./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list_flag-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_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 e2748dac41bc6cdd06fa5d8793326edbc7d40c79 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list_flag-2.i -s /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 e2748dac41bc6cdd06fa5d8793326edbc7d40c79 ................................................................................................................................................................................................................................................................................................................................................................................................................................................................. 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 19:31:08,656 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 19:31:08,657 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 19:31:08,687 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 19:31:08,693 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:31:08,694 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:31:08,696 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:31:08,699 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:31:08,701 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:31:08,702 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:31:08,703 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:31:08,704 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:31:08,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:31:08,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:31:08,707 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:31:08,708 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:31:08,709 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:31:08,710 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:31:08,712 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:31:08,714 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:31:08,716 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:31:08,718 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:31:08,719 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:31:08,719 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:31:08,723 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:31:08,723 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:31:08,723 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:31:08,724 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:31:08,725 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:31:08,726 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:31:08,726 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:31:08,727 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:31:08,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:31:08,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:31:08,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:31:08,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:31:08,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:31:08,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:31:08,730 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:31:08,730 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:31:08,731 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:31:08,732 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 19:31:08,748 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:31:08,748 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:31:08,749 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:31:08,749 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:31:08,749 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 19:31:08,750 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 19:31:08,750 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:31:08,750 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 19:31:08,750 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 19:31:08,750 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 19:31:08,751 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 19:31:08,751 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:31:08,751 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:31:08,752 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:31:08,752 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:31:08,753 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:31:08,753 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:31:08,754 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_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2748dac41bc6cdd06fa5d8793326edbc7d40c79 [2020-12-09 19:31:08,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:31:08,935 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:31:08,937 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:31:08,938 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:31:08,939 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:31:08,939 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/../../sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-09 19:31:08,984 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/e546c7f53/e31d918fd98b4cb483defd5a25ed2ec0/FLAG5f4689125 [2020-12-09 19:31:09,405 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:31:09,406 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-09 19:31:09,416 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/e546c7f53/e31d918fd98b4cb483defd5a25ed2ec0/FLAG5f4689125 [2020-12-09 19:31:09,426 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/e546c7f53/e31d918fd98b4cb483defd5a25ed2ec0 [2020-12-09 19:31:09,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:31:09,428 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:31:09,430 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:31:09,430 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:31:09,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:31:09,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,435 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b0d9118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09, skipping insertion in model container [2020-12-09 19:31:09,435 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,440 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:31:09,473 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:31:09,678 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-09 19:31:09,680 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:31:09,688 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:31:09,718 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-09 19:31:09,718 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:31:09,755 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:31:09,755 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09 WrapperNode [2020-12-09 19:31:09,755 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:31:09,756 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:31:09,756 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:31:09,756 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:31:09,763 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,777 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,794 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:31:09,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:31:09,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:31:09,795 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:31:09,801 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,804 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,804 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,810 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,813 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,815 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... [2020-12-09 19:31:09,817 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:31:09,817 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:31:09,818 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:31:09,818 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:31:09,819 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 19:31:09,880 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:31:09,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:31:10,159 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:31:10,159 