./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V --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 b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:42,663 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:42,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:42,730 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:42,731 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:42,736 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:42,737 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:42,742 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:42,744 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:42,752 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:42,753 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:42,755 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:42,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:42,760 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:42,762 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:42,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:42,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:42,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:42,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:42,785 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:42,789 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:42,790 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:42,794 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:42,795 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:42,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:42,800 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:42,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:42,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:42,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:42,805 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:42,805 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:42,806 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:42,808 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:42,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:42,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:42,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:42,813 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:42,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:42,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:42,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:42,815 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:42,816 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-11-23 03:47:42,881 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:42,883 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:42,884 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:42,884 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:42,885 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:42,886 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:42,886 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:42,886 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:42,887 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:42,887 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 03:47:42,888 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:42,889 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:42,889 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 03:47:42,889 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 03:47:42,889 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:42,890 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 03:47:42,890 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 03:47:42,890 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 03:47:42,891 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:47:42,891 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:47:42,891 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:42,892 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:47:42,892 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:47:42,894 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:42,894 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:47:42,895 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:42,895 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:47:42,895 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:47:42,895 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:47:42,896 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:42,896 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:47:42,896 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:47:42,896 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:42,897 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:42,897 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:42,897 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:42,898 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:42,898 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:42,898 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 03:47:42,898 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 03:47:42,899 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:42,899 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:42,899 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_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 [2021-11-23 03:47:43,150 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:43,178 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:43,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:43,182 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:43,183 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:43,184 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-23 03:47:43,272 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/b873e9ac4/c5e7006e8d244b30ad0fe37ae5297496/FLAG0af80ee6b [2021-11-23 03:47:43,916 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:43,917 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-23 03:47:43,930 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/b873e9ac4/c5e7006e8d244b30ad0fe37ae5297496/FLAG0af80ee6b [2021-11-23 03:47:44,179 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/b873e9ac4/c5e7006e8d244b30ad0fe37ae5297496 [2021-11-23 03:47:44,182 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:44,184 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:44,185 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:44,185 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:44,189 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:44,190 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:44" (1/1) ... [2021-11-23 03:47:44,192 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a2e41ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:44, skipping insertion in model container [2021-11-23 03:47:44,192 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:44" (1/1) ... [2021-11-23 03:47:44,208 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:44,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:44,584 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:44,593 ERROR L326 MainTranslator]: Unsupported Syntax: Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) [2021-11-23 03:47:44,593 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@3daed9b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:44, skipping insertion in model container [2021-11-23 03:47:44,594 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:44,594 INFO L184 ToolchainWalker]: Toolchain execution was canceled (user or tool) before executing de.uni_freiburg.informatik.ultimate.boogie.procedureinliner [2021-11-23 03:47:44,596 INFO L158 Benchmark]: Toolchain (without parser) took 411.57ms. Allocated memory is still 88.1MB. Free memory was 66.2MB in the beginning and 61.9MB in the end (delta: 4.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:47:44,597 INFO L158 Benchmark]: CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:47:44,598 INFO L158 Benchmark]: CACSL2BoogieTranslator took 409.08ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 61.9MB in the end (delta: 4.