./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.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_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/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 279a162aa90145a7316b3266460570a8e3cad8e6 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/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 279a162aa90145a7316b3266460570a8e3cad8e6 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:08:58,869 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:08:58,871 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:08:58,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:08:58,972 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:08:58,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:08:58,977 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:08:58,980 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:08:58,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:08:58,984 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:08:58,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:08:58,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:08:58,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:08:58,990 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:08:58,992 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:08:58,994 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:08:58,996 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:08:58,998 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:08:59,001 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:08:59,004 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:08:59,007 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:08:59,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:08:59,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:08:59,020 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:08:59,026 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:08:59,034 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:08:59,034 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:08:59,036 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:08:59,039 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:08:59,040 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:08:59,041 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:08:59,043 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:08:59,045 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:08:59,047 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:08:59,049 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:08:59,049 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:08:59,050 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:08:59,051 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:08:59,051 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:08:59,052 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:08:59,053 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:08:59,057 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-30 02:08:59,123 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:08:59,123 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:08:59,124 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:08:59,124 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:08:59,125 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:08:59,125 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:08:59,125 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-30 02:08:59,126 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:08:59,126 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:08:59,126 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-30 02:08:59,126 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-30 02:08:59,127 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:08:59,127 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-30 02:08:59,127 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-30 02:08:59,127 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-30 02:08:59,128 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:08:59,129 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:08:59,129 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:08:59,129 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:08:59,130 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:08:59,130 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:08:59,130 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:08:59,130 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:08:59,131 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:08:59,131 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:08:59,131 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:08:59,131 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:08:59,132 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:08:59,132 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:08:59,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:08:59,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:08:59,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:08:59,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:08:59,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:08:59,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:08:59,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:08:59,138 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-30 02:08:59,138 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-30 02:08:59,138 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:08:59,139 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:08:59,139 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_401bf002-a6a8-4b84-97d4-f9e732fc326b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-11-30 02:08:59,476 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:08:59,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:08:59,516 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:08:59,518 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:08:59,519 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:08:59,520 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-30 02:08:59,606 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/3e64dbfa2/ca4e1ef38329432d9651f9e579592230/FLAGac784ddd2 [2020-11-30 02:09:00,308 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:09:00,315 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-30 02:09:00,342 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/3e64dbfa2/ca4e1ef38329432d9651f9e579592230/FLAGac784ddd2 [2020-11-30 02:09:00,541 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/3e64dbfa2/ca4e1ef38329432d9651f9e579592230 [2020-11-30 02:09:00,551 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:09:00,553 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:09:00,555 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:00,555 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:09:00,564 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:09:00,565 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:00" (1/1) ... [2020-11-30 02:09:00,568 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c5b319b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:00, skipping insertion in model container [2020-11-30 02:09:00,568 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:00" (1/1) ... [2020-11-30 02:09:00,578 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:09:00,635 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:09:01,051 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:01,062 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:09:01,106 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:01,168 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:09:01,169 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01 WrapperNode [2020-11-30 02:09:01,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:01,171 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:01,171 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:09:01,171 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:09:01,180 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,197 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,219 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:01,220 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:09:01,221 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:09:01,221 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:09:01,231 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,231 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,235 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,236 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,244 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,248 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,250 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... [2020-11-30 02:09:01,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:09:01,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:09:01,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:09:01,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:09:01,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:09:01,338 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-30 02:09:01,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-30 02:09:01,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 02:09:01,339 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 02:09:01,339 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:09:01,339 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 02:09:01,340 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-30 02:09:01,340 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:09:01,340 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:09:01,998 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:09:01,999 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 02:09:02,001 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:02 BoogieIcfgContainer [2020-11-30 02:09:02,002 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:09:02,004 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:09:02,004 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:09:02,008 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:09:02,009 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:09:00" (1/3) ... [2020-11-30 02:09:02,010 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435bc61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:02, skipping insertion in model container [2020-11-30 02:09:02,010 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:01" (2/3) ... [2020-11-30 02:09:02,011 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@435bc61a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:02, skipping insertion in model container [2020-11-30 02:09:02,011 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:02" (3/3) ... [2020-11-30 02:09:02,013 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-11-30 02:09:02,027 