./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety/lockfree-3.2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 7b2dab56 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety/lockfree-3.2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 b010fd4a87c087de2df9a8799a5c607ab9a33d5c .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.0-7b2dab5 [2020-12-09 09:09:27,821 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:09:27,825 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:09:27,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:09:27,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:09:27,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:09:27,854 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:09:27,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:09:27,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:09:27,858 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:09:27,859 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:09:27,860 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:09:27,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:09:27,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:09:27,862 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:09:27,863 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:09:27,864 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:09:27,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:09:27,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:09:27,867 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:09:27,869 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:09:27,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:09:27,871 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:09:27,871 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:09:27,874 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:09:27,874 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:09:27,874 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:09:27,875 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:09:27,875 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:09:27,876 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:09:27,877 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:09:27,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:09:27,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:09:27,878 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:09:27,879 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:09:27,879 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:09:27,880 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:09:27,880 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:09:27,880 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:09:27,881 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:09:27,881 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:09:27,882 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 09:09:27,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:09:27,899 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:09:27,899 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:09:27,900 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 09:09:27,900 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 09:09:27,901 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:09:27,901 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 09:09:27,901 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 09:09:27,901 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 09:09:27,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 09:09:27,901 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 09:09:27,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:09:27,902 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:09:27,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:09:27,903 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:09:27,904 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:09:27,904 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:09:27,904 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_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2020-12-09 09:09:28,080 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:09:28,099 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:09:28,101 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:09:28,102 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:09:28,102 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:09:28,103 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2020-12-09 09:09:28,146 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/e283ed370/f659f6bbb4bb420692641ea87ed56049/FLAG20627d141 [2020-12-09 09:09:28,613 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:09:28,613 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/sv-benchmarks/c/memsafety/lockfree-3.2.i [2020-12-09 09:09:28,622 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/e283ed370/f659f6bbb4bb420692641ea87ed56049/FLAG20627d141 [2020-12-09 09:09:28,632 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/e283ed370/f659f6bbb4bb420692641ea87ed56049 [2020-12-09 09:09:28,634 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:09:28,635 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:09:28,636 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:09:28,636 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:09:28,638 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:09:28,639 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,640 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b9fb8a3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28, skipping insertion in model container [2020-12-09 09:09:28,640 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,645 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:09:28,670 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:09:28,856 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:09:28,863 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:09:28,893 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:09:28,933 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:09:28,934 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28 WrapperNode [2020-12-09 09:09:28,934 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:09:28,934 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:09:28,934 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:09:28,935 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:09:28,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,950 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,967 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:09:28,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:09:28,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:09:28,968 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:09:28,973 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,974 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,977 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,977 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,983 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,986 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,988 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... [2020-12-09 09:09:28,990 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:09:28,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:09:28,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:09:28,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:09:28,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 09:09:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 09:09:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:09:29,053 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 09:09:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:09:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 09:09:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:09:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 09:09:29,054 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:09:29,054 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:09:29,453 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:09:29,453 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 09:09:29,455 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:29 BoogieIcfgContainer [2020-12-09 09:09:29,455 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:09:29,456 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:09:29,456 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:09:29,458 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:09:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:09:28" (1/3) ... [2020-12-09 09:09:29,459 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8cec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:09:29, skipping insertion in model container [2020-12-09 09:09:29,459 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:28" (2/3) ... [2020-12-09 09:09:29,460 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e8cec16 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:09:29, skipping insertion in model container [2020-12-09 09:09:29,460 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:29" (3/3) ... [2020-12-09 09:09:29,461 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2020-12-09 09:09:29,470 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:09:29,473 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-09 09:09:29,480 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-09 09:09:29,494 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:09:29,494 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 09:09:29,494 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:09:29,494 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:09:29,494 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:09:29,494 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:09:29,494 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:09:29,495 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:09:29,504 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-12-09 09:09:29,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 09:09:29,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:29,509 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 09:09:29,509 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:29,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:29,513 INFO L82 PathProgramCache]: Analyzing trace with hash 5730039, now seen corresponding path program 1 times [2020-12-09 09:09:29,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:29,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373546578] [2020-12-09 09:09:29,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:29,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:29,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:29,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373546578] [2020-12-09 09:09:29,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:29,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:29,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382508798] [2020-12-09 09:09:29,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 09:09:29,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:29,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 09:09:29,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 09:09:29,623 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 2 states. [2020-12-09 09:09:29,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:29,633 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2020-12-09 09:09:29,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 09:09:29,634 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 09:09:29,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:29,640 INFO L225 Difference]: With dead ends: 47 [2020-12-09 09:09:29,640 INFO L226 Difference]: Without dead ends: 46 [2020-12-09 09:09:29,641 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 [2020-12-09 09:09:29,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-09 09:09:29,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-09 09:09:29,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-09 09:09:29,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 57 transitions. [2020-12-09 09:09:29,665 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 57 transitions. Word has length 4 [2020-12-09 09:09:29,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:29,665 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 57 transitions. [2020-12-09 09:09:29,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 09:09:29,666 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 57 transitions. [2020-12-09 09:09:29,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:09:29,666 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:29,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:09:29,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 09:09:29,666 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:29,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:29,667 INFO L82 PathProgramCache]: Analyzing trace with hash 178885902, now seen corresponding path program 1 times [2020-12-09 09:09:29,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:29,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690192521] [2020-12-09 09:09:29,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:29,708 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:29,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690192521] [2020-12-09 09:09:29,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:29,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2020-12-09 09:09:29,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845620657] [2020-12-09 09:09:29,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:29,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,710 INFO L87 Difference]: Start difference. First operand 46 states and 57 transitions. Second operand 3 states. [2020-12-09 09:09:29,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:29,765 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-12-09 09:09:29,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:29,765 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 09:09:29,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:29,767 INFO L225 Difference]: With dead ends: 84 [2020-12-09 09:09:29,767 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 09:09:29,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 09:09:29,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 64. [2020-12-09 09:09:29,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 09:09:29,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 96 transitions. [2020-12-09 09:09:29,778 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 96 transitions. Word has length 5 [2020-12-09 09:09:29,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:29,778 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 96 transitions. [2020-12-09 09:09:29,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:29,779 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 96 transitions. [2020-12-09 09:09:29,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:09:29,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:29,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:09:29,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 09:09:29,780 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:29,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:29,780 INFO L82 PathProgramCache]: Analyzing trace with hash 178884958, now seen corresponding path program 1 times [2020-12-09 09:09:29,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:29,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501776946] [2020-12-09 09:09:29,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:29,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:29,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501776946] [2020-12-09 09:09:29,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:29,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:29,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781386362] [2020-12-09 09:09:29,815 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:29,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:29,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:29,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,816 INFO L87 Difference]: Start difference. First operand 64 states and 96 transitions. Second operand 3 states. [2020-12-09 09:09:29,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:29,839 INFO L93 Difference]: Finished difference Result 116 states and 179 transitions. [2020-12-09 09:09:29,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:29,840 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 09:09:29,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:29,841 INFO L225 Difference]: With dead ends: 116 [2020-12-09 09:09:29,841 INFO L226 Difference]: Without dead ends: 115 [2020-12-09 09:09:29,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-09 09:09:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-12-09 09:09:29,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-12-09 09:09:29,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 166 transitions. [2020-12-09 09:09:29,851 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 166 transitions. Word has length 5 [2020-12-09 09:09:29,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:29,851 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 166 transitions. [2020-12-09 09:09:29,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:29,851 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 166 transitions. [2020-12-09 09:09:29,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:09:29,851 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:29,851 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:09:29,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 09:09:29,852 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:29,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:29,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409977, now seen corresponding path program 1 times [2020-12-09 