettingsManager]: * Abstract domain=CompoundDomain [2018-11-23 02:07:58,737 INFO L133 SettingsManager]: * Interval Domain=false [2018-11-23 02:07:58,737 INFO L131 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * sizeof long=4 [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * sizeof POINTER=4 [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * Check division by zero=IGNORE [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * Use bitvectors instead of ints=true [2018-11-23 02:07:58,738 INFO L133 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * sizeof long double=12 [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * Check if freed pointer was valid=false [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * Use constant arrays=true [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2018-11-23 02:07:58,739 INFO L131 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * Size of a code block=SequenceOfStatements [2018-11-23 02:07:58,739 INFO L133 SettingsManager]: * To the following directory=./dump/ [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * SMT solver=External_DefaultMode [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2018-11-23 02:07:58,740 INFO L131 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * Trace refinement strategy=WALRUS [2018-11-23 02:07:58,740 INFO L133 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2018-11-23 02:07:58,741 INFO L133 SettingsManager]: * Command for external solver=cvc4nyu --tear-down-incremental --rewrite-divk --print-success --lang smt [2018-11-23 02:07:58,741 INFO L133 SettingsManager]: * Logic for external solver=AUFBV [2018-11-23 02:07:58,741 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_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(__VERIFIER_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b2c24b72038b46d201b1011ce763d9f0fb09353d [2018-11-23 02:07:58,773 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2018-11-23 02:07:58,782 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2018-11-23 02:07:58,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2018-11-23 02:07:58,786 INFO L271 PluginConnector]: Initializing CDTParser... [2018-11-23 02:07:58,787 INFO L276 PluginConnector]: CDTParser initialized [2018-11-23 02:07:58,787 INFO L418 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/../../sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-23 02:07:58,833 INFO L221 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/3b31f1c9a/dab42ff13dac4928833708c085cfc0be/FLAG0dced566f [2018-11-23 02:07:59,272 INFO L307 CDTParser]: Found 1 translation units. [2018-11-23 02:07:59,273 INFO L161 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/sv-benchmarks/c/pthread/triangular-longest_true-unreach-call.i [2018-11-23 02:07:59,282 INFO L355 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/3b31f1c9a/dab42ff13dac4928833708c085cfc0be/FLAG0dced566f [2018-11-23 02:07:59,290 INFO L363 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/data/3b31f1c9a/dab42ff13dac4928833708c085cfc0be [2018-11-23 02:07:59,292 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2018-11-23 02:07:59,293 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2018-11-23 02:07:59,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2018-11-23 02:07:59,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2018-11-23 02:07:59,297 INFO L276 PluginConnector]: CACSL2BoogieTranslator initialized [2018-11-23 02:07:59,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,300 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d042a83 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59, skipping insertion in model container [2018-11-23 02:07:59,300 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,308 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2018-11-23 02:07:59,339 INFO L176 MainTranslator]: Built tables and reachable declarations [2018-11-23 02:07:59,574 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:07:59,582 INFO L191 MainTranslator]: Completed pre-run [2018-11-23 02:07:59,616 INFO L201 PostProcessor]: Analyzing one entry point: main [2018-11-23 02:07:59,713 INFO L195 MainTranslator]: Completed translation [2018-11-23 02:07:59,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59 WrapperNode [2018-11-23 02:07:59,713 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2018-11-23 02:07:59,714 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2018-11-23 02:07:59,714 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2018-11-23 02:07:59,714 INFO L276 PluginConnector]: Boogie Procedure Inliner initialized [2018-11-23 02:07:59,721 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,731 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,742 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2018-11-23 02:07:59,743 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2018-11-23 02:07:59,743 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2018-11-23 02:07:59,743 INFO L276 PluginConnector]: Boogie Preprocessor initialized [2018-11-23 02:07:59,748 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,748 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,750 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,750 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,754 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,757 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,759 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... [2018-11-23 02:07:59,760 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2018-11-23 02:07:59,761 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2018-11-23 02:07:59,761 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2018-11-23 02:07:59,761 INFO L276 PluginConnector]: RCFGBuilder initialized [2018-11-23 02:07:59,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:07:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.alloc [2018-11-23 02:07:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2018-11-23 02:07:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2018-11-23 02:07:59,793 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2018-11-23 02:07:59,793 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2018-11-23 02:07:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2018-11-23 02:07:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2018-11-23 02:07:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2018-11-23 02:07:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2018-11-23 02:07:59,794 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2018-11-23 02:07:59,794 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2018-11-23 02:07:59,796 WARN L198 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2018-11-23 02:07:59,986 INFO L275 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2018-11-23 02:07:59,987 INFO L280 CfgBuilder]: Removed 6 assue(true) statements. [2018-11-23 02:07:59,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:59 BoogieIcfgContainer [2018-11-23 02:07:59,987 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2018-11-23 02:07:59,987 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2018-11-23 02:07:59,988 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2018-11-23 02:07:59,989 INFO L276 PluginConnector]: TraceAbstraction initialized [2018-11-23 02:07:59,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:07:59" (1/3) ... [2018-11-23 02:07:59,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e6c248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:59, skipping insertion in model container [2018-11-23 02:07:59,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:07:59" (2/3) ... [2018-11-23 02:07:59,990 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30e6c248 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:07:59, skipping insertion in model container [2018-11-23 02:07:59,990 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:59" (3/3) ... [2018-11-23 02:07:59,992 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longest_true-unreach-call.i [2018-11-23 02:08:00,014 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,014 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,014 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,014 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,014 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe Thread1_t1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,015 WARN L317 ript$VariableManager]: TermVariabe |Thread1_t1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,016 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,017 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,017 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,017 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,017 WARN L317 ript$VariableManager]: TermVariabe