./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version a4ecdabc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 ......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 .............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-a4ecdab [2020-11-28 07:37:52,509 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:37:52,513 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:37:52,619 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:37:52,625 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:37:52,632 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:37:52,634 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:37:52,639 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:37:52,644 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:37:52,650 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:37:52,651 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:37:52,655 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:37:52,656 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:37:52,659 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:37:52,661 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:37:52,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:37:52,666 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:37:52,667 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:37:52,673 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:37:52,676 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:37:52,678 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:37:52,681 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:37:52,684 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:37:52,685 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:37:52,693 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:37:52,695 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:37:52,695 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:37:52,698 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:37:52,699 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:37:52,700 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:37:52,701 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:37:52,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:37:52,705 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:37:52,706 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:37:52,708 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:37:52,708 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:37:52,709 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:37:52,709 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:37:52,710 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:37:52,711 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:37:52,713 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:37:52,716 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-11-28 07:37:52,762 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:37:52,763 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:37:52,765 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:37:52,765 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:37:52,766 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:37:52,766 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:37:52,766 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-11-28 07:37:52,766 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:37:52,767 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:37:52,767 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-11-28 07:37:52,768 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-11-28 07:37:52,769 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:37:52,769 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-11-28 07:37:52,769 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-11-28 07:37:52,770 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-11-28 07:37:52,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:37:52,771 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:37:52,771 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:37:52,771 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:37:52,772 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:37:52,772 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:37:52,772 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:37:52,772 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:37:52,773 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:37:52,773 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:37:52,773 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:37:52,775 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:37:52,776 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:37:52,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:37:52,776 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:37:52,776 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:37:52,777 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:37:52,777 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:37:52,777 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:37:52,778 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:37:52,778 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:37:52,778 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-11-28 07:37:52,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-28 07:37:52,779 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:37:52,779 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:37:52,779 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_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2020-11-28 07:37:53,180 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:37:53,222 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:37:53,225 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:37:53,243 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:37:53,244 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:37:53,245 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-2.i [2020-11-28 07:37:53,333 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/ddef22432/1b2f37d139c24877a090f1aef4f6daa3/FLAGccfb1a71a [2020-11-28 07:37:54,098 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:37:54,103 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/sv-benchmarks/c/list-properties/simple-2.i [2020-11-28 07:37:54,130 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/ddef22432/1b2f37d139c24877a090f1aef4f6daa3/FLAGccfb1a71a [2020-11-28 07:37:54,314 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/ddef22432/1b2f37d139c24877a090f1aef4f6daa3 [2020-11-28 07:37:54,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:37:54,318 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:37:54,322 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:54,323 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:37:54,327 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:37:54,328 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:54,331 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2007456b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54, skipping insertion in model container [2020-11-28 07:37:54,331 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:54,341 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:37:54,421 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:37:54,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:54,848 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:37:54,894 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:37:54,958 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:37:54,959 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54 WrapperNode [2020-11-28 07:37:54,959 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:37:54,960 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:54,961 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:37:54,961 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:37:54,970 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:54,987 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,010 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:37:55,011 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:37:55,011 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:37:55,012 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:37:55,021 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,022 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,026 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,027 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,035 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,040 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,042 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... [2020-11-28 07:37:55,046 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:37:55,047 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:37:55,047 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:37:55,047 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:37:55,049 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:37:55,138 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-28 07:37:55,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-28 07:37:55,139 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:37:55,139 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:37:55,140 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:37:55,140 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:37:55,140 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-28 07:37:55,140 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:37:55,142 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:37:55,965 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:37:55,965 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:37:55,967 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:55 BoogieIcfgContainer [2020-11-28 07:37:55,968 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:37:55,970 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:37:55,970 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:37:55,974 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:37:55,974 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:37:54" (1/3) ... [2020-11-28 07:37:55,975 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580f5e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:55, skipping insertion in model container [2020-11-28 07:37:55,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:37:54" (2/3) ... [2020-11-28 07:37:55,976 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@580f5e82 