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2021-11-23 03:47:44,600 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.35ms. Allocated memory is still 88.1MB. Free memory is still 60.7MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 409.08ms. Allocated memory is still 88.1MB. Free memory was 66.0MB in the beginning and 61.9MB in the end (delta: 4.1MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - UnsupportedSyntaxResult [Line: 562]: Unsupported Syntax Found a cast between two array/pointer types where the value type is smaller than the cast-to type while using memory model HoenickeLindenmann_Original (while Not using bitvector translation) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V --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 b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:47:46,817 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:47:46,819 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:47:46,857 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:47:46,858 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:47:46,860 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:47:46,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:47:46,864 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:47:46,866 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:47:46,868 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:47:46,869 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:47:46,870 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:47:46,871 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:47:46,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:47:46,878 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:47:46,880 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:47:46,881 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:47:46,882 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:47:46,884 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:47:46,890 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:47:46,892 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:47:46,893 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:47:46,897 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:47:46,899 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:47:46,908 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:47:46,909 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:47:46,909 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:47:46,918 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:47:46,919 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:47:46,920 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:47:46,921 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:47:46,922 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:47:46,924 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:47:46,925 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:47:46,926 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:47:46,926 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:47:46,927 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:47:46,927 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:47:46,928 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:47:46,929 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:47:46,930 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:47:46,931 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-11-23 03:47:46,976 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:47:46,976 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:47:46,977 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:47:46,977 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:47:46,978 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:47:46,978 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:47:46,979 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:47:46,979 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:47:46,979 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:47:46,979 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:47:46,980 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:47:46,981 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:47:46,982 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-23 03:47:46,982 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-23 03:47:46,983 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:47:46,983 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:47:46,983 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-11-23 03:47:46,983 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 03:47:46,983 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:47:46,983 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:47:46,984 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-11-23 03:47:46,984 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-11-23 03:47:46,984 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-11-23 03:47:46,984 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:47:46,984 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:47:46,985 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:47:46,985 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:47:46,985 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:47:46,985 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:47:46,985 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:47:46,986 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:47:46,986 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:47:46,986 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:46,986 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:47:46,987 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:47:46,987 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:47:46,987 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:47:46,987 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:47:46,988 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:47:46,988 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_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> b85925b4cd4a90c7937c0d7134475db048f88e78d985bef01499b1b0477a4b80 [2021-11-23 03:47:47,460 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:47:47,489 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:47:47,492 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:47:47,495 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:47:47,495 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:47:47,497 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-23 03:47:47,571 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/c8120f46f/9db939fc83554ccb9a8305601ee4080a/FLAGb95a68adf [2021-11-23 03:47:48,251 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:47:48,251 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/sv-benchmarks/c/list-ext3-properties/sll_shallow_copy-1.i [2021-11-23 03:47:48,279 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/c8120f46f/9db939fc83554ccb9a8305601ee4080a/FLAGb95a68adf [2021-11-23 03:47:48,502 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/data/c8120f46f/9db939fc83554ccb9a8305601ee4080a [2021-11-23 03:47:48,507 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:47:48,508 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:47:48,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:48,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:47:48,520 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:47:48,525 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:48" (1/1) ... [2021-11-23 03:47:48,527 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17de1001 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:48, skipping insertion in model container [2021-11-23 03:47:48,528 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:47:48" (1/1) ... [2021-11-23 03:47:48,536 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:47:48,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:48,911 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:48,919 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:47:48,925 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:47:48,951 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:48,953 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:47:48,986 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:47:49,017 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:47:49,018 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49 WrapperNode [2021-11-23 03:47:49,018 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:47:49,019 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:49,020 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:47:49,020 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:47:49,027 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,043 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,064 INFO L137 Inliner]: procedures = 115, calls = 12, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 38 [2021-11-23 03:47:49,065 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:47:49,066 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:47:49,066 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:47:49,067 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:47:49,075 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,075 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,100 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,101 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,108 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,112 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,121 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:47:49,122 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:47:49,122 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:47:49,122 