./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3eebd0d696af164582cbeee8be4a910d35e299c .......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash f3eebd0d696af164582cbeee8be4a910d35e299c ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:46:44,636 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:46:44,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:46:44,699 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:46:44,700 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:46:44,701 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:46:44,727 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:46:44,730 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:46:44,732 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:46:44,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:46:44,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:46:44,736 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:46:44,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:46:44,738 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:46:44,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:46:44,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:46:44,742 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:46:44,743 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:46:44,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:46:44,747 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:46:44,749 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:46:44,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:46:44,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:46:44,758 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:46:44,772 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:46:44,773 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:46:44,773 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:46:44,774 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:46:44,775 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:46:44,776 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:46:44,776 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:46:44,777 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:46:44,778 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:46:44,779 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:46:44,780 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:46:44,781 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:46:44,782 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:46:44,784 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:46:44,785 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:46:44,786 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:46:44,787 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:46:44,790 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:46:44,832 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:46:44,833 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:46:44,834 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:46:44,835 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:46:44,835 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:46:44,835 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:46:44,835 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:46:44,836 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:46:44,836 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:46:44,836 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:46:44,837 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:46:44,838 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:46:44,838 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:46:44,838 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:46:44,838 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:46:44,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:46:44,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:46:44,840 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:46:44,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:46:44,840 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:46:44,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:46:44,841 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:46:44,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:46:44,841 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:46:44,841 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:46:44,841 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:46:44,843 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:46:44,843 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:46:44,844 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:46:44,844 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:46:44,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:46:44,845 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:46:44,845 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:46:44,845 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:46:44,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:46:44,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:46:44,846 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:46:44,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:46:44,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:46:44,846 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:46:44,847 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3eebd0d696af164582cbeee8be4a910d35e299c [2020-11-30 02:46:45,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:46:45,134 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:46:45,136 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:46:45,138 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:46:45,141 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:46:45,142 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-11-30 02:46:45,220 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/94d91f23c/eb163ac3dc9049169a7846921a221ea7/FLAGa48c5f6e2 [2020-11-30 02:46:45,769 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:46:45,770 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-11-30 02:46:45,783 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/94d91f23c/eb163ac3dc9049169a7846921a221ea7/FLAGa48c5f6e2 [2020-11-30 02:46:46,050 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/94d91f23c/eb163ac3dc9049169a7846921a221ea7 [2020-11-30 02:46:46,052 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:46:46,053 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:46:46,064 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:46:46,064 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:46:46,068 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:46:46,069 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,071 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e89a77b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46, skipping insertion in model container [2020-11-30 02:46:46,071 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,083 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:46:46,120 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:46:46,423 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:46:46,431 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:46:46,470 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:46:46,521 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:46:46,522 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46 WrapperNode [2020-11-30 02:46:46,522 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:46:46,523 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:46:46,523 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:46:46,523 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:46:46,531 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,544 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,565 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:46:46,566 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:46:46,566 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:46:46,567 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:46:46,574 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,575 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,578 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,578 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,584 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,588 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,590 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... [2020-11-30 02:46:46,592 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:46:46,593 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:46:46,593 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:46:46,594 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:46:46,606 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:46:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:46:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:46:46,695 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:46:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:46:46,696 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:46:46,696 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:46:47,510 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:46:47,511 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:46:47,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:46:47 BoogieIcfgContainer [2020-11-30 02:46:47,513 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:46:47,515 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:46:47,515 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:46:47,518 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:46:47,518 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:46:46" (1/3) ... [2020-11-30 02:46:47,519 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6205ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:46:47, skipping insertion in model container [2020-11-30 02:46:47,519 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:46:46" (2/3) ... [2020-11-30 02:46:47,520 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e6205ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:46:47, skipping insertion in model container [2020-11-30 02:46:47,520 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:46:47" (3/3) ... [2020-11-30 02:46:47,521 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2020-11-30 02:46:47,532 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:46:47,536 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 02:46:47,547 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 02:46:47,568 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:46:47,568 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:46:47,568 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:46:47,568 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:46:47,568 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:46:47,568 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:46:47,569 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:46:47,569 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:46:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states. [2020-11-30 02:46:47,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:46:47,592 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:47,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:46:47,594 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:47,601 INFO L82 PathProgramCache]: Analyzing trace with hash 154498, now seen corresponding path program 1 times [2020-11-30 02:46:47,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:47,612 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090892505] [2020-11-30 02:46:47,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:47,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:47,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090892505] [2020-11-30 02:46:47,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:47,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:46:47,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089232192] [2020-11-30 02:46:47,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:46:47,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:47,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:46:47,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:47,822 INFO L87 Difference]: Start difference. First operand 39 states. Second operand 3 states. [2020-11-30 02:46:47,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:47,919 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-11-30 02:46:47,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:46:47,921 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 02:46:47,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:47,932 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:46:47,932 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:46:47,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:47,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:46:47,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-11-30 02:46:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 02:46:47,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2020-11-30 02:46:47,986 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 3 [2020-11-30 02:46:47,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:47,986 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2020-11-30 02:46:47,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:46:47,986 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2020-11-30 02:46:47,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 02:46:47,987 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:47,987 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 02:46:47,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:46:47,988 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:47,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:47,989 INFO L82 PathProgramCache]: Analyzing trace with hash 154499, now seen corresponding path program 1 times [2020-11-30 02:46:47,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:47,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027307144] [2020-11-30 02:46:47,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:48,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027307144] [2020-11-30 02:46:48,117 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:48,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:46:48,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317902735] [2020-11-30 02:46:48,118 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:48,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:48,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:48,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:48,119 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand 4 states. [2020-11-30 02:46:48,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:48,222 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2020-11-30 02:46:48,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:48,223 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 02:46:48,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:48,224 INFO L225 Difference]: With dead ends: 35 [2020-11-30 02:46:48,224 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:46:48,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:48,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:46:48,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-11-30 02:46:48,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 02:46:48,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2020-11-30 02:46:48,230 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 3 [2020-11-30 02:46:48,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:48,230 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2020-11-30 02:46:48,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:48,231 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2020-11-30 02:46:48,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:46:48,231 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:48,231 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:46:48,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:46:48,232 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:48,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:48,233 INFO L82 PathProgramCache]: Analyzing trace with hash 4886077, now seen corresponding path program 1 times [2020-11-30 02:46:48,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:48,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073978899] [2020-11-30 02:46:48,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:48,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073978899] [2020-11-30 02:46:48,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:48,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:46:48,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537254705] [2020-11-30 02:46:48,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:46:48,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:48,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:46:48,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:48,272 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand 3 states. [2020-11-30 02:46:48,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:48,510 INFO L93 Difference]: Finished difference Result 33 states and 38 transitions. [2020-11-30 02:46:48,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:46:48,511 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:46:48,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:48,512 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:46:48,512 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:46:48,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:48,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:46:48,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 02:46:48,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 02:46:48,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 38 transitions. [2020-11-30 02:46:48,517 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 38 transitions. Word has length 4 [2020-11-30 02:46:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:48,517 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 38 transitions. [2020-11-30 02:46:48,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:46:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 38 transitions. [2020-11-30 02:46:48,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:46:48,518 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:48,518 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:46:48,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:46:48,518 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:48,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:48,519 INFO L82 PathProgramCache]: Analyzing trace with hash 4886078, now seen corresponding path program 1 times [2020-11-30 02:46:48,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:48,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161389440] [2020-11-30 02:46:48,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:48,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:48,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161389440] [2020-11-30 02:46:48,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:48,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:48,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760549644] [2020-11-30 02:46:48,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:46:48,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:48,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:46:48,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:48,610 INFO L87 Difference]: Start difference. First operand 33 states and 38 transitions. Second operand 5 states. [2020-11-30 02:46:48,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:48,757 INFO L93 Difference]: Finished difference Result 62 states and 71 transitions. [2020-11-30 02:46:48,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:46:48,759 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 4 [2020-11-30 02:46:48,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:48,760 INFO L225 Difference]: With dead ends: 62 [2020-11-30 02:46:48,760 INFO L226 Difference]: Without dead ends: 62 [2020-11-30 02:46:48,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:46:48,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-30 02:46:48,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 35. [2020-11-30 02:46:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-30 02:46:48,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-30 02:46:48,764 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 4 [2020-11-30 02:46:48,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:48,765 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-30 02:46:48,765 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:46:48,765 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-30 02:46:48,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:46:48,765 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:48,765 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:46:48,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:46:48,765 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:48,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:48,766 INFO L82 PathProgramCache]: Analyzing trace with hash 4888660, now seen corresponding path program 1 times [2020-11-30 02:46:48,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:48,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781090932] [2020-11-30 02:46:48,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:48,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:48,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:48,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781090932] [2020-11-30 02:46:48,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:48,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:46:48,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739374939] [2020-11-30 02:46:48,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:46:48,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:48,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:46:48,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:48,861 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 3 states. [2020-11-30 02:46:48,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:48,928 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2020-11-30 02:46:48,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:46:48,928 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2020-11-30 02:46:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:48,929 INFO L225 Difference]: With dead ends: 34 [2020-11-30 02:46:48,929 