09:09:29,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:29,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863234451] [2020-12-09 09:09:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:29,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:29,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:29,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863234451] [2020-12-09 09:09:29,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:29,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:29,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362009369] [2020-12-09 09:09:29,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:29,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:29,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:29,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,886 INFO L87 Difference]: Start difference. First operand 97 states and 166 transitions. Second operand 3 states. [2020-12-09 09:09:29,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:29,947 INFO L93 Difference]: Finished difference Result 146 states and 235 transitions. [2020-12-09 09:09:29,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:29,947 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:09:29,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:29,949 INFO L225 Difference]: With dead ends: 146 [2020-12-09 09:09:29,949 INFO L226 Difference]: Without dead ends: 146 [2020-12-09 09:09:29,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:29,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-12-09 09:09:29,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 127. [2020-12-09 09:09:29,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-12-09 09:09:29,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 223 transitions. [2020-12-09 09:09:29,962 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 223 transitions. Word has length 6 [2020-12-09 09:09:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:29,962 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 223 transitions. [2020-12-09 09:09:29,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 223 transitions. [2020-12-09 09:09:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:09:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:29,963 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:09:29,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 09:09:29,963 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash 1250409978, now seen corresponding path program 1 times [2020-12-09 09:09:29,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:29,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083710195] [2020-12-09 09:09:29,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:30,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:30,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083710195] [2020-12-09 09:09:30,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:30,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:30,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255445787] [2020-12-09 09:09:30,001 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:30,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:30,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:30,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:30,002 INFO L87 Difference]: Start difference. First operand 127 states and 223 transitions. Second operand 3 states. [2020-12-09 09:09:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:30,045 INFO L93 Difference]: Finished difference Result 141 states and 226 transitions. [2020-12-09 09:09:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:30,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:09:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:30,047 INFO L225 Difference]: With dead ends: 141 [2020-12-09 09:09:30,047 INFO L226 Difference]: Without dead ends: 141 [2020-12-09 09:09:30,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:30,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-09 09:09:30,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2020-12-09 09:09:30,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-09 09:09:30,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 215 transitions. [2020-12-09 09:09:30,058 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 215 transitions. Word has length 6 [2020-12-09 09:09:30,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:30,059 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 215 transitions. [2020-12-09 09:09:30,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:30,059 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 215 transitions. [2020-12-09 09:09:30,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:09:30,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:30,059 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:30,060 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 09:09:30,060 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:30,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:30,060 INFO L82 PathProgramCache]: Analyzing trace with hash 108011627, now seen corresponding path program 1 times [2020-12-09 09:09:30,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:30,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319896747] [2020-12-09 09:09:30,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:30,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:30,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:30,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319896747] [2020-12-09 09:09:30,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:30,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:09:30,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1804558433] [2020-12-09 09:09:30,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:09:30,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:09:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:09:30,096 INFO L87 Difference]: Start difference. First operand 125 states and 215 transitions. Second operand 4 states. [2020-12-09 09:09:30,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:30,110 INFO L93 Difference]: Finished difference Result 136 states and 191 transitions. [2020-12-09 09:09:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 09:09:30,111 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:09:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:30,111 INFO L225 Difference]: With dead ends: 136 [2020-12-09 09:09:30,112 INFO L226 Difference]: Without dead ends: 136 [2020-12-09 09:09:30,112 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:09:30,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-09 09:09:30,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 79. [2020-12-09 09:09:30,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-09 09:09:30,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 124 transitions. [2020-12-09 09:09:30,116 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 124 transitions. Word has length 7 [2020-12-09 09:09:30,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:30,117 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 124 transitions. [2020-12-09 09:09:30,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:09:30,117 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 124 transitions. [2020-12-09 09:09:30,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:09:30,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:30,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:30,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 09:09:30,117 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:30,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:30,118 INFO L82 PathProgramCache]: Analyzing trace with hash -896205382, now seen corresponding path program 1 times [2020-12-09 09:09:30,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:30,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752917840] [2020-12-09 09:09:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:30,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:30,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752917840] [2020-12-09 09:09:30,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:30,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:09:30,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56212364] [2020-12-09 09:09:30,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:09:30,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 09:09:30,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:09:30,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:09:30,141 INFO L87 Difference]: Start difference. First operand 79 states and 124 transitions. Second operand 4 states. [2020-12-09 09:09:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:30,169 INFO L93 Difference]: Finished difference Result 173 states and 247 transitions. [2020-12-09 09:09:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:09:30,170 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 09:09:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:30,171 INFO L225 Difference]: With dead ends: 173 [2020-12-09 09:09:30,171 INFO L226 Difference]: Without