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:47:49,123 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (1/1) ... [2021-11-23 03:47:49,134 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:47:49,146 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:47:49,157 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:47:49,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:47:49,194 INFO L130 BoogieDeclarations]: Found specification of procedure alloc_node [2021-11-23 03:47:49,195 INFO L138 BoogieDeclarations]: Found implementation of procedure alloc_node [2021-11-23 03:47:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:47:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:47:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:47:49,195 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:47:49,196 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:47:49,196 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:47:49,317 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:47:49,320 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:47:49,614 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:47:49,625 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:47:49,641 INFO L301 CfgBuilder]: Removed 0 assume(true) statements. [2021-11-23 03:47:49,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:49 BoogieIcfgContainer [2021-11-23 03:47:49,643 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:47:49,645 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:47:49,646 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:47:49,649 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:47:49,649 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:47:48" (1/3) ... [2021-11-23 03:47:49,650 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5699fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:49, skipping insertion in model container [2021-11-23 03:47:49,650 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:47:49" (2/3) ... [2021-11-23 03:47:49,651 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5699fe26 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:47:49, skipping insertion in model container [2021-11-23 03:47:49,651 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:49" (3/3) ... [2021-11-23 03:47:49,652 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_shallow_copy-1.i [2021-11-23 03:47:49,658 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:47:49,665 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 15 error locations. [2021-11-23 03:47:49,755 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:47:49,776 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-23 03:47:49,777 INFO L340 AbstractCegarLoop]: Starting to check reachability of 15 error locations. [2021-11-23 03:47:49,798 INFO L276 IsEmpty]: Start isEmpty. Operand has 42 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:47:49,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:47:49,808 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:47:49,809 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:47:49,809 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:47:49,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:47:49,816 INFO L85 PathProgramCache]: Analyzing trace with hash -900798970, now seen corresponding path program 1 times [2021-11-23 03:47:49,828 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:47:49,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [425599448] [2021-11-23 03:47:49,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:49,830 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:47:49,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:47:49,834 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:47:49,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:47:49,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:49,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-23 03:47:49,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:49,991 INFO L388 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 [2021-11-23 03:47:50,175 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:47:50,176 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-23 03:47:50,228 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:50,228 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:47:50,501 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:50,502 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:47:50,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [425599448] [2021-11-23 03:47:50,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [425599448] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:47:50,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1844995701] [2021-11-23 03:47:50,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:47:50,504 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:47:50,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:47:50,507 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:47:50,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (3)] Waiting until timeout for monitored process [2021-11-23 03:47:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:47:50,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:47:50,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:47:50,612 INFO L388 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 [2021-11-23 03:47:50,756 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:47:50,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 24 treesize of output 31 [2021-11-23 03:47:50,827 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:47:50,828 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:36,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1844995701] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:48:36,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1937072323] [2021-11-23 03:48:36,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:48:36,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:48:36,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:48:36,412 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:48:36,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:48:36,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:48:36,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:48:36,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:48:36,475 INFO L388 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 [2021-11-23 03:48:36,629 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:48:36,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-23 03:48:36,700 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:48:36,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:48:51,293 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_alloc_node_~temp~0#1.base_24| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_4| (_ BitVec 32))) (or (exists ((|v_alloc_node_~temp~0#1.base_15| (_ BitVec 32))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (select (store |c_old(#valid)| |v_alloc_node_~temp~0#1.base_15| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_4|)))))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_15|))))))))))) (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (select (store |c_#valid| |v_alloc_node_~temp~0#1.base_24| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_4|)))) (_ bv1 1))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_24|)))))) is different from true [2021-11-23 03:49:06,540 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:06,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1937072323] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:49:06,541 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:49:06,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 8, 8, 8, 8] total 17 [2021-11-23 03:49:06,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60712304] [2021-11-23 03:49:06,558 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:49:06,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:49:06,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:49:06,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:49:06,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=213, Unknown=13, NotChecked=30, Total=306 [2021-11-23 03:49:06,609 INFO L87 Difference]: Start difference. First operand has 42 states, 23 states have (on average 1.6956521739130435) internal successors, (39), 38 states have internal predecessors, (39), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 18 states, 16 states have (on average 1.9375) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:49:09,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:49:09,629 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-11-23 03:49:09,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:49:09,631 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 16 [2021-11-23 03:49:09,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:49:09,636 INFO L225 Difference]: With dead ends: 43 [2021-11-23 