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 02:46:48,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:48,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 02:46:48,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2020-11-30 02:46:48,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:46:48,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2020-11-30 02:46:48,934 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 4 [2020-11-30 02:46:48,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:48,934 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2020-11-30 02:46:48,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:46:48,935 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2020-11-30 02:46:48,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:46:48,935 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:48,935 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:46:48,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:46:48,936 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:48,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:48,936 INFO L82 PathProgramCache]: Analyzing trace with hash 151548454, now seen corresponding path program 1 times [2020-11-30 02:46:48,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:48,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553747343] [2020-11-30 02:46:48,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:48,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:49,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:49,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553747343] [2020-11-30 02:46:49,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:49,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:46:49,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033969656] [2020-11-30 02:46:49,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:46:49,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:49,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:46:49,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:49,041 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand 3 states. [2020-11-30 02:46:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:49,085 INFO L93 Difference]: Finished difference Result 33 states and 39 transitions. [2020-11-30 02:46:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:46:49,085 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:46:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:49,086 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:46:49,086 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:46:49,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:46:49,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:46:49,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-30 02:46:49,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-30 02:46:49,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 39 transitions. [2020-11-30 02:46:49,090 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 39 transitions. Word has length 5 [2020-11-30 02:46:49,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:49,091 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 39 transitions. [2020-11-30 02:46:49,091 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:46:49,091 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 39 transitions. [2020-11-30 02:46:49,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 02:46:49,091 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:49,092 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2020-11-30 02:46:49,092 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 02:46:49,092 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:49,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:49,093 INFO L82 PathProgramCache]: Analyzing trace with hash 400626091, now seen corresponding path program 1 times [2020-11-30 02:46:49,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:49,093 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595625872] [2020-11-30 02:46:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:49,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:49,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595625872] [2020-11-30 02:46:49,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924190148] [2020-11-30 02:46:49,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:46:49,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:49,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:46:49,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:46:49,398 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:46:49,399 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:46:49,400 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:46:49,429 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 02:46:49,436 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:46:49,436 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 02:46:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:49,496 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:46:49,557 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:46:49,614 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:46:49,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:49,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [958253965] [2020-11-30 02:46:49,675 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2020-11-30 02:46:49,675 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:46:49,680 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:46:49,685 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:46:49,686 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:46:50,129 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:46:50,143 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:46:50,494 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:46:50,741 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-11-30 02:46:51,074 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-11-30 02:46:51,275 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-11-30 02:46:51,484 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-11-30 02:46:51,487 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:46:51,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:46:51,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-11-30 02:46:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466865558] [2020-11-30 02:46:51,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 02:46:51,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 02:46:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-30 02:46:51,490 INFO L87 Difference]: Start difference. First operand 33 states and 39 transitions. Second operand 11 states. [2020-11-30 02:46:51,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:51,774 INFO L93 Difference]: Finished difference Result 83 states and 96 transitions. [2020-11-30 02:46:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:46:51,775 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 6 [2020-11-30 02:46:51,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:51,776 INFO L225 Difference]: With dead ends: 83 [2020-11-30 02:46:51,776 INFO L226 Difference]: Without dead ends: 83 [2020-11-30 02:46:51,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:46:51,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-30 02:46:51,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 30. [2020-11-30 02:46:51,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:46:51,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2020-11-30 02:46:51,788 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 6 [2020-11-30 02:46:51,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:51,788 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2020-11-30 02:46:51,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 02:46:51,789 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2020-11-30 02:46:51,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:46:51,790 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:51,790 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:51,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-11-30 02:46:51,991 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:51,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:51,991 INFO L82 PathProgramCache]: Analyzing trace with hash -390761238, now seen corresponding path program 1 times [2020-11-30 02:46:51,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:51,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304707033] [2020-11-30 02:46:51,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304707033] [2020-11-30 02:46:52,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:52,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385359068] [2020-11-30 02:46:52,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:52,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:52,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:52,047 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand 4 states. [2020-11-30 02:46:52,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,108 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2020-11-30 02:46:52,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:52,109 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 02:46:52,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,110 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:46:52,110 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:46:52,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:52,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:46:52,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 02:46:52,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 02:46:52,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-30 02:46:52,114 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 7 [2020-11-30 02:46:52,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,114 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-30 02:46:52,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:52,122 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-30 02:46:52,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:46:52,123 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-30 02:46:52,124 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash -390761237, now seen corresponding path program 1 times [2020-11-30 02:46:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957133000] [2020-11-30 02:46:52,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,212 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957133000] [2020-11-30 02:46:52,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:52,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013406997] [2020-11-30 02:46:52,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:46:52,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:46:52,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:52,215 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 5 states. [2020-11-30 02:46:52,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,290 INFO L93 Difference]: Finished difference Result 40 states and 45 transitions. [2020-11-30 02:46:52,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:52,291 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 7 [2020-11-30 02:46:52,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,292 INFO L225 Difference]: With dead ends: 40 [2020-11-30 02:46:52,292 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 02:46:52,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:46:52,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 02:46:52,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-11-30 02:46:52,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 02:46:52,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-11-30 02:46:52,295 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 7 [2020-11-30 02:46:52,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,295 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-11-30 02:46:52,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:46:52,296 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-11-30 02:46:52,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:46:52,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,296 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-30 02:46:52,296 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,297 INFO L82 PathProgramCache]: Analyzing trace with hash 771302905, now seen corresponding path program 1 times [2020-11-30 02:46:52,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46429929] [2020-11-30 02:46:52,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46429929] [2020-11-30 02:46:52,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:46:52,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712765836] [2020-11-30 02:46:52,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:52,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:52,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:52,454 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-11-30 02:46:52,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,507 INFO L93 Difference]: Finished difference Result 31 states and 39 transitions. [2020-11-30 02:46:52,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:52,507 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 02:46:52,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,508 INFO L225 Difference]: With dead ends: 31 [2020-11-30 02:46:52,508 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:46:52,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:52,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:46:52,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 02:46:52,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 02:46:52,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2020-11-30 02:46:52,511 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 8 [2020-11-30 02:46:52,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,512 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2020-11-30 02:46:52,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:52,512 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2020-11-30 02:46:52,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:46:52,512 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,512 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-30 02:46:52,513 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,513 INFO L82 PathProgramCache]: Analyzing trace with hash 771305038, now seen corresponding path program 1 times [2020-11-30 02:46:52,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276612085] [2020-11-30 02:46:52,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276612085] [2020-11-30 02:46:52,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:52,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428526363] [2020-11-30 02:46:52,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:52,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:52,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:52,570 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand 4 states. [2020-11-30 02:46:52,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,614 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-11-30 02:46:52,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:52,615 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-30 02:46:52,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,615 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:46:52,616 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:46:52,616 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:52,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:46:52,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:46:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:46:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 02:46:52,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2020-11-30 02:46:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,619 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 02:46:52,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 02:46:52,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 02:46:52,619 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,619 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-30 02:46:52,620 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,620 INFO L82 PathProgramCache]: Analyzing trace with hash 771305039, now seen corresponding path program 1 times [2020-11-30 02:46:52,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016975405] [2020-11-30 02:46:52,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016975405] [2020-11-30 02:46:52,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:52,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725893256] [2020-11-30 02:46:52,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:46:52,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:46:52,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:52,698 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-11-30 02:46:52,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,801 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2020-11-30 02:46:52,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:46:52,801 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-30 02:46:52,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,802 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:46:52,802 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:46:52,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:46:52,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:46:52,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 02:46:52,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:46:52,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:46:52,805 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 8 [2020-11-30 02:46:52,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,805 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:46:52,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:46:52,806 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:46:52,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:46:52,806 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,806 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,806 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-30 02:46:52,806 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1805198929, now seen corresponding path program 1 times [2020-11-30 02:46:52,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299251470] [2020-11-30 02:46:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299251470] [2020-11-30 02:46:52,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:52,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725023505] [2020-11-30 02:46:52,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:52,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:52,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:52,842 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-11-30 02:46:52,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:52,911 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 02:46:52,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:52,911 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:46:52,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:52,912 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:46:52,912 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:46:52,912 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:52,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:46:52,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-30 02:46:52,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:46:52,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-30 02:46:52,915 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 10 [2020-11-30 02:46:52,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:52,915 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-30 02:46:52,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:52,915 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-30 02:46:52,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:46:52,916 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:52,916 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:52,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-30 02:46:52,916 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:52,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:52,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1805198928, now seen corresponding path program 1 times [2020-11-30 02:46:52,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:52,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516226989] [2020-11-30 02:46:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:52,975 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:52,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516226989] [2020-11-30 02:46:52,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:52,975 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:46:52,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377313193] [2020-11-30 02:46:52,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:46:52,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:52,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:46:52,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:46:52,977 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-11-30 02:46:53,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:53,063 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-30 02:46:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:46:53,063 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:46:53,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:53,064 INFO L225 Difference]: With dead ends: 31 [2020-11-30 02:46:53,064 INFO L226 Difference]: Without dead ends: 31 [2020-11-30 02:46:53,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:46:53,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-11-30 02:46:53,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-11-30 02:46:53,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:46:53,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-11-30 02:46:53,070 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 10 [2020-11-30 02:46:53,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:53,071 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-11-30 02:46:53,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:46:53,071 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-11-30 02:46:53,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:46:53,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:53,071 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:53,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-30 02:46:53,071 