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 19:31:10,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:10 BoogieIcfgContainer [2020-12-09 19:31:10,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:31:10,162 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:31:10,162 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:31:10,164 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:31:10,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:31:09" (1/3) ... [2020-12-09 19:31:10,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152184aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:10, skipping insertion in model container [2020-12-09 19:31:10,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:09" (2/3) ... [2020-12-09 19:31:10,165 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@152184aa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:10, skipping insertion in model container [2020-12-09 19:31:10,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:10" (3/3) ... [2020-12-09 19:31:10,166 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-12-09 19:31:10,179 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:31:10,182 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-12-09 19:31:10,188 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-12-09 19:31:10,201 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:31:10,201 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 19:31:10,201 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:31:10,201 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:31:10,202 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:31:10,205 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:31:10,205 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:31:10,205 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:31:10,215 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states. [2020-12-09 19:31:10,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2020-12-09 19:31:10,219 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,219 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2020-12-09 19:31:10,220 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,224 INFO L82 PathProgramCache]: Analyzing trace with hash 4495207, now seen corresponding path program 1 times [2020-12-09 19:31:10,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062400593] [2020-12-09 19:31:10,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,329 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 19:31:10,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062400593] [2020-12-09 19:31:10,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:31:10,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98243034] [2020-12-09 19:31:10,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:31:10,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:31:10,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:31:10,344 INFO L87 Difference]: Start difference. First operand 48 states. Second operand 2 states. [2020-12-09 19:31:10,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:10,354 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2020-12-09 19:31:10,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:31:10,355 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 4 [2020-12-09 19:31:10,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:10,360 INFO L225 Difference]: With dead ends: 48 [2020-12-09 19:31:10,360 INFO L226 Difference]: Without dead ends: 45 [2020-12-09 19:31:10,361 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 19:31:10,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-09 19:31:10,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-12-09 19:31:10,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-09 19:31:10,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-12-09 19:31:10,385 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 4 [2020-12-09 19:31:10,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:10,385 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-12-09 19:31:10,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:31:10,386 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-12-09 19:31:10,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:31:10,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,386 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:31:10,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 19:31:10,386 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,387 INFO L82 PathProgramCache]: Analyzing trace with hash 139317741, now seen corresponding path program 1 times [2020-12-09 19:31:10,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690817477] [2020-12-09 19:31:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,430 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 19:31:10,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690817477] [2020-12-09 19:31:10,430 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:31:10,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305378946] [2020-12-09 19:31:10,431 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:31:10,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:31:10,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:31:10,433 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 4 states. [2020-12-09 19:31:10,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:10,520 INFO L93 Difference]: Finished difference Result 53 states and 59 transitions. [2020-12-09 19:31:10,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:31:10,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 19:31:10,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:10,522 INFO L225 Difference]: With dead ends: 53 [2020-12-09 19:31:10,522 INFO L226 Difference]: Without dead ends: 53 [2020-12-09 19:31:10,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:10,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-09 19:31:10,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-09 19:31:10,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-09 19:31:10,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-12-09 19:31:10,528 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 5 [2020-12-09 19:31:10,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:10,528 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-12-09 19:31:10,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:31:10,528 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-12-09 19:31:10,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 19:31:10,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 19:31:10,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 19:31:10,528 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,529 INFO L82 PathProgramCache]: Analyzing trace with hash 139317742, now seen corresponding path program 1 times [2020-12-09 19:31:10,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886321924] [2020-12-09 19:31:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,572 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 19:31:10,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886321924] [2020-12-09 19:31:10,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:31:10,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579709076] [2020-12-09 19:31:10,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:31:10,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:31:10,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:31:10,573 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-12-09 19:31:10,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:10,642 INFO L93 Difference]: Finished difference Result 62 states and 69 transitions. [2020-12-09 19:31:10,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:31:10,643 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 19:31:10,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:10,643 INFO L225 Difference]: With dead ends: 62 [2020-12-09 19:31:10,644 INFO L226 Difference]: Without dead ends: 62 [2020-12-09 19:31:10,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:10,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-09 19:31:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 57. [2020-12-09 19:31:10,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-09 19:31:10,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 65 transitions. [2020-12-09 19:31:10,648 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 