Thread0_t2_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,017 WARN L317 ript$VariableManager]: TermVariabe |Thread0_t2_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2018-11-23 02:08:00,022 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2018-11-23 02:08:00,022 INFO L156 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2018-11-23 02:08:00,027 INFO L168 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2018-11-23 02:08:00,037 INFO L257 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2018-11-23 02:08:00,053 INFO L133 ementStrategyFactory]: Using default assertion order modulation [2018-11-23 02:08:00,053 INFO L382 AbstractCegarLoop]: Interprodecural is true [2018-11-23 02:08:00,053 INFO L383 AbstractCegarLoop]: Hoare is true [2018-11-23 02:08:00,054 INFO L384 AbstractCegarLoop]: Compute interpolants for FPandBP [2018-11-23 02:08:00,054 INFO L385 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2018-11-23 02:08:00,054 INFO L386 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2018-11-23 02:08:00,054 INFO L387 AbstractCegarLoop]: Difference is false [2018-11-23 02:08:00,054 INFO L388 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2018-11-23 02:08:00,054 INFO L393 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2018-11-23 02:08:00,059 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 46places, 48 transitions [2018-11-23 02:08:00,103 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 1012 states. [2018-11-23 02:08:00,106 INFO L276 IsEmpty]: Start isEmpty. Operand 1012 states. [2018-11-23 02:08:00,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2018-11-23 02:08:00,113 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:00,114 INFO L402 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:08:00,115 INFO L423 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:00,120 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:00,120 INFO L82 PathProgramCache]: Analyzing trace with hash 573491188, now seen corresponding path program 1 times [2018-11-23 02:08:00,124 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:00,125 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:00,149 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:00,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:00,208 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:00,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:00,272 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 02:08:00,276 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:08:00,276 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:08:00,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:08:00,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:08:00,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:08:00,289 INFO L87 Difference]: Start difference. First operand 1012 states. Second operand 5 states. [2018-11-23 02:08:00,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:00,417 INFO L93 Difference]: Finished difference Result 1777 states and 5125 transitions. [2018-11-23 02:08:00,418 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:08:00,420 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2018-11-23 02:08:00,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:00,433 INFO L225 Difference]: With dead ends: 1777 [2018-11-23 02:08:00,433 INFO L226 Difference]: Without dead ends: 499 [2018-11-23 02:08:00,434 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 [2018-11-23 02:08:00,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2018-11-23 02:08:00,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 387. [2018-11-23 02:08:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2018-11-23 02:08:00,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 992 transitions. [2018-11-23 02:08:00,480 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 992 transitions. Word has length 19 [2018-11-23 02:08:00,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:00,481 INFO L480 AbstractCegarLoop]: Abstraction has 387 states and 992 transitions. [2018-11-23 02:08:00,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:08:00,481 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 992 transitions. [2018-11-23 02:08:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 02:08:00,482 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:00,482 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] [2018-11-23 02:08:00,482 INFO L423 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:00,482 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:00,482 INFO L82 PathProgramCache]: Analyzing trace with hash -143811728, now seen corresponding path program 1 times [2018-11-23 02:08:00,482 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:00,483 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:00,498 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:00,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:00,529 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:00,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:00,551 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 02:08:00,552 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:08:00,552 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:08:00,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:08:00,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:08:00,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:08:00,554 INFO L87 Difference]: Start difference. First operand 387 states and 992 transitions. Second operand 5 states. [2018-11-23 02:08:00,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:00,620 INFO L93 Difference]: Finished difference Result 464 states and 1146 transitions. [2018-11-23 02:08:00,621 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:08:00,621 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-23 02:08:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:00,623 INFO L225 Difference]: With dead ends: 464 [2018-11-23 02:08:00,624 INFO L226 Difference]: Without dead ends: 343 [2018-11-23 02:08:00,624 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 [2018-11-23 02:08:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2018-11-23 02:08:00,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 319. [2018-11-23 02:08:00,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-23 02:08:00,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 814 transitions. [2018-11-23 02:08:00,638 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 814 transitions. Word has length 22 [2018-11-23 02:08:00,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:00,638 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 814 transitions. [2018-11-23 02:08:00,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:08:00,638 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 814 transitions. [2018-11-23 02:08:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2018-11-23 02:08:00,639 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:00,639 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] [2018-11-23 02:08:00,640 INFO L423 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:00,640 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:00,640 INFO L82 PathProgramCache]: Analyzing trace with hash 676041288, now seen corresponding path program 1 times [2018-11-23 02:08:00,640 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:00,640 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:00,667 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:00,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:00,696 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:00,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:00,718 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 02:08:00,719 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:08:00,719 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2018-11-23 02:08:00,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2018-11-23 02:08:00,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2018-11-23 02:08:00,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2018-11-23 02:08:00,720 INFO L87 Difference]: Start difference. First operand 319 states and 814 transitions. Second operand 5 states. [2018-11-23 02:08:00,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:00,765 INFO L93 Difference]: Finished difference Result 420 states and 1016 transitions. [2018-11-23 02:08:00,765 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2018-11-23 02:08:00,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2018-11-23 02:08:00,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:00,767 INFO L225 Difference]: With dead ends: 420 [2018-11-23 02:08:00,767 INFO L226 Difference]: Without dead ends: 290 [2018-11-23 02:08:00,768 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 [2018-11-23 