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:09:02,033 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-30 02:09:02,049 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-30 02:09:02,075 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:09:02,075 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:09:02,076 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:09:02,076 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:09:02,076 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:09:02,076 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:09:02,077 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:09:02,077 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:09:02,093 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-11-30 02:09:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-30 02:09:02,101 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,102 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-30 02:09:02,102 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash 3007194, now seen corresponding path program 1 times [2020-11-30 02:09:02,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349849967] [2020-11-30 02:09:02,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:02,272 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349849967] [2020-11-30 02:09:02,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:02,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:09:02,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793978948] [2020-11-30 02:09:02,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-30 02:09:02,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:02,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-30 02:09:02,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:09:02,300 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 2 states. [2020-11-30 02:09:02,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:02,316 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2020-11-30 02:09:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-30 02:09:02,318 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-30 02:09:02,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:02,328 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:09:02,328 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 02:09:02,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-30 02:09:02,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 02:09:02,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 02:09:02,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:09:02,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-30 02:09:02,366 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 4 [2020-11-30 02:09:02,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:02,366 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-30 02:09:02,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-30 02:09:02,367 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-30 02:09:02,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:02,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,367 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:02,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-30 02:09:02,368 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,369 INFO L82 PathProgramCache]: Analyzing trace with hash 92571433, now seen corresponding path program 1 times [2020-11-30 02:09:02,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106309718] [2020-11-30 02:09:02,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:02,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:02,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106309718] [2020-11-30 02:09:02,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:02,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:09:02,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565949869] [2020-11-30 02:09:02,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:02,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:02,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:02,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,473 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-11-30 02:09:02,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:02,529 INFO L93 Difference]: Finished difference Result 33 states and 35 transitions. [2020-11-30 02:09:02,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:02,530 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:02,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:02,531 INFO L225 Difference]: With dead ends: 33 [2020-11-30 02:09:02,531 INFO L226 Difference]: Without dead ends: 33 [2020-11-30 02:09:02,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-30 02:09:02,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 26. [2020-11-30 02:09:02,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:09:02,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 02:09:02,539 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 5 [2020-11-30 02:09:02,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:02,540 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 02:09:02,540 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:02,540 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 02:09:02,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:02,541 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:02,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-30 02:09:02,542 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,543 INFO L82 PathProgramCache]: Analyzing trace with hash 92572606, now seen corresponding path program 1 times [2020-11-30 02:09:02,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188285011] [2020-11-30 02:09:02,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:02,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:02,586 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188285011] [2020-11-30 02:09:02,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:02,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-11-30 02:09:02,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509128070] [2020-11-30 02:09:02,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:02,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:02,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,589 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 3 states. [2020-11-30 02:09:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:02,644 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-30 02:09:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:02,645 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:02,646 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:09:02,646 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:09:02,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:09:02,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 02:09:02,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:09:02,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-30 02:09:02,651 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2020-11-30 02:09:02,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:02,651 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-30 02:09:02,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:02,652 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-30 02:09:02,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:02,652 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,652 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:02,652 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-30 02:09:02,653 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,654 INFO L82 PathProgramCache]: Analyzing trace with hash 92572748, now seen corresponding path program 1 times [2020-11-30 02:09:02,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,654 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093696049] [2020-11-30 02:09:02,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:02,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:02,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093696049] [2020-11-30 02:09:02,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:02,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:09:02,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687738838] [2020-11-30 02:09:02,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:02,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:02,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:02,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,711 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 3 states. [2020-11-30 02:09:02,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:02,780 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-30 02:09:02,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:02,781 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:02,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:02,782 INFO L225 Difference]: With dead ends: 23 [2020-11-30 02:09:02,782 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 02:09:02,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 02:09:02,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 02:09:02,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:09:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-30 02:09:02,786 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2020-11-30 02:09:02,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:02,787 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-30 02:09:02,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:02,787 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-30 02:09:02,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:02,788 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:02,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-30 02:09:02,788 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash 92572749, now seen corresponding path program 1 times [2020-11-30 02:09:02,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337738781] [2020-11-30 02:09:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:02,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:02,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337738781] [2020-11-30 02:09:02,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:02,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-30 02:09:02,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038315412] [2020-11-30 02:09:02,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:02,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:02,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:02,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,888 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 3 states. [2020-11-30 02:09:02,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:02,966 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2020-11-30 02:09:02,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:02,967 