65 transitions. Word has length 5 [2020-12-09 19:31:10,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:10,648 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 65 transitions. [2020-12-09 19:31:10,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:31:10,648 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 65 transitions. [2020-12-09 19:31:10,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:31:10,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,649 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:10,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 19:31:10,649 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,650 INFO L82 PathProgramCache]: Analyzing trace with hash -941939298, now seen corresponding path program 1 times [2020-12-09 19:31:10,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108146691] [2020-12-09 19:31:10,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,691 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:10,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108146691] [2020-12-09 19:31:10,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:31:10,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050200983] [2020-12-09 19:31:10,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:31:10,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:31:10,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:10,692 INFO L87 Difference]: Start difference. First operand 57 states and 65 transitions. Second operand 5 states. [2020-12-09 19:31:10,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:10,768 INFO L93 Difference]: Finished difference Result 74 states and 82 transitions. [2020-12-09 19:31:10,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:31:10,769 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 19:31:10,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:10,770 INFO L225 Difference]: With dead ends: 74 [2020-12-09 19:31:10,770 INFO L226 Difference]: Without dead ends: 74 [2020-12-09 19:31:10,770 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:31:10,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-09 19:31:10,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 60. [2020-12-09 19:31:10,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 19:31:10,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-09 19:31:10,775 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 10 [2020-12-09 19:31:10,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:10,775 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-09 19:31:10,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:31:10,775 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-09 19:31:10,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-09 19:31:10,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,775 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:10,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 19:31:10,776 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,776 INFO L82 PathProgramCache]: Analyzing trace with hash -921899452, now seen corresponding path program 1 times [2020-12-09 19:31:10,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50805448] [2020-12-09 19:31:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,815 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 19:31:10,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50805448] [2020-12-09 19:31:10,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:31:10,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475994095] [2020-12-09 19:31:10,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:31:10,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:31:10,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:10,817 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 5 states. [2020-12-09 19:31:10,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:10,899 INFO L93 Difference]: Finished difference Result 73 states and 80 transitions. [2020-12-09 19:31:10,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:31:10,899 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2020-12-09 19:31:10,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:10,900 INFO L225 Difference]: With dead ends: 73 [2020-12-09 19:31:10,900 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 19:31:10,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:31:10,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 19:31:10,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-12-09 19:31:10,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-09 19:31:10,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 71 transitions. [2020-12-09 19:31:10,904 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 71 transitions. Word has length 10 [2020-12-09 19:31:10,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:10,904 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 71 transitions. [2020-12-09 19:31:10,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:31:10,905 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 71 transitions. [2020-12-09 19:31:10,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 19:31:10,905 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:10,905 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:10,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 19:31:10,905 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:10,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:10,906 INFO L82 PathProgramCache]: Analyzing trace with hash 864575346, now seen corresponding path program 1 times [2020-12-09 19:31:10,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:10,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653093845] [2020-12-09 19:31:10,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:10,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:10,942 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 19:31:10,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653093845] [2020-12-09 19:31:10,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:10,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 19:31:10,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982435673] [2020-12-09 19:31:10,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 19:31:10,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 19:31:10,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 19:31:10,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:10,944 INFO L87 Difference]: Start difference. First operand 62 states and 71 transitions. Second operand 5 states. [2020-12-09 19:31:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:11,016 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-12-09 19:31:11,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 19:31:11,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 19:31:11,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:11,018 INFO L225 Difference]: With dead ends: 71 [2020-12-09 19:31:11,018 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 19:31:11,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-09 19:31:11,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 19:31:11,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 64. [2020-12-09 19:31:11,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-09 19:31:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 73 transitions. [2020-12-09 19:31:11,022 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 73 transitions. Word has length 11 [2020-12-09 19:31:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:11,022 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 73 transitions. [2020-12-09 19:31:11,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 19:31:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 73 transitions. [2020-12-09 19:31:11,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 19:31:11,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:11,023 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:11,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 19:31:11,023 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:11,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:11,023 INFO L82 PathProgramCache]: Analyzing trace with hash 864575506, now seen corresponding path program 1 times [2020-12-09 19:31:11,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 19:31:11,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323793668] [2020-12-09 