./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-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_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 01:59:29,877 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 01:59:29,879 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 01:59:29,920 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 01:59:29,921 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 01:59:29,959 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 01:59:29,962 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 01:59:29,969 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 01:59:29,972 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 01:59:29,988 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 01:59:29,989 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 01:59:29,990 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 01:59:29,991 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 01:59:29,994 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 01:59:29,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 01:59:29,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 01:59:29,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 01:59:30,003 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 01:59:30,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 01:59:30,014 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 01:59:30,016 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 01:59:30,017 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 01:59:30,019 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 01:59:30,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 01:59:30,029 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 01:59:30,029 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 01:59:30,030 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 01:59:30,032 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 01:59:30,032 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 01:59:30,033 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 01:59:30,034 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 01:59:30,035 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 01:59:30,037 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 01:59:30,038 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 01:59:30,039 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 01:59:30,039 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 01:59:30,040 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 01:59:30,040 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 01:59:30,040 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 01:59:30,041 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 01:59:30,043 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 01:59:30,045 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 01:59:30,087 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 01:59:30,087 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 01:59:30,088 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 01:59:30,089 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 01:59:30,089 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 01:59:30,089 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 01:59:30,089 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 01:59:30,089 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 01:59:30,090 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 01:59:30,090 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 01:59:30,091 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 01:59:30,091 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 01:59:30,091 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 01:59:30,091 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 01:59:30,092 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 01:59:30,092 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 01:59:30,092 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 01:59:30,093 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 01:59:30,093 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 01:59:30,093 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 01:59:30,093 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 01:59:30,093 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 01:59:30,094 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 01:59:30,095 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 01:59:30,095 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 01:59:30,095 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 01:59:30,095 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 01:59:30,096 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 01:59:30,096 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 01:59:30,096 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 01:59:30,096 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 01:59:30,096 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 01:59:30,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 01:59:30,097 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 01:59:30,097 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 01:59:30,097 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_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b05f810cf5c3fdbb476cd22f2154f4cd5a41b63d [2020-11-30 01:59:30,405 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 01:59:30,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 01:59:30,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 01:59:30,444 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 01:59:30,446 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 01:59:30,447 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/../../sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-11-30 01:59:30,510 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/data/3ca984fbe/c1d0d80769ae409b83934156cd371e40/FLAG85d843de0 [2020-11-30 01:59:31,061 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 01:59:31,066 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/sv-benchmarks/c/array-memsafety/openbsd_cstrpbrk-alloca-2.i [2020-11-30 01:59:31,091 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/data/3ca984fbe/c1d0d80769ae409b83934156cd371e40/FLAG85d843de0 [2020-11-30 01:59:31,335 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/data/3ca984fbe/c1d0d80769ae409b83934156cd371e40 [2020-11-30 01:59:31,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 01:59:31,340 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 01:59:31,343 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 01:59:31,344 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 01:59:31,347 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 01:59:31,349 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,351 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@49cf82d5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31, skipping insertion in model container [2020-11-30 01:59:31,351 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,364 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 01:59:31,420 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 01:59:31,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:59:31,749 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 01:59:31,787 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 01:59:31,834 INFO L208 MainTranslator]: Completed translation [2020-11-30 01:59:31,834 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31 WrapperNode [2020-11-30 01:59:31,835 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 01:59:31,836 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 01:59:31,836 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 01:59:31,836 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 01:59:31,844 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,888 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 01:59:31,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 01:59:31,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 01:59:31,890 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 01:59:31,898 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,898 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,914 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,925 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,934 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,938 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... [2020-11-30 01:59:31,940 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 01:59:31,941 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 01:59:31,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 01:59:31,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 01:59:31,953 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 01:59:32,028 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 01:59:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 01:59:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-30 01:59:32,029 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 01:59:32,029 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 01:59:32,680 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 01:59:32,680 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 01:59:32,682 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:32 BoogieIcfgContainer [2020-11-30 01:59:32,682 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 01:59:32,684 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 01:59:32,684 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 01:59:32,688 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 01:59:32,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 01:59:31" (1/3) ... [2020-11-30 01:59:32,689 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78291a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:59:32, skipping insertion in model container [2020-11-30 01:59:32,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 01:59:31" (2/3) ... [2020-11-30 01:59:32,690 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78291a63 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 01:59:32, skipping insertion in model container [2020-11-30 01:59:32,690 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:32" (3/3) ... [2020-11-30 01:59:32,692 INFO L111 eAbstractionObserver]: Analyzing ICFG openbsd_cstrpbrk-alloca-2.i [2020-11-30 01:59:32,702 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 01:59:32,706 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 13 error locations. [2020-11-30 01:59:32,717 INFO L253 AbstractCegarLoop]: Starting to check reachability of 13 error locations. [2020-11-30 01:59:32,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 01:59:32,748 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 01:59:32,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 01:59:32,749 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 01:59:32,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 01:59:32,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 01:59:32,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 01:59:32,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 01:59:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2020-11-30 01:59:32,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:59:32,773 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:32,773 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:59:32,774 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:32,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:32,779 INFO L82 PathProgramCache]: Analyzing trace with hash 144888, now seen corresponding path program 1 times [2020-11-30 01:59:32,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:32,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166858942] [2020-11-30 01:59:32,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:32,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:33,002 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 01:59:33,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166858942] [2020-11-30 01:59:33,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:33,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:59:33,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634650471] [2020-11-30 01:59:33,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:59:33,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:59:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:33,023 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 3 states. [2020-11-30 01:59:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:33,077 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-11-30 01:59:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:33,078 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 3 [2020-11-30 01:59:33,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:33,084 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:59:33,085 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:59:33,086 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 01:59:33,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:59:33,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:59:33,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:59:33,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:59:33,115 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 3 [2020-11-30 01:59:33,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:33,115 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:59:33,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:59:33,115 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:59:33,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2020-11-30 01:59:33,116 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:33,116 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1] [2020-11-30 01:59:33,116 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 01:59:33,116 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:33,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:33,117 INFO L82 PathProgramCache]: Analyzing trace with hash 144889, now seen corresponding path program 1 times [2020-11-30 01:59:33,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:33,117 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11168562] [2020-11-30 01:59:33,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:33,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:33,198 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 01:59:33,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11168562] [2020-11-30 01:59:33,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:33,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:59:33,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163952317] [2020-11-30 01:59:33,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:59:33,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:59:33,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:59:33,202 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-11-30 01:59:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:33,317 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2020-11-30 01:59:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:33,318 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 3 [2020-11-30 01:59:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:33,319 INFO L225 Difference]: With dead ends: 30 [2020-11-30 01:59:33,319 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 01:59:33,320 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 01:59:33,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 01:59:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-11-30 01:59:33,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-11-30 01:59:33,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-11-30 01:59:33,329 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 3 [2020-11-30 01:59:33,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:33,329 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-11-30 01:59:33,329 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:59:33,330 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-11-30 01:59:33,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 01:59:33,330 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:33,330 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1] [2020-11-30 01:59:33,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 01:59:33,331 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:33,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:33,333 INFO L82 PathProgramCache]: Analyzing trace with hash 139321714, now seen corresponding path program 1 times [2020-11-30 01:59:33,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:33,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023842212] [2020-11-30 01:59:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:33,434 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 01:59:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023842212] [2020-11-30 01:59:33,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789809625] [2020-11-30 01:59:33,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:33,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-30 01:59:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:33,580 INFO L441 ElimStorePlain]: Different costs {0=[|v_#length_40|], 1=[|ULTIMATE.start_main_old_#valid|]} [2020-11-30 01:59:33,591 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 01:59:33,599 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 01:59:33,600 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 01:59:33,618 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:59:33,625 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 01:59:33,634 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 01:59:33,646 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 01:59:33,649 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 01:59:33,650 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:24, output treesize:12 [2020-11-30 01:59:33,676 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 01:59:33,676 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:33,744 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 01:59:33,797 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 01:59:33,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1488642765] [2020-11-30 01:59:33,815 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2020-11-30 01:59:33,815 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:33,819 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:33,824 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:33,825 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:34,598 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 124 [2020-11-30 01:59:34,794 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:34,976 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 46 [2020-11-30 01:59:35,404 WARN L193 SmtUtils]: Spent 374.