./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/list-1.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_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ............................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/config -Xmx15G -Xms4m -jar /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data -tc /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/list-1.i -s /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 6ba4928d27614bbdf140b58cd6ad1ef338e79461 ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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 11:14:42,846 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:14:42,847 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:14:42,874 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:14:42,875 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:14:42,882 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:14:42,884 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:14:42,886 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:14:42,887 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:14:42,888 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:14:42,889 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:14:42,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:14:42,891 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:14:42,892 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:14:42,892 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:14:42,893 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:14:42,894 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:14:42,895 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:14:42,896 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:14:42,898 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:14:42,900 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:14:42,901 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:14:42,903 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:14:42,904 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:14:42,907 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:14:42,907 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:14:42,908 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:14:42,909 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:14:42,909 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:14:42,910 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:14:42,911 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:14:42,912 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:14:42,912 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:14:42,913 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:14:42,914 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:14:42,914 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:14:42,915 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:14:42,915 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:14:42,915 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:14:42,916 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:14:42,917 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:14:42,918 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2020-12-09 11:14:42,937 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:14:42,938 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:14:42,938 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:14:42,938 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:14:42,939 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2020-12-09 11:14:42,939 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:14:42,940 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2020-12-09 11:14:42,940 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2020-12-09 11:14:42,940 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2020-12-09 11:14:42,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 11:14:42,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 11:14:42,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 11:14:42,941 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:14:42,942 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:14:42,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:14:42,943 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:14:42,943 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:14:42,943 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2020-12-09 11:14:42,943 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-09 11:14:42,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:14:42,943 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:14:42,943 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_368a67cc-5398-44f6-9bba-a3d0745635e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2020-12-09 11:14:43,104 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:14:43,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:14:43,122 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:14:43,123 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:14:43,123 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:14:43,124 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/../../sv-benchmarks/c/list-properties/list-1.i [2020-12-09 11:14:43,179 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/8fea72884/e6743da1c7d0416aaa311a4ae8fec8f4/FLAGefd500769 [2020-12-09 11:14:43,597 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:14:43,597 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i [2020-12-09 11:14:43,607 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/8fea72884/e6743da1c7d0416aaa311a4ae8fec8f4/FLAGefd500769 [2020-12-09 11:14:43,617 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/8fea72884/e6743da1c7d0416aaa311a4ae8fec8f4 [2020-12-09 11:14:43,618 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:14:43,619 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:14:43,621 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:14:43,621 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:14:43,624 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:14:43,625 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@493c5eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43, skipping insertion in model container [2020-12-09 11:14:43,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,633 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:14:43,662 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:14:43,829 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_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2020-12-09 11:14:43,831 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:14:43,837 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:14:43,864 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_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2020-12-09 11:14:43,865 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:14:43,898 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:14:43,899 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43 WrapperNode [2020-12-09 11:14:43,899 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:14:43,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:14:43,900 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:14:43,900 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:14:43,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,915 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,929 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:14:43,930 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:14:43,930 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:14:43,930 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:14:43,935 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,936 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,938 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,938 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,943 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,946 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... [2020-12-09 11:14:43,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:14:43,951 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:14:43,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:14:43,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:14:43,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:44,009 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-09 11:14:44,010 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:14:44,011 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:14:44,337 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:14:44,337 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 11:14:44,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:44 BoogieIcfgContainer [2020-12-09 11:14:44,339 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:14:44,341 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:14:44,341 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:14:44,344 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:14:44,344 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:14:43" (1/3) ... [2020-12-09 11:14:44,345 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163d66b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:14:44, skipping insertion in model container [2020-12-09 11:14:44,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:43" (2/3) ... [2020-12-09 11:14:44,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@163d66b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:14:44, skipping insertion in model container [2020-12-09 11:14:44,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:44" (3/3) ... [2020-12-09 11:14:44,353 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-12-09 11:14:44,375 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:14:44,378 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 26 error locations. [2020-12-09 11:14:44,388 INFO L253 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2020-12-09 11:14:44,404 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:14:44,405 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 11:14:44,405 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:14:44,405 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:14:44,405 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:14:44,405 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:14:44,405 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:14:44,405 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:14:44,418 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-12-09 11:14:44,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:14:44,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:44,424 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:14:44,425 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:44,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:44,430 INFO L82 PathProgramCache]: Analyzing trace with hash 157337163, now seen corresponding path program 1 times [2020-12-09 11:14:44,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:44,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040476958] [2020-12-09 