19:31:11,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 19:31:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:31:11,038 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:31:11,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:31:11,050 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:31:11,065 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 19:31:11,065 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:31:11,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 19:31:11,081 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:31:11 BoogieIcfgContainer [2020-12-09 19:31:11,081 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:31:11,081 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:31:11,081 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:31:11,081 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:31:11,082 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:10" (3/4) ... [2020-12-09 19:31:11,084 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 19:31:11,084 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:31:11,085 INFO L168 Benchmark]: Toolchain (without parser) took 1655.66 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 76.4 MB in the beginning and 65.9 MB in the end (delta: 10.5 MB). Peak memory consumption was 35.3 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,085 INFO L168 Benchmark]: CDTParser took 3.43 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 93.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,086 INFO L168 Benchmark]: CACSL2BoogieTranslator took 325.82 ms. Allocated memory is still 113.2 MB. Free memory was 76.0 MB in the beginning and 76.3 MB in the end (delta: -315.0 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,086 INFO L168 Benchmark]: Boogie Procedure Inliner took 38.27 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 74.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,087 INFO L168 Benchmark]: Boogie Preprocessor took 22.19 ms. Allocated memory is still 113.2 MB. Free memory was 74.7 MB in the beginning and 73.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:31:11,087 INFO L168 Benchmark]: RCFGBuilder took 343.24 ms. Allocated memory is still 113.2 MB. Free memory was 73.2 MB in the beginning and 44.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,088 INFO L168 Benchmark]: TraceAbstraction took 919.13 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 44.8 MB in the beginning and 65.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:11,088 INFO L168 Benchmark]: Witness Printer took 2.65 ms. Allocated memory is still 138.4 MB. Free memory is still 65.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:31:11,090 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.43 ms. Allocated memory is still 113.2 MB. Free memory was 85.3 MB in the beginning and 93.7 MB in the end (delta: -8.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 325.82 ms. Allocated memory is still 113.2 MB. Free memory was 76.0 MB in the beginning and 76.3 MB in the end (delta: -315.0 kB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 38.27 ms. Allocated memory is still 113.2 MB. Free memory was 76.3 MB in the beginning and 74.7 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.19 ms. Allocated memory is still 113.2 MB. Free memory was 74.7 MB in the beginning and 73.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 343.24 ms. Allocated memory is still 113.2 MB. Free memory was 73.2 MB in the beginning and 44.8 MB in the end (delta: 28.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 919.13 ms. Allocated memory was 113.2 MB in the beginning and 138.4 MB in the end (delta: 25.2 MB). Free memory was 44.8 MB in the beginning and 65.9 MB in the end (delta: -21.1 MB). Peak memory consumption was 6.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.65 ms. Allocated memory is still 138.4 MB. Free memory is still 65.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 48 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 0.8s, OverallIterations: 7, TraceHistogramMax: 1, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 191 SDtfs, 281 SDslu, 214 SDs, 0 SdLazy, 320 SolverSat, 51 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=64occurred in iteration=6, 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, 6 MinimizatonAttempts, 42 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 56 NumberOfCodeBlocks, 56 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 39 ConstructedInterpolants, 0 QuantifiedInterpolants, 1511 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 2/2 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 19:31:12,743 INFO L177 SettingsManager]: Resetting all preferences to default values... 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[2020-12-09 19:31:12,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 19:31:12,767 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 19:31:12,768 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 19:31:12,770 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 19:31:12,772 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 19:31:12,773 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 19:31:12,773 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 19:31:12,778 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 19:31:12,779 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 19:31:12,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 19:31:12,781 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 19:31:12,782 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 19:31:12,783 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 19:31:12,784 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 19:31:12,785 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 19:31:12,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 19:31:12,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 19:31:12,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 19:31:12,791 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 19:31:12,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 19:31:12,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 19:31:12,795 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 19:31:12,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 19:31:12,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 19:31:12,796 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 19:31:12,797 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 19:31:12,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 19:31:12,798 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 19:31:12,799 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 19:31:12,800 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 19:31:12,801 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 19:31:12,801 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 19:31:12,802 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 19:31:12,802 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 19:31:12,802 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 19:31:12,803 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 19:31:12,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 19:31:12,804 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 19:31:12,821 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 19:31:12,821 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 19:31:12,822 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 19:31:12,822 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 19:31:12,822 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 19:31:12,823 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 19:31:12,823 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 19:31:12,823 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 19:31:12,823 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 19:31:12,823 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 19:31:12,824 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 19:31:12,824 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 19:31:12,824 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 19:31:12,824 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 19:31:12,824 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 19:31:12,825 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 19:31:12,826 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 19:31:12,826 