dead ends: 173 [2020-12-09 09:09:30,171 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 [2020-12-09 09:09:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-09 09:09:30,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2020-12-09 09:09:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-09 09:09:30,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 173 transitions. [2020-12-09 09:09:30,176 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 173 transitions. Word has length 8 [2020-12-09 09:09:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:30,176 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 173 transitions. [2020-12-09 09:09:30,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:09:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 173 transitions. [2020-12-09 09:09:30,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:09:30,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:30,177 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:30,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 09:09:30,177 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:30,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:30,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1590894966, now seen corresponding path program 1 times [2020-12-09 09:09:30,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 09:09:30,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152635073] [2020-12-09 09:09:30,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 09:09:30,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:09:30,192 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:09:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:09:30,205 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:09:30,223 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 09:09:30,223 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:09:30,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 09:09:30,246 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:09:30 BoogieIcfgContainer [2020-12-09 09:09:30,247 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:09:30,247 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:09:30,247 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:09:30,247 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:09:30,248 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:29" (3/4) ... [2020-12-09 09:09:30,250 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:09:30,250 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:09:30,251 INFO L168 Benchmark]: Toolchain (without parser) took 1615.32 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 39.1 MB in the beginning and 53.1 MB in the end (delta: -14.0 MB). Peak memory consumption was 10.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,252 INFO L168 Benchmark]: CDTParser took 0.15 ms. Allocated memory is still 75.5 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:09:30,252 INFO L168 Benchmark]: CACSL2BoogieTranslator took 297.83 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 38.9 MB in the beginning and 65.5 MB in the end (delta: -26.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,253 INFO L168 Benchmark]: Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 100.7 MB. Free memory was 65.5 MB in the beginning and 63.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,253 INFO L168 Benchmark]: Boogie Preprocessor took 22.75 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 61.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,254 INFO L168 Benchmark]: RCFGBuilder took 464.28 ms. Allocated memory is still 100.7 MB. Free memory was 61.9 MB in the beginning and 58.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,254 INFO L168 Benchmark]: TraceAbstraction took 790.70 ms. Allocated memory is still 100.7 MB. Free memory was 58.3 MB in the beginning and 53.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:30,254 INFO L168 Benchmark]: Witness Printer took 2.87 ms. Allocated memory is still 100.7 MB. Free memory was 53.8 MB in the beginning and 53.1 MB in the end (delta: 749.6 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:09:30,257 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15 ms. Allocated memory is still 75.5 MB. Free memory is still 56.8 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 297.83 ms. Allocated memory was 75.5 MB in the beginning and 100.7 MB in the end (delta: 25.2 MB). Free memory was 38.9 MB in the beginning and 65.5 MB in the end (delta: -26.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 32.53 ms. Allocated memory is still 100.7 MB. Free memory was 65.5 MB in the beginning and 63.4 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.75 ms. Allocated memory is still 100.7 MB. Free memory was 63.4 MB in the beginning and 61.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 464.28 ms. Allocated memory is still 100.7 MB. Free memory was 61.9 MB in the beginning and 58.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 27.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 790.70 ms. Allocated memory is still 100.7 MB. Free memory was 58.3 MB in the beginning and 53.8 MB in the end (delta: 4.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. * Witness Printer took 2.87 ms. Allocated memory is still 100.7 MB. Free memory was 53.8 MB in the beginning and 53.1 MB in the end (delta: 749.6 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] S || 1 != pc4 || __VERIFIER_nondet_int() [L594] S || 1 != pc4 || __VERIFIER_nondet_int() VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={-2:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 47 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.7s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 482 SDtfs, 325 SDslu, 295 SDs, 0 SdLazy, 148 SolverSat, 19 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=127occurred in iteration=4, 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, 189 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 52 NumberOfCodeBlocks, 52 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 34 ConstructedInterpolants, 0 QuantifiedInterpolants, 418 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 PerfectInterpolantSequences, 0/0 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 0.2.0-7b2dab5 [2020-12-09 09:09:32,008 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 09:09:32,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 09:09:32,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 09:09:32,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 09:09:32,038 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 09:09:32,039 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 09:09:32,041 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 09:09:32,043 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 09:09:32,043 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 09:09:32,044 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 09:09:32,049 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 09:09:32,049 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 09:09:32,050 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 09:09:32,051 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 09:09:32,052 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 09:09:32,053 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 09:09:32,054 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 09:09:32,056 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 09:09:32,057 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 09:09:32,059 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 09:09:32,060 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 09:09:32,061 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 09:09:32,062 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 09:09:32,065 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 09:09:32,065 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 09:09:32,065 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 09:09:32,066 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 09:09:32,066 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 09:09:32,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 09:09:32,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 09:09:32,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 09:09:32,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 09:09:32,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 09:09:32,070 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 09:09:32,071 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 09:09:32,071 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 09:09:32,072 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 09:09:32,072 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 09:09:32,073 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 09:09:32,073 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 09:09:32,074 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 09:09:32,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 09:09:32,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 09:09:32,094 