02:08:00,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2018-11-23 02:08:00,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2018-11-23 02:08:00,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 290 states. [2018-11-23 02:08:00,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 714 transitions. [2018-11-23 02:08:00,776 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 714 transitions. Word has length 22 [2018-11-23 02:08:00,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:00,777 INFO L480 AbstractCegarLoop]: Abstraction has 290 states and 714 transitions. [2018-11-23 02:08:00,777 INFO L481 AbstractCegarLoop]: Interpolant automaton has 5 states. [2018-11-23 02:08:00,777 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 714 transitions. [2018-11-23 02:08:00,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 02:08:00,778 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:00,778 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] [2018-11-23 02:08:00,778 INFO L423 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:00,778 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:00,778 INFO L82 PathProgramCache]: Analyzing trace with hash 28324926, now seen corresponding path program 1 times [2018-11-23 02:08:00,779 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:00,779 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:00,807 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:00,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:00,852 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:00,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:00,895 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 02:08:00,896 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:08:00,896 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 02:08:00,896 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:08:00,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:08:00,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:08:00,897 INFO L87 Difference]: Start difference. First operand 290 states and 714 transitions. Second operand 6 states. [2018-11-23 02:08:00,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:00,995 INFO L93 Difference]: Finished difference Result 437 states and 1057 transitions. [2018-11-23 02:08:00,996 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:08:00,996 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 02:08:00,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:00,998 INFO L225 Difference]: With dead ends: 437 [2018-11-23 02:08:00,998 INFO L226 Difference]: Without dead ends: 309 [2018-11-23 02:08:00,998 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 [2018-11-23 02:08:00,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2018-11-23 02:08:01,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 299. [2018-11-23 02:08:01,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2018-11-23 02:08:01,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 732 transitions. [2018-11-23 02:08:01,004 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 732 transitions. Word has length 25 [2018-11-23 02:08:01,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:01,004 INFO L480 AbstractCegarLoop]: Abstraction has 299 states and 732 transitions. [2018-11-23 02:08:01,004 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:08:01,004 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 732 transitions. [2018-11-23 02:08:01,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2018-11-23 02:08:01,005 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:01,005 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] [2018-11-23 02:08:01,006 INFO L423 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:01,006 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:01,006 INFO L82 PathProgramCache]: Analyzing trace with hash 19387626, now seen corresponding path program 2 times [2018-11-23 02:08:01,006 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:01,006 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:01,026 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-23 02:08:01,055 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2018-11-23 02:08:01,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:01,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:01,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:01,084 INFO L312 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2018-11-23 02:08:01,086 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2018-11-23 02:08:01,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2018-11-23 02:08:01,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2018-11-23 02:08:01,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2018-11-23 02:08:01,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2018-11-23 02:08:01,087 INFO L87 Difference]: Start difference. First operand 299 states and 732 transitions. Second operand 6 states. [2018-11-23 02:08:01,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:01,162 INFO L93 Difference]: Finished difference Result 456 states and 1095 transitions. [2018-11-23 02:08:01,162 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2018-11-23 02:08:01,162 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 25 [2018-11-23 02:08:01,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:01,164 INFO L225 Difference]: With dead ends: 456 [2018-11-23 02:08:01,164 INFO L226 Difference]: Without dead ends: 319 [2018-11-23 02:08:01,164 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 [2018-11-23 02:08:01,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2018-11-23 02:08:01,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 319. [2018-11-23 02:08:01,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 319 states. [2018-11-23 02:08:01,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 772 transitions. [2018-11-23 02:08:01,172 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 772 transitions. Word has length 25 [2018-11-23 02:08:01,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:01,172 INFO L480 AbstractCegarLoop]: Abstraction has 319 states and 772 transitions. [2018-11-23 02:08:01,173 INFO L481 AbstractCegarLoop]: Interpolant automaton has 6 states. [2018-11-23 02:08:01,173 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 772 transitions. [2018-11-23 02:08:01,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 02:08:01,173 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:01,174 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] [2018-11-23 02:08:01,174 INFO L423 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:01,174 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:01,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1592611961, now seen corresponding path program 1 times [2018-11-23 02:08:01,174 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:01,174 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:01,191 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:08:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:01,228 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:01,294 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:01,418 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:01,418 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:01,429 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:01,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:01,446 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:01,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:01,451 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:01,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:01,504 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:01,504 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-11-23 02:08:01,505 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 02:08:01,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 02:08:01,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:08:01,505 INFO L87 Difference]: Start difference. First operand 319 states and 772 transitions. Second operand 11 states. [2018-11-23 02:08:01,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:01,915 INFO L93 Difference]: Finished difference Result 760 states and 1850 transitions. [2018-11-23 02:08:01,916 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2018-11-23 02:08:01,916 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-11-23 02:08:01,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:01,917 INFO L225 Difference]: With dead ends: 760 [2018-11-23 02:08:01,917 INFO L226 Difference]: Without dead ends: 383 [2018-11-23 02:08:01,918 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2018-11-23 02:08:01,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2018-11-23 02:08:01,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 351. [2018-11-23 