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 01:59:35,612 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 01:59:35,615 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:35,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:35,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2020-11-30 01:59:35,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307259593] [2020-11-30 01:59:35,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-30 01:59:35,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:35,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-30 01:59:35,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-30 01:59:35,618 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 9 states. [2020-11-30 01:59:35,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:35,766 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2020-11-30 01:59:35,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:35,770 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 5 [2020-11-30 01:59:35,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:35,771 INFO L225 Difference]: With dead ends: 29 [2020-11-30 01:59:35,771 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 01:59:35,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-11-30 01:59:35,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 01:59:35,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2020-11-30 01:59:35,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:59:35,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:59:35,776 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 5 [2020-11-30 01:59:35,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:35,776 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:59:35,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-30 01:59:35,777 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:59:35,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:59:35,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:35,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:59:35,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2020-11-30 01:59:35,983 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:35,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:35,983 INFO L82 PathProgramCache]: Analyzing trace with hash 24098178, now seen corresponding path program 1 times [2020-11-30 01:59:35,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:35,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714950401] [2020-11-30 01:59:35,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:35,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:36,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714950401] [2020-11-30 01:59:36,086 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378599347] [2020-11-30 01:59:36,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:36,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:36,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:36,240 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:36,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:36,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 01:59:36,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1738287216] [2020-11-30 01:59:36,383 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 01:59:36,384 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:36,384 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:36,384 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:36,384 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:36,933 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:37,343 WARN L193 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 01:59:37,518 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 01:59:37,823 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-11-30 01:59:37,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:37,825 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4, 4] total 16 [2020-11-30 01:59:37,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71388318] [2020-11-30 01:59:37,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:59:37,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:37,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:59:37,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-30 01:59:37,827 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 5 states. [2020-11-30 01:59:38,193 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 80 [2020-11-30 01:59:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:38,289 INFO L93 Difference]: Finished difference Result 32 states and 36 transitions. [2020-11-30 01:59:38,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:38,290 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 01:59:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:38,290 INFO L225 Difference]: With dead ends: 32 [2020-11-30 01:59:38,291 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 01:59:38,291 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:59:38,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 01:59:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 29. [2020-11-30 01:59:38,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-11-30 01:59:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-11-30 01:59:38,294 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 6 [2020-11-30 01:59:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:38,294 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-11-30 01:59:38,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:59:38,295 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-11-30 01:59:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:59:38,295 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:38,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:59:38,495 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-30 01:59:38,496 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:38,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:38,496 INFO L82 PathProgramCache]: Analyzing trace with hash 24095719, now seen corresponding path program 1 times [2020-11-30 01:59:38,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:38,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540655282] [2020-11-30 01:59:38,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:38,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:38,536 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:38,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540655282] [2020-11-30 01:59:38,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:38,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 01:59:38,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289723974] [2020-11-30 01:59:38,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 01:59:38,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:38,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 01:59:38,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 01:59:38,539 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 3 states. [2020-11-30 01:59:38,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:38,569 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2020-11-30 01:59:38,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 01:59:38,576 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-11-30 01:59:38,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:38,577 INFO L225 Difference]: With dead ends: 27 [2020-11-30 01:59:38,577 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:59:38,577 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 01:59:38,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:59:38,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-11-30 01:59:38,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:59:38,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 01:59:38,581 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2020-11-30 01:59:38,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:38,581 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 01:59:38,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 01:59:38,581 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 01:59:38,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-30 01:59:38,582 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:38,582 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-30 01:59:38,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-30 01:59:38,582 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:38,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:38,583 INFO L82 PathProgramCache]: Analyzing trace with hash 24095720, now seen corresponding path program 1 times [2020-11-30 01:59:38,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:38,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464302895] [2020-11-30 01:59:38,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:38,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:38,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464302895] [2020-11-30 01:59:38,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:38,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 01:59:38,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629412312] [2020-11-30 01:59:38,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:59:38,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:38,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:59:38,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:59:38,658 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 5 states. [2020-11-30 01:59:38,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:38,736 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 01:59:38,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:38,737 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 6 [2020-11-30 01:59:38,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:38,737 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:59:38,737 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:59:38,738 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 01:59:38,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:59:38,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-11-30 01:59:38,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-11-30 01:59:38,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-11-30 01:59:38,741 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2020-11-30 01:59:38,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:38,741 INFO L481 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-11-30 01:59:38,741 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:59:38,742 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-11-30 01:59:38,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:59:38,742 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:38,742 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:38,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-30 01:59:38,743 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:38,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:38,743 INFO L82 PathProgramCache]: Analyzing trace with hash 1681216678, now seen corresponding path program 1 times [2020-11-30 01:59:38,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:38,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553247587] [2020-11-30 01:59:38,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:38,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:38,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:38,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553247587] [2020-11-30 01:59:38,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302593393] [2020-11-30 01:59:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:38,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:38,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:38,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:38,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:39,095 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:39,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [488717174] [2020-11-30 01:59:39,098 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2020-11-30 01:59:39,098 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:39,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:39,099 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:39,099 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:39,927 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:40,236 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-11-30 01:59:40,412 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 01:59:40,578 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 01:59:40,875 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 01:59:41,262 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-11-30 01:59:41,263 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:41,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:41,263 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2020-11-30 01:59:41,263 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978257449] [2020-11-30 01:59:41,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 01:59:41,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:41,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 01:59:41,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:59:41,265 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 14 states. [2020-11-30 01:59:41,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:41,425 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2020-11-30 01:59:41,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:41,426 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 8 [2020-11-30 01:59:41,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:41,426 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:59:41,426 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:59:41,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-11-30 01:59:41,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:59:41,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-11-30 01:59:41,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:59:41,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2020-11-30 01:59:41,431 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 8 [2020-11-30 01:59:41,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:41,432 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2020-11-30 01:59:41,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 01:59:41,432 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2020-11-30 01:59:41,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-30 01:59:41,432 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:41,433 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:41,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:41,642 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:41,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:41,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1681214220, now seen corresponding path program 1 times [2020-11-30 01:59:41,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:41,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168935094] [2020-11-30 01:59:41,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:41,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:41,725 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 01:59:41,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168935094] [2020-11-30 01:59:41,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359359775] [2020-11-30 01:59:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:41,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:41,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-30 01:59:41,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:41,874 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 01:59:41,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:41,970 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 01:59:41,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [248258882] [2020-11-30 01:59:41,972 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2020-11-30 01:59:41,972 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:41,972 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:41,973 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:41,973 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:42,590 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:42,775 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 48 [2020-11-30 01:59:42,898 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 01:59:43,232 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 01:59:43,353 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 01:59:43,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:43,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2020-11-30 01:59:43,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017947385] [2020-11-30 01:59:43,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-30 01:59:43,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-30 01:59:43,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-11-30 01:59:43,355 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 11 states. [2020-11-30 01:59:43,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:43,439 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2020-11-30 01:59:43,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-30 01:59:43,439 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 8 [2020-11-30 01:59:43,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:43,440 