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:37:55, skipping insertion in model container [2020-11-28 07:37:55,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:55" (3/3) ... [2020-11-28 07:37:55,978 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-11-28 07:37:56,004 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:37:56,010 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-11-28 07:37:56,025 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-11-28 07:37:56,051 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:37:56,051 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:37:56,051 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:37:56,052 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:37:56,052 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:37:56,052 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:37:56,052 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:37:56,053 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:37:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-11-28 07:37:56,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-11-28 07:37:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:56,078 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-11-28 07:37:56,078 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:56,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:56,085 INFO L82 PathProgramCache]: Analyzing trace with hash 3785701, now seen corresponding path program 1 times [2020-11-28 07:37:56,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:56,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232039571] [2020-11-28 07:37:56,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:56,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:56,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:56,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232039571] [2020-11-28 07:37:56,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:56,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:56,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127353948] [2020-11-28 07:37:56,266 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-11-28 07:37:56,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:56,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-11-28 07:37:56,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-11-28 07:37:56,288 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 2 states. [2020-11-28 07:37:56,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:56,304 INFO L93 Difference]: Finished difference Result 36 states and 39 transitions. [2020-11-28 07:37:56,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-11-28 07:37:56,306 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-11-28 07:37:56,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:56,316 INFO L225 Difference]: With dead ends: 36 [2020-11-28 07:37:56,317 INFO L226 Difference]: Without dead ends: 33 [2020-11-28 07:37:56,319 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 [2020-11-28 07:37:56,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-11-28 07:37:56,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-11-28 07:37:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 07:37:56,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-11-28 07:37:56,358 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 4 [2020-11-28 07:37:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:56,359 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-11-28 07:37:56,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-11-28 07:37:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-11-28 07:37:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:37:56,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:56,360 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:37:56,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-28 07:37:56,361 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:56,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:56,363 INFO L82 PathProgramCache]: Analyzing trace with hash 117331974, now seen corresponding path program 1 times [2020-11-28 07:37:56,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:56,363 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720437069] [2020-11-28 07:37:56,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:56,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:56,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720437069] [2020-11-28 07:37:56,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:56,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:56,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626915661] [2020-11-28 07:37:56,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:56,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:56,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:56,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:56,447 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 4 states. [2020-11-28 07:37:56,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:56,674 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2020-11-28 07:37:56,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:56,675 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:37:56,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:56,676 INFO L225 Difference]: With dead ends: 40 [2020-11-28 07:37:56,677 INFO L226 Difference]: Without dead ends: 40 [2020-11-28 07:37:56,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:56,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-11-28 07:37:56,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 35. [2020-11-28 07:37:56,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-11-28 07:37:56,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2020-11-28 07:37:56,691 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 5 [2020-11-28 07:37:56,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:56,692 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2020-11-28 07:37:56,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:56,693 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2020-11-28 07:37:56,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-11-28 07:37:56,693 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:56,693 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-11-28 07:37:56,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-28 07:37:56,694 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:56,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:56,695 INFO L82 PathProgramCache]: Analyzing trace with hash 117331975, now seen corresponding path program 1 times [2020-11-28 07:37:56,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:56,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712037118] [2020-11-28 07:37:56,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:56,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:56,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712037118] [2020-11-28 07:37:56,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:56,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-28 07:37:56,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761101607] [2020-11-28 07:37:56,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:56,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:56,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:56,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:56,788 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 4 states. [2020-11-28 07:37:56,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:56,989 INFO L93 Difference]: Finished difference Result 46 states and 48 transitions. [2020-11-28 07:37:56,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:56,991 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-11-28 07:37:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:56,995 INFO L225 Difference]: With dead ends: 46 [2020-11-28 07:37:56,995 INFO L226 Difference]: Without dead ends: 46 [2020-11-28 07:37:56,996 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:56,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-11-28 07:37:57,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-11-28 07:37:57,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 07:37:57,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-11-28 07:37:57,009 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 5 [2020-11-28 07:37:57,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:57,010 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-11-28 07:37:57,010 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:57,011 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-11-28 07:37:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-28 07:37:57,011 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:57,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:57,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-28 07:37:57,013 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:57,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:57,015 INFO L82 PathProgramCache]: Analyzing trace with hash -666473905, now seen corresponding path program 1 times [2020-11-28 07:37:57,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:57,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85335167] [2020-11-28 07:37:57,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:57,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85335167] [2020-11-28 07:37:57,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:57,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-28 07:37:57,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200457707] [2020-11-28 07:37:57,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:37:57,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:57,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:37:57,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:37:57,117 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 4 states. [2020-11-28 07:37:57,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:57,255 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2020-11-28 07:37:57,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:37:57,258 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-11-28 07:37:57,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:57,259 INFO L225 Difference]: With dead ends: 44 [2020-11-28 07:37:57,260 INFO L226 Difference]: Without dead ends: 44 [2020-11-28 07:37:57,260 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:57,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-11-28 