02:08:01,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2018-11-23 02:08:01,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 836 transitions. [2018-11-23 02:08:01,927 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 836 transitions. Word has length 29 [2018-11-23 02:08:01,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:01,927 INFO L480 AbstractCegarLoop]: Abstraction has 351 states and 836 transitions. [2018-11-23 02:08:01,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 02:08:01,928 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 836 transitions. [2018-11-23 02:08:01,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2018-11-23 02:08:01,928 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:01,928 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] [2018-11-23 02:08:01,930 INFO L423 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:01,930 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:01,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2035666861, now seen corresponding path program 1 times [2018-11-23 02:08:01,930 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:01,931 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:01,956 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:01,989 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:02,022 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:02,022 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:02,113 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:02,115 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:02,116 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:02,127 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:02,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:02,141 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:02,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:02,146 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:02,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:02,183 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:02,183 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7] total 11 [2018-11-23 02:08:02,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2018-11-23 02:08:02,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2018-11-23 02:08:02,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2018-11-23 02:08:02,184 INFO L87 Difference]: Start difference. First operand 351 states and 836 transitions. Second operand 11 states. [2018-11-23 02:08:02,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:02,668 INFO L93 Difference]: Finished difference Result 824 states and 1978 transitions. [2018-11-23 02:08:02,669 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2018-11-23 02:08:02,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 29 [2018-11-23 02:08:02,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:02,671 INFO L225 Difference]: With dead ends: 824 [2018-11-23 02:08:02,671 INFO L226 Difference]: Without dead ends: 447 [2018-11-23 02:08:02,671 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2018-11-23 02:08:02,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2018-11-23 02:08:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2018-11-23 02:08:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-23 02:08:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-23 02:08:02,679 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 29 [2018-11-23 02:08:02,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:02,680 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-23 02:08:02,680 INFO L481 AbstractCegarLoop]: Interpolant automaton has 11 states. [2018-11-23 02:08:02,680 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-23 02:08:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2018-11-23 02:08:02,681 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:02,681 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] [2018-11-23 02:08:02,682 INFO L423 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:02,682 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:02,682 INFO L82 PathProgramCache]: Analyzing trace with hash -956668217, now seen corresponding path program 1 times [2018-11-23 02:08:02,682 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:02,682 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:02,708 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:02,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:02,788 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:02,841 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:02,841 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:03,032 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:03,033 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:03,033 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:03,041 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:08:03,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:08:03,059 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:03,063 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:03,063 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:03,089 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:03,104 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:03,105 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10, 10] total 17 [2018-11-23 02:08:03,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2018-11-23 02:08:03,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2018-11-23 02:08:03,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2018-11-23 02:08:03,105 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 17 states. [2018-11-23 02:08:04,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:04,291 INFO L93 Difference]: Finished difference Result 1302 states and 3081 transitions. [2018-11-23 02:08:04,291 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2018-11-23 02:08:04,291 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2018-11-23 02:08:04,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:04,294 INFO L225 Difference]: With dead ends: 1302 [2018-11-23 02:08:04,294 INFO L226 Difference]: Without dead ends: 643 [2018-11-23 02:08:04,295 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 160 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=324, Invalid=936, Unknown=0, NotChecked=0, Total=1260 [2018-11-23 02:08:04,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2018-11-23 02:08:04,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 447. [2018-11-23 02:08:04,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2018-11-23 02:08:04,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1028 transitions. [2018-11-23 02:08:04,305 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1028 transitions. Word has length 45 [2018-11-23 02:08:04,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:04,305 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 1028 transitions. [2018-11-23 02:08:04,305 INFO L481 AbstractCegarLoop]: Interpolant automaton has 17 states. [2018-11-23 02:08:04,305 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1028 transitions. [2018-11-23 02:08:04,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2018-11-23 02:08:04,306 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:04,306 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] [2018-11-23 02:08:04,307 INFO L423 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:04,307 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:04,307 INFO L82 PathProgramCache]: Analyzing trace with hash 39711850, now seen corresponding path program 2 times [2018-11-23 02:08:04,307 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:04,307 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:04,324 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2018-11-23 02:08:04,398 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:08:04,398 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:04,410 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:04,502 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:04,502 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:04,932 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:04,933 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:04,934 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:04,942 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2018-11-23 02:08:04,967 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2018-11-23 02:08:04,967 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:04,971 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:04,979 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:05,014 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:05,014 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14, 14] total 25 [2018-11-23 02:08:05,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2018-11-23 