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 19:31:12,827 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 19:31:12,827 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 19:31:12,827 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 19:31:12,827 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 19:31:12,827 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 19:31:12,827 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 19:31:12,827 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_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> e2748dac41bc6cdd06fa5d8793326edbc7d40c79 [2020-12-09 19:31:13,061 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 19:31:13,077 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 19:31:13,079 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 19:31:13,080 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 19:31:13,081 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 19:31:13,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/../../sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-09 19:31:13,131 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/14cfa09a8/b6d476b07aaa4bc8a2e07e2445bc0fe9/FLAG2daf06590 [2020-12-09 19:31:13,560 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 19:31:13,560 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i [2020-12-09 19:31:13,569 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/14cfa09a8/b6d476b07aaa4bc8a2e07e2445bc0fe9/FLAG2daf06590 [2020-12-09 19:31:13,578 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/bin/utaipan/data/14cfa09a8/b6d476b07aaa4bc8a2e07e2445bc0fe9 [2020-12-09 19:31:13,580 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 19:31:13,581 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 19:31:13,582 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 19:31:13,582 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 19:31:13,585 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 19:31:13,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,587 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3100337b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13, skipping insertion in model container [2020-12-09 19:31:13,587 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,594 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 19:31:13,625 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 19:31:13,847 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-09 19:31:13,849 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:31:13,862 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 19:31:13,895 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/sv-benchmarks/c/list-properties/list_flag-2.i[23375,23388] [2020-12-09 19:31:13,896 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 19:31:13,939 INFO L208 MainTranslator]: Completed translation [2020-12-09 19:31:13,940 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13 WrapperNode [2020-12-09 19:31:13,940 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 19:31:13,941 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 19:31:13,941 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 19:31:13,941 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 19:31:13,946 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,960 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,975 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 19:31:13,976 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 19:31:13,976 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 19:31:13,976 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 19:31:13,983 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,983 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,986 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:13,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... [2020-12-09 19:31:14,001 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 19:31:14,002 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 19:31:14,002 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 19:31:14,002 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 19:31:14,003 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 19:31:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 19:31:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 19:31:14,075 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 19:31:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 19:31:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 19:31:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 19:31:14,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 19:31:14,076 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 19:31:14,464 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 19:31:14,464 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2020-12-09 19:31:14,465 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:14 BoogieIcfgContainer [2020-12-09 19:31:14,466 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 19:31:14,467 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 19:31:14,467 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 19:31:14,470 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 19:31:14,470 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 07:31:13" (1/3) ... [2020-12-09 19:31:14,471 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9335ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:14, skipping insertion in model container [2020-12-09 19:31:14,471 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 07:31:13" (2/3) ... [2020-12-09 19:31:14,472 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@e9335ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 07:31:14, skipping insertion in model container [2020-12-09 19:31:14,472 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:14" (3/3) ... [2020-12-09 19:31:14,473 INFO L111 eAbstractionObserver]: Analyzing ICFG list_flag-2.i [2020-12-09 19:31:14,485 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 19:31:14,488 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 22 error locations. [2020-12-09 19:31:14,498 INFO L253 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2020-12-09 19:31:14,513 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 19:31:14,513 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 19:31:14,513 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 19:31:14,513 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 19:31:14,513 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 19:31:14,513 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 19:31:14,513 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 19:31:14,513 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 19:31:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-12-09 19:31:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:31:14,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:14,528 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:31:14,528 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:14,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:14,532 INFO L82 PathProgramCache]: Analyzing trace with hash 889600200, now seen corresponding path program 1 times [2020-12-09 19:31:14,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:14,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [27088073] [2020-12-09 19:31:14,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:14,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:14,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 1 conjunts are in the unsatisfiable core [2020-12-09 19:31:14,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:14,611 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 19:31:14,611 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:31:14,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [27088073] [2020-12-09 19:31:14,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:14,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 19:31:14,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193954290] [2020-12-09 19:31:14,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 19:31:14,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:14,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 19:31:14,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 19:31:14,630 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 2 states. [2020-12-09 