07:37:57,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 41. [2020-11-28 07:37:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 07:37:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2020-11-28 07:37:57,271 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 8 [2020-11-28 07:37:57,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:57,271 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2020-11-28 07:37:57,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:37:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2020-11-28 07:37:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:37:57,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:57,273 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:57,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-28 07:37:57,274 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:57,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:57,278 INFO L82 PathProgramCache]: Analyzing trace with hash 668297343, now seen corresponding path program 1 times [2020-11-28 07:37:57,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:57,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800112718] [2020-11-28 07:37:57,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:57,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800112718] [2020-11-28 07:37:57,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:57,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-11-28 07:37:57,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312585945] [2020-11-28 07:37:57,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:37:57,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:57,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:37:57,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:37:57,406 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand 6 states. [2020-11-28 07:37:57,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:57,711 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2020-11-28 07:37:57,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:57,721 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 11 [2020-11-28 07:37:57,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:57,722 INFO L225 Difference]: With dead ends: 48 [2020-11-28 07:37:57,722 INFO L226 Difference]: Without dead ends: 48 [2020-11-28 07:37:57,723 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-28 07:37:57,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2020-11-28 07:37:57,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-11-28 07:37:57,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2020-11-28 07:37:57,729 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 11 [2020-11-28 07:37:57,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:57,730 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2020-11-28 07:37:57,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:37:57,730 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2020-11-28 07:37:57,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:37:57,731 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:57,731 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:57,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-28 07:37:57,732 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1978158978, now seen corresponding path program 1 times [2020-11-28 07:37:57,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:57,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859845078] [2020-11-28 07:37:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:57,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:57,864 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:57,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859845078] [2020-11-28 07:37:57,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:57,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:37:57,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540599343] [2020-11-28 07:37:57,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:37:57,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:57,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:37:57,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:57,867 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand 5 states. [2020-11-28 07:37:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:58,061 INFO L93 Difference]: Finished difference Result 55 states and 58 transitions. [2020-11-28 07:37:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:58,062 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 07:37:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:58,063 INFO L225 Difference]: With dead ends: 55 [2020-11-28 07:37:58,064 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 07:37:58,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-11-28 07:37:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 07:37:58,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-11-28 07:37:58,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-28 07:37:58,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-11-28 07:37:58,070 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 11 [2020-11-28 07:37:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:58,070 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-11-28 07:37:58,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:37:58,070 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-11-28 07:37:58,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:37:58,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:58,071 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:58,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-28 07:37:58,072 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:58,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:58,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1978158979, now seen corresponding path program 1 times [2020-11-28 07:37:58,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:58,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222919744] [2020-11-28 07:37:58,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:58,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:37:58,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:37:58,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222919744] [2020-11-28 07:37:58,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:37:58,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-28 07:37:58,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578339116] [2020-11-28 07:37:58,216 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-28 07:37:58,216 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-11-28 07:37:58,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-28 07:37:58,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:37:58,217 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 5 states. [2020-11-28 07:37:58,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:37:58,425 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2020-11-28 07:37:58,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-11-28 07:37:58,426 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-11-28 07:37:58,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:37:58,427 INFO L225 Difference]: With dead ends: 50 [2020-11-28 07:37:58,427 INFO L226 Difference]: Without dead ends: 50 [2020-11-28 07:37:58,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:37:58,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-28 07:37:58,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 33. [2020-11-28 07:37:58,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 07:37:58,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-11-28 07:37:58,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 11 [2020-11-28 07:37:58,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:37:58,433 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-11-28 07:37:58,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-28 07:37:58,433 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-11-28 07:37:58,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-28 07:37:58,434 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:37:58,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:37:58,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-28 07:37:58,435 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:37:58,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:37:58,436 INFO L82 PathProgramCache]: Analyzing trace with hash -758068539, now seen corresponding path program 1 times [2020-11-28 07:37:58,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-11-28 07:37:58,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6489487] [2020-11-28 07:37:58,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-28 07:37:58,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:37:58,464 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:37:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:37:58,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:37:58,545 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-11-28 07:37:58,546 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:37:58,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-28 07:37:58,600 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:37:58 BoogieIcfgContainer [2020-11-28 07:37:58,601 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:37:58,601 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:37:58,602 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:37:58,602 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:37:58,602 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:37:55" (3/4) ... [2020-11-28 07:37:58,606 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:37:58,606 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:37:58,608 INFO L168 Benchmark]: Toolchain (without parser) took 4288.45 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 72.4 MB in the beginning and 72.8 MB in the end (delta: -438.8 kB). Peak memory consumption was 34.8 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:58,612 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 109.1 MB. Free memory is still 89.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:58,615 INFO L168 Benchmark]: CACSL2BoogieTranslator took 637.90 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 72.5 MB in the end (delta: -244.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:58,615 INFO L168 Benchmark]: Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:58,616 INFO L168 Benchmark]: Boogie Preprocessor took 34.86 ms. Allocated memory is still 109.1 MB. Free memory was 70.8 MB in the beginning and 69.