11:14:44,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:44,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:44,550 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 11:14:44,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040476958] [2020-12-09 11:14:44,551 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:44,551 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:14:44,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046987232] [2020-12-09 11:14:44,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-12-09 11:14:44,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:44,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-12-09 11:14:44,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-12-09 11:14:44,567 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 2 states. [2020-12-09 11:14:44,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:44,578 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2020-12-09 11:14:44,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-12-09 11:14:44,579 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2020-12-09 11:14:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:44,586 INFO L225 Difference]: With dead ends: 56 [2020-12-09 11:14:44,586 INFO L226 Difference]: Without dead ends: 52 [2020-12-09 11:14:44,588 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 11:14:44,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-09 11:14:44,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2020-12-09 11:14:44,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 11:14:44,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-12-09 11:14:44,617 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 5 [2020-12-09 11:14:44,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:44,617 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-12-09 11:14:44,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-12-09 11:14:44,618 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-12-09 11:14:44,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:14:44,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:44,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:14:44,618 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-09 11:14:44,618 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:44,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:44,619 INFO L82 PathProgramCache]: Analyzing trace with hash 157311537, now seen corresponding path program 1 times [2020-12-09 11:14:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292883243] [2020-12-09 11:14:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:44,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:44,670 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 11:14:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292883243] [2020-12-09 11:14:44,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:44,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:14:44,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784986056] [2020-12-09 11:14:44,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:14:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:14:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:44,672 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 4 states. [2020-12-09 11:14:44,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:44,767 INFO L93 Difference]: Finished difference Result 59 states and 64 transitions. [2020-12-09 11:14:44,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:14:44,767 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 11:14:44,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:44,768 INFO L225 Difference]: With dead ends: 59 [2020-12-09 11:14:44,768 INFO L226 Difference]: Without dead ends: 59 [2020-12-09 11:14:44,769 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 11:14:44,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-12-09 11:14:44,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-12-09 11:14:44,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 11:14:44,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 64 transitions. [2020-12-09 11:14:44,775 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 64 transitions. Word has length 5 [2020-12-09 11:14:44,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:44,776 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 64 transitions. [2020-12-09 11:14:44,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:14:44,776 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 64 transitions. [2020-12-09 11:14:44,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2020-12-09 11:14:44,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:44,776 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2020-12-09 11:14:44,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-09 11:14:44,777 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:44,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:44,777 INFO L82 PathProgramCache]: Analyzing trace with hash 157311538, now seen corresponding path program 1 times [2020-12-09 11:14:44,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:44,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430996433] [2020-12-09 11:14:44,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:44,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:44,833 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 11:14:44,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430996433] [2020-12-09 11:14:44,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:44,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-09 11:14:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495684234] [2020-12-09 11:14:44,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:14:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:14:44,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:44,836 INFO L87 Difference]: Start difference. First operand 54 states and 64 transitions. Second operand 4 states. [2020-12-09 11:14:44,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:44,930 INFO L93 Difference]: Finished difference Result 72 states and 79 transitions. [2020-12-09 11:14:44,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:14:44,931 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 5 [2020-12-09 11:14:44,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:44,932 INFO L225 Difference]: With dead ends: 72 [2020-12-09 11:14:44,932 INFO L226 Difference]: Without dead ends: 72 [2020-12-09 11:14:44,932 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 11:14:44,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-12-09 11:14:44,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 66. [2020-12-09 11:14:44,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-09 11:14:44,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-12-09 11:14:44,939 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 5 [2020-12-09 11:14:44,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:44,940 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-12-09 11:14:44,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:14:44,940 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-12-09 11:14:44,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 11:14:44,941 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:44,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:44,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-09 11:14:44,941 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash 247613557, now seen corresponding path program 1 times [2020-12-09 11:14:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:44,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713620912] [2020-12-09 11:14:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:44,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:44,995 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 11:14:44,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713620912] [2020-12-09 11:14:44,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:44,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:44,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955274269] [2020-12-09 11:14:44,996 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:44,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:44,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:44,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:44,997 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 5 states. [2020-12-09 11:14:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:45,087 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-09 11:14:45,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:14:45,088 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 11:14:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:45,088 INFO L225 Difference]: With dead ends: 84 [2020-12-09 11:14:45,089 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 11:14:45,089 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 11:14:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 11:14:45,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2020-12-09 11:14:45,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-09 11:14:45,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 76 transitions. [2020-12-09 11:14:45,093 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 76 transitions. Word has length 11 [2020-12-09 11:14:45,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:45,093 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 76 transitions. [2020-12-09 11:14:45,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:45,093 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 76 transitions. [2020-12-09 11:14:45,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 11:14:45,094 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:45,094 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:45,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-09 11:14:45,094 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:45,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1128259475, now seen corresponding path program 1 times [2020-12-09 11:14:45,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:45,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543751916] [2020-12-09 11:14:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:45,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:45,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:45,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543751916] [2020-12-09 11:14:45,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:45,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:14:45,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453360648] [2020-12-09 11:14:45,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:45,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:45,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:45,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:45,136 INFO L87 Difference]: Start difference. First operand 68 states and 76 transitions. Second operand 5 states. [2020-12-09 11:14:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:45,223 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-12-09 