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 09:09:32,094 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 09:09:32,094 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 09:09:32,094 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 09:09:32,094 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 09:09:32,094 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 09:09:32,094 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 09:09:32,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 09:09:32,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 09:09:32,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 09:09:32,095 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 09:09:32,096 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 09:09:32,097 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 09:09:32,097 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 09:09:32,098 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 09:09:32,098 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 09:09:32,098 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 09:09:32,098 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 09:09:32,098 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 09:09:32,098 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 09:09:32,098 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_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b010fd4a87c087de2df9a8799a5c607ab9a33d5c [2020-12-09 09:09:32,322 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 09:09:32,337 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 09:09:32,339 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 09:09:32,339 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 09:09:32,340 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 09:09:32,341 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/../../sv-benchmarks/c/memsafety/lockfree-3.2.i [2020-12-09 09:09:32,380 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/5dd4d217b/42f23c07963d492d8cd0b933c359f64a/FLAG8371a1126 [2020-12-09 09:09:32,824 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 09:09:32,824 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/sv-benchmarks/c/memsafety/lockfree-3.2.i [2020-12-09 09:09:32,836 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/5dd4d217b/42f23c07963d492d8cd0b933c359f64a/FLAG8371a1126 [2020-12-09 09:09:32,846 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/data/5dd4d217b/42f23c07963d492d8cd0b933c359f64a [2020-12-09 09:09:32,848 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 09:09:32,849 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 09:09:32,850 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 09:09:32,850 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 09:09:32,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 09:09:32,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:09:32" (1/1) ... [2020-12-09 09:09:32,854 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1f39fa27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:32, skipping insertion in model container [2020-12-09 09:09:32,855 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 09:09:32" (1/1) ... [2020-12-09 09:09:32,865 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 09:09:32,899 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 09:09:33,101 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:09:33,111 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 09:09:33,143 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 09:09:33,187 INFO L208 MainTranslator]: Completed translation [2020-12-09 09:09:33,187 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33 WrapperNode [2020-12-09 09:09:33,187 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 09:09:33,188 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 09:09:33,188 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 09:09:33,188 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 09:09:33,193 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,207 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,223 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 09:09:33,224 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 09:09:33,224 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 09:09:33,224 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 09:09:33,230 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,230 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,234 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,240 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,243 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... [2020-12-09 09:09:33,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 09:09:33,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 09:09:33,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 09:09:33,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 09:09:33,249 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:33,310 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 09:09:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 09:09:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 09:09:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 09:09:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 09:09:33,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-09 09:09:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 09:09:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 09:09:33,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 09:09:33,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 09:09:33,729 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 09:09:33,729 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2020-12-09 09:09:33,731 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:33 BoogieIcfgContainer [2020-12-09 09:09:33,731 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 09:09:33,733 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 09:09:33,733 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 09:09:33,736 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 09:09:33,736 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 09:09:32" (1/3) ... [2020-12-09 09:09:33,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2fc8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:09:33, skipping insertion in model container [2020-12-09 09:09:33,737 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 09:09:33" (2/3) ... [2020-12-09 09:09:33,737 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1e2fc8c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 09:09:33, skipping insertion in model container [2020-12-09 09:09:33,738 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:33" (3/3) ... [2020-12-09 09:09:33,739 INFO L111 eAbstractionObserver]: Analyzing ICFG lockfree-3.2.i [2020-12-09 09:09:33,753 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 09:09:33,756 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 20 error locations. [2020-12-09 09:09:33,767 INFO L253 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2020-12-09 09:09:33,785 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 09:09:33,785 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 09:09:33,785 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 09:09:33,785 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 09:09:33,785 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 09:09:33,785 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 09:09:33,785 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 09:09:33,785 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 09:09:33,795 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states. [2020-12-09 09:09:33,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 09:09:33,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:33,800 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 09:09:33,800 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:33,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:33,806 INFO L82 PathProgramCache]: Analyzing trace with hash 28701576, now seen corresponding path program 1 times [2020-12-09 09:09:33,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:33,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1588418083] [2020-12-09 09:09:33,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:33,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:09:33,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:33,926 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:33,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1588418083] [2020-12-09 09:09:33,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:33,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833751756] [2020-12-09 09:09:33,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:33,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:33,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:33,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:33,941 INFO L87 Difference]: Start difference. First operand 60 states. Second operand 3 states. [2020-12-09 