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:58,617 INFO L168 Benchmark]: RCFGBuilder took 920.89 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 85.0 MB in the end (delta: -15.8 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:58,618 INFO L168 Benchmark]: TraceAbstraction took 2631.45 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 84.5 MB in the beginning and 72.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:37:58,618 INFO L168 Benchmark]: Witness Printer took 4.39 ms. Allocated memory is still 144.7 MB. Free memory is still 72.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:37:58,623 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 109.1 MB. Free memory is still 89.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 637.90 ms. Allocated memory is still 109.1 MB. Free memory was 72.3 MB in the beginning and 72.5 MB in the end (delta: -244.5 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 50.12 ms. Allocated memory is still 109.1 MB. Free memory was 72.5 MB in the beginning and 70.8 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 34.86 ms. Allocated memory is still 109.1 MB. Free memory was 70.8 MB in the beginning and 69.2 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 920.89 ms. Allocated memory is still 109.1 MB. Free memory was 69.2 MB in the beginning and 85.0 MB in the end (delta: -15.8 MB). Peak memory consumption was 31.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2631.45 ms. Allocated memory was 109.1 MB in the beginning and 144.7 MB in the end (delta: 35.7 MB). Free memory was 84.5 MB in the beginning and 72.8 MB in the end (delta: 11.7 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.1 GB. * Witness Printer took 4.39 ms. Allocated memory is still 144.7 MB. Free memory is still 72.8 MB. There was no memory consumed. 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 a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 37 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.4s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 1.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 161 SDtfs, 232 SDslu, 134 SDs, 0 SdLazy, 308 SolverSat, 60 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=44occurred in iteration=5, 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, 7 MinimizatonAttempts, 47 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 67 NumberOfCodeBlocks, 67 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 48 ConstructedInterpolants, 0 QuantifiedInterpolants, 2058 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 4/4 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 [2020-11-28 07:38:01,529 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-28 07:38:01,532 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-28 07:38:01,585 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-28 07:38:01,586 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-28 07:38:01,592 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-28 07:38:01,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-28 07:38:01,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-28 07:38:01,605 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-28 07:38:01,612 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-28 07:38:01,614 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-28 07:38:01,619 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-28 07:38:01,620 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-28 07:38:01,627 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-28 07:38:01,629 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-28 07:38:01,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-28 07:38:01,632 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-28 07:38:01,637 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-28 07:38:01,641 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-28 07:38:01,650 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-28 07:38:01,653 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-28 07:38:01,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-28 07:38:01,664 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-28 07:38:01,666 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-28 07:38:01,669 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-28 07:38:01,670 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-28 07:38:01,671 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-28 07:38:01,672 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-28 07:38:01,673 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-28 07:38:01,674 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-28 07:38:01,675 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-28 07:38:01,676 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-28 07:38:01,677 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-28 07:38:01,678 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-28 07:38:01,680 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-28 07:38:01,680 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-28 07:38:01,682 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-28 07:38:01,682 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-28 07:38:01,683 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-28 07:38:01,684 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-28 07:38:01,685 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-28 07:38:01,686 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-11-28 07:38:01,739 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-28 07:38:01,742 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-28 07:38:01,744 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-11-28 07:38:01,745 INFO L138 SettingsManager]: * User list type=DISABLED [2020-11-28 07:38:01,745 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-11-28 07:38:01,746 INFO L138 SettingsManager]: * Explicit value domain=true [2020-11-28 07:38:01,746 INFO L138 SettingsManager]: * Octagon Domain=false [2020-11-28 07:38:01,747 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-11-28 07:38:01,747 INFO L138 SettingsManager]: * Interval Domain=false [2020-11-28 07:38:01,749 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-28 07:38:01,750 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-28 07:38:01,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-28 07:38:01,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-28 07:38:01,751 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-11-28 07:38:01,752 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-28 07:38:01,752 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-28 07:38:01,752 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-28 07:38:01,753 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-11-28 07:38:01,753 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-11-28 07:38:01,753 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-11-28 07:38:01,754 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-28 07:38:01,754 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-11-28 07:38:01,754 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-11-28 07:38:01,755 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-11-28 07:38:01,755 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-28 07:38:01,755 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-28 07:38:01,756 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-28 07:38:01,756 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-28 07:38:01,757 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-28 07:38:01,757 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-28 07:38:01,757 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-28 07:38:01,758 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-28 07:38:01,758 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-28 07:38:01,759 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-11-28 07:38:01,759 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --rewrite-divk --print-success --lang smt [2020-11-28 07:38:01,759 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-11-28 07:38:01,760 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-11-28 07:38:01,760 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_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 621ace555bcaba2bfc5c3f9f05e7d0c3e0e54892 [2020-11-28 07:38:02,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-28 07:38:02,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-28 07:38:02,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-28 07:38:02,290 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-28 07:38:02,293 INFO L275 PluginConnector]: CDTParser initialized [2020-11-28 07:38:02,294 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/../../sv-benchmarks/c/list-properties/simple-2.i [2020-11-28 07:38:02,385 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/606b63e65/30c2e07068f54c9bbee8f67db9a58068/FLAGcc67efe30 [2020-11-28 07:38:03,175 INFO L306 CDTParser]: Found 1 translation units. [2020-11-28 07:38:03,181 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/sv-benchmarks/c/list-properties/simple-2.i [2020-11-28 07:38:03,197 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/606b63e65/30c2e07068f54c9bbee8f67db9a58068/FLAGcc67efe30 [2020-11-28 07:38:03,393 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/data/606b63e65/30c2e07068f54c9bbee8f67db9a58068 [2020-11-28 07:38:03,396 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-28 07:38:03,398 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-11-28 07:38:03,407 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:03,407 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-28 07:38:03,412 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-28 07:38:03,413 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:03" (1/1) ... [2020-11-28 07:38:03,415 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66f75e38 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:03, skipping insertion in model container [2020-11-28 07:38:03,415 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.11 07:38:03" (1/1) ... [2020-11-28 07:38:03,427 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-28 07:38:03,498 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-28 07:38:03,879 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:03,942 INFO L203 MainTranslator]: Completed pre-run [2020-11-28 07:38:04,023 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-28 