11:14:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:14:45,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 11:14:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:45,224 INFO L225 Difference]: With dead ends: 84 [2020-12-09 11:14:45,224 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 11:14:45,224 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 11:14:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 11:14:45,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 65. [2020-12-09 11:14:45,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-09 11:14:45,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 73 transitions. [2020-12-09 11:14:45,228 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 73 transitions. Word has length 11 [2020-12-09 11:14:45,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:45,228 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 73 transitions. [2020-12-09 11:14:45,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:45,228 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 73 transitions. [2020-12-09 11:14:45,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-09 11:14:45,229 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:45,229 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:45,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-09 11:14:45,229 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:45,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1128259474, now seen corresponding path program 1 times [2020-12-09 11:14:45,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:45,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34687306] [2020-12-09 11:14:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:45,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:45,282 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34687306] [2020-12-09 11:14:45,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:45,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-09 11:14:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929658522] [2020-12-09 11:14:45,283 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:45,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:45,284 INFO L87 Difference]: Start difference. First operand 65 states and 73 transitions. Second operand 5 states. [2020-12-09 11:14:45,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:45,393 INFO L93 Difference]: Finished difference Result 76 states and 85 transitions. [2020-12-09 11:14:45,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:14:45,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-12-09 11:14:45,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:45,394 INFO L225 Difference]: With dead ends: 76 [2020-12-09 11:14:45,394 INFO L226 Difference]: Without dead ends: 76 [2020-12-09 11:14:45,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-09 11:14:45,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-12-09 11:14:45,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 50. [2020-12-09 11:14:45,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-09 11:14:45,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-12-09 11:14:45,397 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 11 [2020-12-09 11:14:45,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:45,397 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-12-09 11:14:45,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:45,397 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-12-09 11:14:45,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:14:45,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:45,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:45,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-09 11:14:45,398 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:45,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:45,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1730475431, now seen corresponding path program 1 times [2020-12-09 11:14:45,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:45,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576192241] [2020-12-09 11:14:45,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:45,429 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 11:14:45,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576192241] [2020-12-09 11:14:45,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:45,430 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:45,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784962383] [2020-12-09 11:14:45,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:45,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:45,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:45,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:45,431 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 5 states. [2020-12-09 11:14:45,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:45,488 INFO L93 Difference]: Finished difference Result 73 states and 79 transitions. [2020-12-09 11:14:45,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:14:45,488 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 13 [2020-12-09 11:14:45,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:45,489 INFO L225 Difference]: With dead ends: 73 [2020-12-09 11:14:45,489 INFO L226 Difference]: Without dead ends: 73 [2020-12-09 11:14:45,489 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 11:14:45,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-09 11:14:45,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-09 11:14:45,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-09 11:14:45,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-12-09 11:14:45,492 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 13 [2020-12-09 11:14:45,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:45,493 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-12-09 11:14:45,493 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:45,493 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-12-09 11:14:45,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:14:45,493 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:45,493 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:45,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-09 11:14:45,493 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:45,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:45,494 INFO L82 PathProgramCache]: Analyzing trace with hash 2105045028, now seen corresponding path program 1 times [2020-12-09 11:14:45,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:45,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052706277] [2020-12-09 11:14:45,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:45,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:45,520 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 11:14:45,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052706277] [2020-12-09 11:14:45,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:45,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:45,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54771844] [2020-12-09 11:14:45,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-09 11:14:45,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2020-12-09 11:14:45,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-09 11:14:45,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-09 11:14:45,521 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 5 states. [2020-12-09 11:14:45,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:45,580 INFO L93 Difference]: Finished difference Result 71 states and 77 transitions. [2020-12-09 11:14:45,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-09 11:14:45,580 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-12-09 11:14:45,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:45,581 INFO L225 Difference]: With dead ends: 71 [2020-12-09 11:14:45,581 INFO L226 Difference]: Without dead ends: 71 [2020-12-09 11:14:45,581 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 11:14:45,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-09 11:14:45,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 54. [2020-12-09 11:14:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-09 11:14:45,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 62 transitions. [2020-12-09 11:14:45,584 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 62 transitions. Word has length 14 [2020-12-09 11:14:45,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:45,584 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 62 transitions. [2020-12-09 11:14:45,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-09 11:14:45,584 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 62 transitions. [2020-12-09 11:14:45,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:14:45,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:45,585 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:45,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-09 11:14:45,585 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:45,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:45,585 INFO L82 PathProgramCache]: Analyzing trace with hash 831891515, now seen corresponding path program 1 times [2020-12-09 11:14:45,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2020-12-09 11:14:45,586 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756293849] [2020-12-09 11:14:45,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-09 11:14:45,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:14:45,594 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:14:45,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:14:45,601 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:14:45,616 INFO L173 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2020-12-09 11:14:45,616 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:14:45,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-09 11:14:45,633 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:14:45 BoogieIcfgContainer [2020-12-09 11:14:45,633 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:14:45,633 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:14:45,633 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:14:45,633 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:14:45,634 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:44" (3/4) ... [2020-12-09 11:14:45,636 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:14:45,636 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:14:45,637 INFO L168 Benchmark]: Toolchain (without parser) took 2016.71 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 77.9 MB in the beginning and 55.3 MB in the end (delta: 22.6 MB). Peak memory consumption was 45.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:45,637 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 37.1 MB in the beginning and 37.0 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:45,638 INFO L168 Benchmark]: CACSL2BoogieTranslator took 278.00 ms. Allocated memory is still 111.1 MB. Free memory was 77.5 MB in the beginning and 76.