02:08:05,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2018-11-23 02:08:05,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2018-11-23 02:08:05,015 INFO L87 Difference]: Start difference. First operand 447 states and 1028 transitions. Second operand 25 states. [2018-11-23 02:08:07,195 WARN L180 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-11-23 02:08:07,437 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-23 02:08:07,692 WARN L180 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-11-23 02:08:07,953 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-11-23 02:08:09,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:09,054 INFO L93 Difference]: Finished difference Result 1718 states and 4109 transitions. [2018-11-23 02:08:09,054 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2018-11-23 02:08:09,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 57 [2018-11-23 02:08:09,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:09,056 INFO L225 Difference]: With dead ends: 1718 [2018-11-23 02:08:09,056 INFO L226 Difference]: Without dead ends: 767 [2018-11-23 02:08:09,057 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 201 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 563 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=758, Invalid=2434, Unknown=0, NotChecked=0, Total=3192 [2018-11-23 02:08:09,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2018-11-23 02:08:09,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 767. [2018-11-23 02:08:09,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 767 states. [2018-11-23 02:08:09,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 767 states to 767 states and 1668 transitions. [2018-11-23 02:08:09,070 INFO L78 Accepts]: Start accepts. Automaton has 767 states and 1668 transitions. Word has length 57 [2018-11-23 02:08:09,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:09,070 INFO L480 AbstractCegarLoop]: Abstraction has 767 states and 1668 transitions. [2018-11-23 02:08:09,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has 25 states. [2018-11-23 02:08:09,070 INFO L276 IsEmpty]: Start isEmpty. Operand 767 states and 1668 transitions. [2018-11-23 02:08:09,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2018-11-23 02:08:09,071 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:09,072 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] [2018-11-23 02:08:09,072 INFO L423 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:09,072 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:09,072 INFO L82 PathProgramCache]: Analyzing trace with hash 690225639, now seen corresponding path program 3 times [2018-11-23 02:08:09,072 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:09,072 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:09,098 INFO L101 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2018-11-23 02:08:09,549 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 02:08:09,549 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:09,573 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:09,707 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:10,414 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:10,416 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:10,416 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:10,425 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2018-11-23 02:08:10,494 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2018-11-23 02:08:10,494 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:10,498 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:10,509 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:10,510 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:10,529 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 111 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:08:10,546 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:10,546 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17, 17] total 31 [2018-11-23 02:08:10,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2018-11-23 02:08:10,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2018-11-23 02:08:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2018-11-23 02:08:10,547 INFO L87 Difference]: Start difference. First operand 767 states and 1668 transitions. Second operand 31 states. [2018-11-23 02:08:11,271 WARN L180 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-11-23 02:08:11,653 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-11-23 02:08:11,992 WARN L180 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-11-23 02:08:12,350 WARN L180 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-11-23 02:08:12,711 WARN L180 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-11-23 02:08:13,381 WARN L180 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-11-23 02:08:14,093 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-11-23 02:08:14,779 WARN L180 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-23 02:08:15,441 WARN L180 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 21 [2018-11-23 02:08:16,056 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 21 [2018-11-23 02:08:16,611 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 21 [2018-11-23 02:08:18,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:18,211 INFO L93 Difference]: Finished difference Result 2360 states and 5540 transitions. [2018-11-23 02:08:18,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2018-11-23 02:08:18,212 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 69 [2018-11-23 02:08:18,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:18,215 INFO L225 Difference]: With dead ends: 2360 [2018-11-23 02:08:18,215 INFO L226 Difference]: Without dead ends: 1139 [2018-11-23 02:08:18,216 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=1140, Invalid=3830, Unknown=0, NotChecked=0, Total=4970 [2018-11-23 02:08:18,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1139 states. [2018-11-23 02:08:18,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1139 to 671. [2018-11-23 02:08:18,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 671 states. [2018-11-23 02:08:18,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 671 states to 671 states and 1476 transitions. [2018-11-23 02:08:18,226 INFO L78 Accepts]: Start accepts. Automaton has 671 states and 1476 transitions. Word has length 69 [2018-11-23 02:08:18,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:18,226 INFO L480 AbstractCegarLoop]: Abstraction has 671 states and 1476 transitions. [2018-11-23 02:08:18,226 INFO L481 AbstractCegarLoop]: Interpolant automaton has 31 states. [2018-11-23 02:08:18,226 INFO L276 IsEmpty]: Start isEmpty. Operand 671 states and 1476 transitions. [2018-11-23 02:08:18,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2018-11-23 02:08:18,228 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:18,228 INFO L402 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:08:18,228 INFO L423 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:18,229 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:18,229 INFO L82 PathProgramCache]: Analyzing trace with hash 831344650, now seen corresponding path program 4 times [2018-11-23 02:08:18,229 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:18,229 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:18,247 INFO L101 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:08:18,354 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:08:18,354 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:18,389 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:18,719 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:18,719 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:20,711 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:20,713 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:20,713 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/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 [2018-11-23 02:08:20,722 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2018-11-23 02:08:20,767 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2018-11-23 02:08:20,767 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:20,773 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:20,790 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:20,791 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:20,842 INFO L134 CoverageAnalysis]: Checked inductivity of 466 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:20,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:20,871 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27, 27] total 51 [2018-11-23 02:08:20,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 51 states [2018-11-23 02:08:20,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2018-11-23 02:08:20,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=2176, Unknown=0, NotChecked=0, Total=2550 [2018-11-23 02:08:20,873 INFO L87 Difference]: Start difference. First operand 671 states and 1476 transitions. Second operand 51 states. [2018-11-23 02:08:21,431 WARN L180 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 11 [2018-11-23 02:08:21,846 WARN L180 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 14 [2018-11-23 02:08:22,978 WARN L180 SmtUtils]: Spent 411.