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:02,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:02,968 INFO L225 Difference]: With dead ends: 21 [2020-11-30 02:09:02,968 INFO L226 Difference]: Without dead ends: 21 [2020-11-30 02:09:02,969 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:02,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-11-30 02:09:02,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-11-30 02:09:02,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-11-30 02:09:02,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2020-11-30 02:09:02,973 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2020-11-30 02:09:02,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:02,973 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2020-11-30 02:09:02,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:02,973 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2020-11-30 02:09:02,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:02,974 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:02,974 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:02,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-30 02:09:02,975 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:02,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:02,976 INFO L82 PathProgramCache]: Analyzing trace with hash 929587106, now seen corresponding path program 1 times [2020-11-30 02:09:02,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:02,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559980180] [2020-11-30 02:09:02,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:03,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559980180] [2020-11-30 02:09:03,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:03,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:09:03,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737164333] [2020-11-30 02:09:03,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:03,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:03,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:03,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:03,081 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand 4 states. [2020-11-30 02:09:03,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:03,227 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2020-11-30 02:09:03,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:03,228 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:09:03,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:03,229 INFO L225 Difference]: With dead ends: 28 [2020-11-30 02:09:03,229 INFO L226 Difference]: Without dead ends: 28 [2020-11-30 02:09:03,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:03,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-11-30 02:09:03,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2020-11-30 02:09:03,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-11-30 02:09:03,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2020-11-30 02:09:03,233 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 10 [2020-11-30 02:09:03,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:03,234 INFO L481 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2020-11-30 02:09:03,234 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:03,234 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2020-11-30 02:09:03,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:03,234 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:03,235 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:03,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-30 02:09:03,235 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:03,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:03,236 INFO L82 PathProgramCache]: Analyzing trace with hash 929587107, now seen corresponding path program 1 times [2020-11-30 02:09:03,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:03,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594708151] [2020-11-30 02:09:03,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:03,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:03,384 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:03,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594708151] [2020-11-30 02:09:03,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:03,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-30 02:09:03,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166895590] [2020-11-30 02:09:03,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:03,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:03,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:03,387 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand 4 states. [2020-11-30 02:09:03,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:03,518 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2020-11-30 02:09:03,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:03,519 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:09:03,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:03,520 INFO L225 Difference]: With dead ends: 32 [2020-11-30 02:09:03,520 INFO L226 Difference]: Without dead ends: 32 [2020-11-30 02:09:03,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:03,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-11-30 02:09:03,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 24. [2020-11-30 02:09:03,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:09:03,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-11-30 02:09:03,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 10 [2020-11-30 02:09:03,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:03,529 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-11-30 02:09:03,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:03,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-11-30 02:09:03,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:03,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:03,530 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:03,531 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-30 02:09:03,531 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:03,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:03,532 INFO L82 PathProgramCache]: Analyzing trace with hash 929588279, now seen corresponding path program 1 times [2020-11-30 02:09:03,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:03,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930351658] [2020-11-30 02:09:03,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:03,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:03,636 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:03,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930351658] [2020-11-30 02:09:03,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:03,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-30 02:09:03,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684299230] [2020-11-30 02:09:03,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:03,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:03,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:03,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:03,639 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-11-30 02:09:03,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:03,753 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-30 02:09:03,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:03,754 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:09:03,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:03,755 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:09:03,755 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:09:03,756 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:03,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:09:03,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 24. [2020-11-30 02:09:03,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:09:03,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 02:09:03,760 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-11-30 02:09:03,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:03,760 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 02:09:03,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:03,760 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 02:09:03,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-30 02:09:03,761 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:03,761 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:03,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-30 02:09:03,762 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:03,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:03,762 INFO L82 PathProgramCache]: Analyzing trace with hash -619607799, now seen corresponding path program 1 times [2020-11-30 02:09:03,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:03,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927492108] [2020-11-30 02:09:03,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:03,902 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927492108] [2020-11-30 02:09:03,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:03,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-30 02:09:03,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489188325] [2020-11-30 02:09:03,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:09:03,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:03,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:09:03,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:03,905 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 5 states. [2020-11-30 02:09:04,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:04,036 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2020-11-30 02:09:04,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:09:04,038 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-11-30 02:09:04,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:04,039 INFO L225 Difference]: With dead ends: 27 [2020-11-30 02:09:04,039 INFO L226 Difference]: Without dead ends: 27 [2020-11-30 02:09:04,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:09:04,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-11-30 02:09:04,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2020-11-30 02:09:04,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:09:04,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 02:09:04,043 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 13 [2020-11-30 02:09:04,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:04,043 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 02:09:04,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:09:04,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 02:09:04,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:09:04,048 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:04,048 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:04,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-30 02:09:04,049 