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:59:43,440 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 01:59:43,440 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:59:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 01:59:43,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-30 01:59:43,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:59:43,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 01:59:43,443 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 8 [2020-11-30 01:59:43,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:43,444 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 01:59:43,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-30 01:59:43,444 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 01:59:43,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-11-30 01:59:43,444 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:43,444 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:43,645 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-11-30 01:59:43,645 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:43,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:43,645 INFO L82 PathProgramCache]: Analyzing trace with hash 578109460, now seen corresponding path program 1 times [2020-11-30 01:59:43,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:43,646 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177695555] [2020-11-30 01:59:43,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:43,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:43,706 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:43,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177695555] [2020-11-30 01:59:43,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700161893] [2020-11-30 01:59:43,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:43,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:43,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-30 01:59:43,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:43,868 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:43,868 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:43,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:43,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [797914958] [2020-11-30 01:59:43,964 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2020-11-30 01:59:43,964 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:43,964 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:43,964 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:43,964 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:44,596 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:44,608 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:44,663 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:44,674 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:45,116 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 01:59:45,275 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:59:45,591 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-11-30 01:59:45,794 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-11-30 01:59:45,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:45,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [3, 5, 5] total 18 [2020-11-30 01:59:45,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338340695] [2020-11-30 01:59:45,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-30 01:59:45,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:45,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-30 01:59:45,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2020-11-30 01:59:45,796 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 8 states. [2020-11-30 01:59:46,040 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-11-30 01:59:46,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:46,120 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2020-11-30 01:59:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-30 01:59:46,120 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-11-30 01:59:46,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:46,121 INFO L225 Difference]: With dead ends: 24 [2020-11-30 01:59:46,121 INFO L226 Difference]: Without dead ends: 24 [2020-11-30 01:59:46,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2020-11-30 01:59:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-11-30 01:59:46,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-11-30 01:59:46,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:59:46,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 01:59:46,124 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 9 [2020-11-30 01:59:46,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:46,124 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 01:59:46,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-30 01:59:46,124 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 01:59:46,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:59:46,124 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:46,124 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:46,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:46,334 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:46,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:46,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1512460873, now seen corresponding path program 1 times [2020-11-30 01:59:46,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:46,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904225727] [2020-11-30 01:59:46,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:46,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:46,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:46,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904225727] [2020-11-30 01:59:46,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:46,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 01:59:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295020909] [2020-11-30 01:59:46,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 01:59:46,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:46,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 01:59:46,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 01:59:46,403 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 5 states. [2020-11-30 01:59:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:46,489 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2020-11-30 01:59:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 01:59:46,492 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-30 01:59:46,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:46,492 INFO L225 Difference]: With dead ends: 23 [2020-11-30 01:59:46,492 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:59:46,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 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 01:59:46,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:59:46,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 01:59:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:59:46,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2020-11-30 01:59:46,495 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 11 [2020-11-30 01:59:46,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:46,495 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2020-11-30 01:59:46,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 01:59:46,495 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2020-11-30 01:59:46,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-30 01:59:46,495 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:46,496 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:46,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205 [2020-11-30 01:59:46,496 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:46,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:46,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1512460874, now seen corresponding path program 1 times [2020-11-30 01:59:46,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:46,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734080268] [2020-11-30 01:59:46,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:46,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734080268] [2020-11-30 01:59:46,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680394301] [2020-11-30 01:59:46,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:46,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:46,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-30 01:59:46,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:46,770 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:46,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:46,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:46,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1446922503] [2020-11-30 01:59:46,791 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2020-11-30 01:59:46,791 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:46,791 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:46,791 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:46,791 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:47,437 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:47,447 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:47,458 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 01:59:47,826 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:47,967 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 01:59:48,129 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 01:59:48,419 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 01:59:48,546 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2020-11-30 01:59:48,749 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 61 [2020-11-30 01:59:48,979 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-11-30 01:59:49,552 WARN L193 SmtUtils]: Spent 509.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 85 [2020-11-30 01:59:50,199 WARN L193 SmtUtils]: Spent 536.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 91 [2020-11-30 01:59:50,200 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:50,200 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [4, 4, 4] total 16 [2020-11-30 01:59:50,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906932780] [2020-11-30 01:59:50,201 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 01:59:50,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:50,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 01:59:50,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-11-30 01:59:50,202 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand 10 states. [2020-11-30 01:59:50,417 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 64 [2020-11-30 01:59:50,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:50,547 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-11-30 01:59:50,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 01:59:50,548 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-11-30 01:59:50,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:50,548 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:59:50,548 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 01:59:50,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2020-11-30 01:59:50,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 01:59:50,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-30 01:59:50,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 01:59:50,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2020-11-30 01:59:50,551 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 11 [2020-11-30 01:59:50,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:50,551 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2020-11-30 01:59:50,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 01:59:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2020-11-30 01:59:50,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:59:50,552 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:50,552 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:50,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:50,762 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:50,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:50,762 INFO L82 PathProgramCache]: Analyzing trace with hash -778742729, now seen corresponding path program 1 times [2020-11-30 01:59:50,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:50,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7825631] [2020-11-30 01:59:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:50,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:50,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:50,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7825631] [2020-11-30 01:59:50,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:50,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 01:59:50,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983131297] [2020-11-30 01:59:50,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 01:59:50,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:50,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 01:59:50,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-30 01:59:50,811 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand 6 states. [2020-11-30 01:59:50,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:50,871 INFO L93 Difference]: Finished difference Result 27 states and 32 transitions. [2020-11-30 01:59:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 01:59:50,871 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-11-30 01:59:50,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:50,872 INFO L225 Difference]: With dead ends: 27 [2020-11-30 01:59:50,872 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 01:59:50,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-30 01:59:50,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 01:59:50,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-11-30 01:59:50,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 01:59:50,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2020-11-30 01:59:50,874 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 14 [2020-11-30 01:59:50,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:50,874 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2020-11-30 01:59:50,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 01:59:50,874 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2020-11-30 01:59:50,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 01:59:50,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:50,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:50,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257 [2020-11-30 01:59:50,876 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:50,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:50,876 INFO L82 PathProgramCache]: Analyzing trace with hash -778742728, now seen corresponding path program 1 times [2020-11-30 01:59:50,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:50,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487713043] [2020-11-30 01:59:50,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:50,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:50,997 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:50,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487713043] [2020-11-30 01:59:50,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209581859] [2020-11-30 01:59:50,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:51,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:51,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-30 01:59:51,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:51,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:51,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:51,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1851373735] [2020-11-30 01:59:51,184 INFO L159 IcfgInterpreter]: Started Sifa with 13 locations of interest [2020-11-30 01:59:51,184 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:51,185 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:51,185 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:51,185 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:51,781 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:52,329 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 01:59:52,593 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 01:59:52,831 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 01:59:53,095 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 01:59:53,420 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 01:59:53,760 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 01:59:54,101 WARN L193 SmtUtils]: Spent 283.