09:09:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:33,994 INFO L93 Difference]: Finished difference Result 103 states and 135 transitions. [2020-12-09 09:09:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:33,996 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 5 [2020-12-09 09:09:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:34,003 INFO L225 Difference]: With dead ends: 103 [2020-12-09 09:09:34,003 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 09:09:34,004 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:34,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 09:09:34,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 83. [2020-12-09 09:09:34,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-09 09:09:34,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 125 transitions. [2020-12-09 09:09:34,031 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 125 transitions. Word has length 5 [2020-12-09 09:09:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:34,031 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 125 transitions. [2020-12-09 09:09:34,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:34,031 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 125 transitions. [2020-12-09 09:09:34,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:09:34,032 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:34,032 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:09:34,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 09:09:34,233 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:34,234 INFO L82 PathProgramCache]: Analyzing trace with hash 889747453, now seen corresponding path program 1 times [2020-12-09 09:09:34,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:34,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [596840253] [2020-12-09 09:09:34,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:34,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2020-12-09 09:09:34,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:34,285 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:34,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [596840253] [2020-12-09 09:09:34,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:34,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:34,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029002529] [2020-12-09 09:09:34,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:34,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:34,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:34,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:34,288 INFO L87 Difference]: Start difference. First operand 83 states and 125 transitions. Second operand 3 states. [2020-12-09 09:09:34,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:34,395 INFO L93 Difference]: Finished difference Result 155 states and 235 transitions. [2020-12-09 09:09:34,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:34,396 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:09:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:34,397 INFO L225 Difference]: With dead ends: 155 [2020-12-09 09:09:34,398 INFO L226 Difference]: Without dead ends: 152 [2020-12-09 09:09:34,398 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:34,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-09 09:09:34,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 132. [2020-12-09 09:09:34,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-09 09:09:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 221 transitions. [2020-12-09 09:09:34,409 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 221 transitions. Word has length 6 [2020-12-09 09:09:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:34,409 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 221 transitions. [2020-12-09 09:09:34,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 221 transitions. [2020-12-09 09:09:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:09:34,410 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:34,410 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:09:34,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 09:09:34,612 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:34,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:34,614 INFO L82 PathProgramCache]: Analyzing trace with hash 889692424, now seen corresponding path program 1 times [2020-12-09 09:09:34,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:34,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [694358450] [2020-12-09 09:09:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:34,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2020-12-09 09:09:34,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:34,753 INFO L382 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 [2020-12-09 09:09:34,754 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:09:34,756 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:09:34,757 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:09:34,757 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 09:09:34,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:34,761 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:34,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [694358450] [2020-12-09 09:09:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847679578] [2020-12-09 09:09:34,762 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:34,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:34,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:34,762 INFO L87 Difference]: Start difference. First operand 132 states and 221 transitions. Second operand 3 states. [2020-12-09 09:09:34,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:34,889 INFO L93 Difference]: Finished difference Result 199 states and 318 transitions. [2020-12-09 09:09:34,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:34,890 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:09:34,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:34,892 INFO L225 Difference]: With dead ends: 199 [2020-12-09 09:09:34,892 INFO L226 Difference]: Without dead ends: 199 [2020-12-09 09:09:34,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-09 09:09:34,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2020-12-09 09:09:34,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-09 09:09:34,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 304 transitions. [2020-12-09 09:09:34,910 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 304 transitions. Word has length 6 [2020-12-09 09:09:34,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:34,911 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 304 transitions. [2020-12-09 09:09:34,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:34,911 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 304 transitions. [2020-12-09 09:09:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 09:09:34,911 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:34,911 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 09:09:35,112 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 09:09:35,114 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:35,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:35,116 INFO L82 PathProgramCache]: Analyzing trace with hash 889692425, now seen corresponding path program 1 times [2020-12-09 09:09:35,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:35,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1912702984] [2020-12-09 09:09:35,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:35,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:35,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 5 conjunts are in the unsatisfiable core [2020-12-09 09:09:35,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:35,262 INFO L382 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 [2020-12-09 09:09:35,263 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 09:09:35,268 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 09:09:35,269 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 09:09:35,269 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 09:09:35,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:35,277 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:35,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1912702984] [2020-12-09 09:09:35,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:35,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 09:09:35,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940080114] [2020-12-09 09:09:35,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-12-09 09:09:35,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:35,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-12-09 09:09:35,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:35,278 INFO L87 Difference]: Start difference. First operand 178 states and 304 transitions. Second operand 3 states. [2020-12-09 09:09:35,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:35,394 INFO L93 Difference]: Finished difference Result 194 states and 309 transitions. [2020-12-09 