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 18 [2018-11-23 02:08:23,916 WARN L180 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-11-23 02:08:24,982 WARN L180 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-11-23 02:08:25,956 WARN L180 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-11-23 02:08:26,904 WARN L180 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-11-23 02:08:27,843 WARN L180 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-11-23 02:08:28,693 WARN L180 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-11-23 02:08:29,562 WARN L180 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-11-23 02:08:30,402 WARN L180 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-11-23 02:08:31,225 WARN L180 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-11-23 02:08:31,985 WARN L180 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-11-23 02:08:32,768 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-11-23 02:08:33,476 WARN L180 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-11-23 02:08:34,173 WARN L180 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 16 [2018-11-23 02:08:34,822 WARN L180 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 16 [2018-11-23 02:08:35,453 WARN L180 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 16 [2018-11-23 02:08:38,178 WARN L180 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-11-23 02:08:38,733 WARN L180 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-11-23 02:08:39,266 WARN L180 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-11-23 02:08:39,804 WARN L180 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-11-23 02:08:40,285 WARN L180 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-11-23 02:08:40,781 WARN L180 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-11-23 02:08:41,215 WARN L180 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-23 02:08:43,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:08:43,748 INFO L93 Difference]: Finished difference Result 3134 states and 7235 transitions. [2018-11-23 02:08:43,749 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2018-11-23 02:08:43,749 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 113 [2018-11-23 02:08:43,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:08:43,752 INFO L225 Difference]: With dead ends: 3134 [2018-11-23 02:08:43,752 INFO L226 Difference]: Without dead ends: 1679 [2018-11-23 02:08:43,754 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 399 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2375 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=2576, Invalid=10306, Unknown=0, NotChecked=0, Total=12882 [2018-11-23 02:08:43,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1679 states. [2018-11-23 02:08:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1679 to 1295. [2018-11-23 02:08:43,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1295 states. [2018-11-23 02:08:43,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1295 states to 1295 states and 2724 transitions. [2018-11-23 02:08:43,769 INFO L78 Accepts]: Start accepts. Automaton has 1295 states and 2724 transitions. Word has length 113 [2018-11-23 02:08:43,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:08:43,769 INFO L480 AbstractCegarLoop]: Abstraction has 1295 states and 2724 transitions. [2018-11-23 02:08:43,770 INFO L481 AbstractCegarLoop]: Interpolant automaton has 51 states. [2018-11-23 02:08:43,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1295 states and 2724 transitions. [2018-11-23 02:08:43,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2018-11-23 02:08:43,772 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:08:43,772 INFO L402 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:08:43,772 INFO L423 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:08:43,772 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:08:43,772 INFO L82 PathProgramCache]: Analyzing trace with hash 739295879, now seen corresponding path program 5 times [2018-11-23 02:08:43,772 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:08:43,773 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:08:43,793 INFO L101 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2018-11-23 02:08:44,489 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-23 02:08:44,489 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:44,518 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:44,844 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:44,844 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:46,970 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:08:46,970 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:08:46,977 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2018-11-23 02:08:47,066 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2018-11-23 02:08:47,066 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:08:47,071 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:08:47,089 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:47,090 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:08:47,173 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 0 proven. 597 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2018-11-23 02:08:47,189 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:08:47,189 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30, 30] total 57 [2018-11-23 02:08:47,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 57 states [2018-11-23 02:08:47,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2018-11-23 02:08:47,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=2744, Unknown=0, NotChecked=0, Total=3192 [2018-11-23 02:08:47,190 INFO L87 Difference]: Start difference. First operand 1295 states and 2724 transitions. Second operand 57 states. [2018-11-23 02:08:48,831 WARN L180 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-11-23 02:08:49,457 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-11-23 02:08:50,079 WARN L180 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-11-23 02:08:50,704 WARN L180 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-11-23 02:08:51,281 WARN L180 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-11-23 02:08:51,869 WARN L180 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 21 [2018-11-23 02:08:52,497 WARN L180 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 21 [2018-11-23 02:08:53,052 WARN L180 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-11-23 02:08:53,630 WARN L180 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 21 [2018-11-23 02:08:54,706 WARN L180 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 21 [2018-11-23 02:08:55,705 WARN L180 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 21 [2018-11-23 02:08:56,723 WARN L180 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 21 [2018-11-23 02:08:57,608 WARN L180 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 21 [2018-11-23 02:09:01,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:09:01,926 INFO L93 Difference]: Finished difference Result 3230 states and 7427 transitions. [2018-11-23 02:09:01,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2018-11-23 02:09:01,927 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 125 [2018-11-23 02:09:01,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:09:01,930 INFO L225 Difference]: With dead ends: 3230 [2018-11-23 02:09:01,930 INFO L226 Difference]: Without dead ends: 1775 [2018-11-23 02:09:01,932 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 440 SyntacticMatches, 1 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2184 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=2465, Invalid=10875, Unknown=0, NotChecked=0, Total=13340 [2018-11-23 02:09:01,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1775 states. [2018-11-23 02:09:01,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1775 to 927. [2018-11-23 02:09:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 927 states. [2018-11-23 02:09:01,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 927 states to 927 states and 1988 transitions. [2018-11-23 02:09:01,940 INFO L78 Accepts]: Start accepts. Automaton has 927 states and 1988 transitions. Word has length 125 [2018-11-23 02:09:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:09:01,941 INFO L480 AbstractCegarLoop]: Abstraction has 927 states and 1988 