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 93 [2020-11-30 01:59:54,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 3 imperfect interpolant sequences. [2020-11-30 01:59:54,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [6, 6, 6] total 23 [2020-11-30 01:59:54,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423728616] [2020-11-30 01:59:54,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-30 01:59:54,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:54,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-30 01:59:54,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:59:54,103 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand 13 states. [2020-11-30 01:59:54,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:54,256 INFO L93 Difference]: Finished difference Result 28 states and 34 transitions. [2020-11-30 01:59:54,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 01:59:54,257 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 14 [2020-11-30 01:59:54,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:54,257 INFO L225 Difference]: With dead ends: 28 [2020-11-30 01:59:54,257 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 01:59:54,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-30 01:59:54,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 01:59:54,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2020-11-30 01:59:54,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 01:59:54,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 32 transitions. [2020-11-30 01:59:54,260 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 32 transitions. Word has length 14 [2020-11-30 01:59:54,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:54,260 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 32 transitions. [2020-11-30 01:59:54,260 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-30 01:59:54,260 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 32 transitions. [2020-11-30 01:59:54,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 01:59:54,261 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:54,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:54,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 01:59:54,474 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:54,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:54,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1628741520, now seen corresponding path program 1 times [2020-11-30 01:59:54,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:54,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280850851] [2020-11-30 01:59:54,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:54,635 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-11-30 01:59:54,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280850851] [2020-11-30 01:59:54,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 01:59:54,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 01:59:54,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761395483] [2020-11-30 01:59:54,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 01:59:54,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 01:59:54,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 01:59:54,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:59:54,636 INFO L87 Difference]: Start difference. First operand 27 states and 32 transitions. Second operand 4 states. [2020-11-30 01:59:54,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 01:59:54,654 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2020-11-30 01:59:54,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 01:59:54,654 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-11-30 01:59:54,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 01:59:54,655 INFO L225 Difference]: With dead ends: 26 [2020-11-30 01:59:54,655 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 01:59:54,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 01:59:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 01:59:54,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 01:59:54,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 01:59:54,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2020-11-30 01:59:54,656 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 15 [2020-11-30 01:59:54,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 01:59:54,656 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2020-11-30 01:59:54,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 01:59:54,657 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2020-11-30 01:59:54,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-30 01:59:54,657 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 01:59:54,657 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 01:59:54,657 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable303 [2020-11-30 01:59:54,657 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 01:59:54,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 01:59:54,658 INFO L82 PathProgramCache]: Analyzing trace with hash 1889787036, now seen corresponding path program 1 times [2020-11-30 01:59:54,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 01:59:54,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839354635] [2020-11-30 01:59:54,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 01:59:54,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:54,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839354635] [2020-11-30 01:59:54,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708845261] [2020-11-30 01:59:54,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 01:59:54,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 01:59:54,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-30 01:59:54,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 01:59:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:55,187 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 01:59:57,070 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2020-11-30 01:59:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 01:59:57,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [134364063] [2020-11-30 01:59:57,255 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 01:59:57,255 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 01:59:57,255 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 01:59:57,255 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 01:59:57,255 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 01:59:58,097 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 01:59:58,440 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 01:59:58,599 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 01:59:58,764 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 01:59:59,019 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 01:59:59,301 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 01:59:59,854 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:00:00,121 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:00,398 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:00:00,664 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:00,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:00,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2020-11-30 02:00:00,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176929720] [2020-11-30 02:00:00,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-30 02:00:00,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:00,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-30 02:00:00,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=946, Unknown=2, NotChecked=0, Total=1056 [2020-11-30 02:00:00,665 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand 20 states. [2020-11-30 02:00:01,187 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-11-30 02:00:01,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:01,248 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 02:00:01,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-30 02:00:01,249 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 17 [2020-11-30 02:00:01,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:01,249 INFO L225 Difference]: With dead ends: 34 [2020-11-30 02:00:01,249 INFO L226 Difference]: Without dead ends: 26 [2020-11-30 02:00:01,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=197, Invalid=1361, Unknown=2, NotChecked=0, Total=1560 [2020-11-30 02:00:01,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-11-30 02:00:01,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2020-11-30 02:00:01,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:00:01,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-11-30 02:00:01,252 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-11-30 02:00:01,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:01,253 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-11-30 02:00:01,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-30 02:00:01,253 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-11-30 02:00:01,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-30 02:00:01,253 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:01,253 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:01,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable304 [2020-11-30 02:00:01,454 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:01,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:01,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1570930603, now seen corresponding path program 2 times [2020-11-30 02:00:01,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:01,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573570320] [2020-11-30 02:00:01,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:01,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:01,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573570320] [2020-11-30 02:00:01,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563130891] [2020-11-30 02:00:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 02:00:01,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:00:01,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:01,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-30 02:00:01,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:01,992 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 02:00:01,992 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-11-30 02:00:02,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1922023564] [2020-11-30 02:00:02,379 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:00:02,379 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:02,379 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:02,379 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:02,379 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:03,124 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:03,385 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:00:03,643 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:00:03,905 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:04,207 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:04,687 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2020-11-30 02:00:04,916 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:05,195 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:00:05,518 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:05,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:05,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2020-11-30 02:00:05,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797776100] [2020-11-30 02:00:05,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-30 02:00:05,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:05,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-30 02:00:05,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=1043, Unknown=0, NotChecked=0, Total=1190 [2020-11-30 02:00:05,520 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 22 states. [2020-11-30 02:00:06,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:06,233 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2020-11-30 02:00:06,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-30 02:00:06,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 19 [2020-11-30 02:00:06,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:06,234 INFO L225 Difference]: With dead ends: 34 [2020-11-30 02:00:06,234 INFO L226 Difference]: Without dead ends: 34 [2020-11-30 02:00:06,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=257, Invalid=1635, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 02:00:06,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-11-30 02:00:06,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 31. [2020-11-30 02:00:06,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-11-30 02:00:06,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 36 transitions. [2020-11-30 02:00:06,237 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 36 transitions. Word has length 19 [2020-11-30 02:00:06,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:06,237 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 36 transitions. [2020-11-30 02:00:06,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-30 02:00:06,237 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 36 transitions. [2020-11-30 02:00:06,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-30 02:00:06,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:06,238 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 02:00:06,438 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:06,438 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:06,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:06,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1454122520, now seen corresponding path program 1 times [2020-11-30 02:00:06,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:06,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196081413] [2020-11-30 02:00:06,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:06,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:06,594 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:06,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196081413] [2020-11-30 02:00:06,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922289626] [2020-11-30 02:00:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:06,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-30 02:00:06,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:06,736 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:06,736 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:06,824 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:06,824 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [413502129] [2020-11-30 02:00:06,826 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:00:06,826 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:06,827 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:06,827 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:06,827 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:07,543 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:07,810 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:00:08,278 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:08,555 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:08,807 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:00:09,084 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:00:09,424 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:00:09,887 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:00:10,150 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:00:10,443 WARN L193 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:00:10,523 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:10,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:10,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 16 [2020-11-30 02:00:10,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477460002] [2020-11-30 02:00:10,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-30 02:00:10,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:10,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-30 02:00:10,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=751, Unknown=0, NotChecked=0, Total=870 [2020-11-30 02:00:10,525 INFO L87 Difference]: Start difference. First operand 31 states and 36 transitions. Second operand 16 states. [2020-11-30 02:00:10,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:10,898 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2020-11-30 02:00:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-30 02:00:10,899 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-30 02:00:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:10,900 INFO L225 Difference]: With dead ends: 55 [2020-11-30 02:00:10,900 INFO L226 Difference]: Without dead ends: 55 [2020-11-30 02:00:10,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:00:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-30 02:00:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 49. [2020-11-30 02:00:10,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-30 02:00:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-11-30 02:00:10,904 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 20 [2020-11-30 02:00:10,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:10,905 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-11-30 02:00:10,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-30 02:00:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-11-30 02:00:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 02:00:10,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:10,906 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:11,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:11,106 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:11,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:11,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1628674483, now seen corresponding path program 1 times [2020-11-30 02:00:11,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:11,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898730507] [2020-11-30 02:00:11,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:11,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:00:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898730507] [2020-11-30 02:00:11,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055514238] [2020-11-30 02:00:11,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 02:00:11,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:11,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-30 02:00:11,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:11,416 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:00:11,416 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-11-30 02:00:11,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [61809435] [2020-11-30 02:00:11,459 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:00:11,459 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:11,460 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:11,460 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:11,460 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:12,072 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:12,305 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:00:12,477 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:00:12,644 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:00:12,773 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:13,045 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:13,466 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:00:13,720 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:13,980 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:00:14,209 