03:49:09,637 INFO L226 Difference]: Without dead ends: 40 [2021-11-23 03:49:09,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 63 SyntacticMatches, 13 SemanticMatches, 19 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 77.5s TimeCoverageRelationStatistics Valid=78, Invalid=293, Unknown=13, NotChecked=36, Total=420 [2021-11-23 03:49:09,642 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 15 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 176 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:49:09,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 170 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 176 Unchecked, 0.2s Time] [2021-11-23 03:49:09,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-23 03:49:09,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-11-23 03:49:09,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 25 states have (on average 1.4) internal successors, (35), 35 states have internal predecessors, (35), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:49:09,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 39 transitions. [2021-11-23 03:49:09,679 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 39 transitions. Word has length 16 [2021-11-23 03:49:09,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:49:09,679 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 39 transitions. [2021-11-23 03:49:09,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 1.9375) internal successors, (31), 12 states have internal predecessors, (31), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:49:09,680 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 39 transitions. [2021-11-23 03:49:09,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-23 03:49:09,681 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:49:09,681 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:49:09,697 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:49:09,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:49:10,097 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:49:10,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:49:10,292 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:49:10,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:49:10,293 INFO L85 PathProgramCache]: Analyzing trace with hash -900798969, now seen corresponding path program 1 times [2021-11-23 03:49:10,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:49:10,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1869564107] [2021-11-23 03:49:10,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:10,295 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:49:10,295 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:49:10,300 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:49:10,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:49:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:10,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:49:10,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:49:10,373 INFO L388 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 [2021-11-23 03:49:10,384 INFO L388 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 [2021-11-23 03:49:10,741 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:49:10,742 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:49:10,757 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:49:10,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:49:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:10,832 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:49:23,177 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_alloc_node_~temp~0#1.base_32| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_alloc_node_~temp~0#1.base_31| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_31|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_alloc_node_~temp~0#1.base_31| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse1 (select (store |c_#length| |v_alloc_node_~temp~0#1.base_32| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8|)) (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| .cse1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_32|))))))))) is different from true [2021-11-23 03:49:28,545 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:28,545 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:49:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1869564107] [2021-11-23 03:49:28,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1869564107] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:49:28,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [408155992] [2021-11-23 03:49:28,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:28,547 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:49:28,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:49:28,555 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:49:28,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-23 03:49:28,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:28,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:49:28,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:49:28,657 INFO L388 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 [2021-11-23 03:49:28,668 INFO L388 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 [2021-11-23 03:49:28,887 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:49:28,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:49:28,912 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:49:28,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:49:28,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:28,933 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:49:33,636 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_10| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_4| (_ BitVec 32))) (or (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_4|))) (and (bvule .cse0 (select |c_#length| |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_10|)) (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_4| .cse0))) (exists ((|v_alloc_node_~temp~0#1.base_31| (_ BitVec 32))) (and (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_4|))) (or (not (bvule .cse1 (select (store |c_old(#length)| |v_alloc_node_~temp~0#1.base_31| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_10|))) (not (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_4| .cse1)))) (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_31|))))))) is different from true [2021-11-23 03:49:39,416 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 4 not checked. [2021-11-23 03:49:39,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [408155992] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:49:39,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756650858] [2021-11-23 03:49:39,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:49:39,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:49:39,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:49:39,421 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:49:39,441 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:49:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:49:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 45 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:49:39,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:49:39,488 INFO L388 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 [2021-11-23 03:49:39,499 INFO L388 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 [2021-11-23 03:49:39,701 INFO L354 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2021-11-23 03:49:39,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 29 [2021-11-23 03:49:39,716 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-23 03:49:39,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 26 [2021-11-23 03:49:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:39,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:49:55,526 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_alloc_node_~temp~0#1.base_48| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (exists ((|v_alloc_node_~temp~0#1.base_31| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_31|)))))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule .cse0 (select (store |c_old(#length)| |v_alloc_node_~temp~0#1.base_31| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12|))) (not (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| .cse0)))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| .cse1) (bvule .cse1 (select (store |c_#length| |v_alloc_node_~temp~0#1.base_48| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_48|)))))) is different from false [2021-11-23 03:49:55,919 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:49:55,919 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756650858] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:49:55,919 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:49:55,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 8, 8] total 