09:09:35,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-12-09 09:09:35,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 6 [2020-12-09 09:09:35,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:35,396 INFO L225 Difference]: With dead ends: 194 [2020-12-09 09:09:35,396 INFO L226 Difference]: Without dead ends: 194 [2020-12-09 09:09:35,396 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-12-09 09:09:35,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-12-09 09:09:35,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 176. [2020-12-09 09:09:35,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-09 09:09:35,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 296 transitions. [2020-12-09 09:09:35,408 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 296 transitions. Word has length 6 [2020-12-09 09:09:35,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:35,408 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 296 transitions. [2020-12-09 09:09:35,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-12-09 09:09:35,408 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 296 transitions. [2020-12-09 09:09:35,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2020-12-09 09:09:35,408 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:35,409 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:35,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 09:09:35,611 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:35,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:35,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1810669365, now seen corresponding path program 1 times [2020-12-09 09:09:35,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:35,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [629593285] [2020-12-09 09:09:35,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 09:09:35,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:35,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:35,777 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:35,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [629593285] [2020-12-09 09:09:35,777 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:35,777 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:09:35,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478214334] [2020-12-09 09:09:35,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:09:35,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:35,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:09:35,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:09:35,778 INFO L87 Difference]: Start difference. First operand 176 states and 296 transitions. Second operand 4 states. [2020-12-09 09:09:35,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:35,808 INFO L93 Difference]: Finished difference Result 226 states and 319 transitions. [2020-12-09 09:09:35,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:09:35,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2020-12-09 09:09:35,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:35,810 INFO L225 Difference]: With dead ends: 226 [2020-12-09 09:09:35,810 INFO L226 Difference]: Without dead ends: 226 [2020-12-09 09:09:35,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:09:35,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-09 09:09:35,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 134. [2020-12-09 09:09:35,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-09 09:09:35,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 219 transitions. [2020-12-09 09:09:35,816 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 219 transitions. Word has length 7 [2020-12-09 09:09:35,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:35,816 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 219 transitions. [2020-12-09 09:09:35,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:09:35,816 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 219 transitions. [2020-12-09 09:09:35,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-09 09:09:35,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:35,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:36,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 09:09:36,018 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:36,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:36,019 INFO L82 PathProgramCache]: Analyzing trace with hash 346576936, now seen corresponding path program 1 times [2020-12-09 09:09:36,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:36,021 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [546508846] [2020-12-09 09:09:36,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:36,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:36,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 09:09:36,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:36,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,166 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 09:09:36,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [546508846] [2020-12-09 09:09:36,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 09:09:36,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 09:09:36,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209302175] [2020-12-09 09:09:36,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 09:09:36,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:36,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 09:09:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 09:09:36,167 INFO L87 Difference]: Start difference. First operand 134 states and 219 transitions. Second operand 4 states. [2020-12-09 09:09:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:36,200 INFO L93 Difference]: Finished difference Result 251 states and 398 transitions. [2020-12-09 09:09:36,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 09:09:36,201 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2020-12-09 09:09:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:36,202 INFO L225 Difference]: With dead ends: 251 [2020-12-09 09:09:36,202 INFO L226 Difference]: Without dead ends: 251 [2020-12-09 09:09:36,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 09:09:36,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-09 09:09:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 178. [2020-12-09 09:09:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-09 09:09:36,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 288 transitions. [2020-12-09 09:09:36,207 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 288 transitions. Word has length 8 [2020-12-09 09:09:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:36,207 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 288 transitions. [2020-12-09 09:09:36,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 09:09:36,208 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 288 transitions. [2020-12-09 09:09:36,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:09:36,208 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:36,208 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:36,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 09:09:36,410 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:36,411 INFO L82 PathProgramCache]: Analyzing trace with hash 212840816, now seen corresponding path program 1 times [2020-12-09 09:09:36,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:36,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1915525663] [2020-12-09 09:09:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:36,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:36,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:09:36,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:36,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,568 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:09:36,589 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1915525663] [2020-12-09 09:09:36,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1605188865] [2020-12-09 09:09:36,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/bin/utaipan/cvc4 Starting monitored process 9 with cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with cvc4 --incremental --print-success --lang smt [2020-12-09 09:09:36,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:36,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 09:09:36,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:36,672 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,672 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:09:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,692 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310958573] [2020-12-09 09:09:36,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 09:09:36,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 09:09:36,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 09:09:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,747 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-12-09 09:09:36,781 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 09:09:36,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-12-09 09:09:36,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 