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:04,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:04,050 INFO L82 PathProgramCache]: Analyzing trace with hash -2028460207, now seen corresponding path program 1 times [2020-11-30 02:09:04,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:04,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322400161] [2020-11-30 02:09:04,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:04,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:04,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322400161] [2020-11-30 02:09:04,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105196850] [2020-11-30 02:09:04,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-30 02:09:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:04,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-30 02:09:04,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:04,552 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 02:09:04,553 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,569 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,576 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 02:09:04,576 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,594 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,594 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,594 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:26, output treesize:18 [2020-11-30 02:09:04,705 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-11-30 02:09:04,706 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,718 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,724 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-11-30 02:09:04,724 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,731 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,732 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,732 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-11-30 02:09:04,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:04,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:04,830 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:09:04,865 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 12 [2020-11-30 02:09:04,896 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 24 [2020-11-30 02:09:04,900 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 2 xjuncts. [2020-11-30 02:09:04,908 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,908 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2020-11-30 02:09:04,943 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,954 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 14 treesize of output 12 [2020-11-30 02:09:04,962 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:09:04,966 INFO L190 IndexEqualityManager]: detected not equals via solver [2020-11-30 02:09:04,967 INFO L545 ElimStorePlain]: Start of recursive call 5: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,970 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,970 INFO L545 ElimStorePlain]: Start of recursive call 4: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:04,998 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:04,999 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 3 conjuncts [2020-11-30 02:09:05,004 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 3 xjuncts. [2020-11-30 02:09:05,005 INFO L244 ElimStorePlain]: Needed 5 recursive calls to eliminate 4 variables, input treesize:45, output treesize:22 [2020-11-30 02:09:05,081 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-30 02:09:05,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:05,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1737969237] [2020-11-30 02:09:05,116 INFO L159 IcfgInterpreter]: Started Sifa with 11 locations of interest [2020-11-30 02:09:05,117 INFO L166 IcfgInterpreter]: Building call graph [2020-11-30 02:09:05,122 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2020-11-30 02:09:05,129 INFO L176 IcfgInterpreter]: Starting interpretation [2020-11-30 02:09:05,129 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2020-11-30 02:09:05,427 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:05,446 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:05,477 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:06,376 WARN L193 SmtUtils]: Spent 582.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 84 [2020-11-30 02:09:06,703 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 62 [2020-11-30 02:09:06,880 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:06,898 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:06,914 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:06,932 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:06,949 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:07,010 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:07,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:08,173 WARN L234 Elim1Store]: Array PQE input equivalent to false [2020-11-30 02:09:08,359 INFO L180 IcfgInterpreter]: Interpretation finished [2020-11-30 02:09:08,917 WARN L193 SmtUtils]: Spent 477.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 80 [2020-11-30 02:09:09,054 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 27 [2020-11-30 02:09:09,238 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2020-11-30 02:09:09,518 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2020-11-30 02:09:09,599 WARN L332 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2020-11-30 02:09:09,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2020-11-30 02:09:09,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 9 [2020-11-30 02:09:09,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900059248] [2020-11-30 02:09:09,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-30 02:09:09,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-30 02:09:09,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-30 02:09:09,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:09:09,605 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 10 states. [2020-11-30 02:09:09,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:09,705 INFO L93 Difference]: Finished difference Result 36 states and 38 transitions. [2020-11-30 02:09:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:09:09,705 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-30 02:09:09,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:09,706 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:09:09,706 INFO L226 Difference]: Without dead ends: 36 [2020-11-30 02:09:09,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2020-11-30 02:09:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-11-30 02:09:09,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-11-30 02:09:09,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-11-30 02:09:09,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2020-11-30 02:09:09,711 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 14 [2020-11-30 02:09:09,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:09,712 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2020-11-30 02:09:09,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-30 02:09:09,712 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2020-11-30 02:09:09,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:09:09,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:09,720 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:09,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-30 02:09:09,933 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2028459034, now seen corresponding path program 1 times [2020-11-30 02:09:09,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-30 02:09:09,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916549805] [2020-11-30 02:09:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-30 02:09:09,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:09:09,952 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:09:09,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:09:09,965 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:09:09,997 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-30 02:09:10,001 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:09:10,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2020-11-30 02:09:10,043 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:09:10 BoogieIcfgContainer [2020-11-30 02:09:10,043 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:09:10,044 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:09:10,044 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:09:10,044 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:09:10,045 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:02" (3/4) ... [2020-11-30 02:09:10,048 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:09:10,048 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:09:10,049 INFO L168 Benchmark]: Toolchain (without parser) took 9496.66 ms. Allocated memory was 96.5 MB in the beginning and 176.2 MB in the end (delta: 79.7 MB). Free memory was 67.5 MB in the beginning and 120.7 MB in the end (delta: -53.2 MB). Peak memory consumption was 26.6 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,050 INFO L168 Benchmark]: CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 52.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:09:10,050 INFO L168 Benchmark]: CACSL2BoogieTranslator took 614.81 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 62.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,051 INFO L168 Benchmark]: Boogie Procedure Inliner took 49.16 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 60.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:09:10,051 INFO L168 Benchmark]: Boogie Preprocessor took 33.42 ms. Allocated memory is still 96.5 MB. Free memory was 60.8 MB in the beginning and 59.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,052 INFO L168 Benchmark]: RCFGBuilder took 747.04 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 59.2 MB in the beginning and 99.3 MB in the end (delta: -40.1 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,052 INFO L168 Benchmark]: TraceAbstraction took 8039.69 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 99.3 MB in the beginning and 121.8 MB in the end (delta: -22.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,053 INFO L168 Benchmark]: Witness Printer took 4.45 ms. Allocated memory is still 176.2 MB. Free memory was 121.8 MB in the beginning and 120.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:10,055 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35 ms. Allocated memory is still 96.5 MB. Free memory is still 52.