transitions. [2018-11-23 02:09:01,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has 57 states. [2018-11-23 02:09:01,941 INFO L276 IsEmpty]: Start isEmpty. Operand 927 states and 1988 transitions. [2018-11-23 02:09:01,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2018-11-23 02:09:01,942 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:09:01,942 INFO L402 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:09:01,943 INFO L423 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:09:01,943 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:09:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 326351498, now seen corresponding path program 6 times [2018-11-23 02:09:01,943 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:09:01,943 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:09:01,957 INFO L101 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2018-11-23 02:09:04,123 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-23 02:09:04,123 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:09:04,191 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:09:04,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:09:04,921 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:09:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:09:09,371 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:09:09,372 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:09:09,379 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2018-11-23 02:09:09,597 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2018-11-23 02:09:09,598 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2018-11-23 02:09:09,606 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:09:09,624 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:09:09,624 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:09:09,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1406 backedges. 0 proven. 1406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:09:09,702 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:09:09,702 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44, 44] total 85 [2018-11-23 02:09:09,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 85 states [2018-11-23 02:09:09,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2018-11-23 02:09:09,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=6550, Unknown=0, NotChecked=0, Total=7140 [2018-11-23 02:09:09,704 INFO L87 Difference]: Start difference. First operand 927 states and 1988 transitions. Second operand 85 states. [2018-11-23 02:09:10,831 WARN L180 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 161 DAG size of output: 9 [2018-11-23 02:09:11,644 WARN L180 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 165 DAG size of output: 12 [2018-11-23 02:09:13,733 WARN L180 SmtUtils]: Spent 796.00 ms on a formula simplification. DAG size of input: 278 DAG size of output: 16 [2018-11-23 02:09:15,800 WARN L180 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 271 DAG size of output: 16 [2018-11-23 02:09:17,981 WARN L180 SmtUtils]: Spent 717.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 16 [2018-11-23 02:09:20,212 WARN L180 SmtUtils]: Spent 706.00 ms on a formula simplification. DAG size of input: 257 DAG size of output: 16 [2018-11-23 02:09:22,269 WARN L180 SmtUtils]: Spent 572.00 ms on a formula simplification. DAG size of input: 250 DAG size of output: 16 [2018-11-23 02:09:24,465 WARN L180 SmtUtils]: Spent 622.00 ms on a formula simplification. DAG size of input: 243 DAG size of output: 16 [2018-11-23 02:09:26,725 WARN L180 SmtUtils]: Spent 566.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 16 [2018-11-23 02:09:29,049 WARN L180 SmtUtils]: Spent 644.00 ms on a formula simplification. DAG size of input: 229 DAG size of output: 16 [2018-11-23 02:09:31,328 WARN L180 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 222 DAG size of output: 16 [2018-11-23 02:09:33,789 WARN L180 SmtUtils]: Spent 570.00 ms on a formula simplification. DAG size of input: 215 DAG size of output: 16 [2018-11-23 02:09:36,112 WARN L180 SmtUtils]: Spent 521.00 ms on a formula simplification. DAG size of input: 208 DAG size of output: 16 [2018-11-23 02:09:38,406 WARN L180 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 201 DAG size of output: 16 [2018-11-23 02:09:40,766 WARN L180 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 16 [2018-11-23 02:09:43,055 WARN L180 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 187 DAG size of output: 16 [2018-11-23 02:09:45,090 WARN L180 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 180 DAG size of output: 16 [2018-11-23 02:09:47,508 WARN L180 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 16 [2018-11-23 02:09:49,928 WARN L180 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 166 DAG size of output: 16 [2018-11-23 02:09:52,223 WARN L180 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 159 DAG size of output: 16 [2018-11-23 02:09:54,437 WARN L180 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 16 [2018-11-23 02:09:56,609 WARN L180 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 16 [2018-11-23 02:09:58,660 WARN L180 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 16 [2018-11-23 02:10:00,644 WARN L180 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 16 [2018-11-23 02:10:02,416 WARN L180 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 16 [2018-11-23 02:10:04,110 WARN L180 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 16 [2018-11-23 02:10:05,715 WARN L180 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 16 [2018-11-23 02:10:07,245 WARN L180 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 16 [2018-11-23 02:10:08,630 WARN L180 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 16 [2018-11-23 02:10:10,059 WARN L180 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 16 [2018-11-23 02:10:11,314 WARN L180 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 16 [2018-11-23 02:10:12,467 WARN L180 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 16 [2018-11-23 02:10:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:10:19,101 INFO L93 Difference]: Finished difference Result 1698 states and 3579 transitions. [2018-11-23 02:10:19,102 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2018-11-23 02:10:19,102 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 177 [2018-11-23 02:10:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:10:19,104 INFO L225 Difference]: With dead ends: 1698 [2018-11-23 02:10:19,104 INFO L226 Difference]: Without dead ends: 1567 [2018-11-23 02:10:19,107 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 785 GetRequests, 621 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4879 ImplicationChecksByTransitivity, 71.3s TimeCoverageRelationStatistics Valid=4180, Invalid=23210, Unknown=0, NotChecked=0, Total=27390 [2018-11-23 02:10:19,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1567 states. [2018-11-23 02:10:19,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1567 to 1567. [2018-11-23 02:10:19,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1567 states. [2018-11-23 02:10:19,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1567 states to 1567 states and 3268 transitions. [2018-11-23 02:10:19,122 INFO L78 Accepts]: Start accepts. Automaton has 1567 states and 3268 transitions. Word has length 177 [2018-11-23 02:10:19,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:10:19,122 INFO L480 AbstractCegarLoop]: Abstraction has 1567 states and 3268 transitions. [2018-11-23 02:10:19,122 INFO L481 AbstractCegarLoop]: Interpolant automaton has 85 states. [2018-11-23 02:10:19,122 INFO L276 IsEmpty]: Start isEmpty. Operand 1567 states and 3268 transitions. [2018-11-23 02:10:19,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2018-11-23 02:10:19,126 INFO L394 BasicCegarLoop]: Found error trace [2018-11-23 02:10:19,126 INFO L402 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2018-11-23 02:10:19,126 INFO L423 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2018-11-23 02:10:19,126 INFO L141 PredicateUnifier]: Initialized classic predicate unifier [2018-11-23 02:10:19,126 INFO L82 PathProgramCache]: Analyzing trace with hash 301327693, now seen corresponding path program 7 times [2018-11-23 02:10:19,127 INFO L223 ckRefinementStrategy]: Switched to mode CVC4_FPBP [2018-11-23 02:10:19,127 INFO L69 tionRefinementEngine]: Using refinement strategy WalrusRefinementStrategy No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/cvc4nyu Starting monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with cvc4nyu --tear-down-incremental --print-success --lang smt --rewrite-divk [2018-11-23 02:10:19,150 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2018-11-23 02:10:19,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:10:19,356 