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:14,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:14,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2020-11-30 02:00:14,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400257249] [2020-11-30 02:00:14,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-30 02:00:14,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:14,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-30 02:00:14,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-11-30 02:00:14,210 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 14 states. [2020-11-30 02:00:14,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:14,476 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-11-30 02:00:14,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-30 02:00:14,477 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 22 [2020-11-30 02:00:14,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:14,477 INFO L225 Difference]: With dead ends: 53 [2020-11-30 02:00:14,477 INFO L226 Difference]: Without dead ends: 53 [2020-11-30 02:00:14,478 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2020-11-30 02:00:14,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-11-30 02:00:14,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2020-11-30 02:00:14,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-11-30 02:00:14,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2020-11-30 02:00:14,481 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 22 [2020-11-30 02:00:14,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:14,482 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2020-11-30 02:00:14,482 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-30 02:00:14,482 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2020-11-30 02:00:14,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-30 02:00:14,483 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:14,483 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:14,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:14,702 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -2069322420, now seen corresponding path program 2 times [2020-11-30 02:00:14,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:14,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879737991] [2020-11-30 02:00:14,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:14,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:14,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879737991] [2020-11-30 02:00:14,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463103369] [2020-11-30 02:00:14,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:14,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-30 02:00:14,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-30 02:00:14,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-30 02:00:15,217 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:15,507 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-11-30 02:00:15,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [440962798] [2020-11-30 02:00:15,509 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:00:15,509 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:15,509 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:15,510 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:15,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:15,907 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:15,921 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:15,973 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:16,306 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:16,691 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:00:17,080 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 02:00:17,494 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:17,805 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:18,079 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:00:18,383 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:00:18,747 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:00:19,261 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2020-11-30 02:00:19,538 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:00:19,857 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:00:19,953 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:19,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:19,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 21 [2020-11-30 02:00:19,953 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459921011] [2020-11-30 02:00:19,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-30 02:00:19,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:19,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-30 02:00:19,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=1191, Unknown=0, NotChecked=0, Total=1332 [2020-11-30 02:00:19,954 INFO L87 Difference]: Start difference. First operand 51 states and 58 transitions. Second operand 23 states. [2020-11-30 02:00:20,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:20,914 INFO L93 Difference]: Finished difference Result 68 states and 78 transitions. [2020-11-30 02:00:20,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-30 02:00:20,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 22 [2020-11-30 02:00:20,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:20,916 INFO L225 Difference]: With dead ends: 68 [2020-11-30 02:00:20,916 INFO L226 Difference]: Without dead ends: 68 [2020-11-30 02:00:20,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=318, Invalid=2132, Unknown=0, NotChecked=0, Total=2450 [2020-11-30 02:00:20,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-30 02:00:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 59. [2020-11-30 02:00:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-30 02:00:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2020-11-30 02:00:20,921 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 22 [2020-11-30 02:00:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:20,921 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2020-11-30 02:00:20,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-30 02:00:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2020-11-30 02:00:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-30 02:00:20,922 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:20,923 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:21,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2020-11-30 02:00:21,123 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 405083751, now seen corresponding path program 3 times [2020-11-30 02:00:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:21,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265842910] [2020-11-30 02:00:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:21,517 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:21,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265842910] [2020-11-30 02:00:21,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088788220] [2020-11-30 02:00:21,518 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:21,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:00:21,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:21,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-30 02:00:21,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:22,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:26,332 WARN L193 SmtUtils]: Spent 639.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-11-30 02:00:26,509 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:26,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [628119127] [2020-11-30 02:00:26,511 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:00:26,511 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:26,511 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:26,511 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:26,511 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:27,216 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:27,588 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:00:28,168 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:28,515 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:29,042 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:00:29,290 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:29,582 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:00:29,937 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:29,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:29,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 29 [2020-11-30 02:00:29,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664419886] [2020-11-30 02:00:29,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:00:29,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:29,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:00:29,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1657, Unknown=3, NotChecked=0, Total=1806 [2020-11-30 02:00:29,939 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand 30 states. [2020-11-30 02:00:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:30,603 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2020-11-30 02:00:30,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-30 02:00:30,604 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 25 [2020-11-30 02:00:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:30,605 INFO L225 Difference]: With dead ends: 97 [2020-11-30 02:00:30,605 INFO L226 Difference]: Without dead ends: 83 [2020-11-30 02:00:30,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=273, Invalid=2376, Unknown=3, NotChecked=0, Total=2652 [2020-11-30 02:00:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-30 02:00:30,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 81. [2020-11-30 02:00:30,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-30 02:00:30,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-11-30 02:00:30,618 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 25 [2020-11-30 02:00:30,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:30,618 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-11-30 02:00:30,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:00:30,619 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-11-30 02:00:30,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-30 02:00:30,621 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:30,621 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 02:00:30,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2020-11-30 02:00:30,834 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:30,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:30,834 INFO L82 PathProgramCache]: Analyzing trace with hash 200650133, now seen corresponding path program 3 times [2020-11-30 02:00:30,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:30,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527465047] [2020-11-30 02:00:30,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:30,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:31,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:31,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527465047] [2020-11-30 02:00:31,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743834407] [2020-11-30 02:00:31,119 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:31,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:00:31,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 02:00:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:31,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:31,440 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:31,699 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:31,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [930126396] [2020-11-30 02:00:31,700 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:00:31,700 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:31,701 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:31,701 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:31,701 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:32,424 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:32,709 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:00:33,236 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:33,547 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:33,824 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:00:34,138 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:00:34,514 WARN L193 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:00:35,030 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:00:35,301 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:00:35,622 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:00:35,712 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:35,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:35,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 28 [2020-11-30 02:00:35,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205517059] [2020-11-30 02:00:35,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 02:00:35,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:35,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 02:00:35,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=1552, Unknown=0, NotChecked=0, Total=1722 [2020-11-30 02:00:35,714 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 28 states. [2020-11-30 02:00:36,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:36,448 INFO L93 Difference]: Finished difference Result 131 states and 145 transitions. [2020-11-30 02:00:36,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 02:00:36,449 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 26 [2020-11-30 02:00:36,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:36,450 INFO L225 Difference]: With dead ends: 131 [2020-11-30 02:00:36,450 INFO L226 Difference]: Without dead ends: 119 [2020-11-30 02:00:36,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 4 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2020-11-30 02:00:36,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-30 02:00:36,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 109. [2020-11-30 02:00:36,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-30 02:00:36,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 125 transitions. [2020-11-30 02:00:36,456 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 125 transitions. Word has length 26 [2020-11-30 02:00:36,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:36,456 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 125 transitions. [2020-11-30 02:00:36,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 02:00:36,456 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 125 transitions. [2020-11-30 02:00:36,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-30 02:00:36,457 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:36,457 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:36,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:36,670 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:36,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:36,670 INFO L82 PathProgramCache]: Analyzing trace with hash 956297504, now seen corresponding path program 4 times [2020-11-30 02:00:36,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:36,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494606235] [2020-11-30 02:00:36,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:36,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:36,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:36,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494606235] [2020-11-30 02:00:36,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184891108] [2020-11-30 02:00:36,793 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:36,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:36,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-30 02:00:36,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:37,101 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:37,101 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:37,371 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:37,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1012282462] [2020-11-30 02:00:37,373 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:00:37,373 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:37,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:37,373 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:37,373 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:38,015 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:38,299 WARN L193 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:00:38,848 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:39,171 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:39,690 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:00:39,944 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:40,242 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:00:40,580 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:40,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:40,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 26 [2020-11-30 02:00:40,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430307135] [2020-11-30 02:00:40,580 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-30 02:00:40,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:40,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-30 02:00:40,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1475, Unknown=0, NotChecked=0, Total=1640 [2020-11-30 02:00:40,582 INFO L87 Difference]: Start difference. First operand 109 states and 125 transitions. Second operand 28 states. [2020-11-30 02:00:41,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:41,354 INFO L93 Difference]: Finished difference Result 144 states and 161 transitions. [2020-11-30 02:00:41,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-30 02:00:41,355 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 27 [2020-11-30 02:00:41,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:41,356 INFO L225 Difference]: With dead ends: 144 [2020-11-30 02:00:41,356 INFO L226 Difference]: Without dead ends: 144 [2020-11-30 02:00:41,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 585 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=366, Invalid=2390, Unknown=0, NotChecked=0, Total=2756 [2020-11-30 02:00:41,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-11-30 02:00:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 138. [2020-11-30 02:00:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-30 02:00:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 158 transitions. [2020-11-30 02:00:41,362 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 158 transitions. Word has length 27 [2020-11-30 02:00:41,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:41,363 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 158 transitions. [2020-11-30 02:00:41,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-30 02:00:41,363 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 158 transitions. [2020-11-30 02:00:41,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-30 02:00:41,364 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:41,365 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:41,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2020-11-30 02:00:41,565 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:41,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:41,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1396006393, now seen corresponding path program 4 times [2020-11-30 02:00:41,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:41,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137601226] [2020-11-30 02:00:41,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:41,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137601226] [2020-11-30 02:00:41,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076523] [2020-11-30 02:00:41,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/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 02:00:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-30 02:00:41,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:41,989 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:41,989 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:42,181 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:42,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1941259912] [2020-11-30 02:00:42,183 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:00:42,183 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:42,183 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:42,183 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:42,184 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:42,576 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:42,584 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:42,591 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:00:42,831 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:43,095 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:00:43,456 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 02:00:43,883 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:44,208 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:44,505 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:00:44,838 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:00:45,216 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:00:45,845 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 133 [2020-11-30 02:00:46,128 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:00:46,459 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:00:46,567 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:46,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:46,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 25 [2020-11-30 02:00:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659414132] [2020-11-30 02:00:46,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-30 02:00:46,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-30 02:00:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=1407, Unknown=0, NotChecked=0, Total=1560 [2020-11-30 02:00:46,568 INFO L87 Difference]: Start difference. First operand 138 states and 158 transitions. Second operand 26 states. [2020-11-30 02:00:47,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:47,247 INFO L93 Difference]: Finished difference Result 178 states and 202 transitions. [2020-11-30 02:00:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-30 02:00:47,248 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-11-30 02:00:47,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:47,250 INFO L225 Difference]: With dead ends: 178 [2020-11-30 02:00:47,250 INFO L226 Difference]: Without dead ends: 178 [2020-11-30 02:00:47,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 565 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=345, Invalid=2205, Unknown=0, NotChecked=0, Total=2550 [2020-11-30 02:00:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-30 02:00:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 154. [2020-11-30 02:00:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-11-30 02:00:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 177 transitions. [2020-11-30 02:00:47,257 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 177 transitions. Word has length 28 [2020-11-30 02:00:47,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:47,257 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 177 transitions. [2020-11-30 02:00:47,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-30 02:00:47,257 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 177 transitions. [2020-11-30 02:00:47,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-30 02:00:47,258 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:47,259 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:47,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2020-11-30 02:00:47,482 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:47,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:47,482 INFO L82 PathProgramCache]: Analyzing trace with hash -554940478, now seen corresponding path program 5 times [2020-11-30 02:00:47,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:47,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768715215] [2020-11-30 02:00:47,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:47,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:00:47,811 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768715215] [2020-11-30 02:00:47,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086898460] [2020-11-30 02:00:47,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:47,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 02:00:47,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:47,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 47 conjunts are in the unsatisfiable core [2020-11-30 02:00:47,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:48,235 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:48,235 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 8 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:00:48,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1596927871] [2020-11-30 02:00:48,427 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:00:48,428 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:48,428 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:48,428 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:48,428 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:49,220 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:49,563 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:00:49,707 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:00:49,859 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:00:50,170 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:50,321 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:00:50,524 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:50,844 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:00:51,191 WARN L193 SmtUtils]: Spent 255.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:00:51,611 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:00:52,264 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:00:52,573 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:00:52,940 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:00:53,050 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:00:53,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:00:53,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14, 14] total 30 [2020-11-30 02:00:53,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666757253] [2020-11-30 02:00:53,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:00:53,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:00:53,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:00:53,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=1720, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 02:00:53,052 INFO L87 Difference]: Start difference. First operand 154 states and 177 transitions. Second operand 30 states. [2020-11-30 02:00:54,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:00:54,631 INFO L93 Difference]: Finished difference Result 243 states and 271 transitions. [2020-11-30 02:00:54,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-30 02:00:54,632 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 32 [2020-11-30 02:00:54,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:00:54,634 INFO L225 Difference]: With dead ends: 243 [2020-11-30 02:00:54,634 INFO L226 Difference]: Without dead ends: 227 [2020-11-30 02:00:54,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 65 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1186 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=490, Invalid=3932, Unknown=0, NotChecked=0, Total=4422 [2020-11-30 02:00:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-11-30 02:00:54,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 204. [2020-11-30 02:00:54,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-30 02:00:54,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 235 transitions. [2020-11-30 02:00:54,643 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 235 transitions. Word has length 32 [2020-11-30 02:00:54,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:00:54,643 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 235 transitions. [2020-11-30 02:00:54,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:00:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 235 transitions. [2020-11-30 02:00:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-30 02:00:54,644 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:00:54,644 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:00:54,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable805,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:54,858 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:00:54,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:00:54,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1506050802, now seen corresponding path program 5 times [2020-11-30 02:00:54,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:00:54,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673606439] [2020-11-30 02:00:54,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:00:54,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:00:55,121 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:55,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673606439] [2020-11-30 02:00:55,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123911603] [2020-11-30 02:00:55,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:00:55,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-30 02:00:55,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:00:55,212 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-30 02:00:55,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:00:55,812 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:55,812 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:00:56,431 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:00:56,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1599688642] [2020-11-30 02:00:56,432 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:00:56,433 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:00:56,433 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:00:56,433 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:00:56,433 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:00:57,061 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:00:57,417 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:00:57,737 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:00:57,911 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:00:58,100 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:00:58,275 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:00:58,480 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:00:59,083 WARN L193 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2020-11-30 02:00:59,390 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:00:59,740 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:01:00,192 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:00,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:00,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 33 [2020-11-30 02:01:00,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877942398] [2020-11-30 02:01:00,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-30 02:01:00,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:00,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-30 02:01:00,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=1995, Unknown=0, NotChecked=0, Total=2162 [2020-11-30 02:01:00,195 INFO L87 Difference]: Start difference. First operand 204 states and 235 transitions. Second operand 34 states. [2020-11-30 02:01:01,280 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 50 [2020-11-30 02:01:07,089 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:01:11,259 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 71 DAG size of output: 63 [2020-11-30 02:01:11,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:11,320 INFO L93 Difference]: Finished difference Result 333 states and 376 transitions. [2020-11-30 02:01:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-30 02:01:11,321 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 33 [2020-11-30 02:01:11,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:11,322 INFO L225 Difference]: With dead ends: 333 [2020-11-30 02:01:11,322 INFO L226 Difference]: Without dead ends: 255 [2020-11-30 02:01:11,324 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=439, Invalid=3593, Unknown=0, NotChecked=0, Total=4032 [2020-11-30 02:01:11,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-11-30 02:01:11,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 234. [2020-11-30 02:01:11,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-30 02:01:11,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 271 transitions. [2020-11-30 02:01:11,331 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 271 transitions. Word has length 33 [2020-11-30 02:01:11,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:11,331 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 271 transitions. [2020-11-30 02:01:11,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-30 02:01:11,331 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 271 transitions. [2020-11-30 02:01:11,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-30 02:01:11,332 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:11,332 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:11,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2020-11-30 02:01:11,532 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:11,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:11,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1838619942, now seen corresponding path program 6 times [2020-11-30 02:01:11,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:11,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261703681] [2020-11-30 02:01:11,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:11,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 4 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:11,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261703681] [2020-11-30 02:01:11,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109388132] [2020-11-30 02:01:11,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:11,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:01:11,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:01:11,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-30 02:01:11,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:11,986 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:12,286 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:12,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2007862063] [2020-11-30 02:01:12,288 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:01:12,289 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:12,289 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:01:12,289 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:01:12,289 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:01:12,906 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:01:13,217 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:01:13,511 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:01:13,671 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:01:13,842 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:01:14,005 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:01:14,207 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:01:14,534 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:01:14,899 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:01:15,329 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:01:16,026 WARN L193 SmtUtils]: Spent 471.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:01:16,348 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:01:16,718 WARN L193 SmtUtils]: Spent 276.