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:45,638 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.97 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:45,638 INFO L168 Benchmark]: Boogie Preprocessor took 20.17 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 72.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:45,639 INFO L168 Benchmark]: RCFGBuilder took 388.97 ms. Allocated memory is still 111.1 MB. Free memory was 72.7 MB in the beginning and 39.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:45,639 INFO L168 Benchmark]: TraceAbstraction took 1291.91 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 39.2 MB in the beginning and 55.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:45,640 INFO L168 Benchmark]: Witness Printer took 2.48 ms. Allocated memory is still 134.2 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:45,642 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 71.3 MB. Free memory was 37.1 MB in the beginning and 37.0 MB in the end (delta: 67.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 278.00 ms. Allocated memory is still 111.1 MB. Free memory was 77.5 MB in the beginning and 76.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 29.97 ms. Allocated memory is still 111.1 MB. Free memory was 76.0 MB in the beginning and 74.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.17 ms. Allocated memory is still 111.1 MB. Free memory was 74.3 MB in the beginning and 72.7 MB in the end (delta: 1.6 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 388.97 ms. Allocated memory is still 111.1 MB. Free memory was 72.7 MB in the beginning and 39.6 MB in the end (delta: 33.1 MB). Peak memory consumption was 33.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1291.91 ms. Allocated memory was 111.1 MB in the beginning and 134.2 MB in the end (delta: 23.1 MB). Free memory was 39.2 MB in the beginning and 55.3 MB in the end (delta: -16.1 MB). Peak memory consumption was 9.9 MB. Max. memory is 16.1 GB. * Witness Printer took 2.48 ms. Allocated memory is still 134.2 MB. Free memory is still 55.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) [L558] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 56 locations, 26 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 1.2s, OverallIterations: 9, TraceHistogramMax: 2, AutomataDifference: 0.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 268 SDtfs, 385 SDslu, 325 SDs, 0 SdLazy, 525 SolverSat, 92 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 44 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=68occurred 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, 8 MinimizatonAttempts, 110 StatesRemovedByMinimization, 7 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.2s InterpolantComputationTime, 90 NumberOfCodeBlocks, 90 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 67 ConstructedInterpolants, 0 QuantifiedInterpolants, 3539 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.0-7b2dab5 [2020-12-09 11:14:47,285 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-09 11:14:47,286 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-09 11:14:47,307 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-09 11:14:47,308 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-09 11:14:47,309 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-09 11:14:47,310 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-09 11:14:47,312 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-09 11:14:47,314 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-09 11:14:47,315 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-09 11:14:47,315 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-09 11:14:47,323 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-09 11:14:47,324 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-09 11:14:47,325 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-09 11:14:47,327 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-09 11:14:47,328 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-09 11:14:47,329 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-09 11:14:47,331 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-09 11:14:47,333 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-09 11:14:47,335 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-09 11:14:47,338 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-09 11:14:47,339 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-09 11:14:47,340 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-09 11:14:47,341 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-09 11:14:47,343 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-09 11:14:47,344 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-09 11:14:47,344 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-09 11:14:47,345 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-09 11:14:47,345 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-09 11:14:47,346 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-09 11:14:47,346 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-09 11:14:47,347 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-09 11:14:47,348 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-09 11:14:47,348 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-09 11:14:47,349 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-09 11:14:47,349 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-09 11:14:47,350 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-09 11:14:47,350 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-09 11:14:47,350 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-09 11:14:47,351 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-09 11:14:47,351 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-09 11:14:47,352 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2020-12-09 11:14:47,373 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-09 11:14:47,373 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-09 11:14:47,373 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2020-12-09 11:14:47,374 INFO L138 SettingsManager]: * User list type=DISABLED [2020-12-09 11:14:47,374 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2020-12-09 11:14:47,374 INFO L138 SettingsManager]: * Explicit value domain=true [2020-12-09 11:14:47,374 INFO L138 SettingsManager]: * Octagon Domain=false [2020-12-09 11:14:47,374 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2020-12-09 11:14:47,374 INFO L138 SettingsManager]: * Interval Domain=false [2020-12-09 11:14:47,375 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-09 11:14:47,375 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-09 11:14:47,375 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-09 11:14:47,375 INFO L138 SettingsManager]: * sizeof long=4 [2020-12-09 11:14:47,375 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2020-12-09 11:14:47,375 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2020-12-09 11:14:47,376 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2020-12-09 11:14:47,377 INFO L138 SettingsManager]: * sizeof long double=12 [2020-12-09 11:14:47,377 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-09 11:14:47,377 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-09 11:14:47,377 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-09 11:14:47,377 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-09 11:14:47,377 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-09 11:14:47,377 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-09 11:14:47,378 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-09 11:14:47,378 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-12-09 11:14:47,378 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2020-12-09 11:14:47,378 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-09 11:14:47,378 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-12-09 11:14:47,378 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_368a67cc-5398-44f6-9bba-a3d0745635e8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6ba4928d27614bbdf140b58cd6ad1ef338e79461 [2020-12-09 11:14:47,593 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-09 11:14:47,612 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-09 11:14:47,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-09 11:14:47,615 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-09 11:14:47,616 INFO L275 PluginConnector]: CDTParser initialized [2020-12-09 11:14:47,617 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/../../sv-benchmarks/c/list-properties/list-1.i [2020-12-09 11:14:47,659 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/d130dfd70/f7cd99436fac403887a66a778f4a121d/FLAGb3b6d7ec4 [2020-12-09 11:14:48,106 INFO L306 CDTParser]: Found 1 translation units. [2020-12-09 11:14:48,106 INFO L160 CDTParser]: Scanning /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i [2020-12-09 11:14:48,121 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/d130dfd70/f7cd99436fac403887a66a778f4a121d/FLAGb3b6d7ec4 [2020-12-09 11:14:48,131 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/data/d130dfd70/f7cd99436fac403887a66a778f4a121d [2020-12-09 11:14:48,133 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-09 11:14:48,134 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-09 11:14:48,134 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-09 11:14:48,134 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-09 11:14:48,137 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-09 11:14:48,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3d7ffbae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48, skipping insertion in model container [2020-12-09 11:14:48,139 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-09 11:14:48,178 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-09 11:14:48,401 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_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2020-12-09 11:14:48,404 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:14:48,433 INFO L203 MainTranslator]: Completed pre-run [2020-12-09 11:14:48,472 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_368a67cc-5398-44f6-9bba-a3d0745635e8/sv-benchmarks/c/list-properties/list-1.i[23408,23421] [2020-12-09 11:14:48,473 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-09 11:14:48,518 INFO L208 MainTranslator]: Completed translation [2020-12-09 11:14:48,518 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48 WrapperNode [2020-12-09 11:14:48,518 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-09 11:14:48,519 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-09 11:14:48,519 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-09 11:14:48,519 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-09 11:14:48,524 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,538 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,553 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-09 11:14:48,554 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-09 11:14:48,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-09 11:14:48,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-09 11:14:48,560 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,560 