07:38:04,099 INFO L208 MainTranslator]: Completed translation [2020-11-28 07:38:04,099 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04 WrapperNode [2020-11-28 07:38:04,100 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-28 07:38:04,101 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:04,101 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-28 07:38:04,101 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-28 07:38:04,110 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,132 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,156 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-28 07:38:04,157 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-28 07:38:04,157 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-28 07:38:04,157 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-28 07:38:04,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,173 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,174 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,184 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,190 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,192 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... [2020-11-28 07:38:04,197 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-28 07:38:04,198 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-28 07:38:04,204 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-28 07:38:04,204 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-28 07:38:04,205 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:04,291 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-11-28 07:38:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-28 07:38:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-28 07:38:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-28 07:38:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-28 07:38:04,292 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-11-28 07:38:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-11-28 07:38:04,293 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-28 07:38:04,293 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-28 07:38:04,954 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-28 07:38:04,954 INFO L298 CfgBuilder]: Removed 12 assume(true) statements. [2020-11-28 07:38:04,956 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:04 BoogieIcfgContainer [2020-11-28 07:38:04,956 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-28 07:38:04,958 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-28 07:38:04,958 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-28 07:38:04,986 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-28 07:38:04,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.11 07:38:03" (1/3) ... [2020-11-28 07:38:04,987 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c514336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:04, skipping insertion in model container [2020-11-28 07:38:04,987 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.11 07:38:04" (2/3) ... [2020-11-28 07:38:04,988 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c514336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.11 07:38:04, skipping insertion in model container [2020-11-28 07:38:04,988 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:04" (3/3) ... [2020-11-28 07:38:04,990 INFO L111 eAbstractionObserver]: Analyzing ICFG simple-2.i [2020-11-28 07:38:05,004 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-28 07:38:05,010 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 16 error locations. [2020-11-28 07:38:05,029 INFO L253 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2020-11-28 07:38:05,053 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-28 07:38:05,054 INFO L378 AbstractCegarLoop]: Hoare is false [2020-11-28 07:38:05,054 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-28 07:38:05,054 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-28 07:38:05,054 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-28 07:38:05,054 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-28 07:38:05,055 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-28 07:38:05,055 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-28 07:38:05,071 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-11-28 07:38:05,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:05,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:05,079 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:05,080 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:05,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:05,087 INFO L82 PathProgramCache]: Analyzing trace with hash 889599230, now seen corresponding path program 1 times [2020-11-28 07:38:05,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:05,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1050273977] [2020-11-28 07:38:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:05,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:05,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:38:05,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:05,387 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 [2020-11-28 07:38:05,388 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:05,428 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:05,429 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:05,429 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-28 07:38:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:05,451 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:05,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1050273977] [2020-11-28 07:38:05,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:05,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2020-11-28 07:38:05,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996624973] [2020-11-28 07:38:05,477 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:05,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:05,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:05,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:05,503 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-11-28 07:38:05,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:05,859 INFO L93 Difference]: Finished difference Result 53 states and 57 transitions. [2020-11-28 07:38:05,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:05,862 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-28 07:38:05,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:05,873 INFO L225 Difference]: With dead ends: 53 [2020-11-28 07:38:05,873 INFO L226 Difference]: Without dead ends: 47 [2020-11-28 07:38:05,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:05,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-11-28 07:38:05,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 41. [2020-11-28 07:38:05,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-28 07:38:05,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2020-11-28 07:38:05,913 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 6 [2020-11-28 07:38:05,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:05,914 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2020-11-28 07:38:05,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:05,914 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2020-11-28 07:38:05,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-28 07:38:05,915 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:05,915 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-28 07:38:06,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-11-28 07:38:06,133 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:06,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:06,135 INFO L82 PathProgramCache]: Analyzing trace with hash 889599231, now seen corresponding path program 1 times [2020-11-28 07:38:06,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:06,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1910015060] [2020-11-28 07:38:06,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:06,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:06,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-28 07:38:06,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:06,224 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 [2020-11-28 07:38:06,224 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:06,240 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:06,240 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:06,241 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 07:38:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:06,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:06,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:06,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1910015060] [2020-11-28 07:38:06,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:06,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2020-11-28 07:38:06,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219009283] [2020-11-28 07:38:06,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:38:06,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:06,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:38:06,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:38:06,459 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand 6 states. [2020-11-28 07:38:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:07,030 INFO L93 Difference]: Finished difference Result 58 states and 60 transitions. [2020-11-28 07:38:07,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-28 07:38:07,036 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 6 [2020-11-28 07:38:07,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:07,037 INFO L225 Difference]: With dead ends: 58 [2020-11-28 07:38:07,038 INFO L226 Difference]: Without dead ends: 58 [2020-11-28 07:38:07,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:38:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-28 07:38:07,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 48. [2020-11-28 07:38:07,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 07:38:07,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-11-28 07:38:07,054 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 6 [2020-11-28 07:38:07,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:07,055 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-11-28 07:38:07,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:38:07,056 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-11-28 07:38:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-28 