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:53,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:53,072 INFO L82 PathProgramCache]: Analyzing trace with hash -126600612, now seen corresponding path program 1 times [2020-11-30 02:46:53,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:53,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447861923] [2020-11-30 02:46:53,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:53,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:53,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:53,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447861923] [2020-11-30 02:46:53,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:53,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:46:53,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599608109] [2020-11-30 02:46:53,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:46:53,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:53,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:46:53,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:46:53,102 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 4 states. [2020-11-30 02:46:53,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:53,131 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2020-11-30 02:46:53,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:46:53,132 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-30 02:46:53,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:53,132 INFO L225 Difference]: With dead ends: 26 [2020-11-30 02:46:53,132 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:46:53,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:46:53,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:46:53,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2020-11-30 02:46:53,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:46:53,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2020-11-30 02:46:53,135 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 11 [2020-11-30 02:46:53,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:53,135 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2020-11-30 02:46:53,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:46:53,135 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2020-11-30 02:46:53,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:46:53,136 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:53,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:53,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-30 02:46:53,136 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:53,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:53,137 INFO L82 PathProgramCache]: Analyzing trace with hash -126600611, now seen corresponding path program 1 times [2020-11-30 02:46:53,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:53,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613718253] [2020-11-30 02:46:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:53,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:53,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:53,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613718253] [2020-11-30 02:46:53,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:53,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:46:53,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849450294] [2020-11-30 02:46:53,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:46:53,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:53,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:46:53,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:46:53,234 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 6 states. [2020-11-30 02:46:53,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:53,358 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2020-11-30 02:46:53,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:46:53,358 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-30 02:46:53,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:53,359 INFO L225 Difference]: With dead ends: 31 [2020-11-30 02:46:53,359 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 02:46:53,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-30 02:46:53,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 02:46:53,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-11-30 02:46:53,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:46:53,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2020-11-30 02:46:53,361 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 11 [2020-11-30 02:46:53,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:53,362 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2020-11-30 02:46:53,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:46:53,362 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2020-11-30 02:46:53,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:46:53,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:53,363 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:53,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-30 02:46:53,363 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:53,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:53,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1395691926, now seen corresponding path program 1 times [2020-11-30 02:46:53,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:53,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778128655] [2020-11-30 02:46:53,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:53,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778128655] [2020-11-30 02:46:53,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:46:53,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-30 02:46:53,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067878278] [2020-11-30 02:46:53,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:46:53,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:46:53,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:46:53,517 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand 8 states. [2020-11-30 02:46:53,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:53,770 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-11-30 02:46:53,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:46:53,771 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 13 [2020-11-30 02:46:53,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:53,771 INFO L225 Difference]: With dead ends: 37 [2020-11-30 02:46:53,771 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:46:53,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-11-30 02:46:53,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:46:53,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2020-11-30 02:46:53,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:46:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 02:46:53,774 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 13 [2020-11-30 02:46:53,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:53,774 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 02:46:53,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:46:53,774 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 02:46:53,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:46:53,775 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:53,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:53,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-30 02:46:53,775 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash 576312871, now seen corresponding path program 1 times [2020-11-30 02:46:53,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:53,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683973367] [2020-11-30 02:46:53,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:53,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:53,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683973367] [2020-11-30 02:46:53,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824242946] [2020-11-30 02:46:53,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:46:53,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:53,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 02:46:53,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:46:54,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:54,199 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:46:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:46:54,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1474419556] [2020-11-30 02:46:54,367 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:46:54,367 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:46:54,367 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:46:54,367 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:46:54,367 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:46:54,682 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:46:55,157 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:46:55,318 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-11-30 02:46:55,488 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:46:55,703 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-11-30 02:46:55,885 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:46:56,107 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-11-30 02:46:56,541 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-11-30 02:46:56,919 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 92 [2020-11-30 02:46:57,333 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 101 [2020-11-30 02:46:57,932 WARN L193 SmtUtils]: Spent 444.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 104 [2020-11-30 02:46:58,496 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 102 [2020-11-30 02:46:58,988 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 105 [2020-11-30 02:46:58,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:46:58,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [5, 5, 5] total 27 [2020-11-30 02:46:58,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396776899] [2020-11-30 02:46:58,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:46:58,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:46:58,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:46:58,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:46:58,991 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 13 states. [2020-11-30 02:46:59,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:46:59,258 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-30 02:46:59,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 02:46:59,259 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 15 [2020-11-30 02:46:59,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:46:59,260 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:46:59,260 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:46:59,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2020-11-30 02:46:59,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:46:59,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-11-30 02:46:59,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:46:59,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2020-11-30 02:46:59,262 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 15 [2020-11-30 02:46:59,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:46:59,262 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2020-11-30 02:46:59,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 02:46:59,262 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2020-11-30 02:46:59,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:46:59,263 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:46:59,263 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:46:59,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-30 02:46:59,464 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:46:59,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:46:59,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1833901542, now seen corresponding path program 1 times [2020-11-30 02:46:59,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:46:59,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614117647] [2020-11-30 02:46:59,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:46:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:59,564 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:46:59,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614117647] [2020-11-30 02:46:59,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559988132] [2020-11-30 02:46:59,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:46:59,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:46:59,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 02:46:59,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:46:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:46:59,834 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:46:59,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:46:59,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [450884581] [2020-11-30 02:46:59,964 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:46:59,965 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:46:59,965 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:46:59,965 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:46:59,965 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:00,510 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:47:00,595 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:47:01,392 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:01,890 WARN L193 SmtUtils]: Spent 376.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 91 [2020-11-30 02:47:02,233 WARN L193 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 02:47:02,628 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:02,926 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:03,237 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:04,054 WARN L193 SmtUtils]: Spent 682.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2020-11-30 02:47:05,076 WARN L193 SmtUtils]: Spent 851.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:47:05,377 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:47:05,667 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:47:05,981 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:06,298 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:06,299 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:47:06,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:47:06,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2020-11-30 02:47:06,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921326405] [2020-11-30 02:47:06,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:47:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:47:06,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:47:06,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=815, Unknown=0, NotChecked=0, Total=930 [2020-11-30 02:47:06,301 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand 17 states. [2020-11-30 02:47:06,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:47:06,626 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-30 02:47:06,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 02:47:06,627 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 17 [2020-11-30 02:47:06,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:47:06,628 INFO L225 Difference]: With dead ends: 35 [2020-11-30 02:47:06,628 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:47:06,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=194, Invalid=1138, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 02:47:06,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:47:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-11-30 02:47:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 02:47:06,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-30 02:47:06,630 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 17 [2020-11-30 02:47:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:47:06,631 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-30 02:47:06,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:47:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-30 02:47:06,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-30 02:47:06,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:47:06,631 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:47:06,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:06,839 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:47:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:47:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1016371456, now seen corresponding path program 1 times [2020-11-30 02:47:06,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:47:06,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510579435] [2020-11-30 02:47:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:47:06,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:06,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:06,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510579435] [2020-11-30 02:47:06,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987710690] [2020-11-30 02:47:06,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:07,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:07,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-30 02:47:07,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:47:07,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:07,151 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:47:07,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:07,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1963593488] [2020-11-30 02:47:07,299 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:47:07,299 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:47:07,300 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:47:07,300 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:47:07,300 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:07,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:47:08,408 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:08,989 WARN L193 SmtUtils]: Spent 441.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 100 [2020-11-30 02:47:09,149 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-11-30 02:47:09,334 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:47:09,603 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:09,893 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:10,227 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:11,151 WARN L193 SmtUtils]: Spent 808.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 117 [2020-11-30 02:47:12,169 WARN L193 SmtUtils]: Spent 872.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:47:12,552 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:47:12,890 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:47:13,204 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:13,521 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:13,521 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:47:13,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:47:13,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 15 [2020-11-30 02:47:13,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570280116] [2020-11-30 02:47:13,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:47:13,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:47:13,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:47:13,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=754, Unknown=0, NotChecked=0, Total=870 [2020-11-30 02:47:13,523 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 16 states. [2020-11-30 02:47:13,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:47:13,850 INFO L93 Difference]: Finished difference Result 32 states and 35 transitions. [2020-11-30 02:47:13,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:47:13,851 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-11-30 02:47:13,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:47:13,851 INFO L225 Difference]: With dead ends: 32 [2020-11-30 02:47:13,851 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 02:47:13,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=184, Invalid=1148, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 02:47:13,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 02:47:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2020-11-30 02:47:13,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:47:13,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-30 02:47:13,854 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 18 [2020-11-30 02:47:13,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:47:13,854 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-30 02:47:13,854 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:47:13,855 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-30 02:47:13,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 02:47:13,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:47:13,855 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:47:14,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:14,067 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:47:14,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:47:14,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1775392223, now seen corresponding path program 1 times [2020-11-30 02:47:14,067 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:47:14,067 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901544736] [2020-11-30 02:47:14,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:47:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:14,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901544736] [2020-11-30 02:47:14,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358096947] [2020-11-30 02:47:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:14,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:14,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-30 02:47:14,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:47:14,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:14,529 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:47:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:14,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2061440293] [2020-11-30 02:47:14,704 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:47:14,705 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:47:14,705 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:47:14,705 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:47:14,705 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:14,855 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:47:15,644 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:16,058 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 77 [2020-11-30 02:47:16,428 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:47:16,572 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-30 02:47:16,735 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:16,889 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-11-30 02:47:17,072 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:17,425 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:18,318 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2020-11-30 02:47:19,421 WARN L193 SmtUtils]: Spent 888.