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,563 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,563 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,574 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,575 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... [2020-12-09 11:14:48,578 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-09 11:14:48,579 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-09 11:14:48,579 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-09 11:14:48,579 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-09 11:14:48,579 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (1/1) ... No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:48,635 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2020-12-09 11:14:48,636 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-09 11:14:48,636 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-09 11:14:48,995 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-09 11:14:48,995 INFO L299 CfgBuilder]: Removed 14 assume(true) statements. [2020-12-09 11:14:48,996 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:48 BoogieIcfgContainer [2020-12-09 11:14:48,996 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-09 11:14:48,997 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-09 11:14:48,997 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-09 11:14:48,999 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-09 11:14:49,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.12 11:14:48" (1/3) ... [2020-12-09 11:14:49,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8231b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:14:49, skipping insertion in model container [2020-12-09 11:14:49,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.12 11:14:48" (2/3) ... [2020-12-09 11:14:49,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3e8231b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.12 11:14:49, skipping insertion in model container [2020-12-09 11:14:49,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:48" (3/3) ... [2020-12-09 11:14:49,001 INFO L111 eAbstractionObserver]: Analyzing ICFG list-1.i [2020-12-09 11:14:49,011 INFO L180 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-09 11:14:49,013 INFO L192 ceAbstractionStarter]: Appying trace abstraction to program that has 26 error locations. [2020-12-09 11:14:49,021 INFO L253 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2020-12-09 11:14:49,035 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-09 11:14:49,035 INFO L378 AbstractCegarLoop]: Hoare is false [2020-12-09 11:14:49,035 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-09 11:14:49,035 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-09 11:14:49,035 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-09 11:14:49,035 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-09 11:14:49,035 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-09 11:14:49,035 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-09 11:14:49,045 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-12-09 11:14:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:14:49,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:49,050 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:14:49,050 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:49,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:49,054 INFO L82 PathProgramCache]: Analyzing trace with hash 889599271, now seen corresponding path program 1 times [2020-12-09 11:14:49,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:49,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [117798494] [2020-12-09 11:14:49,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:49,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:49,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 4 conjunts are in the unsatisfiable core [2020-12-09 11:14:49,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:49,182 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 11:14:49,183 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:49,188 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:49,188 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:49,189 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 11:14:49,202 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 11:14:49,203 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:49,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [117798494] [2020-12-09 11:14:49,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:49,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:14:49,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257210736] [2020-12-09 11:14:49,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:14:49,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:49,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:14:49,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:49,218 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2020-12-09 11:14:49,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:49,430 INFO L93 Difference]: Finished difference Result 69 states and 77 transitions. [2020-12-09 11:14:49,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:14:49,431 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 11:14:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:49,441 INFO L225 Difference]: With dead ends: 69 [2020-12-09 11:14:49,441 INFO L226 Difference]: Without dead ends: 64 [2020-12-09 11:14:49,442 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 11:14:49,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-12-09 11:14:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 59. [2020-12-09 11:14:49,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-09 11:14:49,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-12-09 11:14:49,469 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 6 [2020-12-09 11:14:49,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:49,469 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-12-09 11:14:49,469 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:14:49,470 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-12-09 11:14:49,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-09 11:14:49,470 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:49,470 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-09 11:14:49,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-12-09 11:14:49,672 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:49,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash 889599272, now seen corresponding path program 1 times [2020-12-09 11:14:49,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:49,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1683970532] [2020-12-09 11:14:49,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:49,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:49,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 11:14:49,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:49,849 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 11:14:49,850 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:49,855 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:49,856 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:49,857 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:9 [2020-12-09 11:14:49,884 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:49,884 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:49,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1683970532] [2020-12-09 11:14:49,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:49,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-09 11:14:49,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694524424] [2020-12-09 11:14:49,886 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-09 11:14:49,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:49,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-09 11:14:49,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-09 11:14:49,888 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 4 states. [2020-12-09 11:14:50,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:50,142 INFO L93 Difference]: Finished difference Result 84 states and 91 transitions. [2020-12-09 11:14:50,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-09 11:14:50,143 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-09 11:14:50,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:50,144 INFO L225 Difference]: With dead ends: 84 [2020-12-09 11:14:50,144 INFO L226 Difference]: Without dead ends: 84 [2020-12-09 11:14:50,145 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 11:14:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-09 11:14:50,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-12-09 11:14:50,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-09 11:14:50,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 81 transitions. [2020-12-09 11:14:50,150 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 81 transitions. Word has length 6 [2020-12-09 11:14:50,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:50,151 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 81 transitions. [2020-12-09 11:14:50,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-09 11:14:50,151 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 81 transitions. [2020-12-09 11:14:50,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:14:50,151 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:50,151 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:50,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-12-09 11:14:50,354 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:50,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:50,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1639999327, now seen corresponding path program 1 times [2020-12-09 11:14:50,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:50,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [505370176] [2020-12-09 11:14:50,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 11:14:50,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:50,542 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 11:14:50,543 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:50,545 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:50,545 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:50,545 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 11:14:50,570 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 11:14:50,571 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:50,573 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:50,573 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 11:14:50,573 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-12-09 11:14:50,582 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 11:14:50,583 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:50,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [505370176] [2020-12-09 11:14:50,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:50,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 11:14:50,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679957580] [2020-12-09 