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:01:16,831 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:16,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:16,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 29 [2020-11-30 02:01:16,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828004975] [2020-11-30 02:01:16,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:01:16,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:16,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:01:16,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 02:01:16,833 INFO L87 Difference]: Start difference. First operand 234 states and 271 transitions. Second operand 30 states. [2020-11-30 02:01:17,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:17,827 INFO L93 Difference]: Finished difference Result 298 states and 340 transitions. [2020-11-30 02:01:17,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-30 02:01:17,827 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-30 02:01:17,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:17,829 INFO L225 Difference]: With dead ends: 298 [2020-11-30 02:01:17,829 INFO L226 Difference]: Without dead ends: 298 [2020-11-30 02:01:17,830 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=466, Invalid=2840, Unknown=0, NotChecked=0, Total=3306 [2020-11-30 02:01:17,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-30 02:01:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 254. [2020-11-30 02:01:17,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-11-30 02:01:17,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 295 transitions. [2020-11-30 02:01:17,838 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 295 transitions. Word has length 34 [2020-11-30 02:01:17,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:17,838 INFO L481 AbstractCegarLoop]: Abstraction has 254 states and 295 transitions. [2020-11-30 02:01:17,839 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:01:17,839 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 295 transitions. [2020-11-30 02:01:17,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-30 02:01:17,839 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:17,839 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:18,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:18,040 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:18,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:18,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1822004395, now seen corresponding path program 6 times [2020-11-30 02:01:18,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:18,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628528859] [2020-11-30 02:01:18,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:18,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:18,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:18,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628528859] [2020-11-30 02:01:18,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451162] [2020-11-30 02:01:18,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:18,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-30 02:01:18,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:01:18,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 46 conjunts are in the unsatisfiable core [2020-11-30 02:01:18,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:18,951 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:18,952 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:19,527 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:19,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [946092268] [2020-11-30 02:01:19,529 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:01:19,529 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:19,529 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:01:19,529 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:01:19,529 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:01:20,207 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:01:20,513 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:01:20,668 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:01:20,842 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:01:21,013 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:01:21,207 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:01:21,387 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:01:21,615 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:01:22,291 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:01:22,597 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:01:22,956 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:01:23,386 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:23,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:23,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 32 [2020-11-30 02:01:23,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75748095] [2020-11-30 02:01:23,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-30 02:01:23,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:23,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-30 02:01:23,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2020-11-30 02:01:23,387 INFO L87 Difference]: Start difference. First operand 254 states and 295 transitions. Second operand 34 states. [2020-11-30 02:01:24,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:24,773 INFO L93 Difference]: Finished difference Result 335 states and 380 transitions. [2020-11-30 02:01:24,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 02:01:24,774 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 35 [2020-11-30 02:01:24,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:24,776 INFO L225 Difference]: With dead ends: 335 [2020-11-30 02:01:24,776 INFO L226 Difference]: Without dead ends: 335 [2020-11-30 02:01:24,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 869 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=553, Invalid=3479, Unknown=0, NotChecked=0, Total=4032 [2020-11-30 02:01:24,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-11-30 02:01:24,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 305. [2020-11-30 02:01:24,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 305 states. [2020-11-30 02:01:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 354 transitions. [2020-11-30 02:01:24,786 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 354 transitions. Word has length 35 [2020-11-30 02:01:24,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:24,786 INFO L481 AbstractCegarLoop]: Abstraction has 305 states and 354 transitions. [2020-11-30 02:01:24,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-30 02:01:24,786 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 354 transitions. [2020-11-30 02:01:24,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-30 02:01:24,787 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:24,787 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:24,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2020-11-30 02:01:24,988 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:24,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:24,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1724950639, now seen corresponding path program 7 times [2020-11-30 02:01:24,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:24,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907152411] [2020-11-30 02:01:24,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:25,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:25,468 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907152411] [2020-11-30 02:01:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046046182] [2020-11-30 02:01:25,468 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:25,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-30 02:01:25,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:25,853 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:25,853 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 11 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:26,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [911157673] [2020-11-30 02:01:26,110 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:01:26,110 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:26,111 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:01:26,111 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:01:26,111 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:01:26,460 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:01:26,470 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:01:26,478 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:01:26,730 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:01:27,070 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:01:27,542 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 81 [2020-11-30 02:01:27,715 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:01:27,883 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:01:28,075 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:01:28,259 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:01:28,477 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:01:28,818 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:01:29,193 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:01:29,652 WARN L193 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:01:30,316 WARN L193 SmtUtils]: Spent 435.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:01:30,661 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:01:31,057 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:01:31,188 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:31,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:31,188 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 30 [2020-11-30 02:01:31,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540969305] [2020-11-30 02:01:31,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-30 02:01:31,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:31,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-30 02:01:31,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=1736, Unknown=0, NotChecked=0, Total=1892 [2020-11-30 02:01:31,190 INFO L87 Difference]: Start difference. First operand 305 states and 354 transitions. Second operand 30 states. [2020-11-30 02:01:33,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:33,216 INFO L93 Difference]: Finished difference Result 489 states and 552 transitions. [2020-11-30 02:01:33,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-30 02:01:33,218 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 38 [2020-11-30 02:01:33,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:33,221 INFO L225 Difference]: With dead ends: 489 [2020-11-30 02:01:33,221 INFO L226 Difference]: Without dead ends: 435 [2020-11-30 02:01:33,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 81 SyntacticMatches, 5 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 2 DeprecatedPredicates, 1066 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=470, Invalid=3952, Unknown=0, NotChecked=0, Total=4422 [2020-11-30 02:01:33,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-11-30 02:01:33,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 387. [2020-11-30 02:01:33,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 387 states. [2020-11-30 02:01:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 387 states to 387 states and 450 transitions. [2020-11-30 02:01:33,233 INFO L78 Accepts]: Start accepts. Automaton has 387 states and 450 transitions. Word has length 38 [2020-11-30 02:01:33,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:33,234 INFO L481 AbstractCegarLoop]: Abstraction has 387 states and 450 transitions. [2020-11-30 02:01:33,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-30 02:01:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 387 states and 450 transitions. [2020-11-30 02:01:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-30 02:01:33,235 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:33,235 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:33,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1030,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:33,450 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:33,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:33,450 INFO L82 PathProgramCache]: Analyzing trace with hash 121037523, now seen corresponding path program 8 times [2020-11-30 02:01:33,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:33,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369860654] [2020-11-30 02:01:33,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:33,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:33,783 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 48 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-11-30 02:01:33,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369860654] [2020-11-30 02:01:33,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033898432] [2020-11-30 02:01:33,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:33,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 02:01:33,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:01:33,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 44 conjunts are in the unsatisfiable core [2020-11-30 02:01:33,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:34,169 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-11-30 02:01:34,169 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:34,619 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-11-30 02:01:34,620 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [209600644] [2020-11-30 02:01:34,621 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2020-11-30 02:01:34,621 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:34,621 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:01:34,621 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:01:34,621 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:01:35,243 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:01:35,567 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 70 [2020-11-30 02:01:35,726 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:01:35,906 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:01:36,089 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:01:36,297 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:01:36,486 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:01:36,717 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:01:37,078 WARN L193 SmtUtils]: Spent 264.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 76 [2020-11-30 02:01:37,476 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-11-30 02:01:37,941 WARN L193 SmtUtils]: Spent 347.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 88 [2020-11-30 02:01:38,641 WARN L193 SmtUtils]: Spent 469.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 132 [2020-11-30 02:01:38,992 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 66 [2020-11-30 02:01:39,397 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 80 [2020-11-30 02:01:39,575 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:39,575 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:39,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7, 7] total 27 [2020-11-30 02:01:39,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945315672] [2020-11-30 02:01:39,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-30 02:01:39,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:39,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-30 02:01:39,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1632, Unknown=0, NotChecked=0, Total=1806 [2020-11-30 02:01:39,577 INFO L87 Difference]: Start difference. First operand 387 states and 450 transitions. Second operand 29 states. [2020-11-30 02:01:40,576 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 40 [2020-11-30 02:01:41,167 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 41 [2020-11-30 02:01:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:44,171 INFO L93 Difference]: Finished difference Result 459 states and 518 transitions. [2020-11-30 02:01:44,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-30 02:01:44,173 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 40 [2020-11-30 02:01:44,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:44,174 INFO L225 Difference]: With dead ends: 459 [2020-11-30 02:01:44,175 INFO L226 Difference]: Without dead ends: 374 [2020-11-30 02:01:44,175 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1330, Invalid=5980, Unknown=0, NotChecked=0, Total=7310 [2020-11-30 02:01:44,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-11-30 02:01:44,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 262. [2020-11-30 02:01:44,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-11-30 02:01:44,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 300 transitions. [2020-11-30 02:01:44,184 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 300 transitions. Word has length 40 [2020-11-30 02:01:44,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:44,184 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 300 transitions. [2020-11-30 02:01:44,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-30 02:01:44,185 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 300 transitions. [2020-11-30 02:01:44,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-30 02:01:44,185 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:44,186 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:44,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1084,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:44,405 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:44,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:44,405 INFO L82 PathProgramCache]: Analyzing trace with hash 123343421, now seen corresponding path program 7 times [2020-11-30 02:01:44,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:44,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251565897] [2020-11-30 02:01:44,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:44,890 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:44,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251565897] [2020-11-30 02:01:44,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391954852] [2020-11-30 02:01:44,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:44,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:44,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 59 conjunts are in the unsatisfiable