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:47:19,737 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:47:20,049 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:47:20,398 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:20,752 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:20,752 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:47:20,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:47:20,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2020-11-30 02:47:20,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144858806] [2020-11-30 02:47:20,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 02:47:20,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:47:20,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 02:47:20,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=984, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 02:47:20,754 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 20 states. [2020-11-30 02:47:21,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:47:21,191 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2020-11-30 02:47:21,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:47:21,192 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 20 [2020-11-30 02:47:21,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:47:21,192 INFO L225 Difference]: With dead ends: 35 [2020-11-30 02:47:21,193 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:47:21,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=246, Invalid=1476, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 02:47:21,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:47:21,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-11-30 02:47:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 02:47:21,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2020-11-30 02:47:21,195 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 20 [2020-11-30 02:47:21,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:47:21,195 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2020-11-30 02:47:21,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 02:47:21,195 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2020-11-30 02:47:21,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 02:47:21,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:47:21,196 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:47:21,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-11-30 02:47:21,402 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:47:21,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:47:21,402 INFO L82 PathProgramCache]: Analyzing trace with hash 797407244, now seen corresponding path program 1 times [2020-11-30 02:47:21,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:47:21,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741694564] [2020-11-30 02:47:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:47:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:21,524 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:21,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741694564] [2020-11-30 02:47:21,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215229487] [2020-11-30 02:47:21,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:21,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:21,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-30 02:47:21,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:47:21,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:21,712 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:47:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:21,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1307349403] [2020-11-30 02:47:21,872 INFO L159 IcfgInterpreter]: Started Sifa with 17 locations of interest [2020-11-30 02:47:21,872 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:47:21,872 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:47:21,873 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:47:21,873 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:22,786 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:23,121 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 88 [2020-11-30 02:47:23,403 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:47:23,554 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-30 02:47:23,717 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:23,867 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-11-30 02:47:24,071 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:24,431 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:25,308 WARN L193 SmtUtils]: Spent 749.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 130 [2020-11-30 02:47:26,396 WARN L193 SmtUtils]: Spent 939.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:47:26,716 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:47:27,032 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:47:27,424 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:27,779 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:28,085 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 69 [2020-11-30 02:47:28,461 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:28,462 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:47:28,462 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:47:28,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 17 [2020-11-30 02:47:28,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149207311] [2020-11-30 02:47:28,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:47:28,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:47:28,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:47:28,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 02:47:28,464 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand 18 states. [2020-11-30 02:47:28,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:47:28,910 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2020-11-30 02:47:28,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:47:28,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-30 02:47:28,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:47:28,913 INFO L225 Difference]: With dead ends: 38 [2020-11-30 02:47:28,913 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:47:28,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=208, Invalid=1432, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:47:28,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:47:28,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2020-11-30 02:47:28,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 02:47:28,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2020-11-30 02:47:28,916 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 21 [2020-11-30 02:47:28,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:47:28,917 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2020-11-30 02:47:28,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:47:28,917 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2020-11-30 02:47:28,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-30 02:47:28,917 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:47:28,917 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:47:29,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:29,131 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:47:29,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:47:29,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1812593753, now seen corresponding path program 2 times [2020-11-30 02:47:29,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:47:29,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693942631] [2020-11-30 02:47:29,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:47:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:29,535 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:29,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693942631] [2020-11-30 02:47:29,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856077258] [2020-11-30 02:47:29,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:29,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:47:29,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:47:29,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-30 02:47:29,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:47:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:30,254 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:47:43,942 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:43,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [784084242] [2020-11-30 02:47:43,944 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:47:43,944 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:47:43,944 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:47:43,944 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:47:43,944 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:45,113 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:46,109 WARN L193 SmtUtils]: Spent 697.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 89 [2020-11-30 02:47:46,312 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-11-30 02:47:46,499 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:47:46,661 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-30 02:47:46,900 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:47,070 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-11-30 02:47:47,298 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:47,708 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:48,861 WARN L193 SmtUtils]: Spent 930.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 117 [2020-11-30 02:47:50,080 WARN L193 SmtUtils]: Spent 977.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:47:50,448 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:47:50,795 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:47:51,192 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:51,568 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:47:51,569 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:47:51,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:47:51,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 11] total 30 [2020-11-30 02:47:51,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715090184] [2020-11-30 02:47:51,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-30 02:47:51,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:47:51,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-30 02:47:51,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1805, Unknown=4, NotChecked=0, Total=1980 [2020-11-30 02:47:51,571 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand 31 states. [2020-11-30 02:47:52,820 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-11-30 02:47:53,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:47:53,260 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-30 02:47:53,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 02:47:53,261 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 23 [2020-11-30 02:47:53,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:47:53,261 INFO L225 Difference]: With dead ends: 50 [2020-11-30 02:47:53,261 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:47:53,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=376, Invalid=2926, Unknown=4, NotChecked=0, Total=3306 [2020-11-30 02:47:53,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:47:53,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2020-11-30 02:47:53,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 02:47:53,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2020-11-30 02:47:53,264 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 23 [2020-11-30 02:47:53,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:47:53,264 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2020-11-30 02:47:53,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-30 02:47:53,264 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2020-11-30 02:47:53,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 02:47:53,264 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:47:53,265 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:47:53,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:53,465 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:47:53,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:47:53,466 INFO L82 PathProgramCache]: Analyzing trace with hash -304636970, now seen corresponding path program 3 times [2020-11-30 02:47:53,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:47:53,466 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088294660] [2020-11-30 02:47:53,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:47:53,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:47:53,624 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:47:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088294660] [2020-11-30 02:47:53,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742041759] [2020-11-30 02:47:53,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:47:53,718 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:47:53,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:47:53,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 61 conjunts are in the unsatisfiable core [2020-11-30 02:47:53,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:47:54,322 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:47:54,323 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:47:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:47:54,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1530529216] [2020-11-30 02:47:54,893 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:47:54,893 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:47:54,894 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:47:54,894 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:47:54,894 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:47:56,010 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:47:56,770 WARN L193 SmtUtils]: Spent 494.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 89 [2020-11-30 02:47:56,931 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-11-30 02:47:57,101 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-11-30 02:47:57,267 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 40 [2020-11-30 02:47:57,448 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 47 [2020-11-30 02:47:57,616 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-11-30 02:47:57,832 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-11-30 02:47:58,261 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-11-30 02:47:59,487 WARN L193 SmtUtils]: Spent 1.02 s on a formula simplification. DAG size of input: 138 DAG size of output: 117 [2020-11-30 02:48:00,773 WARN L193 SmtUtils]: Spent 1.04 s on a formula simplification. DAG size of input: 153 DAG size of output: 141 [2020-11-30 02:48:01,119 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 73 [2020-11-30 02:48:01,475 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 74 [2020-11-30 02:48:01,882 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:48:02,275 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 85 [2020-11-30 02:48:02,276 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:48:02,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:48:02,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 12, 11] total 30 [2020-11-30 02:48:02,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174658175] [2020-11-30 02:48:02,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-30 02:48:02,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:48:02,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-30 02:48:02,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1843, Unknown=0, NotChecked=0, Total=2070 [2020-11-30 02:48:02,277 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand 32 states. [2020-11-30 02:48:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:03,727 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2020-11-30 02:48:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 02:48:03,728 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 25 [2020-11-30 02:48:03,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:03,729 INFO L225 Difference]: With dead ends: 78 [2020-11-30 02:48:03,729 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:48:03,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=588, Invalid=3194, Unknown=0, NotChecked=0, Total=3782 [2020-11-30 02:48:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:48:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 36. [2020-11-30 02:48:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-11-30 02:48:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2020-11-30 02:48:03,732 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2020-11-30 02:48:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:03,732 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2020-11-30 02:48:03,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-30 02:48:03,732 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2020-11-30 02:48:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 02:48:03,733 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:03,733 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:03,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable381 [2020-11-30 02:48:03,941 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:03,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:03,942 INFO L82 PathProgramCache]: Analyzing trace with hash -853809980, now seen corresponding path program 2 times [2020-11-30 02:48:03,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:48:03,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638998538] [2020-11-30 02:48:03,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:48:03,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:48:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638998538] [2020-11-30 02:48:04,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440768157] [2020-11-30 02:48:04,186 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:48:04,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-30 02:48:04,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:48:04,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 65 conjunts are in the unsatisfiable core [2020-11-30 02:48:04,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:04,729 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:48:04,730 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:05,031 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 02:48:05,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [588302803] [2020-11-30 02:48:05,033 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:48:05,033 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:48:05,033 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:48:05,033 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:48:05,033 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:48:05,047 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@38ac0524 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:566) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.doElimAllRec(ElimStorePlain.java:439) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:239) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:313) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:153) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:289) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:189) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:179) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:48:05,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-30 02:48:05,048 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-11-30 02:48:05,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965810525] [2020-11-30 02:48:05,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 02:48:05,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:48:05,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 02:48:05,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=720, Unknown=0, NotChecked=0, Total=812 [2020-11-30 02:48:05,050 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand 13 states. [2020-11-30 02:48:05,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:48:05,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2020-11-30 02:48:05,262 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@38ac0524 at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:197) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:77) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1064) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:966) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:187) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:743) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:674) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:473) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-11-30 02:48:05,264 INFO L168 Benchmark]: Toolchain (without parser) took 79211.07 ms. Allocated memory was 96.5 MB in the beginning and 255.9 MB in the end (delta: 159.4 MB). Free memory was 67.3 MB in the beginning and 163.0 MB in the end (delta: -95.8 MB). Peak memory consumption was 63.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,265 INFO L168 Benchmark]: CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory is still 55.1 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:48:05,265 INFO L168 Benchmark]: CACSL2BoogieTranslator took 457.92 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 63.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,265 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 96.5 MB. Free memory was 63.0 MB in the beginning and 61.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,265 INFO L168 Benchmark]: Boogie Preprocessor took 26.33 ms. Allocated memory is still 96.5 MB. Free memory was 61.2 MB in the beginning and 60.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,266 INFO L168 Benchmark]: RCFGBuilder took 919.86 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.6 MB in the beginning and 78.