11:14:50,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:50,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:50,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:50,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:50,584 INFO L87 Difference]: Start difference. First operand 73 states and 81 transitions. Second operand 6 states. [2020-12-09 11:14:50,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:50,900 INFO L93 Difference]: Finished difference Result 112 states and 119 transitions. [2020-12-09 11:14:50,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:14:50,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 11:14:50,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:50,901 INFO L225 Difference]: With dead ends: 112 [2020-12-09 11:14:50,902 INFO L226 Difference]: Without dead ends: 112 [2020-12-09 11:14:50,902 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 11:14:50,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-09 11:14:50,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 76. [2020-12-09 11:14:50,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-09 11:14:50,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 84 transitions. [2020-12-09 11:14:50,907 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 84 transitions. Word has length 13 [2020-12-09 11:14:50,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:50,907 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 84 transitions. [2020-12-09 11:14:50,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:50,908 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 84 transitions. [2020-12-09 11:14:50,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:14:50,908 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:50,908 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:51,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-12-09 11:14:51,110 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:51,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:51,112 INFO L82 PathProgramCache]: Analyzing trace with hash 903973752, now seen corresponding path program 1 times [2020-12-09 11:14:51,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:51,114 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1766499225] [2020-12-09 11:14:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:51,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:51,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:14:51,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:51,244 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 11:14:51,244 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,246 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:51,246 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,246 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 11:14:51,257 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 13 treesize of output 9 [2020-12-09 11:14:51,258 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,264 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:51,265 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,266 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-12-09 11:14:51,279 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 23 treesize of output 11 [2020-12-09 11:14:51,280 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,282 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:51,282 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 11:14:51,282 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:7 [2020-12-09 11:14:51,296 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:51,296 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:51,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1766499225] [2020-12-09 11:14:51,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:51,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:51,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308003193] [2020-12-09 11:14:51,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:51,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:51,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:51,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:51,298 INFO L87 Difference]: Start difference. First operand 76 states and 84 transitions. Second operand 6 states. [2020-12-09 11:14:51,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:51,684 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2020-12-09 11:14:51,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:14:51,685 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 11:14:51,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:51,686 INFO L225 Difference]: With dead ends: 100 [2020-12-09 11:14:51,686 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 11:14:51,686 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:14:51,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 11:14:51,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 78. [2020-12-09 11:14:51,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-09 11:14:51,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 89 transitions. [2020-12-09 11:14:51,691 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 89 transitions. Word has length 13 [2020-12-09 11:14:51,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:51,691 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 89 transitions. [2020-12-09 11:14:51,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:51,691 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 89 transitions. [2020-12-09 11:14:51,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-09 11:14:51,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:51,692 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:51,892 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-12-09 11:14:51,894 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:51,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:51,895 INFO L82 PathProgramCache]: Analyzing trace with hash 903973753, now seen corresponding path program 1 times [2020-12-09 11:14:51,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:51,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [632212665] [2020-12-09 11:14:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/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 11:14:51,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:51,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:14:51,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:51,971 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 11:14:51,972 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,976 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:51,976 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:51,976 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 11:14:51,997 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 13 treesize of output 9 [2020-12-09 11:14:51,998 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,007 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,011 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 13 treesize of output 9 [2020-12-09 11:14:52,012 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,020 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,021 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,021 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:21 [2020-12-09 11:14:52,048 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 19 treesize of output 7 [2020-12-09 11:14:52,049 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,058 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,061 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 21 treesize of output 9 [2020-12-09 11:14:52,062 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,071 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,072 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,072 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:9 [2020-12-09 11:14:52,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:52,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:52,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [632212665] [2020-12-09 11:14:52,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:52,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:52,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789320197] [2020-12-09 11:14:52,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:52,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:52,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:52,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:52,102 INFO L87 Difference]: Start difference. First operand 78 states and 89 transitions. Second operand 6 states. [2020-12-09 11:14:52,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:52,592 INFO L93 Difference]: Finished difference Result 101 states and 111 transitions. [2020-12-09 11:14:52,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:14:52,593 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 13 [2020-12-09 11:14:52,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:52,594 INFO L225 Difference]: With dead ends: 101 [2020-12-09 11:14:52,594 INFO L226 Difference]: Without dead ends: 101 [2020-12-09 11:14:52,595 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-09 11:14:52,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-09 11:14:52,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 69. [2020-12-09 11:14:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-09 11:14:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 78 transitions. [2020-12-09 11:14:52,600 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 78 transitions. Word has length 13 [2020-12-09 11:14:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:52,600 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 78 transitions. [2020-12-09 11:14:52,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 78 transitions. [2020-12-09 11:14:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:14:52,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:52,601 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:52,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-12-09 11:14:52,803 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:52,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:52,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1381288014, now seen corresponding path program 1 times [2020-12-09 11:14:52,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:52,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1932836422] [2020-12-09 11:14:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:52,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:52,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2020-12-09 11:14:52,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:52,865 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 11:14:52,866 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,868 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,868 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,868 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:6, output treesize:5 [2020-12-09 11:14:52,878 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 