core [2020-11-30 02:01:44,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:45,862 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:01:51,759 WARN L193 SmtUtils]: Spent 958.00 ms on a formula simplification that was a NOOP. DAG size: 18 [2020-11-30 02:01:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 17 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:52,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1379130845] [2020-11-30 02:01:52,229 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:01:52,229 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:01:52,229 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:01:52,230 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:01:52,230 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:01:52,918 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:01:53,261 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:01:53,445 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:01:53,654 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:01:53,874 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:01:54,099 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:01:54,312 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:01:54,571 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:01:55,312 WARN L193 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 129 [2020-11-30 02:01:55,657 WARN L193 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:01:56,050 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:01:56,588 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:01:56,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:01:56,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 37 [2020-11-30 02:01:56,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904467464] [2020-11-30 02:01:56,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-30 02:01:56,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:01:56,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-30 02:01:56,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=2378, Unknown=5, NotChecked=0, Total=2550 [2020-11-30 02:01:56,589 INFO L87 Difference]: Start difference. First operand 262 states and 300 transitions. Second operand 38 states. [2020-11-30 02:01:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:01:58,382 INFO L93 Difference]: Finished difference Result 466 states and 526 transitions. [2020-11-30 02:01:58,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-30 02:01:58,384 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-30 02:01:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:01:58,385 INFO L225 Difference]: With dead ends: 466 [2020-11-30 02:01:58,385 INFO L226 Difference]: Without dead ends: 265 [2020-11-30 02:01:58,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=334, Invalid=3693, Unknown=5, NotChecked=0, Total=4032 [2020-11-30 02:01:58,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-11-30 02:01:58,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2020-11-30 02:01:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-30 02:01:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 302 transitions. [2020-11-30 02:01:58,393 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 302 transitions. Word has length 41 [2020-11-30 02:01:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:01:58,393 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 302 transitions. [2020-11-30 02:01:58,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-30 02:01:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 302 transitions. [2020-11-30 02:01:58,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-30 02:01:58,394 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:01:58,394 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:01:58,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1139 [2020-11-30 02:01:58,618 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-30 02:01:58,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:01:58,618 INFO L82 PathProgramCache]: Analyzing trace with hash 637688566, now seen corresponding path program 8 times [2020-11-30 02:01:58,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:01:58,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257274648] [2020-11-30 02:01:58,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:01:58,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:01:58,887 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 12 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-11-30 02:01:58,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257274648] [2020-11-30 02:01:58,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553783481] [2020-11-30 02:01:58,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:01:58,983 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-30 02:01:58,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-30 02:01:58,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 283 conjuncts, 70 conjunts are in the unsatisfiable core [2020-11-30 02:01:58,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:01:59,940 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 21 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-30 02:01:59,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:02:01,049 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-11-30 02:02:01,624 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 30 [2020-11-30 02:02:01,647 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-11-30 02:02:01,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1795580592] [2020-11-30 02:02:01,649 INFO L159 IcfgInterpreter]: Started Sifa with 14 locations of interest [2020-11-30 02:02:01,649 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:02:01,649 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:02:01,649 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:02:01,650 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:02:02,328 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:02:02,691 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 65 [2020-11-30 02:02:02,903 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 36 [2020-11-30 02:02:03,136 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-11-30 02:02:03,362 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-11-30 02:02:03,618 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 44 [2020-11-30 02:02:03,845 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2020-11-30 02:02:04,113 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-11-30 02:02:04,919 WARN L193 SmtUtils]: Spent 493.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 131 [2020-11-30 02:02:05,296 WARN L193 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 61 [2020-11-30 02:02:05,721 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 75 [2020-11-30 02:02:06,327 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:02:06,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:02:06,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14, 14] total 40 [2020-11-30 02:02:06,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098728547] [2020-11-30 02:02:06,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-30 02:02:06,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:02:06,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-30 02:02:06,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=2724, Unknown=0, NotChecked=0, Total=2970 [2020-11-30 02:02:06,329 INFO L87 Difference]: Start difference. First operand 264 states and 302 transitions. Second operand 42 states. [2020-11-30 02:02:07,662 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-11-30 02:02:07,897 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 57 [2020-11-30 02:02:08,340 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 61 [2020-11-30 02:02:08,537 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-11-30 02:02:08,801 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-11-30 02:02:09,086 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-30 02:02:09,333 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-11-30 02:02:09,633 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2020-11-30 02:02:09,909 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-30 02:02:10,142 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-11-30 02:02:10,455 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-30 02:02:10,675 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 53 [2020-11-30 02:02:10,904 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 58 [2020-11-30 02:02:11,176 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-11-30 02:02:11,445 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 69 [2020-11-30 02:02:11,663 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 55 [2020-11-30 02:02:11,984 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 63 [2020-11-30 02:02:12,179 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-11-30 02:02:12,421 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 58 [2020-11-30 02:02:12,667 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 58 [2020-11-30 02:02:12,945 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 68 [2020-11-30 02:02:13,186 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2020-11-30 02:02:13,501 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 62 [2020-11-30 02:02:13,708 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-11-30 02:02:13,915 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 55 [2020-11-30 02:02:14,162 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-11-30 02:02:14,550 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-30 02:02:14,962 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-11-30 02:02:15,492 WARN L193 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-11-30 02:02:15,968 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 83 [2020-11-30 02:02:16,320 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 63 [2020-11-30 02:02:16,673 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-11-30 02:02:17,055 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 80 [2020-11-30 02:02:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:02:17,066 INFO L93 Difference]: Finished difference Result 319 states and 360 transitions. [2020-11-30 02:02:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-11-30 02:02:17,068 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 43 [2020-11-30 02:02:17,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:02:17,068 INFO L225 Difference]: With dead ends: 319 [2020-11-30 02:02:17,068 INFO L226 Difference]: Without dead ends: 0 [2020-11-30 02:02:17,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2012 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1638, Invalid=8064, Unknown=0, NotChecked=0, Total=9702 [2020-11-30 02:02:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-30 02:02:17,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-30 02:02:17,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-11-30 02:02:17,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-30 02:02:17,069 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2020-11-30 02:02:17,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:02:17,069 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-30 02:02:17,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-30 02:02:17,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-30 02:02:17,070 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-30 02:02:17,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2020-11-30 02:02:17,273 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:02:17 BoogieIcfgContainer [2020-11-30 02:02:17,274 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:02:17,274 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:02:17,274 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:02:17,274 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:02:17,275 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 01:59:32" (3/4) ... [2020-11-30 02:02:17,277 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-11-30 02:02:17,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2020-11-30 02:02:17,287 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2020-11-30 02:02:17,288 INFO L902 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-11-30 02:02:17,332 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud-vcloud-master/worker/run_dir_26a5c71b-471b-4f29-9cc2-94251da8d9d8/bin/utaipan/witness.graphml [2020-11-30 02:02:17,332 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:02:17,333 INFO L168 Benchmark]: Toolchain (without parser) took 165992.66 ms. Allocated memory was 111.1 MB in the beginning and 293.6 MB in the end (delta: 182.5 MB). Free memory was 85.9 MB in the beginning and 95.0 MB in the end (delta: -9.2 MB). Peak memory consumption was 171.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,333 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:02:17,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 491.83 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 76.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.22 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,333 INFO L168 Benchmark]: Boogie Preprocessor took 51.04 ms. Allocated memory is still 111.1 MB. Free memory was 74.0 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,334 INFO L168 Benchmark]: RCFGBuilder took 741.02 ms. Allocated memory is still 111.1 MB. Free memory was 72.6 MB in the beginning and 77.1 MB in the end (delta: -4.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,334 INFO L168 Benchmark]: TraceAbstraction took 164589.88 ms. Allocated memory was 111.1 MB in the beginning and 293.6 MB in the end (delta: 182.5 MB). Free memory was 76.5 MB in the beginning and 97.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 160.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,334 INFO L168 Benchmark]: Witness Printer took 58.06 ms. Allocated memory is still 293.6 MB. Free memory was 97.7 MB in the beginning and 95.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:02:17,335 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 79.7 MB. Free memory is still 41.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 491.83 ms. Allocated memory is still 111.1 MB. Free memory was 85.9 MB in the beginning and 76.0 MB in the end (delta: 9.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 52.22 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 51.04 ms. Allocated memory is still 111.1 MB. Free memory was 74.0 MB in the beginning and 72.6 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 741.02 ms. Allocated memory is still 111.1 MB. Free memory was 72.6 MB in the beginning and 77.1 MB in the end (delta: -4.5 MB). Peak memory consumption was 25.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 164589.88 ms. Allocated memory was 111.1 MB in the beginning and 293.6 MB in the end (delta: 182.5 MB). Free memory was 76.5 MB in the beginning and 97.7 MB in the end (delta: -21.2 MB). Peak memory consumption was 160.8 MB. Max. memory is 16.1 GB. * Witness Printer took 58.06 ms. Allocated memory is still 293.6 MB. Free memory was 97.7 MB in the beginning and 95.0 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 539]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 519]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 543]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 547]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 546]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 518]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - AllSpecificationsHoldResult: All specifications hold 13 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 31 locations, 13 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 164.5s, OverallIterations: 31, TraceHistogramMax: 5, AutomataDifference: 42.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 577 SDtfs, 3887 SDslu, 4083 SDs, 0 SdLazy, 7868 SolverSat, 925 SolverUnsat, 1 SolverUnknown, 0 SolverNotchecked, 7.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2179 GetRequests, 1053 SyntacticMatches, 22 SemanticMatches, 1104 ConstructedPredicates, 0 IntricatePredicates, 8 DeprecatedPredicates, 14150 ImplicationChecksByTransitivity, 125.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=387occurred in iteration=28, 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, 31 MinimizatonAttempts, 353 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 1.1s SatisfiabilityAnalysisTime, 31.2s InterpolantComputationTime, 1184 NumberOfCodeBlocks, 1167 NumberOfCodeBlocksAsserted, 74 NumberOfCheckSat, 1668 ConstructedInterpolants, 134 QuantifiedInterpolants, 625660 SizeOfPredicates, 368 NumberOfNonLiveVariables, 3839 ConjunctsInSsa, 798 ConjunctsInUnsatCore, 79 InterpolantComputations, 7 PerfectInterpolantSequences, 658/1544 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: OVERALL_TIME[ms]: 2892, ICFG_INTERPRETER_ENTERED_PROCEDURES: 4, DAG_INTERPRETER_EARLY_EXIT_QUERIES_NONTRIVIAL: 38, DAG_INTERPRETER_EARLY_EXITS: 1, TOOLS_POST_APPLICATIONS: 74, TOOLS_POST_TIME[ms]: 1870, TOOLS_POST_CALL_APPLICATIONS: 0, TOOLS_POST_CALL_TIME[ms]: 0, TOOLS_POST_RETURN_APPLICATIONS: 0, TOOLS_POST_RETURN_TIME[ms]: 0, TOOLS_QUANTIFIERELIM_APPLICATIONS: 74, TOOLS_QUANTIFIERELIM_TIME[ms]: 1849, TOOLS_QUANTIFIERELIM_MAX_TIME[ms]: 307, FLUID_QUERY_TIME[ms]: 4, FLUID_QUERIES: 156, FLUID_YES_ANSWERS: 0, DOMAIN_JOIN_APPLICATIONS: 12, DOMAIN_JOIN_TIME[ms]: 366, DOMAIN_ALPHA_APPLICATIONS: 0, DOMAIN_ALPHA_TIME[ms]: 0, DOMAIN_WIDEN_APPLICATIONS: 11, DOMAIN_WIDEN_TIME[ms]: 460, DOMAIN_ISSUBSETEQ_APPLICATIONS: 18, DOMAIN_ISSUBSETEQ_TIME[ms]: 54, DOMAIN_ISBOTTOM_APPLICATIONS: 38, DOMAIN_ISBOTTOM_TIME[ms]: 99, LOOP_SUMMARIZER_APPLICATIONS: 7, LOOP_SUMMARIZER_CACHE_MISSES: 7, LOOP_SUMMARIZER_OVERALL_TIME[ms]: 1163, LOOP_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 1163, LOOP_SUMMARIZER_FIXPOINT_ITERATIONS: 18, CALL_SUMMARIZER_APPLICATIONS: 0, CALL_SUMMARIZER_CACHE_MISSES: 0, CALL_SUMMARIZER_OVERALL_TIME[ms]: 0, CALL_SUMMARIZER_NEW_COMPUTATION_TIME[ms]: 0, PROCEDURE_GRAPH_BUILDER_TIME[ms]: 0, PATH_EXPR_TIME[ms]: 1, REGEX_TO_DAG_TIME[ms]: 1, DAG_COMPRESSION_TIME[ms]: 21, DAG_COMPRESSION_PROCESSED_NODES: 519, DAG_COMPRESSION_RETAINED_NODES: 120, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...