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:10:20,055 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:10:20,056 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:10:24,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:10:24,063 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2018-11-23 02:10:24,063 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FPBP No working directory specified, using /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2018-11-23 02:10:24,072 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2018-11-23 02:10:24,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2018-11-23 02:10:24,134 INFO L273 TraceCheckSpWp]: Computing forward predicates... [2018-11-23 02:10:24,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:10:24,157 INFO L316 TraceCheckSpWp]: Computing backward predicates... [2018-11-23 02:10:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 1483 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2018-11-23 02:10:24,205 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 4 imperfect interpolant sequences. [2018-11-23 02:10:24,206 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43, 43] total 84 [2018-11-23 02:10:24,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 84 states [2018-11-23 02:10:24,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2018-11-23 02:10:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=6366, Unknown=0, NotChecked=0, Total=6972 [2018-11-23 02:10:24,207 INFO L87 Difference]: Start difference. First operand 1567 states and 3268 transitions. Second operand 84 states. [2018-11-23 02:10:26,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2018-11-23 02:10:26,983 INFO L93 Difference]: Finished difference Result 13655 states and 26972 transitions. [2018-11-23 02:10:26,983 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2018-11-23 02:10:26,983 INFO L78 Accepts]: Start accepts. Automaton has 84 states. Word has length 181 [2018-11-23 02:10:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2018-11-23 02:10:26,984 INFO L225 Difference]: With dead ends: 13655 [2018-11-23 02:10:26,984 INFO L226 Difference]: Without dead ends: 0 [2018-11-23 02:10:26,984 INFO L631 BasicCegarLoop]: 0 DeclaredPredicates, 800 GetRequests, 678 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1626, Invalid=13626, Unknown=0, NotChecked=0, Total=15252 [2018-11-23 02:10:26,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2018-11-23 02:10:26,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2018-11-23 02:10:26,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2018-11-23 02:10:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2018-11-23 02:10:26,985 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 181 [2018-11-23 02:10:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2018-11-23 02:10:26,985 INFO L480 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2018-11-23 02:10:26,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has 84 states. [2018-11-23 02:10:26,985 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2018-11-23 02:10:26,985 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2018-11-23 02:10:26,987 INFO L305 ceAbstractionStarter]: Did not count any witness invariants because Icfg is not BoogieIcfg [2018-11-23 02:10:26,988 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 02:10:26 BasicIcfg [2018-11-23 02:10:26,988 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2018-11-23 02:10:26,988 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2018-11-23 02:10:26,988 INFO L271 PluginConnector]: Initializing Witness Printer... [2018-11-23 02:10:26,988 INFO L276 PluginConnector]: Witness Printer initialized [2018-11-23 02:10:26,989 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:07:59" (3/4) ... [2018-11-23 02:10:26,991 INFO L144 WitnessPrinter]: Generating witness for correct program [2018-11-23 02:10:26,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2018-11-23 02:10:26,995 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2018-11-23 02:10:26,997 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 10 nodes and edges [2018-11-23 02:10:26,997 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2018-11-23 02:10:26,997 INFO L879 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2018-11-23 02:10:27,023 INFO L145 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/working_dir_5a9f687f-c180-483a-8fb3-dbd87f9182ee/bin-2019/utaipan/witness.graphml [2018-11-23 02:10:27,023 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2018-11-23 02:10:27,023 INFO L168 Benchmark]: Toolchain (without parser) took 147730.97 ms. Allocated memory was 1.0 GB in the beginning and 1.3 GB in the end (delta: 266.3 MB). Free memory was 945.4 MB in the beginning and 1.2 GB in the end (delta: -237.4 MB). Peak memory consumption was 28.9 MB. Max. memory is 11.5 GB. [2018-11-23 02:10:27,024 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:10:27,024 INFO L168 Benchmark]: CACSL2BoogieTranslator took 419.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.4 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 40.0 MB. Max. memory is 11.5 GB. [2018-11-23 02:10:27,024 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.71 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. [2018-11-23 02:10:27,025 INFO L168 Benchmark]: Boogie Preprocessor took 17.81 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. [2018-11-23 02:10:27,025 INFO L168 Benchmark]: RCFGBuilder took 226.46 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. [2018-11-23 02:10:27,025 INFO L168 Benchmark]: TraceAbstraction took 147000.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 130.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -105.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. [2018-11-23 02:10:27,026 INFO L168 Benchmark]: Witness Printer took 34.39 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. [2018-11-23 02:10:27,027 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 1.0 GB. Free memory is still 978.7 MB. There was no memory consumed. Max. memory is 11.5 GB. * CACSL2BoogieTranslator took 419.81 ms. Allocated memory was 1.0 GB in the beginning and 1.2 GB in the end (delta: 136.3 MB). Free memory was 945.4 MB in the beginning and 1.1 GB in the end (delta: -176.8 MB). Peak memory consumption was 40.0 MB. Max. memory is 11.5 GB. * Boogie Procedure Inliner took 28.71 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: 6.8 MB). Peak memory consumption was 6.8 MB. Max. memory is 11.5 GB. * Boogie Preprocessor took 17.81 ms. Allocated memory is still 1.2 GB. Free memory is still 1.1 GB. There was no memory consumed. Max. memory is 11.5 GB. * RCFGBuilder took 226.46 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: 31.7 MB). Peak memory consumption was 31.7 MB. Max. memory is 11.5 GB. * TraceAbstraction took 147000.54 ms. Allocated memory was 1.2 GB in the beginning and 1.3 GB in the end (delta: 130.0 MB). Free memory was 1.1 GB in the beginning and 1.2 GB in the end (delta: -105.9 MB). Peak memory consumption was 24.1 MB. Max. memory is 11.5 GB. * Witness Printer took 34.39 ms. Allocated memory is still 1.3 GB. Free memory is still 1.2 GB. There was no memory consumed. Max. memory is 11.5 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 688]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 64 locations, 1 error locations. SAFE Result, 146.9s OverallTime, 14 OverallIterations, 21 TraceHistogramMax, 124.0s AutomataDifference, 0.0s DeadEndRemovalTime, 0.0s HoareAnnotationTime, HoareTripleCheckerStatistics: 1851 SDtfs, 18722 SDslu, 46714 SDs, 0 SdLazy, 10991 SolverSat, 2691 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3775 GetRequests, 3038 SyntacticMatches, 3 SemanticMatches, 734 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12474 ImplicationChecksByTransitivity, 131.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1567occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s AbstIntTime, 0 AbstIntIterations, 0 AbstIntStrong, NaN AbsIntWeakeningRatio, NaN AbsIntAvgWeakeningVarsNumRemoved, NaN AbsIntAvgWeakenedConjuncts, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 14 MinimizatonAttempts, 2074 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TraceCheckStatistics: 0.1s SsaConstructionTime, 4.3s SatisfiabilityAnalysisTime, 17.4s InterpolantComputationTime, 1763 NumberOfCodeBlocks, 1763 NumberOfCodeBlocksAsserted, 99 NumberOfCheckSat, 3372 ConstructedInterpolants, 0 QuantifiedInterpolants, 2784124 SizeOfPredicates, 400 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 423 ConjunctsInUnsatCore, 41 InterpolantComputations, 5 PerfectInterpolantSequences, 48/16584 InterpolantCoveringCapability, InvariantSynthesisStatistics: No data available, InterpolantConsolidationStatistics: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...