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,269 INFO L168 Benchmark]: TraceAbstraction took 77749.19 ms. Allocated memory was 117.4 MB in the beginning and 255.9 MB in the end (delta: 138.4 MB). Free memory was 77.5 MB in the beginning and 163.0 MB in the end (delta: -85.5 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:05,270 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20 ms. Allocated memory is still 96.5 MB. Free memory is still 55.1 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 457.92 ms. Allocated memory is still 96.5 MB. Free memory was 67.0 MB in the beginning and 63.4 MB in the end (delta: 3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.76 ms. Allocated memory is still 96.5 MB. Free memory was 63.0 MB in the beginning and 61.2 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 26.33 ms. Allocated memory is still 96.5 MB. Free memory was 61.2 MB in the beginning and 60.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 919.86 ms. Allocated memory was 96.5 MB in the beginning and 117.4 MB in the end (delta: 21.0 MB). Free memory was 59.6 MB in the beginning and 78.1 MB in the end (delta: -18.5 MB). Peak memory consumption was 20.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 77749.19 ms. Allocated memory was 117.4 MB in the beginning and 255.9 MB in the end (delta: 138.4 MB). Free memory was 77.5 MB in the beginning and 163.0 MB in the end (delta: -85.5 MB). Peak memory consumption was 53.3 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@38ac0524 de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@38ac0524: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:48:07,747 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:48:07,750 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:48:07,799 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:48:07,800 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:48:07,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:48:07,809 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:48:07,814 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:48:07,817 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:48:07,825 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:48:07,826 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:48:07,832 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:48:07,833 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:48:07,847 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:48:07,848 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:48:07,850 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:48:07,851 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:48:07,852 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:48:07,855 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:48:07,860 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:48:07,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:48:07,869 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:48:07,870 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:48:07,873 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:48:07,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:48:07,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:48:07,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:48:07,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:48:07,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:48:07,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:48:07,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:48:07,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:48:07,889 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:48:07,890 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:48:07,891 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:48:07,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:48:07,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:48:07,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:48:07,892 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:48:07,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:48:07,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:48:07,896 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-30 02:48:07,945 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:48:07,945 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:48:07,948 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:48:07,948 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:48:07,948 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:48:07,948 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:48:07,949 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:48:07,949 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:48:07,949 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:48:07,951 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:48:07,952 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:48:07,953 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:48:07,953 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:48:07,953 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:48:07,953 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:48:07,954 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:48:07,954 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:48:07,954 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:48:07,954 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:48:07,955 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:48:07,955 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:48:07,955 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:48:07,955 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:48:07,956 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:48:07,956 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:48:07,956 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:48:07,956 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:48:07,957 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:48:07,957 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:48:07,957 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:48:07,957 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:48:07,958 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:48:07,958 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:48:07,958 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:48:07,959 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:48:07,959 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:48:07,959 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:48:07,959 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f3eebd0d696af164582cbeee8be4a910d35e299c [2020-11-30 02:48:08,409 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:48:08,453 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:48:08,457 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:48:08,459 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:48:08,459 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:48:08,460 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-11-30 02:48:08,541 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/ff6826276/251d419bcf0a437398306ef85f91db1d/FLAGac2cadce9 [2020-11-30 02:48:09,177 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:48:09,178 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/sv-benchmarks/c/array-memsafety/openbsd_cstrncmp-alloca-2.i [2020-11-30 02:48:09,193 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/ff6826276/251d419bcf0a437398306ef85f91db1d/FLAGac2cadce9 [2020-11-30 02:48:09,431 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/data/ff6826276/251d419bcf0a437398306ef85f91db1d [2020-11-30 02:48:09,434 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:48:09,435 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:48:09,436 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:48:09,437 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:48:09,441 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:48:09,441 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:09,443 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a14fc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09, skipping insertion in model container [2020-11-30 02:48:09,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:09,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:48:09,485 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:48:09,796 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:48:09,812 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:48:09,923 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:48:09,989 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:48:09,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09 WrapperNode [2020-11-30 02:48:09,991 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:48:09,992 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:48:09,992 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:48:09,992 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:48:09,998 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,054 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:48:10,055 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:48:10,055 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:48:10,055 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:48:10,064 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,064 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,068 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,069 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,078 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,083 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,085 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... [2020-11-30 02:48:10,089 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:48:10,090 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:48:10,090 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:48:10,090 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:48:10,091 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:48:10,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1 [2020-11-30 02:48:10,174 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:48:10,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE1 [2020-11-30 02:48:10,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 02:48:10,175 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:48:10,175 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:48:10,834 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:48:10,834 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-11-30 02:48:10,835 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:48:10 BoogieIcfgContainer [2020-11-30 02:48:10,836 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:48:10,838 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:48:10,838 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:48:10,841 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:48:10,841 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:48:09" (1/3) ... [2020-11-30 02:48:10,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fc7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:48:10, skipping insertion in model container [2020-11-30 02:48:10,842 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:48:09" (2/3) ... [2020-11-30 02:48:10,842 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43fc7f76 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:48:10, skipping insertion in model container [2020-11-30 02:48:10,843 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:48:10" (3/3) ... [2020-11-30 02:48:10,844 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrncmp-alloca-2.i [2020-11-30 02:48:10,855 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:48:10,859 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 19 error locations. [2020-11-30 02:48:10,871 INFO L253 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2020-11-30 02:48:10,889 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:48:10,890 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:48:10,890 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:48:10,890 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:48:10,890 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:48:10,890 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:48:10,890 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:48:10,890 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:48:10,904 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-11-30 02:48:10,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:48:10,910 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:10,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:10,911 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:10,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:10,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1805029096, now seen corresponding path program 1 times [2020-11-30 02:48:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:10,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1905051512] [2020-11-30 02:48:10,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:11,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:11,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:48:11,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:11,119 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:11,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:11,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1905051512] [2020-11-30 02:48:11,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:11,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:48:11,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880771762] [2020-11-30 02:48:11,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:48:11,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:11,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:48:11,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:11,205 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 6 states. [2020-11-30 02:48:11,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:11,359 INFO L93 Difference]: Finished difference Result 100 states and 112 transitions. [2020-11-30 02:48:11,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:11,362 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 02:48:11,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:11,372 INFO L225 Difference]: With dead ends: 100 [2020-11-30 02:48:11,373 INFO L226 Difference]: Without dead ends: 96 [2020-11-30 02:48:11,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:11,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-30 02:48:11,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 55. [2020-11-30 02:48:11,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-30 02:48:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 63 transitions. [2020-11-30 02:48:11,420 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 63 transitions. Word has length 7 [2020-11-30 02:48:11,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:11,421 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 63 transitions. [2020-11-30 02:48:11,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:48:11,421 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 63 transitions. [2020-11-30 02:48:11,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:48:11,422 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:11,422 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:11,634 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:48:11,634 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:11,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:11,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876138, now seen corresponding path program 1 times [2020-11-30 02:48:11,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:11,636 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1940986831] [2020-11-30 02:48:11,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:11,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:11,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:48:11,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:11,787 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:48:11,787 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2020-11-30 02:48:11,790 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:11,803 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:11,810 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:11,811 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:15 [2020-11-30 02:48:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:11,849 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:11,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1940986831] [2020-11-30 02:48:11,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:11,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-11-30 02:48:11,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441228783] [2020-11-30 02:48:11,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:48:11,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:11,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:48:11,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:48:11,883 INFO L87 Difference]: Start difference. First operand 55 states and 63 transitions. Second operand 4 states. [2020-11-30 02:48:12,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:12,049 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-11-30 02:48:12,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:48:12,050 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-11-30 02:48:12,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:12,052 INFO L225 Difference]: With dead ends: 53 [2020-11-30 02:48:12,052 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 02:48:12,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:48:12,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 02:48:12,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-11-30 02:48:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-30 02:48:12,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 61 transitions. [2020-11-30 02:48:12,058 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 61 transitions. Word has length 7 [2020-11-30 02:48:12,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:12,060 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 61 transitions. [2020-11-30 02:48:12,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:48:12,061 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 61 transitions. [2020-11-30 02:48:12,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-11-30 02:48:12,061 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:12,062 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:12,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:48:12,262 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:12,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:12,263 INFO L82 PathProgramCache]: Analyzing trace with hash 1806876139, now seen corresponding path program 1 times [2020-11-30 02:48:12,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:12,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1234926578] [2020-11-30 02:48:12,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:12,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:12,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 28 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:48:12,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:12,373 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_24|], 1=[|v_#valid_33|]} [2020-11-30 02:48:12,381 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:12,383 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:12,384 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,416 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:12,425 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:12,428 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,450 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:12,453 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,454 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:28, output treesize:13 [2020-11-30 02:48:12,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:12,482 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:12,645 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 11 [2020-11-30 02:48:12,675 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:48:12,684 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:12,686 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,700 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:12,703 INFO L173 IndexEqualityManager]: detected equality via solver [2020-11-30 02:48:12,704 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,721 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:12,724 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:12,724 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 5 variables, input treesize:21, output treesize:3 [2020-11-30 02:48:12,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:12,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1234926578] [2020-11-30 02:48:12,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:12,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:48:12,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651779612] [2020-11-30 02:48:12,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:48:12,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:12,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:48:12,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:12,751 INFO L87 Difference]: Start difference. First operand 53 states and 61 transitions. Second operand 6 states. [2020-11-30 02:48:13,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:13,536 INFO L93 Difference]: Finished difference Result 97 states and 110 transitions. [2020-11-30 02:48:13,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:13,538 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 7 [2020-11-30 02:48:13,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:13,539 INFO L225 Difference]: With dead ends: 97 [2020-11-30 02:48:13,540 INFO L226 Difference]: Without dead ends: 97 [2020-11-30 02:48:13,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:48:13,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-11-30 02:48:13,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 55. [2020-11-30 02:48:13,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-30 02:48:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 64 transitions. [2020-11-30 02:48:13,547 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 64 transitions. Word has length 7 [2020-11-30 02:48:13,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:13,547 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 64 transitions. [2020-11-30 02:48:13,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:48:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 64 transitions. [2020-11-30 02:48:13,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:48:13,548 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:13,548 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:13,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:48:13,760 