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 614.81 ms. Allocated memory is still 96.5 MB. Free memory was 67.2 MB in the beginning and 62.3 MB in the end (delta: 5.0 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 49.16 ms. Allocated memory is still 96.5 MB. Free memory was 62.3 MB in the beginning and 60.8 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.42 ms. Allocated memory is still 96.5 MB. Free memory was 60.8 MB in the beginning and 59.2 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 747.04 ms. Allocated memory was 96.5 MB in the beginning and 121.6 MB in the end (delta: 25.2 MB). Free memory was 59.2 MB in the beginning and 99.3 MB in the end (delta: -40.1 MB). Peak memory consumption was 24.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 8039.69 ms. Allocated memory was 121.6 MB in the beginning and 176.2 MB in the end (delta: 54.5 MB). Free memory was 99.3 MB in the beginning and 121.8 MB in the end (delta: -22.4 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.45 ms. Allocated memory is still 176.2 MB. Free memory was 121.8 MB in the beginning and 120.7 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 26 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 7.9s, OverallIterations: 11, TraceHistogramMax: 2, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 166 SDtfs, 173 SDslu, 101 SDs, 0 SdLazy, 195 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 78 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 1.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=34occurred in iteration=10, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 10 MinimizatonAttempts, 32 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.4s InterpolantComputationTime, 109 NumberOfCodeBlocks, 109 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 97 ConstructedInterpolants, 0 QuantifiedInterpolants, 9144 SizeOfPredicates, 10 NumberOfNonLiveVariables, 87 ConjunctsInSsa, 18 ConjunctsInUnsatCore, 12 InterpolantComputations, 9 PerfectInterpolantSequences, 11/20 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-a4ecdab [2020-11-30 02:09:13,056 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-30 02:09:13,060 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-30 02:09:13,120 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-30 02:09:13,121 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-30 02:09:13,127 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-30 02:09:13,131 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-30 02:09:13,136 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-30 02:09:13,141 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-30 02:09:13,148 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-30 02:09:13,150 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-30 02:09:13,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-30 02:09:13,157 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-30 02:09:13,164 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-30 02:09:13,166 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-30 02:09:13,169 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-30 02:09:13,170 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-30 02:09:13,175 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-30 02:09:13,180 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-30 02:09:13,190 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-30 02:09:13,193 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-30 02:09:13,194 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-30 02:09:13,204 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-30 02:09:13,207 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-30 02:09:13,212 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-30 02:09:13,216 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-30 02:09:13,217 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-30 02:09:13,218 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-30 02:09:13,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-30 02:09:13,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-30 02:09:13,223 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-30 02:09:13,224 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-30 02:09:13,227 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-30 02:09:13,228 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-30 02:09:13,229 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-30 02:09:13,230 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-30 02:09:13,231 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-30 02:09:13,231 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-30 02:09:13,231 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-30 02:09:13,234 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-30 02:09:13,235 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-30 02:09:13,236 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-30 02:09:13,284 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-30 02:09:13,284 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-30 02:09:13,285 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-30 02:09:13,286 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-30 02:09:13,286 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-30 02:09:13,286 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-30 02:09:13,286 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-30 02:09:13,287 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-30 02:09:13,287 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-30 02:09:13,288 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-30 02:09:13,288 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-30 02:09:13,288 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-30 02:09:13,289 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-30 02:09:13,289 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-30 02:09:13,289 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-30 02:09:13,289 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-30 02:09:13,290 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-30 02:09:13,290 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-30 02:09:13,290 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-30 02:09:13,290 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-30 02:09:13,291 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-30 02:09:13,291 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-30 02:09:13,291 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-30 02:09:13,291 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-30 02:09:13,292 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-30 02:09:13,292 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-30 02:09:13,292 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-30 02:09:13,292 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-30 02:09:13,300 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-30 02:09:13,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-30 02:09:13,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:09:13,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-30 02:09:13,302 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-30 02:09:13,302 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-30 02:09:13,302 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-30 02:09:13,303 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-30 02:09:13,303 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-30 02:09:13,303 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 279a162aa90145a7316b3266460570a8e3cad8e6 [2020-11-30 02:09:13,807 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-30 02:09:13,858 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-30 02:09:13,862 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-30 02:09:13,863 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-30 02:09:13,867 INFO L275 PluginConnector]: CDTParser initialized [2020-11-30 02:09:13,868 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-30 02:09:13,963 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/f09e17d1b/ee57dbba565f4dde9a2ea4e8e8e7d429/FLAG5eb00293a [2020-11-30 02:09:14,673 INFO L306 CDTParser]: Found 1 translation units. [2020-11-30 02:09:14,676 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/sv-benchmarks/c/list-properties/simple_built_from_end.i [2020-11-30 02:09:14,702 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/f09e17d1b/ee57dbba565f4dde9a2ea4e8e8e7d429/FLAG5eb00293a [2020-11-30 02:09:14,919 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/data/f09e17d1b/ee57dbba565f4dde9a2ea4e8e8e7d429 [2020-11-30 02:09:14,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-30 02:09:14,925 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-30 02:09:14,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:14,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-30 02:09:14,935 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-30 02:09:14,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:14" (1/1) ... [2020-11-30 02:09:14,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@e8f740 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:14, skipping insertion in model container [2020-11-30 02:09:14,944 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 30.11 02:09:14" (1/1) ... [2020-11-30 02:09:14,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-30 02:09:15,018 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-30 02:09:15,589 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:15,615 INFO L203 MainTranslator]: Completed pre-run [2020-11-30 02:09:15,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-30 02:09:15,802 INFO L208 MainTranslator]: Completed translation [2020-11-30 02:09:15,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15 WrapperNode [2020-11-30 02:09:15,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-30 02:09:15,804 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:15,804 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-30 02:09:15,804 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-30 02:09:15,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,834 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,858 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-30 02:09:15,860 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-30 02:09:15,860 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-30 02:09:15,860 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-30 02:09:15,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,878 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,878 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,889 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,897 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... [2020-11-30 02:09:15,901 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-30 02:09:15,902 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-30 02:09:15,903 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-30 02:09:15,903 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-30 02:09:15,904 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-30 02:09:15,993 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-30 02:09:15,994 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-30 