07:38:07,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:07,058 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:07,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-11-28 07:38:07,281 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:07,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:07,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1828101624, now seen corresponding path program 1 times [2020-11-28 07:38:07,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:07,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [279899770] [2020-11-28 07:38:07,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:07,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:07,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjunts are in the unsatisfiable core [2020-11-28 07:38:07,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:07,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:07,395 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:07,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:07,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [279899770] [2020-11-28 07:38:07,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:07,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2020-11-28 07:38:07,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [97696533] [2020-11-28 07:38:07,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-28 07:38:07,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-28 07:38:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-28 07:38:07,407 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 4 states. [2020-11-28 07:38:07,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:07,642 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2020-11-28 07:38:07,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-28 07:38:07,644 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 11 [2020-11-28 07:38:07,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:07,646 INFO L225 Difference]: With dead ends: 55 [2020-11-28 07:38:07,646 INFO L226 Difference]: Without dead ends: 55 [2020-11-28 07:38:07,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-28 07:38:07,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-28 07:38:07,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2020-11-28 07:38:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-28 07:38:07,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 51 transitions. [2020-11-28 07:38:07,660 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 51 transitions. Word has length 11 [2020-11-28 07:38:07,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:07,666 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 51 transitions. [2020-11-28 07:38:07,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-28 07:38:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 51 transitions. [2020-11-28 07:38:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:38:07,667 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:07,667 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:07,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-11-28 07:38:07,877 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:07,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:07,877 INFO L82 PathProgramCache]: Analyzing trace with hash 903973711, now seen corresponding path program 1 times [2020-11-28 07:38:07,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:07,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [786362428] [2020-11-28 07:38:07,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:07,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:07,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-11-28 07:38:07,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:07,994 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 [2020-11-28 07:38:07,994 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:07,997 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:07,998 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:07,998 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-11-28 07:38:08,021 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 13 treesize of output 9 [2020-11-28 07:38:08,022 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:08,035 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:08,036 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:08,036 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-11-28 07:38:08,064 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 23 treesize of output 11 [2020-11-28 07:38:08,065 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:08,070 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:08,070 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:08,070 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-11-28 07:38:08,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:08,094 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:08,119 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:08,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [786362428] [2020-11-28 07:38:08,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:08,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2020-11-28 07:38:08,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157130137] [2020-11-28 07:38:08,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-28 07:38:08,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:08,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-28 07:38:08,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-11-28 07:38:08,125 INFO L87 Difference]: Start difference. First operand 48 states and 51 transitions. Second operand 6 states. [2020-11-28 07:38:08,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:08,704 INFO L93 Difference]: Finished difference Result 66 states and 70 transitions. [2020-11-28 07:38:08,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-28 07:38:08,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-11-28 07:38:08,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:08,707 INFO L225 Difference]: With dead ends: 66 [2020-11-28 07:38:08,707 INFO L226 Difference]: Without dead ends: 66 [2020-11-28 07:38:08,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-11-28 07:38:08,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-28 07:38:08,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-11-28 07:38:08,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-28 07:38:08,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 49 transitions. [2020-11-28 07:38:08,715 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 49 transitions. Word has length 13 [2020-11-28 07:38:08,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:08,716 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 49 transitions. [2020-11-28 07:38:08,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-11-28 07:38:08,716 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 49 transitions. [2020-11-28 07:38:08,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-28 07:38:08,717 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:08,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:08,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-11-28 07:38:08,936 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:08,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:08,937 INFO L82 PathProgramCache]: Analyzing trace with hash 903973712, now seen corresponding path program 1 times [2020-11-28 07:38:08,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:08,938 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [424861064] [2020-11-28 07:38:08,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:09,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:38:09,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:09,080 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 [2020-11-28 07:38:09,081 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,088 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:09,088 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,089 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-11-28 07:38:09,126 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 13 treesize of output 9 [2020-11-28 07:38:09,127 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,147 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:09,156 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 13 treesize of output 9 [2020-11-28 07:38:09,156 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,174 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:09,176 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,176 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:34, output treesize:23 [2020-11-28 07:38:09,222 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 19 treesize of output 7 [2020-11-28 07:38:09,223 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,244 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:09,248 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 21 treesize of output 9 [2020-11-28 07:38:09,249 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,261 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:09,262 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:09,262 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2020-11-28 07:38:09,315 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:09,315 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:09,656 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:09,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [424861064] [2020-11-28 07:38:09,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:09,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 9 [2020-11-28 07:38:09,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804364619] [2020-11-28 07:38:09,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-28 07:38:09,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:09,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-28 07:38:09,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:38:09,659 INFO L87 Difference]: Start difference. First operand 46 states and 49 transitions. Second operand 10 states. [2020-11-28 07:38:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:10,988 INFO L93 Difference]: Finished difference Result 62 states and 66 transitions. [2020-11-28 07:38:10,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-28 07:38:10,990 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-28 07:38:10,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:10,991 INFO L225 Difference]: With dead ends: 62 [2020-11-28 