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:13,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:13,761 INFO L82 PathProgramCache]: Analyzing trace with hash -533876960, now seen corresponding path program 1 times [2020-11-30 02:48:13,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:13,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2052321260] [2020-11-30 02:48:13,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:13,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:48:13,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:13,850 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_26|], 1=[|v_#valid_35|]} [2020-11-30 02:48:13,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:13,860 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:13,861 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:13,881 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:13,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:13,899 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:13,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:13,925 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:13,925 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-30 02:48:13,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:13,948 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:14,047 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:48:14,080 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:48:14,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:14,095 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:14,100 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:14,100 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:48:14,100 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:14,101 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:27, output treesize:5 [2020-11-30 02:48:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:14,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2052321260] [2020-11-30 02:48:14,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:14,127 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:48:14,127 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021834767] [2020-11-30 02:48:14,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:48:14,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:14,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:48:14,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:14,129 INFO L87 Difference]: Start difference. First operand 55 states and 64 transitions. Second operand 6 states. [2020-11-30 02:48:14,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:14,583 INFO L93 Difference]: Finished difference Result 93 states and 106 transitions. [2020-11-30 02:48:14,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:48:14,586 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 02:48:14,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:14,587 INFO L225 Difference]: With dead ends: 93 [2020-11-30 02:48:14,587 INFO L226 Difference]: Without dead ends: 93 [2020-11-30 02:48:14,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:48:14,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-30 02:48:14,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 54. [2020-11-30 02:48:14,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-30 02:48:14,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2020-11-30 02:48:14,593 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 9 [2020-11-30 02:48:14,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:14,593 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2020-11-30 02:48:14,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:48:14,593 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2020-11-30 02:48:14,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:48:14,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:14,594 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:14,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 02:48:14,816 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:14,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:14,817 INFO L82 PathProgramCache]: Analyzing trace with hash -533876908, now seen corresponding path program 1 times [2020-11-30 02:48:14,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:14,817 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1428476725] [2020-11-30 02:48:14,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:14,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:14,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:48:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:14,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:14,889 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:14,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:14,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1428476725] [2020-11-30 02:48:14,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:14,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2020-11-30 02:48:14,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666228255] [2020-11-30 02:48:14,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:48:14,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:14,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:48:14,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:14,952 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand 6 states. [2020-11-30 02:48:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:15,066 INFO L93 Difference]: Finished difference Result 98 states and 112 transitions. [2020-11-30 02:48:15,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:15,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-11-30 02:48:15,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:15,071 INFO L225 Difference]: With dead ends: 98 [2020-11-30 02:48:15,071 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 02:48:15,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:15,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 02:48:15,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-11-30 02:48:15,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 02:48:15,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-11-30 02:48:15,078 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 9 [2020-11-30 02:48:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:15,078 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-11-30 02:48:15,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:48:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-11-30 02:48:15,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:48:15,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:15,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:15,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 02:48:15,280 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:15,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:15,281 INFO L82 PathProgramCache]: Analyzing trace with hash -476618606, now seen corresponding path program 1 times [2020-11-30 02:48:15,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:15,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [914463513] [2020-11-30 02:48:15,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:15,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:15,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:48:15,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:15,369 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:48:15,369 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:15,370 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:15,377 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:15,378 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:15,379 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:48:15,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:15,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:15,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:15,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [914463513] [2020-11-30 02:48:15,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:15,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:48:15,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97189012] [2020-11-30 02:48:15,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:48:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:15,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:48:15,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:48:15,399 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 3 states. [2020-11-30 02:48:15,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:15,529 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-11-30 02:48:15,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:48:15,529 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 9 [2020-11-30 02:48:15,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:15,530 INFO L225 Difference]: With dead ends: 63 [2020-11-30 02:48:15,530 INFO L226 Difference]: Without dead ends: 63 [2020-11-30 02:48:15,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:48:15,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-30 02:48:15,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-11-30 02:48:15,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-11-30 02:48:15,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 75 transitions. [2020-11-30 02:48:15,536 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 75 transitions. Word has length 9 [2020-11-30 02:48:15,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:15,536 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 75 transitions. [2020-11-30 02:48:15,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:48:15,537 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 75 transitions. [2020-11-30 02:48:15,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 02:48:15,537 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:15,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:15,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-30 02:48:15,750 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:15,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:15,751 INFO L82 PathProgramCache]: Analyzing trace with hash -476618605, now seen corresponding path program 1 times [2020-11-30 02:48:15,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:15,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1240325341] [2020-11-30 02:48:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:15,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:15,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:48:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:15,886 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:15,886 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:15,887 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:15,951 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:48:15,953 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:15,953 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:17, output treesize:10 [2020-11-30 02:48:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:16,007 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:16,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:16,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1240325341] [2020-11-30 02:48:16,216 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:16,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 7 [2020-11-30 02:48:16,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708274969] [2020-11-30 02:48:16,217 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 02:48:16,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:16,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 02:48:16,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:48:16,218 INFO L87 Difference]: Start difference. First operand 63 states and 75 transitions. Second operand 8 states. [2020-11-30 02:48:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:16,670 INFO L93 Difference]: Finished difference Result 98 states and 114 transitions. [2020-11-30 02:48:16,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:48:16,672 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-11-30 02:48:16,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:16,673 INFO L225 Difference]: With dead ends: 98 [2020-11-30 02:48:16,673 INFO L226 Difference]: Without dead ends: 98 [2020-11-30 02:48:16,673 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-11-30 02:48:16,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-30 02:48:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 65. [2020-11-30 02:48:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-30 02:48:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 78 transitions. [2020-11-30 02:48:16,679 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 78 transitions. Word has length 9 [2020-11-30 02:48:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:16,679 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 78 transitions. [2020-11-30 02:48:16,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 02:48:16,680 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 78 transitions. [2020-11-30 02:48:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:48:16,680 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:16,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:16,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 02:48:16,893 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash 629683418, now seen corresponding path program 1 times [2020-11-30 02:48:16,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:16,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320847143] [2020-11-30 02:48:16,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:16,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:48:16,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:16,990 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:16,990 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:16,991 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:17,025 INFO L625 ElimStorePlain]: treesize reduction 10, result has 67.7 percent of original size [2020-11-30 02:48:17,028 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:17,028 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:16, output treesize:12 [2020-11-30 02:48:17,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:17,040 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:17,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:17,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320847143] [2020-11-30 02:48:17,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:17,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:48:17,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414966185] [2020-11-30 02:48:17,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:48:17,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:17,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:48:17,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:48:17,189 INFO L87 Difference]: Start difference. First operand 65 states and 78 transitions. Second operand 6 states. [2020-11-30 02:48:17,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:17,512 INFO L93 Difference]: Finished difference Result 95 states and 110 transitions. [2020-11-30 02:48:17,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:48:17,513 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:48:17,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:17,514 INFO L225 Difference]: With dead ends: 95 [2020-11-30 02:48:17,514 INFO L226 Difference]: Without dead ends: 95 [2020-11-30 02:48:17,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:48:17,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-30 02:48:17,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 64. [2020-11-30 02:48:17,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-11-30 02:48:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 77 transitions. [2020-11-30 02:48:17,524 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 77 transitions. Word has length 10 [2020-11-30 02:48:17,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:17,524 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 77 transitions. [2020-11-30 02:48:17,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:48:17,524 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 77 transitions. [2020-11-30 02:48:17,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 02:48:17,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:17,525 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:17,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-30 02:48:17,726 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:17,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:17,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1226025170, now seen corresponding path program 1 times [2020-11-30 02:48:17,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:17,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1072194481] [2020-11-30 02:48:17,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:17,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:17,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:48:17,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:17,810 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_34|], 1=[|v_#valid_42|]} [2020-11-30 02:48:17,819 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:17,820 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:17,820 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:17,846 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:17,855 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:17,858 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:17,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:17,889 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:17,890 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:48:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:18,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:18,525 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:48:18,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:18,545 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:18,547 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:18,547 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:48:18,547 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:18,547 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:33, output treesize:1 [2020-11-30 02:48:18,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:18,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1072194481] [2020-11-30 02:48:18,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [169417802] [2020-11-30 02:48:18,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/cvc4 Starting monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:48:18,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:18,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:48:18,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:18,690 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_36|], 1=[|v_#valid_44|]} [2020-11-30 02:48:18,699 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:18,701 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:18,701 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:18,732 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:18,743 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:18,744 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:18,771 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:18,774 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:18,774 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:48:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:18,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:19,438 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:48:19,456 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:19,458 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:19,471 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:19,471 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:48:19,471 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:19,472 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:39, output treesize:1 [2020-11-30 02:48:19,473 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:19,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416969791] [2020-11-30 02:48:19,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:48:19,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:19,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:48:19,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:19,563 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_38|], 1=[|v_#valid_46|]} [2020-11-30 02:48:19,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:19,570 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:19,571 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:19,589 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:19,596 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2020-11-30 02:48:19,602 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:19,625 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:19,629 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:19,629 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:28, output treesize:16 [2020-11-30 02:48:19,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:19,665 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:20,156 INFO L441 ElimStorePlain]: Different costs {1=[|#valid|], 2=[|#length|]} [2020-11-30 02:48:20,162 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:48:20,163 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:20,164 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:20,164 INFO L513 ElimStorePlain]: Eliminatee |#length| vanished before elimination [2020-11-30 02:48:20,165 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:20,165 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 5 variables, input treesize:45, output treesize:1 [2020-11-30 02:48:20,166 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:20,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:48:20,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5, 5, 6, 6] total 17 [2020-11-30 02:48:20,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905640764] [2020-11-30 02:48:20,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-30 02:48:20,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:20,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-30 02:48:20,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-11-30 02:48:20,168 INFO L87 Difference]: Start difference. First operand 64 states and 77 transitions. Second operand 18 states. [2020-11-30 02:48:20,833 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 28 [2020-11-30 02:48:21,145 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 17 [2020-11-30 02:48:21,803 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2020-11-30 02:48:22,394 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2020-11-30 02:48:23,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:23,020 INFO L93 Difference]: Finished difference Result 248 states and 287 transitions. [2020-11-30 02:48:23,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:48:23,022 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 11 [2020-11-30 02:48:23,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:23,023 INFO L225 Difference]: With dead ends: 248 [2020-11-30 02:48:23,023 INFO L226 Difference]: Without dead ends: 248 [2020-11-30 02:48:23,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-11-30 02:48:23,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-11-30 02:48:23,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 88. [2020-11-30 02:48:23,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-11-30 02:48:23,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 107 transitions. [2020-11-30 02:48:23,034 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 107 transitions. Word has length 11 [2020-11-30 02:48:23,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:23,035 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 107 transitions. [2020-11-30 02:48:23,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-30 02:48:23,035 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 107 transitions. [2020-11-30 02:48:23,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:48:23,036 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:23,036 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:23,653 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,10 mathsat -unsat_core_generation=3,11 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:48:23,653 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:23,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446106, now seen corresponding path program 1 times [2020-11-30 02:48:23,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:23,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1125459071] [2020-11-30 02:48:23,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 13 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:23,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:48:23,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:23,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:23,728 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:23,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1125459071] [2020-11-30 02:48:23,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:23,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:48:23,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993905723] [2020-11-30 02:48:23,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:48:23,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:23,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:48:23,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:48:23,731 INFO L87 Difference]: Start difference. First operand 88 states and 107 transitions. Second operand 4 states. [2020-11-30 02:48:23,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:23,835 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-11-30 02:48:23,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:48:23,836 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-11-30 02:48:23,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:23,838 INFO L225 Difference]: With dead ends: 86 [2020-11-30 02:48:23,838 INFO L226 Difference]: Without dead ends: 86 [2020-11-30 02:48:23,838 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:48:23,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-30 02:48:23,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2020-11-30 02:48:23,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-30 02:48:23,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2020-11-30 02:48:23,842 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 13 [2020-11-30 02:48:23,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:23,843 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2020-11-30 02:48:23,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:48:23,843 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2020-11-30 02:48:23,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:48:23,843 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:23,843 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:24,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 mathsat -unsat_core_generation=3 [2020-11-30 02:48:24,044 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:24,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:24,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1518446105, now seen corresponding path program 1 times [2020-11-30 02:48:24,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:24,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [552966220] [2020-11-30 02:48:24,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 14 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:24,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:24,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:48:24,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:24,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:24,193 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:24,272 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:48:24,293 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-11-30 02:48:24,294 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:24,303 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-11-30 02:48:24,304 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:24,338 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:24,339 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-30 02:48:24,339 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:25 [2020-11-30 02:48:24,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:24,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [552966220] [2020-11-30 02:48:24,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:24,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 02:48:24,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548049183] [2020-11-30 02:48:24,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:48:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:48:24,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:48:24,481 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 10 states. [2020-11-30 02:48:25,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:25,278 INFO L93 Difference]: Finished difference Result 158 states and 180 transitions. [2020-11-30 02:48:25,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:48:25,279 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-30 02:48:25,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:25,280 INFO L225 Difference]: With dead ends: 158 [2020-11-30 02:48:25,280 INFO L226 Difference]: Without dead ends: 158 [2020-11-30 02:48:25,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-11-30 02:48:25,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-11-30 02:48:25,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 86. [2020-11-30 02:48:25,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-30 02:48:25,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 105 transitions. [2020-11-30 02:48:25,285 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 105 transitions. Word has length 13 [2020-11-30 02:48:25,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:25,285 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 105 transitions. [2020-11-30 02:48:25,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:48:25,285 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 105 transitions. [2020-11-30 02:48:25,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:48:25,286 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:25,286 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:25,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 mathsat -unsat_core_generation=3 [2020-11-30 02:48:25,486 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:25,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:25,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1862804906, now seen corresponding path program 1 times [2020-11-30 02:48:25,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:25,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1737787217] [2020-11-30 02:48:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:25,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:25,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:48:25,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:25,588 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:25,588 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:25,588 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:25,622 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:48:25,623 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:25,623 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:48:25,768 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:25,768 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:26,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1737787217] [2020-11-30 02:48:26,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [580919595] [2020-11-30 02:48:26,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/cvc4 Starting monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:48:26,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:26,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-30 02:48:26,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:26,347 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:26,348 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:26,348 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:26,393 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:48:26,396 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:26,396 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:48:26,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:26,432 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:26,442 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:26,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555133347] [2020-11-30 02:48:26,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:48:26,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:26,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-30 02:48:26,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:26,579 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:26,580 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:26,580 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:26,646 INFO L625 ElimStorePlain]: treesize reduction 10, result has 68.8 percent of original size [2020-11-30 02:48:26,648 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:26,648 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:13 [2020-11-30 02:48:26,756 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:26,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:27,511 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:27,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-30 02:48:27,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 6] total 16 [2020-11-30 02:48:27,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934773215] [2020-11-30 02:48:27,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-30 02:48:27,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:27,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-30 02:48:27,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:48:27,513 INFO L87 Difference]: Start difference. First operand 86 states and 105 transitions. Second operand 17 states. [2020-11-30 02:48:28,453 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 17 [2020-11-30 02:48:28,666 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2020-11-30 02:48:29,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:29,023 INFO L93 Difference]: Finished difference Result 147 states and 173 transitions. [2020-11-30 02:48:29,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:48:29,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-11-30 02:48:29,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:29,025 INFO L225 Difference]: With dead ends: 147 [2020-11-30 02:48:29,025 INFO L226 Difference]: Without dead ends: 147 [2020-11-30 02:48:29,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=165, Invalid=341, Unknown=0, NotChecked=0, Total=506 [2020-11-30 02:48:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-30 02:48:29,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 83. [2020-11-30 02:48:29,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-30 02:48:29,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 101 transitions. [2020-11-30 02:48:29,030 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 101 transitions. Word has length 13 [2020-11-30 02:48:29,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:29,030 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 101 transitions. [2020-11-30 02:48:29,030 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-30 02:48:29,030 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 101 transitions. [2020-11-30 02:48:29,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:48:29,031 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:29,031 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:29,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3,16 cvc4 --incremental --print-success --lang smt --rewrite-divk,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:48:29,632 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:29,632 INFO L82 PathProgramCache]: Analyzing trace with hash 172810365, now seen corresponding path program 1 times [2020-11-30 02:48:29,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:29,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [830544313] [2020-11-30 02:48:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:29,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:29,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:48:29,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:29,732 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:48:29,732 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:29,736 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:29,736 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:29,736 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-30 02:48:31,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:31,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:32,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [830544313] [2020-11-30 02:48:32,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:32,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 8 [2020-11-30 02:48:32,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98280364] [2020-11-30 02:48:32,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 02:48:32,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:32,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 02:48:32,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=47, Unknown=1, NotChecked=0, Total=72 [2020-11-30 02:48:32,029 INFO L87 Difference]: Start difference. First operand 83 states and 101 transitions. Second operand 9 states. [2020-11-30 02:48:42,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:42,264 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-11-30 02:48:42,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:48:42,264 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-11-30 02:48:42,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:42,265 INFO L225 Difference]: With dead ends: 82 [2020-11-30 02:48:42,265 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:48:42,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=29, Invalid=60, Unknown=1, NotChecked=0, Total=90 [2020-11-30 02:48:42,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:48:42,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-30 02:48:42,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 02:48:42,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-30 02:48:42,268 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 14 [2020-11-30 02:48:42,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:42,269 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-30 02:48:42,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 02:48:42,269 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-30 02:48:42,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:48:42,269 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:42,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:42,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3 [2020-11-30 02:48:42,480 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:42,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:42,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1062174023, now seen corresponding path program 1 times [2020-11-30 02:48:42,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:42,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [74931310] [2020-11-30 02:48:42,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 19 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:42,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:42,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:48:42,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:42,603 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:48:42,603 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:42,603 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:42,610 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:42,611 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:42,611 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:48:42,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:42,645 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:42,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:42,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [74931310] [2020-11-30 02:48:42,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:42,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 02:48:42,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898844246] [2020-11-30 02:48:42,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:48:42,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:42,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:48:42,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:48:42,660 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 5 states. [2020-11-30 02:48:42,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:42,799 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-11-30 02:48:42,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:42,799 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-11-30 02:48:42,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:42,800 INFO L225 Difference]: With dead ends: 77 [2020-11-30 02:48:42,800 INFO L226 Difference]: Without dead ends: 77 [2020-11-30 02:48:42,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:48:42,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-11-30 02:48:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2020-11-30 02:48:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 02:48:42,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-11-30 02:48:42,804 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 15 [2020-11-30 02:48:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:42,804 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-11-30 02:48:42,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:48:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-11-30 02:48:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:48:42,805 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:42,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:43,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 mathsat -unsat_core_generation=3 [2020-11-30 02:48:43,015 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:43,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1062174024, now seen corresponding path program 1 times [2020-11-30 02:48:43,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:43,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [375528264] [2020-11-30 02:48:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 20 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:43,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:43,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 02:48:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:43,101 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:43,102 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:43,102 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:43,125 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 02:48:43,127 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:43,127 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 02:48:43,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:43,191 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:43,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:43,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [375528264] [2020-11-30 02:48:43,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:43,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-30 02:48:43,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782303865] [2020-11-30 02:48:43,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:48:43,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:43,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:48:43,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-30 02:48:43,485 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 10 states. [2020-11-30 02:48:44,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:44,327 INFO L93 Difference]: Finished difference Result 105 states and 120 transitions. [2020-11-30 02:48:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:48:44,329 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 15 [2020-11-30 02:48:44,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:44,329 INFO L225 Difference]: With dead ends: 105 [2020-11-30 02:48:44,330 INFO L226 Difference]: Without dead ends: 105 [2020-11-30 02:48:44,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:48:44,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-11-30 02:48:44,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 79. [2020-11-30 02:48:44,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-30 02:48:44,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-11-30 02:48:44,333 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 15 [2020-11-30 02:48:44,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:44,333 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-11-30 