19 [2021-11-23 03:49:55,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644093796] [2021-11-23 03:49:55,920 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:49:55,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-23 03:49:55,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:49:55,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-23 03:49:55,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=12, NotChecked=96, Total=380 [2021-11-23 03:49:55,923 INFO L87 Difference]: Start difference. First operand 40 states and 39 transitions. Second operand has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:50:00,887 WARN L838 $PredicateComparison]: unable to prove that (and (forall ((|v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| (_ BitVec 32)) (|v_alloc_node_~temp~0#1.base_32| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8| (_ BitVec 32))) (or (exists ((|v_alloc_node_~temp~0#1.base_31| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_31|))) (let ((.cse0 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2|))) (or (not (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| .cse0)) (not (bvule .cse0 (select (store |c_old(#length)| |v_alloc_node_~temp~0#1.base_31| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8|))))))) (let ((.cse1 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2|))) (and (bvule .cse1 (select (store |c_#length| |v_alloc_node_~temp~0#1.base_32| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_8|)) (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_2| .cse1))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_32|))))))))) (forall ((|v_alloc_node_~temp~0#1.base_48| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12| (_ BitVec 32)) (|v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| (_ BitVec 32))) (or (exists ((|v_alloc_node_~temp~0#1.base_31| (_ BitVec 32))) (and (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_alloc_node_~temp~0#1.base_31|)))))) (let ((.cse2 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6|))) (or (not (bvule .cse2 (select (store |c_old(#length)| |v_alloc_node_~temp~0#1.base_31| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12|))) (not (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| .cse2)))))) (let ((.cse3 (bvadd (_ bv4 32) |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6|))) (and (bvule |v_ULTIMATE.start_main_~s~0#1.offset_BEFORE_CALL_6| .cse3) (bvule .cse3 (select (store |c_#length| |v_alloc_node_~temp~0#1.base_48| (_ bv4 32)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_12|)))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_48|)))))) (= |c_old(#valid)| |c_#valid|) (= |c_#length| |c_old(#length)|)) is different from false [2021-11-23 03:50:01,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:01,038 INFO L93 Difference]: Finished difference Result 37 states and 36 transitions. [2021-11-23 03:50:01,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:50:01,040 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) Word has length 16 [2021-11-23 03:50:01,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:01,041 INFO L225 Difference]: With dead ends: 37 [2021-11-23 03:50:01,041 INFO L226 Difference]: Without dead ends: 37 [2021-11-23 03:50:01,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 69 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 4 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 41.2s TimeCoverageRelationStatistics Valid=64, Invalid=280, Unknown=14, NotChecked=148, Total=506 [2021-11-23 03:50:01,052 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 16 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 278 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 207 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:01,053 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 118 Invalid, 278 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 66 Invalid, 0 Unknown, 207 Unchecked, 0.2s Time] [2021-11-23 03:50:01,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-23 03:50:01,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-11-23 03:50:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.28) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:01,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 36 transitions. [2021-11-23 03:50:01,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 36 transitions. Word has length 16 [2021-11-23 03:50:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:01,058 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 36 transitions. [2021-11-23 03:50:01,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 12 states have internal predecessors, (30), 3 states have call successors, (5), 5 states have call predecessors, (5), 6 states have return successors, (6), 4 states have call predecessors, (6), 3 states have call successors, (6) [2021-11-23 03:50:01,059 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 36 transitions. [2021-11-23 03:50:01,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:50:01,060 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:01,060 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:01,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:01,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:01,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:01,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt [2021-11-23 03:50:01,675 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:01,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:01,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1915582951, now seen corresponding path program 1 times [2021-11-23 03:50:01,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:01,676 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1069461191] [2021-11-23 03:50:01,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:01,676 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:01,677 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:01,677 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:01,679 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-11-23 03:50:01,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-23 03:50:01,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:01,748 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:50:01,749 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:50:01,777 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:01,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1069461191] [2021-11-23 03:50:01,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1069461191] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:01,778 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:01,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-23 03:50:01,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804766177] [2021-11-23 03:50:01,782 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:01,782 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:01,782 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:01,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:01,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:01,783 INFO L87 Difference]: Start difference. First operand 37 states and 36 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:01,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:01,842 INFO L93 Difference]: Finished difference Result 36 states and 35 transitions. [2021-11-23 03:50:01,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:01,843 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 03:50:01,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:01,844 INFO L225 Difference]: With dead ends: 36 [2021-11-23 03:50:01,844 INFO L226 Difference]: Without dead ends: 36 [2021-11-23 03:50:01,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-23 03:50:01,847 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:01,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 35 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:01,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-23 03:50:01,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-11-23 03:50:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.24) internal successors, (31), 31 states have internal predecessors, (31), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:01,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 35 transitions. [2021-11-23 03:50:01,854 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 35 transitions. Word has length 18 [2021-11-23 03:50:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:01,854 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 35 transitions. [2021-11-23 03:50:01,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:01,855 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 35 transitions. [2021-11-23 03:50:01,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-23 03:50:01,856 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:01,856 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:01,877 