02:09:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-30 02:09:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-30 02:09:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-30 02:09:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-30 02:09:15,995 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-30 02:09:15,996 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-30 02:09:15,996 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-30 02:09:16,656 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-30 02:09:16,657 INFO L298 CfgBuilder]: Removed 10 assume(true) statements. [2020-11-30 02:09:16,659 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:16 BoogieIcfgContainer [2020-11-30 02:09:16,659 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-30 02:09:16,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-30 02:09:16,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-30 02:09:16,666 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-30 02:09:16,666 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 30.11 02:09:14" (1/3) ... [2020-11-30 02:09:16,667 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ae2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:16, skipping insertion in model container [2020-11-30 02:09:16,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 30.11 02:09:15" (2/3) ... [2020-11-30 02:09:16,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8ae2b1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 30.11 02:09:16, skipping insertion in model container [2020-11-30 02:09:16,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:16" (3/3) ... [2020-11-30 02:09:16,670 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2020-11-30 02:09:16,687 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-30 02:09:16,692 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 10 error locations. [2020-11-30 02:09:16,709 INFO L253 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2020-11-30 02:09:16,748 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-30 02:09:16,748 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-30 02:09:16,748 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-30 02:09:16,748 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-30 02:09:16,749 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-30 02:09:16,749 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-30 02:09:16,749 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-30 02:09:16,749 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-30 02:09:16,768 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states. [2020-11-30 02:09:16,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:16,777 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:16,777 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:16,778 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:16,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:16,786 INFO L82 PathProgramCache]: Analyzing trace with hash 28698500, now seen corresponding path program 1 times [2020-11-30 02:09:16,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:16,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1812688834] [2020-11-30 02:09:16,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:16,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:16,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2020-11-30 02:09:16,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:16,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:16,971 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:16,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:16,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1812688834] [2020-11-30 02:09:16,975 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:16,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:09:16,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408198035] [2020-11-30 02:09:16,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:16,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:17,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:17,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:17,012 INFO L87 Difference]: Start difference. First operand 30 states. Second operand 3 states. [2020-11-30 02:09:17,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:17,117 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2020-11-30 02:09:17,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:17,120 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:17,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:17,130 INFO L225 Difference]: With dead ends: 44 [2020-11-30 02:09:17,131 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 02:09:17,132 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:17,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 02:09:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2020-11-30 02:09:17,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-11-30 02:09:17,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2020-11-30 02:09:17,172 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 5 [2020-11-30 02:09:17,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:17,172 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2020-11-30 02:09:17,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:17,173 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2020-11-30 02:09:17,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:17,174 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:17,174 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:17,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-30 02:09:17,388 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:17,389 INFO L82 PathProgramCache]: Analyzing trace with hash 28698536, now seen corresponding path program 1 times [2020-11-30 02:09:17,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:17,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1839782110] [2020-11-30 02:09:17,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:17,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:17,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:09:17,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:17,498 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:17,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:17,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1839782110] [2020-11-30 02:09:17,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:17,504 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:09:17,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317543924] [2020-11-30 02:09:17,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:17,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:17,508 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand 3 states. [2020-11-30 02:09:17,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:17,578 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2020-11-30 02:09:17,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:17,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:17,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:17,582 INFO L225 Difference]: With dead ends: 36 [2020-11-30 02:09:17,582 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:09:17,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:17,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:09:17,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 27. [2020-11-30 02:09:17,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-11-30 02:09:17,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-11-30 02:09:17,588 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 5 [2020-11-30 02:09:17,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:17,590 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-11-30 02:09:17,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:17,591 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-11-30 02:09:17,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:17,593 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:17,593 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:17,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-30 02:09:17,794 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:17,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:17,795 INFO L82 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2020-11-30 02:09:17,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:17,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1786254507] [2020-11-30 02:09:17,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:17,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:17,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 3 conjunts are in the unsatisfiable core [2020-11-30 02:09:17,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:17,960 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:09:17,961 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:17,966 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:17,966 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:17,967 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-30 02:09:17,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:17,984 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:18,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:18,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1786254507] [2020-11-30 02:09:18,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:18,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2020-11-30 02:09:18,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964018442] [2020-11-30 02:09:18,011 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-11-30 02:09:18,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:18,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-11-30 02:09:18,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:18,013 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 3 states. [2020-11-30 02:09:18,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:18,089 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2020-11-30 02:09:18,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:18,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-11-30 02:09:18,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:18,091 INFO L225 Difference]: With dead ends: 25 [2020-11-30 02:09:18,091 INFO L226 Difference]: Without dead ends: 25 [2020-11-30 02:09:18,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-11-30 02:09:18,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-11-30 02:09:18,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-11-30 02:09:18,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-11-30 02:09:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2020-11-30 02:09:18,096 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2020-11-30 02:09:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:18,097 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2020-11-30 02:09:18,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-11-30 02:09:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2020-11-30 