9 [2020-12-09 09:09:36,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57500548] [2020-12-09 09:09:36,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-09 09:09:36,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 09:09:36,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-09 09:09:36,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-12-09 09:09:36,782 INFO L87 Difference]: Start difference. First operand 178 states and 288 transitions. Second operand 10 states. [2020-12-09 09:09:36,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 09:09:36,975 INFO L93 Difference]: Finished difference Result 709 states and 1136 transitions. [2020-12-09 09:09:36,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-09 09:09:36,975 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 11 [2020-12-09 09:09:36,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 09:09:36,978 INFO L225 Difference]: With dead ends: 709 [2020-12-09 09:09:36,978 INFO L226 Difference]: Without dead ends: 709 [2020-12-09 09:09:36,979 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-12-09 09:09:36,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2020-12-09 09:09:36,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 388. [2020-12-09 09:09:36,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 388 states. [2020-12-09 09:09:36,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 640 transitions. [2020-12-09 09:09:36,989 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 640 transitions. Word has length 11 [2020-12-09 09:09:36,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 09:09:36,989 INFO L481 AbstractCegarLoop]: Abstraction has 388 states and 640 transitions. [2020-12-09 09:09:36,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-09 09:09:36,989 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 640 transitions. [2020-12-09 09:09:36,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 09:09:36,989 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 09:09:36,989 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 09:09:37,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 cvc4 --incremental --print-success --lang smt,8 mathsat -unsat_core_generation=3,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-09 09:09:37,593 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr16ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr19ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr17ASSERT_VIOLATIONMEMORY_FREE, ULTIMATE.startErr8REQUIRES_VIOLATION]=== [2020-12-09 09:09:37,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 09:09:37,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1598757208, now seen corresponding path program 1 times [2020-12-09 09:09:37,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 09:09:37,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2115358935] [2020-12-09 09:09:37,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_0aa06c31-b0ae-4761-91b9-0d1b2bd20b83/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 [2020-12-09 09:09:37,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:09:37,658 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:09:37,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 09:09:37,684 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 09:09:37,710 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 09:09:37,710 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 09:09:37,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 09:09:37,933 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 09:09:37 BoogieIcfgContainer [2020-12-09 09:09:37,933 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 09:09:37,934 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 09:09:37,934 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 09:09:37,934 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 09:09:37,934 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 09:09:33" (3/4) ... [2020-12-09 09:09:37,936 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 09:09:37,936 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 09:09:37,937 INFO L168 Benchmark]: Toolchain (without parser) took 5087.96 ms. Allocated memory was 48.2 MB in the beginning and 86.0 MB in the end (delta: 37.7 MB). Free memory was 23.2 MB in the beginning and 34.2 MB in the end (delta: -11.0 MB). Peak memory consumption was 26.8 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,938 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:09:37,938 INFO L168 Benchmark]: CACSL2BoogieTranslator took 337.26 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.0 MB in the beginning and 38.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,938 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 58.7 MB. Free memory was 38.8 MB in the beginning and 36.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,939 INFO L168 Benchmark]: Boogie Preprocessor took 24.58 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 34.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,939 INFO L168 Benchmark]: RCFGBuilder took 482.39 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 34.7 MB in the beginning and 46.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,940 INFO L168 Benchmark]: TraceAbstraction took 4200.48 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 45.4 MB in the beginning and 34.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. [2020-12-09 09:09:37,940 INFO L168 Benchmark]: Witness Printer took 2.69 ms. Allocated memory is still 86.0 MB. Free memory is still 34.2 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 09:09:37,942 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 48.2 MB. Free memory was 31.1 MB in the beginning and 31.0 MB in the end (delta: 70.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 337.26 ms. Allocated memory was 48.2 MB in the beginning and 58.7 MB in the end (delta: 10.5 MB). Free memory was 23.0 MB in the beginning and 38.8 MB in the end (delta: -15.9 MB). Peak memory consumption was 6.1 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 35.27 ms. Allocated memory is still 58.7 MB. Free memory was 38.8 MB in the beginning and 36.5 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.58 ms. Allocated memory is still 58.7 MB. Free memory was 36.5 MB in the beginning and 34.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 482.39 ms. Allocated memory was 58.7 MB in the beginning and 71.3 MB in the end (delta: 12.6 MB). Free memory was 34.7 MB in the beginning and 46.0 MB in the end (delta: -11.3 MB). Peak memory consumption was 10.1 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4200.48 ms. Allocated memory was 71.3 MB in the beginning and 86.0 MB in the end (delta: 14.7 MB). Free memory was 45.4 MB in the beginning and 34.2 MB in the end (delta: 11.2 MB). Peak memory consumption was 25.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.69 ms. Allocated memory is still 86.0 MB. Free memory is still 34.2 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 592]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 592. Possible FailurePath: [L528] struct cell *S; [L529] int pc1 = 1; [L530] int pc4 = 1; [L531] static struct cell *t1 = ((void *)0); [L532] static struct cell *x1 = ((void *)0); [L561] struct cell* garbage; [L562] static struct cell *t4 = ((void *)0); [L563] static struct cell *x4 = ((void *)0); [L566] static int res4; VAL [garbage={0:0}, pc1=1, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] [L594] COND TRUE S || 1 != pc4 || __VERIFIER_nondet_int() [L595] COND TRUE __VERIFIER_nondet_int() [L535] pc1++ [L536] case 1: [L537] x1 = malloc(sizeof(*x1)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L538] x1->data = 0 VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L539] x1->next = ((void *)0) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L594] COND FALSE !(S || 1 != pc4 || __VERIFIER_nondet_int()) [L600] COND FALSE !(\read(*garbage)) VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={1:0}, x4={0:0}] [L605] S = ((void *)0) [L606] t1 = ((void *)0) [L607] x1 = ((void *)0) [L608] t4 = ((void *)0) [L609] x4 = ((void *)0) [L610] return !!garbage; VAL [garbage={0:0}, pc1=2, pc4=1, res4=0, S={0:0}, t1={0:0}, t4={0:0}, x1={0:0}, x4={0:0}] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 60 locations, 20 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 4.1s, OverallIterations: 8, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 779 SDtfs, 930 SDslu, 1026 SDs, 0 SdLazy, 283 SolverSat, 67 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 104 GetRequests, 75 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=388occurred in iteration=7, 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, 563 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.3s InterpolantComputationTime, 82 NumberOfCodeBlocks, 82 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 92 ConstructedInterpolants, 0 QuantifiedInterpolants, 2086 SizeOfPredicates, 14 NumberOfNonLiveVariables, 437 ConjunctsInSsa, 40 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 0/18 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...