07:38:10,991 INFO L226 Difference]: Without dead ends: 62 [2020-11-28 07:38:10,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:38:10,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-11-28 07:38:10,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 33. [2020-11-28 07:38:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-11-28 07:38:11,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2020-11-28 07:38:11,005 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 13 [2020-11-28 07:38:11,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:11,005 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2020-11-28 07:38:11,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-28 07:38:11,006 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2020-11-28 07:38:11,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-28 07:38:11,007 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:11,007 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:11,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-11-28 07:38:11,220 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:11,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:11,221 INFO L82 PathProgramCache]: Analyzing trace with hash 821839268, now seen corresponding path program 1 times [2020-11-28 07:38:11,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:11,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915879719] [2020-11-28 07:38:11,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:11,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:11,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-28 07:38:11,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:11,367 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 [2020-11-28 07:38:11,367 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,387 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:11,387 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,387 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:14 [2020-11-28 07:38:11,438 INFO L350 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2020-11-28 07:38:11,438 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 [2020-11-28 07:38:11,439 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,442 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:11,442 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,442 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:7 [2020-11-28 07:38:11,479 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 [2020-11-28 07:38:11,480 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,483 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:11,483 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,483 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:15, output treesize:3 [2020-11-28 07:38:11,501 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:11,501 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:11,515 INFO L545 ElimStorePlain]: Start of recursive call 2: 1 dim-0 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 07:38:11,522 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:11,523 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2020-11-28 07:38:11,524 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2020-11-28 07:38:11,594 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 164 treesize of output 156 [2020-11-28 07:38:11,596 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:38:11,609 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:38:11,614 INFO L603 QuantifierPusher]: Distributing 3 disjuncts over 2 conjuncts [2020-11-28 07:38:11,617 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-28 07:38:11,624 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:11,788 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 15 [2020-11-28 07:38:11,789 INFO L625 ElimStorePlain]: treesize reduction 142, result has 12.3 percent of original size [2020-11-28 07:38:11,793 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:38:11,794 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:7 [2020-11-28 07:38:11,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:11,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915879719] [2020-11-28 07:38:11,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-11-28 07:38:11,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7, 7] imperfect sequences [] total 8 [2020-11-28 07:38:11,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315777847] [2020-11-28 07:38:11,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-28 07:38:11,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:11,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-28 07:38:11,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-28 07:38:11,798 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand 8 states. [2020-11-28 07:38:12,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:12,402 INFO L93 Difference]: Finished difference Result 75 states and 78 transitions. [2020-11-28 07:38:12,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-28 07:38:12,404 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 14 [2020-11-28 07:38:12,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:12,405 INFO L225 Difference]: With dead ends: 75 [2020-11-28 07:38:12,405 INFO L226 Difference]: Without dead ends: 75 [2020-11-28 07:38:12,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-11-28 07:38:12,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-28 07:38:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 40. [2020-11-28 07:38:12,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-11-28 07:38:12,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2020-11-28 07:38:12,412 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 14 [2020-11-28 07:38:12,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:12,413 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2020-11-28 07:38:12,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-28 07:38:12,413 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2020-11-28 07:38:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-28 07:38:12,414 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:12,414 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:12,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-11-28 07:38:12,628 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:12,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:12,628 INFO L82 PathProgramCache]: Analyzing trace with hash -280383217, now seen corresponding path program 1 times [2020-11-28 07:38:12,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:12,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1815305143] [2020-11-28 07:38:12,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/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 [2020-11-28 07:38:12,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-28 07:38:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:12,754 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 13 treesize of output 9 [2020-11-28 07:38:12,754 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,777 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:12,785 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 13 treesize of output 9 [2020-11-28 07:38:12,785 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,802 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:12,803 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,803 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:27, output treesize:19 [2020-11-28 07:38:12,873 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 19 treesize of output 7 [2020-11-28 07:38:12,874 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,891 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:12,899 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 19 treesize of output 7 [2020-11-28 07:38:12,900 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,909 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:12,910 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:12,910 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:37, output treesize:7 [2020-11-28 07:38:12,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:12,958 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:12,992 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 35 treesize of output 29 [2020-11-28 07:38:12,994 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,031 INFO L625 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2020-11-28 07:38:13,031 INFO L513 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-11-28 07:38:13,031 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2020-11-28 07:38:13,034 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1815305143] [2020-11-28 07:38:13,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1227029753] [2020-11-28 07:38:13,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-11-28 07:38:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:13,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-28 07:38:13,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:13,273 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 13 treesize of output 9 [2020-11-28 07:38:13,274 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,287 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,295 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 13 treesize of output 9 [2020-11-28 07:38:13,295 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,308 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,309 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,309 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-11-28 07:38:13,429 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 [2020-11-28 07:38:13,430 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,443 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,447 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 [2020-11-28 07:38:13,447 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,455 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,456 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,456 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-11-28 07:38:13,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:13,459 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:13,485 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 35 treesize of output 29 [2020-11-28 07:38:13,492 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,533 INFO L625 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2020-11-28 07:38:13,534 INFO L513 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-11-28 