13 treesize of output 9 [2020-12-09 11:14:52,879 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,887 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,888 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,888 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:21, output treesize:13 [2020-12-09 11:14:52,901 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 23 treesize of output 11 [2020-12-09 11:14:52,902 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:52,904 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:52,904 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 11:14:52,904 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:5 [2020-12-09 11:14:52,920 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:52,921 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:52,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1932836422] [2020-12-09 11:14:52,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:52,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:52,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868527593] [2020-12-09 11:14:52,921 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:52,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:52,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:52,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:52,922 INFO L87 Difference]: Start difference. First operand 69 states and 78 transitions. Second operand 6 states. [2020-12-09 11:14:53,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:53,253 INFO L93 Difference]: Finished difference Result 91 states and 100 transitions. [2020-12-09 11:14:53,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:14:53,254 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 11:14:53,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:53,254 INFO L225 Difference]: With dead ends: 91 [2020-12-09 11:14:53,255 INFO L226 Difference]: Without dead ends: 91 [2020-12-09 11:14:53,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-09 11:14:53,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-09 11:14:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 67. [2020-12-09 11:14:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-09 11:14:53,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 76 transitions. [2020-12-09 11:14:53,258 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 76 transitions. Word has length 14 [2020-12-09 11:14:53,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:53,258 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 76 transitions. [2020-12-09 11:14:53,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:53,259 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 76 transitions. [2020-12-09 11:14:53,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-09 11:14:53,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:53,259 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:53,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-12-09 11:14:53,461 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:53,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:53,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1381288015, now seen corresponding path program 1 times [2020-12-09 11:14:53,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:53,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [346357608] [2020-12-09 11:14:53,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:53,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:53,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-09 11:14:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:53,554 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 11:14:53,555 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,560 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:53,561 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,561 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:10, output treesize:11 [2020-12-09 11:14:53,581 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 13 treesize of output 9 [2020-12-09 11:14:53,582 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,590 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:53,594 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 13 treesize of output 9 [2020-12-09 11:14:53,594 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,602 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:53,602 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,603 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 3 variables, input treesize:32, output treesize:21 [2020-12-09 11:14:53,622 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 19 treesize of output 7 [2020-12-09 11:14:53,623 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,632 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:53,633 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 21 treesize of output 9 [2020-12-09 11:14:53,634 INFO L547 ElimStorePlain]: Start of recursive call 3: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,638 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:53,639 INFO L547 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 2 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:53,639 INFO L244 ElimStorePlain]: Needed 3 recursive calls to eliminate 4 variables, input treesize:39, output treesize:11 [2020-12-09 11:14:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-09 11:14:53,662 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:53,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [346357608] [2020-12-09 11:14:53,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:53,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-12-09 11:14:53,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44374693] [2020-12-09 11:14:53,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:53,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:53,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:53,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:53,663 INFO L87 Difference]: Start difference. First operand 67 states and 76 transitions. Second operand 6 states. [2020-12-09 11:14:54,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:54,068 INFO L93 Difference]: Finished difference Result 88 states and 98 transitions. [2020-12-09 11:14:54,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-09 11:14:54,069 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2020-12-09 11:14:54,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:54,069 INFO L225 Difference]: With dead ends: 88 [2020-12-09 11:14:54,069 INFO L226 Difference]: Without dead ends: 88 [2020-12-09 11:14:54,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-09 11:14:54,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-09 11:14:54,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 56. [2020-12-09 11:14:54,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-09 11:14:54,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2020-12-09 11:14:54,072 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 14 [2020-12-09 11:14:54,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:54,073 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2020-12-09 11:14:54,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:54,073 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2020-12-09 11:14:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:14:54,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:54,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:54,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-12-09 11:14:54,275 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:54,276 INFO L82 PathProgramCache]: Analyzing trace with hash 166012290, now seen corresponding path program 1 times [2020-12-09 11:14:54,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:54,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1889943985] [2020-12-09 11:14:54,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:54,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:54,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 11:14:54,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:54,357 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 11:14:54,357 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,360 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:54,360 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,361 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 11:14:54,389 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 11:14:54,390 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,392 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:54,392 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 11:14:54,392 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2020-12-09 11:14:54,400 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 11:14:54,400 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:54,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1889943985] [2020-12-09 11:14:54,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:54,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 11:14:54,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358202466] [2020-12-09 11:14:54,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:54,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:54,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:54,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:54,401 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand 6 states. [2020-12-09 11:14:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:54,637 INFO L93 Difference]: Finished difference Result 100 states and 107 transitions. [2020-12-09 11:14:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-09 11:14:54,638 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 11:14:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:54,638 INFO L225 Difference]: With dead ends: 100 [2020-12-09 11:14:54,638 INFO L226 Difference]: Without dead ends: 100 [2020-12-09 11:14:54,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 11:14:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-09 11:14:54,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 60. [2020-12-09 11:14:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 11:14:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 69 transitions. [2020-12-09 11:14:54,642 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 69 transitions. Word has length 15 [2020-12-09 11:14:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:54,642 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 69 transitions. [2020-12-09 11:14:54,642 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:54,642 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 69 transitions. [2020-12-09 11:14:54,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-09 11:14:54,642 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:54,642 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:54,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3 [2020-12-09 11:14:54,844 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:54,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:54,846 INFO L82 PathProgramCache]: Analyzing trace