19:31:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:14,640 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2020-12-09 19:31:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 19:31:14,641 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2020-12-09 19:31:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:14,647 INFO L225 Difference]: With dead ends: 54 [2020-12-09 19:31:14,647 INFO L226 Difference]: Without dead ends: 50 [2020-12-09 19:31:14,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 5 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 19:31:14,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-09 19:31:14,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-12-09 19:31:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 19:31:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-12-09 19:31:14,675 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 6 [2020-12-09 19:31:14,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:14,675 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-12-09 19:31:14,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 19:31:14,675 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-12-09 19:31:14,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:31:14,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:14,676 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:31:14,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 19:31:14,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:14,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:14,877 INFO L82 PathProgramCache]: Analyzing trace with hash 889599239, now seen corresponding path program 1 times [2020-12-09 19:31:14,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:14,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1527327088] [2020-12-09 19:31:14,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:14,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 19:31:14,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:14,943 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 19:31:14,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 19:31:14,948 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 19:31:14,949 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 19:31:14,949 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 19:31:14,962 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 19:31:14,962 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:31:14,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1527327088] [2020-12-09 19:31:14,962 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:14,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:31:14,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734846005] [2020-12-09 19:31:14,963 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:31:14,963 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:14,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:31:14,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:31:14,964 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 4 states. [2020-12-09 19:31:15,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:15,138 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2020-12-09 19:31:15,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:31:15,139 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 19:31:15,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:15,140 INFO L225 Difference]: With dead ends: 57 [2020-12-09 19:31:15,141 INFO L226 Difference]: Without dead ends: 57 [2020-12-09 19:31:15,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:15,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-12-09 19:31:15,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 52. [2020-12-09 19:31:15,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 19:31:15,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2020-12-09 19:31:15,146 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 6 [2020-12-09 19:31:15,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:15,147 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2020-12-09 19:31:15,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:31:15,147 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2020-12-09 19:31:15,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 19:31:15,147 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:15,147 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 19:31:15,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 19:31:15,350 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash 889599240, now seen corresponding path program 1 times [2020-12-09 19:31:15,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:15,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1990700348] [2020-12-09 19:31:15,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:15,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:31:15,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:15,418 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 19:31:15,419 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 19:31:15,424 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 19:31:15,425 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 19:31:15,425 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 19:31:15,448 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 19:31:15,449 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:31:15,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1990700348] [2020-12-09 19:31:15,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:15,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 19:31:15,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982769803] [2020-12-09 19:31:15,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 19:31:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:15,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 19:31:15,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 19:31:15,450 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand 4 states. [2020-12-09 19:31:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:15,673 INFO L93 Difference]: Finished difference Result 70 states and 77 transitions. [2020-12-09 19:31:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 19:31:15,673 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 19:31:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:15,674 INFO L225 Difference]: With dead ends: 70 [2020-12-09 19:31:15,674 INFO L226 Difference]: Without dead ends: 70 [2020-12-09 19:31:15,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-09 19:31:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-09 19:31:15,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 61. [2020-12-09 19:31:15,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-12-09 19:31:15,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-12-09 19:31:15,679 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 6 [2020-12-09 19:31:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:15,679 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-12-09 19:31:15,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 19:31:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-12-09 19:31:15,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 19:31:15,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:15,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:15,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 19:31:15,881 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:15,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1669336427, now seen corresponding path program 1 times [2020-12-09 19:31:15,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:15,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [453700367] [2020-12-09 19:31:15,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 19:31:15,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 19:31:15,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 19:31:15,997 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2020-12-09 19:31:15,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 19:31:16,000 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 19:31:16,000 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 19:31:16,001 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 19:31:16,028 INFO L382 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2020-12-09 19:31:16,030 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 19:31:16,031 