02:48:44,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:48:44,333 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-11-30 02:48:44,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:48:44,334 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:44,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:44,539 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 mathsat -unsat_core_generation=3 [2020-11-30 02:48:44,539 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:44,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:44,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1452978584, now seen corresponding path program 1 times [2020-11-30 02:48:44,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:44,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1731836760] [2020-11-30 02:48:44,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:44,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:48:44,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:44,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:44,633 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:44,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1731836760] [2020-11-30 02:48:44,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:44,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 02:48:44,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404861870] [2020-11-30 02:48:44,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:48:44,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:48:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:48:44,641 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 5 states. [2020-11-30 02:48:44,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:44,811 INFO L93 Difference]: Finished difference Result 78 states and 93 transitions. [2020-11-30 02:48:44,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:44,812 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-11-30 02:48:44,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:44,813 INFO L225 Difference]: With dead ends: 78 [2020-11-30 02:48:44,813 INFO L226 Difference]: Without dead ends: 78 [2020-11-30 02:48:44,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:48:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-30 02:48:44,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-11-30 02:48:44,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-30 02:48:44,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 93 transitions. [2020-11-30 02:48:44,816 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 93 transitions. Word has length 17 [2020-11-30 02:48:44,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:44,816 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 93 transitions. [2020-11-30 02:48:44,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:48:44,816 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 93 transitions. [2020-11-30 02:48:44,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 02:48:44,817 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:44,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:45,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3 [2020-11-30 02:48:45,027 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:45,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:45,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1452978583, now seen corresponding path program 1 times [2020-11-30 02:48:45,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:45,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [795055842] [2020-11-30 02:48:45,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 22 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:45,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:45,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 02:48:45,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:45,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:45,436 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-30 02:48:45,459 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2020-11-30 02:48:45,459 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:45,474 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2020-11-30 02:48:45,475 INFO L545 ElimStorePlain]: Start of recursive call 3: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:45,501 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:45,502 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 2 dim-0 vars, and 2 xjuncts. [2020-11-30 02:48:45,502 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:31, output treesize:25 [2020-11-30 02:48:45,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:45,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [795055842] [2020-11-30 02:48:45,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:45,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-11-30 02:48:45,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085609921] [2020-11-30 02:48:45,697 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:48:45,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:45,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:48:45,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:48:45,698 INFO L87 Difference]: Start difference. First operand 78 states and 93 transitions. Second operand 12 states. [2020-11-30 02:48:47,012 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2020-11-30 02:48:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:47,023 INFO L93 Difference]: Finished difference Result 122 states and 138 transitions. [2020-11-30 02:48:47,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 02:48:47,024 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 17 [2020-11-30 02:48:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:47,025 INFO L225 Difference]: With dead ends: 122 [2020-11-30 02:48:47,025 INFO L226 Difference]: Without dead ends: 122 [2020-11-30 02:48:47,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=134, Invalid=328, Unknown=0, NotChecked=0, Total=462 [2020-11-30 02:48:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-30 02:48:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 77. [2020-11-30 02:48:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 02:48:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-11-30 02:48:47,028 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 17 [2020-11-30 02:48:47,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:47,028 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-11-30 02:48:47,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:48:47,028 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-11-30 02:48:47,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:48:47,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:47,029 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:47,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 mathsat -unsat_core_generation=3 [2020-11-30 02:48:47,230 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:47,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:47,230 INFO L82 PathProgramCache]: Analyzing trace with hash -448353975, now seen corresponding path program 1 times [2020-11-30 02:48:47,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:47,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1169324312] [2020-11-30 02:48:47,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 23 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:47,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 02:48:47,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:47,318 INFO L350 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2020-11-30 02:48:47,318 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 11 [2020-11-30 02:48:47,318 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:47,351 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:47,352 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:47,352 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:11 [2020-11-30 02:48:47,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:47,381 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:47,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:47,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1169324312] [2020-11-30 02:48:47,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:47,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 02:48:47,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982046157] [2020-11-30 02:48:47,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:48:47,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:47,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:48:47,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:48:47,398 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand 5 states. [2020-11-30 02:48:47,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:47,551 INFO L93 Difference]: Finished difference Result 76 states and 91 transitions. [2020-11-30 02:48:47,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:48:47,552 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-11-30 02:48:47,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:47,553 INFO L225 Difference]: With dead ends: 76 [2020-11-30 02:48:47,554 INFO L226 Difference]: Without dead ends: 76 [2020-11-30 02:48:47,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:48:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-30 02:48:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2020-11-30 02:48:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-11-30 02:48:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 91 transitions. [2020-11-30 02:48:47,557 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 91 transitions. Word has length 19 [2020-11-30 02:48:47,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:47,557 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 91 transitions. [2020-11-30 02:48:47,557 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:48:47,557 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 91 transitions. [2020-11-30 02:48:47,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:48:47,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:47,558 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:47,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 mathsat -unsat_core_generation=3 [2020-11-30 02:48:47,759 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:47,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:47,759 INFO L82 PathProgramCache]: Analyzing trace with hash -448353974, now seen corresponding path program 1 times [2020-11-30 02:48:47,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:47,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1529472404] [2020-11-30 02:48:47,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:47,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:47,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-30 02:48:47,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:47,858 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:47,859 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 1 case distinctions, treesize of input 9 treesize of output 25 [2020-11-30 02:48:47,859 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:47,884 INFO L625 ElimStorePlain]: treesize reduction 10, result has 64.3 percent of original size [2020-11-30 02:48:47,885 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:47,885 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:13, output treesize:9 [2020-11-30 02:48:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:47,955 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:48,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:48,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1529472404] [2020-11-30 02:48:48,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:48,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6, 6] imperfect sequences [] total 11 [2020-11-30 02:48:48,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085985733] [2020-11-30 02:48:48,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-30 02:48:48,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:48:48,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-30 02:48:48,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-11-30 02:48:48,300 INFO L87 Difference]: Start difference. First operand 76 states and 91 transitions. Second operand 12 states. [2020-11-30 02:48:49,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:48:49,325 INFO L93 Difference]: Finished difference Result 120 states and 134 transitions. [2020-11-30 02:48:49,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-30 02:48:49,326 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 19 [2020-11-30 02:48:49,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:48:49,327 INFO L225 Difference]: With dead ends: 120 [2020-11-30 02:48:49,327 INFO L226 Difference]: Without dead ends: 114 [2020-11-30 02:48:49,328 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-30 02:48:49,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-30 02:48:49,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 77. [2020-11-30 02:48:49,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-30 02:48:49,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2020-11-30 02:48:49,329 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 19 [2020-11-30 02:48:49,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:48:49,330 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2020-11-30 02:48:49,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-30 02:48:49,330 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2020-11-30 02:48:49,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-30 02:48:49,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:48:49,330 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:48:49,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 mathsat -unsat_core_generation=3 [2020-11-30 02:48:49,531 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:48:49,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:48:49,531 INFO L82 PathProgramCache]: Analyzing trace with hash -1075479959, now seen corresponding path program 1 times [2020-11-30 02:48:49,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:48:49,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1059959259] [2020-11-30 02:48:49,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/mathsat Starting monitored process 25 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with mathsat -unsat_core_generation=3 [2020-11-30 02:48:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:49,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-30 02:48:49,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:49,656 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2020-11-30 02:48:49,656 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:48:49,663 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:49,663 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:48:49,663 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:12 [2020-11-30 02:48:49,802 INFO L350 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:49,802 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 28 [2020-11-30 02:48:49,803 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 02:48:49,804 INFO L603 QuantifierPusher]: Distributing 3 conjuncts over 3 disjuncts [2020-11-30 02:48:49,805 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:49,820 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:48:49,824 INFO L545 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:48:49,824 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:32, output treesize:13 [2020-11-30 02:48:49,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:48:49,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:48:50,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1059959259] [2020-11-30 02:48:50,134 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: incompatible size [2020-11-30 02:48:50,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1445865558] [2020-11-30 02:48:50,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/cvc4 Starting monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-30 02:48:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:50,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-30 02:48:50,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:50,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4bad5206 [2020-11-30 02:48:50,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867333649] [2020-11-30 02:48:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_4ebcaabb-95c3-468d-a4d8-cb1f341ab18a/bin/utaipan/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:48:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:48:50,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-30 02:48:50,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:48:50,332 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@4bad5206 [2020-11-30 02:48:50,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:48:50,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2020-11-30 02:48:50,333 ERROR L205 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2020-11-30 02:48:50,333 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:48:50,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 cvc4 --incremental --print-success --lang smt --rewrite-divk,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,25 mathsat -unsat_core_generation=3 [2020-11-30 02:48:50,956 WARN L238 ceAbstractionStarter]: Unable to decide correctness. Please check the following counterexample manually. [2020-11-30 02:48:50,957 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:48:50 BoogieIcfgContainer [2020-11-30 02:48:50,957 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:48:50,958 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:48:50,958 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:48:50,958 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:48:50,967 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:48:10" (3/4) ... [2020-11-30 02:48:50,970 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:48:50,971 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:48:50,972 INFO L168 Benchmark]: Toolchain (without parser) took 41536.46 ms. Allocated memory was 58.7 MB in the beginning and 98.6 MB in the end (delta: 39.8 MB). Free memory was 35.8 MB in the beginning and 32.5 MB in the end (delta: 3.3 MB). Peak memory consumption was 42.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:50,972 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:48:50,973 INFO L168 Benchmark]: CACSL2BoogieTranslator took 554.57 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 31.2 MB in the end (delta: 4.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:50,973 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.81 ms. Allocated memory is still 58.7 MB. Free memory was 31.0 MB in the beginning and 29.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:50,973 INFO L168 Benchmark]: Boogie Preprocessor took 34.04 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:48:50,974 INFO L168 Benchmark]: RCFGBuilder took 745.96 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 27.5 MB in the beginning and 44.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:50,975 INFO L168 Benchmark]: TraceAbstraction took 40119.71 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 44.6 MB in the beginning and 32.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:48:50,975 INFO L168 Benchmark]: Witness Printer took 13.03 ms. Allocated memory is still 98.6 MB. Free memory is still 32.5 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:48:50,978 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 58.7 MB. Free memory was 40.4 MB in the beginning and 40.4 MB in the end (delta: 1.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 554.57 ms. Allocated memory is still 58.7 MB. Free memory was 35.7 MB in the beginning and 31.2 MB in the end (delta: 4.5 MB). Peak memory consumption was 16.8 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.81 ms. Allocated memory is still 58.7 MB. Free memory was 31.0 MB in the beginning and 29.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.04 ms. Allocated memory is still 58.7 MB. Free memory was 29.1 MB in the beginning and 27.7 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 745.96 ms. Allocated memory was 58.7 MB in the beginning and 81.8 MB in the end (delta: 23.1 MB). Free memory was 27.5 MB in the beginning and 44.9 MB in the end (delta: -17.4 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 40119.71 ms. Allocated memory was 81.8 MB in the beginning and 98.6 MB in the end (delta: 16.8 MB). Free memory was 44.6 MB in the beginning and 32.5 MB in the end (delta: 12.1 MB). Peak memory consumption was 27.4 MB. Max. memory is 16.1 GB. * Witness Printer took 13.03 ms. Allocated memory is still 98.6 MB. Free memory is still 32.5 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 519]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L527] int length1 = __VERIFIER_nondet_int(); [L528] int length2 = __VERIFIER_nondet_int(); [L529] COND TRUE length1 < 1 [L530] length1 = 1 [L532] COND TRUE length2 < 1 [L533] length2 = 1 [L535] char* nondetString1 = (char*) __builtin_alloca (length1 * sizeof(char)); [L536] char* nondetString2 = (char*) __builtin_alloca (length2 * sizeof(char)); [L538] int i = 0; [L538] COND FALSE !(i< length1 -1) [L543] int i = 0; [L543] COND FALSE !(i< length2 -1) [L548] nondetString1[length1-1] = '\0' [L549] nondetString2[length2-1] = '\0' [L516] COND FALSE !(n == 0) [L519] EXPR \read(*s1) [L519] EXPR s2++ [L519] COND FALSE !(*s1 != *s2++) [L521] EXPR s1++ [L521] COND FALSE !(*s1++ == 0) [L523] EXPR --n [L523] COND TRUE --n != 0 [L519] \read(*s1) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 19 error locations. Started 1 CEGAR loops. VerificationResult: UNKNOWN, OverallTime: 40.0s, OverallIterations: 20, TraceHistogramMax: 2, AutomataDifference: 21.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 659 SDtfs, 4376 SDslu, 1363 SDs, 0 SdLazy, 1331 SolverSat, 153 SolverUnsat, 5 SolverUnknown, 0 SolverNotchecked, 15.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 574 GetRequests, 391 SyntacticMatches, 11 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 13.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=88occurred in iteration=9, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 19 MinimizatonAttempts, 623 StatesRemovedByMinimization, 12 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 10.1s InterpolantComputationTime, 281 NumberOfCodeBlocks, 281 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 516 ConstructedInterpolants, 18 QuantifiedInterpolants, 57172 SizeOfPredicates, 140 NumberOfNonLiveVariables, 1040 ConjunctsInSsa, 181 ConjunctsInUnsatCore, 46 InterpolantComputations, 34 PerfectInterpolantSequences, 0/24 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...