with hash 166064845, now seen corresponding path program 1 times [2020-12-09 11:14:54,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:54,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [583943526] [2020-12-09 11:14:54,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/mathsat Starting monitored process 10 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:54,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-09 11:14:54,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 7 conjunts are in the unsatisfiable core [2020-12-09 11:14:54,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-09 11:14:54,920 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 11:14:54,920 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,922 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:54,922 INFO L547 ElimStorePlain]: Start of recursive call 1: 1 dim-2 vars, End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,923 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:11, output treesize:7 [2020-12-09 11:14:54,943 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 11:14:54,944 INFO L547 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2020-12-09 11:14:54,946 INFO L625 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2020-12-09 11:14:54,946 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 11:14:54,946 INFO L244 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:5 [2020-12-09 11:14:54,957 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 11:14:54,958 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2020-12-09 11:14:54,958 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [583943526] [2020-12-09 11:14:54,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-09 11:14:54,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-12-09 11:14:54,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672231189] [2020-12-09 11:14:54,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-09 11:14:54,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-12-09 11:14:54,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-09 11:14:54,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-09 11:14:54,959 INFO L87 Difference]: Start difference. First operand 60 states and 69 transitions. Second operand 6 states. [2020-12-09 11:14:55,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-09 11:14:55,210 INFO L93 Difference]: Finished difference Result 83 states and 89 transitions. [2020-12-09 11:14:55,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-09 11:14:55,211 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-12-09 11:14:55,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-09 11:14:55,212 INFO L225 Difference]: With dead ends: 83 [2020-12-09 11:14:55,212 INFO L226 Difference]: Without dead ends: 83 [2020-12-09 11:14:55,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 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 11:14:55,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-09 11:14:55,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-12-09 11:14:55,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-09 11:14:55,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 68 transitions. [2020-12-09 11:14:55,214 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 68 transitions. Word has length 15 [2020-12-09 11:14:55,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-09 11:14:55,214 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 68 transitions. [2020-12-09 11:14:55,214 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-09 11:14:55,214 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 68 transitions. [2020-12-09 11:14:55,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-09 11:14:55,215 INFO L414 BasicCegarLoop]: Found error trace [2020-12-09 11:14:55,215 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-09 11:14:55,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 mathsat -unsat_core_generation=3 [2020-12-09 11:14:55,416 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr22REQUIRES_VIOLATION, ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr21REQUIRES_VIOLATION, ULTIMATE.startErr4REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr23REQUIRES_VIOLATION, ULTIMATE.startErr7REQUIRES_VIOLATION, ULTIMATE.startErr25ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr6REQUIRES_VIOLATION, ULTIMATE.startErr5REQUIRES_VIOLATION, ULTIMATE.startErr9REQUIRES_VIOLATION, ULTIMATE.startErr8REQUIRES_VIOLATION, ULTIMATE.startErr12REQUIRES_VIOLATION, ULTIMATE.startErr11REQUIRES_VIOLATION, ULTIMATE.startErr10REQUIRES_VIOLATION, ULTIMATE.startErr15REQUIRES_VIOLATION, ULTIMATE.startErr14REQUIRES_VIOLATION, ULTIMATE.startErr13REQUIRES_VIOLATION, ULTIMATE.startErr17REQUIRES_VIOLATION, ULTIMATE.startErr16REQUIRES_VIOLATION, ULTIMATE.startErr20REQUIRES_VIOLATION, ULTIMATE.startErr19REQUIRES_VIOLATION, ULTIMATE.startErr24ASSERT_VIOLATIONMEMORY_LEAK, ULTIMATE.startErr18REQUIRES_VIOLATION]=== [2020-12-09 11:14:55,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-09 11:14:55,417 INFO L82 PathProgramCache]: Analyzing trace with hash 851418779, now seen corresponding path program 1 times [2020-12-09 11:14:55,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-12-09 11:14:55,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1419217808] [2020-12-09 11:14:55,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /tmp/vcloud-vcloud-master/worker/run_dir_368a67cc-5398-44f6-9bba-a3d0745635e8/bin/utaipan/mathsat Starting monitored process 11 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with mathsat -unsat_core_generation=3 [2020-12-09 11:14:55,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:14:55,490 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:14:55,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-09 11:14:55,511 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-09 11:14:55,531 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-12-09 11:14:55,531 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-09 11:14:55,732 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 mathsat -unsat_core_generation=3 [2020-12-09 11:14:55,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.12 11:14:55 BoogieIcfgContainer [2020-12-09 11:14:55,782 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-09 11:14:55,783 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-09 11:14:55,783 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-09 11:14:55,783 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-09 11:14:55,783 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.12 11:14:48" (3/4) ... [2020-12-09 11:14:55,786 INFO L140 WitnessPrinter]: No result that supports witness generation found [2020-12-09 11:14:55,786 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-09 11:14:55,787 INFO L168 Benchmark]: Toolchain (without parser) took 7652.75 ms. Allocated memory was 52.4 MB in the beginning and 86.0 MB in the end (delta: 33.6 MB). Free memory was 30.7 MB in the beginning and 27.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:55,787 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 52.4 MB. Free memory is still 34.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:55,787 INFO L168 Benchmark]: CACSL2BoogieTranslator took 384.02 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 30.6 MB in the beginning and 40.7 MB in the end (delta: -10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:55,788 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 69.2 MB. Free memory was 40.7 MB in the beginning and 38.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:55,788 INFO L168 Benchmark]: Boogie Preprocessor took 24.34 ms. Allocated memory is still 69.2 MB. Free memory was 38.7 MB in the beginning and 37.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:55,788 INFO L168 Benchmark]: RCFGBuilder took 417.67 ms. Allocated memory is still 69.2 MB. Free memory was 37.0 MB in the beginning and 46.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:55,789 INFO L168 Benchmark]: TraceAbstraction took 6784.98 ms. Allocated memory was 69.2 MB in the beginning and 86.0 MB in the end (delta: 16.8 MB). Free memory was 46.0 MB in the beginning and 28.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. [2020-12-09 11:14:55,789 INFO L168 Benchmark]: Witness Printer took 3.39 ms. Allocated memory is still 86.0 MB. Free memory was 28.7 MB in the beginning and 27.9 MB in the end (delta: 850.3 kB). There was no memory consumed. Max. memory is 16.1 GB. [2020-12-09 11:14:55,791 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 52.4 MB. Free memory is still 34.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 384.02 ms. Allocated memory was 52.4 MB in the beginning and 69.2 MB in the end (delta: 16.8 MB). Free memory was 30.6 MB in the beginning and 40.7 MB in the end (delta: -10.1 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 34.12 ms. Allocated memory is still 69.2 MB. Free memory was 40.7 MB in the beginning and 38.7 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 24.34 ms. Allocated memory is still 69.2 MB. Free memory was 38.7 MB in the beginning and 37.0 MB in the end (delta: 1.7 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 417.67 ms. Allocated memory is still 69.2 MB. Free memory was 37.0 MB in the beginning and 46.3 MB in the end (delta: -9.3 MB). Peak memory consumption was 7.9 MB. Max. memory is 16.1 GB. * TraceAbstraction took 6784.98 ms. Allocated memory was 69.2 MB in the beginning and 86.0 MB in the end (delta: 16.8 MB). Free memory was 46.0 MB in the beginning and 28.7 MB in the end (delta: 17.3 MB). Peak memory consumption was 35.0 MB. Max. memory is 16.1 GB. * Witness Printer took 3.39 ms. Allocated memory is still 86.0 MB. Free memory was 28.7 MB in the beginning and 27.9 MB in the end (delta: 850.3 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] List a = (List) malloc(sizeof(struct node)); [L533] COND FALSE !(a == 0) [L534] List t; [L535] List p = a; [L536] COND FALSE !(__VERIFIER_nondet_int()) [L543] COND FALSE !(__VERIFIER_nondet_int()) [L550] p->h = 3 [L551] p = a [L552] EXPR p->h [L552] COND FALSE !(p->h == 1) [L554] EXPR p->h [L554] COND FALSE !(p->h == 2) [L556] EXPR p->h [L556] COND FALSE !(p->h != 3) [L558] return 0; - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 64 locations, 26 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 6.6s, OverallIterations: 10, TraceHistogramMax: 2, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 349 SDtfs, 679 SDslu, 716 SDs, 0 SdLazy, 1151 SolverSat, 107 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 2.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 128 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred 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, 9 MinimizatonAttempts, 225 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.7s InterpolantComputationTime, 125 NumberOfCodeBlocks, 125 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 100 ConstructedInterpolants, 0 QuantifiedInterpolants, 6062 SizeOfPredicates, 53 NumberOfNonLiveVariables, 500 ConjunctsInSsa, 66 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 10/10 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...