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 19:31:16,032 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 19:31:16,032 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-12-09 19:31:16,039 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 19:31:16,040 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 19:31:16,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [453700367] [2020-12-09 19:31:16,040 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 19:31:16,040 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 19:31:16,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366034110] [2020-12-09 19:31:16,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 19:31:16,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 19:31:16,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 19:31:16,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 19:31:16,041 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 6 states. [2020-12-09 19:31:16,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 19:31:16,297 INFO L93 Difference]: Finished difference Result 104 states and 114 transitions. [2020-12-09 19:31:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 19:31:16,297 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 19:31:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 19:31:16,299 INFO L225 Difference]: With dead ends: 104 [2020-12-09 19:31:16,299 INFO L226 Difference]: Without dead ends: 104 [2020-12-09 19:31:16,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-12-09 19:31:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-09 19:31:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 69. [2020-12-09 19:31:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-09 19:31:16,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 80 transitions. [2020-12-09 19:31:16,306 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 80 transitions. Word has length 13 [2020-12-09 19:31:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 19:31:16,306 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 80 transitions. [2020-12-09 19:31:16,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 19:31:16,307 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 80 transitions. [2020-12-09 19:31:16,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 19:31:16,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 19:31:16,307 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 19:31:16,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 19:31:16,509 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr21ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr20ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 19:31:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 19:31:16,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1669336267, now seen corresponding path program 1 times [2020-12-09 19:31:16,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 19:31:16,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [713243264] [2020-12-09 19:31:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_fe735905-3b2e-4462-bfb9-6665a4d4d14e/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 19:31:16,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:31:16,611 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:31:16,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 19:31:16,634 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 19:31:16,659 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 19:31:16,659 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 19:31:16,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 19:31:16,913 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 07:31:16 BoogieIcfgContainer [2020-12-09 19:31:16,913 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 19:31:16,913 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 19:31:16,914 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 19:31:16,914 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 19:31:16,914 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 07:31:14" (3/4) ... [2020-12-09 19:31:16,916 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 19:31:16,916 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 19:31:16,917 INFO L168 Benchmark]: Toolchain (without parser) took 3335.70 ms. Allocated memory was 52.4 MB in the beginning and 79.7 MB in the end (delta: 27.3 MB). Free memory was 29.0 MB in the beginning and 32.0 MB in the end (delta: -3.0 MB). Peak memory consumption was 23.9 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:16,918 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 52.4 MB. Free memory is still 34.4 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:31:16,918 INFO L168 Benchmark]: CACSL2BoogieTranslator took 358.00 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.9 MB in the beginning and 35.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:16,919 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.95 ms. Allocated memory is still 65.0 MB. Free memory was 35.3 MB in the beginning and 33.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:16,919 INFO L168 Benchmark]: Boogie Preprocessor took 25.35 ms. Allocated memory is still 65.0 MB. Free memory was 33.2 MB in the beginning and 31.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:31:16,920 INFO L168 Benchmark]: RCFGBuilder took 463.69 ms. Allocated memory is still 65.0 MB. Free memory was 31.5 MB in the beginning and 46.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:16,920 INFO L168 Benchmark]: TraceAbstraction took 2445.90 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 46.1 MB in the beginning and 32.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. [2020-12-09 19:31:16,920 INFO L168 Benchmark]: Witness Printer took 2.94 ms. Allocated memory is still 79.7 MB. Free memory was 32.6 MB in the beginning and 32.0 MB in the end (delta: 605.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 19:31:16,923 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 52.4 MB. Free memory is still 34.4 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 358.00 ms. Allocated memory was 52.4 MB in the beginning and 65.0 MB in the end (delta: 12.6 MB). Free memory was 28.9 MB in the beginning and 35.3 MB in the end (delta: -6.4 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.95 ms. Allocated memory is still 65.0 MB. Free memory was 35.3 MB in the beginning and 33.2 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 25.35 ms. Allocated memory is still 65.0 MB. Free memory was 33.2 MB in the beginning and 31.8 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 463.69 ms. Allocated memory is still 65.0 MB. Free memory was 31.5 MB in the beginning and 46.5 MB in the end (delta: -14.9 MB). Peak memory consumption was 11.7 MB. Max. memory is 16.1 GB. * TraceAbstraction took 2445.90 ms. Allocated memory was 65.0 MB in the beginning and 79.7 MB in the end (delta: 14.7 MB). Free memory was 46.1 MB in the beginning and 32.6 MB in the end (delta: 13.5 MB). Peak memory consumption was 28.2 MB. Max. memory is 16.1 GB. * Witness Printer took 2.94 ms. Allocated memory is still 79.7 MB. Free memory was 32.6 MB in the beginning and 32.0 MB in the end (delta: 605.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] int flag = __VERIFIER_nondet_int(); [L533] List p, a, t; [L534] a = (List) malloc(sizeof(struct node)) [L535] COND FALSE !(a == 0) [L536] p = a [L537] COND FALSE !(__VERIFIER_nondet_int()) [L548] p->h = 3 [L549] p = a [L550] COND TRUE \read(flag) [L551] EXPR p->h [L551] COND FALSE !(p->h == 1) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 54 locations, 22 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 2.3s, OverallIterations: 5, TraceHistogramMax: 1, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 143 SDtfs, 269 SDslu, 127 SDs, 0 SdLazy, 213 SolverSat, 41 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 31 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=69occurred 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, 4 MinimizatonAttempts, 49 StatesRemovedByMinimization, 3 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 44 NumberOfCodeBlocks, 44 NumberOfCodeBlocksAsserted, 5 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 1127 SizeOfPredicates, 13 NumberOfNonLiveVariables, 150 ConjunctsInSsa, 19 ConjunctsInUnsatCore, 4 InterpolantComputations, 4 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...