02:09:18,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-30 02:09:18,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:18,098 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-30 02:09:18,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-30 02:09:18,312 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:18,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:18,312 INFO L82 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2020-11-30 02:09:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:18,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [153009619] [2020-11-30 02:09:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:18,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:18,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 5 conjunts are in the unsatisfiable core [2020-11-30 02:09:18,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:18,413 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:09:18,414 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:18,423 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:18,424 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:18,424 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 02:09:18,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:18,439 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:18,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:18,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [153009619] [2020-11-30 02:09:18,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:18,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2020-11-30 02:09:18,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245706077] [2020-11-30 02:09:18,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:18,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:18,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:18,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:18,528 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand 4 states. [2020-11-30 02:09:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:18,626 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2020-11-30 02:09:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-11-30 02:09:18,627 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-30 02:09:18,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:18,628 INFO L225 Difference]: With dead ends: 23 [2020-11-30 02:09:18,628 INFO L226 Difference]: Without dead ends: 23 [2020-11-30 02:09:18,629 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-11-30 02:09:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-11-30 02:09:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-11-30 02:09:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-11-30 02:09:18,634 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2020-11-30 02:09:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:18,634 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-11-30 02:09:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-11-30 02:09:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:18,636 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:18,636 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:18,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-30 02:09:18,851 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:18,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:18,852 INFO L82 PathProgramCache]: Analyzing trace with hash -653129222, now seen corresponding path program 1 times [2020-11-30 02:09:18,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:18,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [700580197] [2020-11-30 02:09:18,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:18,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:18,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:09:18,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:18,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:18,959 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:18,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:18,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [700580197] [2020-11-30 02:09:18,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:18,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-30 02:09:18,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069536750] [2020-11-30 02:09:18,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:18,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:18,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:18,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:18,972 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 4 states. [2020-11-30 02:09:19,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:19,121 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2020-11-30 02:09:19,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:19,122 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:09:19,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:19,123 INFO L225 Difference]: With dead ends: 40 [2020-11-30 02:09:19,123 INFO L226 Difference]: Without dead ends: 40 [2020-11-30 02:09:19,124 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:19,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-30 02:09:19,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 24. [2020-11-30 02:09:19,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:09:19,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-11-30 02:09:19,130 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 10 [2020-11-30 02:09:19,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:19,130 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-11-30 02:09:19,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:19,130 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-11-30 02:09:19,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:19,131 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:19,131 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:19,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-30 02:09:19,332 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:19,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:19,333 INFO L82 PathProgramCache]: Analyzing trace with hash -653129186, now seen corresponding path program 1 times [2020-11-30 02:09:19,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:19,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1368113342] [2020-11-30 02:09:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:19,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-30 02:09:19,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:19,431 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:09:19,432 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:19,435 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:19,435 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:19,435 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-30 02:09:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:19,455 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:19,465 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:19,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1368113342] [2020-11-30 02:09:19,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:19,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-30 02:09:19,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099759434] [2020-11-30 02:09:19,467 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-30 02:09:19,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:19,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-30 02:09:19,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-30 02:09:19,468 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 4 states. [2020-11-30 02:09:19,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:19,645 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2020-11-30 02:09:19,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-30 02:09:19,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-11-30 02:09:19,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:19,648 INFO L225 Difference]: With dead ends: 29 [2020-11-30 02:09:19,648 INFO L226 Difference]: Without dead ends: 29 [2020-11-30 02:09:19,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:19,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-11-30 02:09:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2020-11-30 02:09:19,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-11-30 02:09:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2020-11-30 02:09:19,653 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2020-11-30 02:09:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:19,653 INFO L481 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2020-11-30 02:09:19,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-30 02:09:19,654 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2020-11-30 02:09:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-30 02:09:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:19,655 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:19,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-30 02:09:19,869 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:19,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:19,869 INFO L82 PathProgramCache]: Analyzing trace with hash -653129185, now seen corresponding path program 1 times [2020-11-30 02:09:19,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:19,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2002822798] [2020-11-30 02:09:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:19,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:19,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-30 02:09:19,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:19,985 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2020-11-30 02:09:19,985 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:19,995 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:19,996 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:19,996 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-30 02:09:20,032 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:20,033 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:20,160 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:20,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2002822798] [2020-11-30 02:09:20,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:20,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-30 02:09:20,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843763589] [2020-11-30 02:09:20,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-30 02:09:20,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:20,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-30 02:09:20,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-30 02:09:20,163 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 6 states. [2020-11-30 02:09:20,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:20,419 