07:38:13,534 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,534 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2020-11-28 07:38:13,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:13,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018937061] [2020-11-28 07:38:13,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-28 07:38:13,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-28 07:38:13,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-28 07:38:13,654 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 13 treesize of output 9 [2020-11-28 07:38:13,654 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,672 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,684 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 13 treesize of output 9 [2020-11-28 07:38:13,684 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,704 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,705 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,705 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 2 variables, input treesize:30, output treesize:22 [2020-11-28 07:38:13,730 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 [2020-11-28 07:38:13,731 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,740 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,744 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 [2020-11-28 07:38:13,745 INFO L545 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-11-28 07:38:13,756 INFO L545 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-11-28 07:38:13,756 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:29, output treesize:7 [2020-11-28 07:38:13,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:13,770 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-11-28 07:38:13,810 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 35 treesize of output 29 [2020-11-28 07:38:13,813 INFO L545 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,842 INFO L625 ElimStorePlain]: treesize reduction 19, result has 36.7 percent of original size [2020-11-28 07:38:13,842 INFO L513 ElimStorePlain]: Eliminatee |#memory_$Pointer$.base| vanished before elimination [2020-11-28 07:38:13,843 INFO L545 ElimStorePlain]: Start of recursive call 1: 2 dim-2 vars, End of recursive call: and 2 xjuncts. [2020-11-28 07:38:13,843 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:39, output treesize:11 [2020-11-28 07:38:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-28 07:38:13,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-11-28 07:38:13,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8, 7, 8, 7] total 11 [2020-11-28 07:38:13,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608509620] [2020-11-28 07:38:13,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-28 07:38:13,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-11-28 07:38:13,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-28 07:38:13,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-11-28 07:38:13,847 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand 11 states. [2020-11-28 07:38:14,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-28 07:38:14,489 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2020-11-28 07:38:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-28 07:38:14,491 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-28 07:38:14,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-28 07:38:14,492 INFO L225 Difference]: With dead ends: 57 [2020-11-28 07:38:14,492 INFO L226 Difference]: Without dead ends: 57 [2020-11-28 07:38:14,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-11-28 07:38:14,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-28 07:38:14,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2020-11-28 07:38:14,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-28 07:38:14,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 46 transitions. [2020-11-28 07:38:14,507 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 46 transitions. Word has length 15 [2020-11-28 07:38:14,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-28 07:38:14,507 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 46 transitions. [2020-11-28 07:38:14,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-28 07:38:14,508 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 46 transitions. [2020-11-28 07:38:14,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-28 07:38:14,509 INFO L414 BasicCegarLoop]: Found error trace [2020-11-28 07:38:14,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-28 07:38:15,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt --rewrite-divk,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-28 07:38:15,115 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-11-28 07:38:15,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-28 07:38:15,115 INFO L82 PathProgramCache]: Analyzing trace with hash -101946165, now seen corresponding path program 1 times [2020-11-28 07:38:15,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-11-28 07:38:15,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1610672896] [2020-11-28 07:38:15,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_a4838ac0-b33b-4167-b3ce-980dee1ea4ee/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-11-28 07:38:15,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:15,203 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-11-28 07:38:15,292 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-11-28 07:38:15,353 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-11-28 07:38:15,353 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-11-28 07:38:15,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-11-28 07:38:15,588 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 28.11 07:38:15 BoogieIcfgContainer [2020-11-28 07:38:15,588 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-28 07:38:15,589 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-11-28 07:38:15,589 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-11-28 07:38:15,589 INFO L275 PluginConnector]: Witness Printer initialized [2020-11-28 07:38:15,590 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.11 07:38:04" (3/4) ... [2020-11-28 07:38:15,593 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-11-28 07:38:15,594 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-11-28 07:38:15,595 INFO L168 Benchmark]: Toolchain (without parser) took 12196.88 ms. Allocated memory was 62.9 MB in the beginning and 104.9 MB in the end (delta: 41.9 MB). Free memory was 41.6 MB in the beginning and 79.2 MB in the end (delta: -37.6 MB). Peak memory consumption was 4.9 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:15,596 INFO L168 Benchmark]: CDTParser took 0.33 ms. Allocated memory is still 62.9 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:15,596 INFO L168 Benchmark]: CACSL2BoogieTranslator took 693.26 ms. Allocated memory is still 62.9 MB. Free memory was 41.5 MB in the beginning and 33.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:15,597 INFO L168 Benchmark]: Boogie Procedure Inliner took 55.39 ms. Allocated memory is still 62.9 MB. Free memory was 33.0 MB in the beginning and 31.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:15,597 INFO L168 Benchmark]: Boogie Preprocessor took 40.52 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 29.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:15,598 INFO L168 Benchmark]: RCFGBuilder took 757.90 ms. Allocated memory is still 62.9 MB. Free memory was 29.5 MB in the beginning and 26.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. [2020-11-28 07:38:15,599 INFO L168 Benchmark]: TraceAbstraction took 10630.16 ms. Allocated memory was 62.9 MB in the beginning and 104.9 MB in the end (delta: 41.9 MB). Free memory was 26.2 MB in the beginning and 79.2 MB in the end (delta: -53.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:15,599 INFO L168 Benchmark]: Witness Printer took 5.14 ms. Allocated memory is still 104.9 MB. Free memory is still 79.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-11-28 07:38:15,602 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.33 ms. Allocated memory is still 62.9 MB. Free memory is still 44.0 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 693.26 ms. Allocated memory is still 62.9 MB. Free memory was 41.5 MB in the beginning and 33.0 MB in the end (delta: 8.5 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 55.39 ms. Allocated memory is still 62.9 MB. Free memory was 33.0 MB in the beginning and 31.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 40.52 ms. Allocated memory is still 62.9 MB. Free memory was 31.0 MB in the beginning and 29.5 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 757.90 ms. Allocated memory is still 62.9 MB. Free memory was 29.5 MB in the beginning and 26.5 MB in the end (delta: 3.0 MB). Peak memory consumption was 6.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 10630.16 ms. Allocated memory was 62.9 MB in the beginning and 104.9 MB in the end (delta: 41.9 MB). Free memory was 26.2 MB in the beginning and 79.2 MB in the end (delta: -53.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * Witness Printer took 5.14 ms. Allocated memory is still 104.9 MB. Free memory is still 79.2 MB. There was no memory consumed. 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 a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] p->h = 1 [L544] p->n = 0 [L545] p = a [L546] COND TRUE p!=0 [L547] EXPR p->h [L547] COND FALSE !(p->h != 1) [L550] EXPR p->n [L550] p = p->n [L546] COND FALSE !(p!=0) [L552] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 45 locations, 16 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 10.5s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 4.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 174 SDtfs, 424 SDslu, 447 SDs, 0 SdLazy, 698 SolverSat, 74 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 220 GetRequests, 165 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=48occurred in iteration=2, 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, 7 MinimizatonAttempts, 121 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 2.6s InterpolantComputationTime, 124 NumberOfCodeBlocks, 124 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 198 ConstructedInterpolants, 1 QuantifiedInterpolants, 18432 SizeOfPredicates, 76 NumberOfNonLiveVariables, 492 ConjunctsInSsa, 78 ConjunctsInUnsatCore, 18 InterpolantComputations, 12 PerfectInterpolantSequences, 10/16 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...