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2020-11-30 02:09:20,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-30 02:09:20,421 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-11-30 02:09:20,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:20,422 INFO L225 Difference]: With dead ends: 35 [2020-11-30 02:09:20,422 INFO L226 Difference]: Without dead ends: 35 [2020-11-30 02:09:20,423 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-30 02:09:20,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-11-30 02:09:20,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 26. [2020-11-30 02:09:20,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:09:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2020-11-30 02:09:20,427 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 10 [2020-11-30 02:09:20,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:20,427 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2020-11-30 02:09:20,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-30 02:09:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2020-11-30 02:09:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-30 02:09:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:20,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:20,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-11-30 02:09:20,633 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:20,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:20,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1901496704, now seen corresponding path program 1 times [2020-11-30 02:09:20,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:20,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1730293228] [2020-11-30 02:09:20,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:20,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-30 02:09:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-30 02:09:20,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-30 02:09:20,753 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-11-30 02:09:20,754 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,758 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:20,758 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,759 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-11-30 02:09:20,796 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-30 02:09:20,797 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2020-11-30 02:09:20,797 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,800 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:20,801 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,801 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-11-30 02:09:20,845 INFO L384 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 15 treesize of output 7 [2020-11-30 02:09:20,845 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,848 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:20,849 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-30 02:09:20,849 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-30 02:09:20,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:20,875 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-30 02:09:20,889 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:09:20,899 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-30 02:09:20,900 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-30 02:09:20,901 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2020-11-30 02:09:20,912 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-30 02:09:20,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1730293228] [2020-11-30 02:09:20,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-30 02:09:20,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-30 02:09:20,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594498367] [2020-11-30 02:09:20,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-30 02:09:20,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-30 02:09:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-30 02:09:20,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-30 02:09:20,915 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand 5 states. [2020-11-30 02:09:21,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-30 02:09:21,195 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2020-11-30 02:09:21,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-30 02:09:21,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-11-30 02:09:21,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-30 02:09:21,198 INFO L225 Difference]: With dead ends: 30 [2020-11-30 02:09:21,198 INFO L226 Difference]: Without dead ends: 30 [2020-11-30 02:09:21,198 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-30 02:09:21,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-11-30 02:09:21,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2020-11-30 02:09:21,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2020-11-30 02:09:21,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2020-11-30 02:09:21,202 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 14 [2020-11-30 02:09:21,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-30 02:09:21,202 INFO L481 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2020-11-30 02:09:21,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-30 02:09:21,202 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2020-11-30 02:09:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-30 02:09:21,203 INFO L414 BasicCegarLoop]: Found error trace [2020-11-30 02:09:21,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-30 02:09:21,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-11-30 02:09:21,414 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION]=== [2020-11-30 02:09:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-30 02:09:21,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1195547515, now seen corresponding path program 1 times [2020-11-30 02:09:21,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-30 02:09:21,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [442468399] [2020-11-30 02:09:21,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_401bf002-a6a8-4b84-97d4-f9e732fc326b/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-11-30 02:09:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:09:21,548 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:09:21,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-30 02:09:21,602 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-30 02:09:21,651 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-30 02:09:21,652 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-30 02:09:21,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-11-30 02:09:21,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 30.11 02:09:21 BoogieIcfgContainer [2020-11-30 02:09:21,898 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-30 02:09:21,898 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-30 02:09:21,899 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-30 02:09:21,899 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-30 02:09:21,899 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 30.11 02:09:16" (3/4) ... [2020-11-30 02:09:21,903 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-30 02:09:21,903 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-30 02:09:21,905 INFO L168 Benchmark]: Toolchain (without parser) took 6979.04 ms. Allocated memory was 54.5 MB in the beginning and 94.4 MB in the end (delta: 39.8 MB). Free memory was 30.7 MB in the beginning and 61.9 MB in the end (delta: -31.2 MB). Peak memory consumption was 9.3 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,906 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory is still 36.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:09:21,906 INFO L168 Benchmark]: CACSL2BoogieTranslator took 872.97 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 30.5 MB in the beginning and 46.1 MB in the end (delta: -15.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.15 ms. Allocated memory is still 75.5 MB. Free memory was 45.9 MB in the beginning and 44.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,908 INFO L168 Benchmark]: Boogie Preprocessor took 41.95 ms. Allocated memory is still 75.5 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,908 INFO L168 Benchmark]: RCFGBuilder took 756.53 ms. Allocated memory is still 75.5 MB. Free memory was 42.6 MB in the beginning and 41.7 MB in the end (delta: 844.1 kB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,909 INFO L168 Benchmark]: TraceAbstraction took 5235.62 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 41.3 MB in the beginning and 62.7 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-30 02:09:21,910 INFO L168 Benchmark]: Witness Printer took 5.03 ms. Allocated memory is still 94.4 MB. Free memory was 62.7 MB in the beginning and 61.9 MB in the end (delta: 792.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-30 02:09:21,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 54.5 MB. Free memory is still 36.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 872.97 ms. Allocated memory was 54.5 MB in the beginning and 75.5 MB in the end (delta: 21.0 MB). Free memory was 30.5 MB in the beginning and 46.1 MB in the end (delta: -15.5 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.15 ms. Allocated memory is still 75.5 MB. Free memory was 45.9 MB in the beginning and 44.2 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 41.95 ms. Allocated memory is still 75.5 MB. Free memory was 44.2 MB in the beginning and 42.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 756.53 ms. Allocated memory is still 75.5 MB. Free memory was 42.6 MB in the beginning and 41.7 MB in the end (delta: 844.1 kB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5235.62 ms. Allocated memory was 75.5 MB in the beginning and 94.4 MB in the end (delta: 18.9 MB). Free memory was 41.3 MB in the beginning and 62.7 MB in the end (delta: -21.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.03 ms. Allocated memory is still 94.4 MB. Free memory was 62.7 MB in the beginning and 61.9 MB in the end (delta: 792.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 30 locations, 10 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 5.1s, OverallIterations: 9, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 135 SDtfs, 236 SDslu, 70 SDs, 0 SdLazy, 181 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 118 GetRequests, 95 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=32occurred in iteration=1, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 50 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.8s InterpolantComputationTime, 79 NumberOfCodeBlocks, 79 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 112 ConstructedInterpolants, 0 QuantifiedInterpolants, 4556 SizeOfPredicates, 22 NumberOfNonLiveVariables, 322 ConjunctsInSsa, 34 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request...