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:02,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:02,078 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:02,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:02,079 INFO L85 PathProgramCache]: Analyzing trace with hash 1915582952, now seen corresponding path program 1 times [2021-11-23 03:50:02,079 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:02,079 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1245218900] [2021-11-23 03:50:02,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:02,079 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:02,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:02,081 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:02,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-11-23 03:50:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:02,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-23 03:50:02,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:02,286 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:02,286 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:02,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 6 [2021-11-23 03:50:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:02,645 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:02,645 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1245218900] [2021-11-23 03:50:02,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1245218900] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:02,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1787666205] [2021-11-23 03:50:02,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:02,646 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:50:02,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:50:02,647 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:50:02,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Waiting until timeout for monitored process [2021-11-23 03:50:02,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:02,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:50:02,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:02,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:50:02,753 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:02,814 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:50:02,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1787666205] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:02,815 INFO L186 FreeRefinementEngine]: Found 2 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:50:02,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 11 [2021-11-23 03:50:02,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929993467] [2021-11-23 03:50:02,815 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:02,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-23 03:50:02,816 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:02,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-23 03:50:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:02,817 INFO L87 Difference]: Start difference. First operand 36 states and 35 transitions. Second operand has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:02,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:02,860 INFO L93 Difference]: Finished difference Result 35 states and 34 transitions. [2021-11-23 03:50:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-23 03:50:02,863 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 18 [2021-11-23 03:50:02,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:02,864 INFO L225 Difference]: With dead ends: 35 [2021-11-23 03:50:02,864 INFO L226 Difference]: Without dead ends: 35 [2021-11-23 03:50:02,864 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:02,866 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 17 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:02,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 30 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:50:02,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-11-23 03:50:02,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-11-23 03:50:02,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 25 states have (on average 1.2) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 34 transitions. [2021-11-23 03:50:02,872 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 34 transitions. Word has length 18 [2021-11-23 03:50:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:02,873 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 34 transitions. [2021-11-23 03:50:02,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 5.0) internal successors, (10), 3 states have internal predecessors, (10), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 34 transitions. [2021-11-23 03:50:02,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-23 03:50:02,874 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:02,874 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:02,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:03,082 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:03,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:03,276 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:03,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:03,277 INFO L85 PathProgramCache]: Analyzing trace with hash -443580503, now seen corresponding path program 1 times [2021-11-23 03:50:03,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:03,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1399151784] [2021-11-23 03:50:03,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:03,277 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:03,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:03,278 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:03,279 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Waiting until timeout for monitored process [2021-11-23 03:50:03,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:03,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:03,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:03,458 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:03,458 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:03,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:03,600 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:03,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1399151784] [2021-11-23 03:50:03,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1399151784] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:03,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [347815469] [2021-11-23 03:50:03,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:03,601 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:50:03,601 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:50:03,606 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:50:03,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Waiting until timeout for monitored process [2021-11-23 03:50:03,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:03,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:03,754 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:03,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:03,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [347815469] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:03,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565062672] [2021-11-23 03:50:03,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:03,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:03,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:03,865 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:03,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-23 03:50:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:03,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:03,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:04,014 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:04,014 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:04,143 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:04,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565062672] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:04,143 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:50:04,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5, 5, 5, 5] total 5 [2021-11-23 03:50:04,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091004833] [2021-11-23 03:50:04,144 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:04,144 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-23 03:50:04,144 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:04,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-23 03:50:04,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-23 03:50:04,145 INFO L87 Difference]: Start difference. First operand 35 states and 34 transitions. Second operand has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:04,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:04,243 INFO L93 Difference]: Finished difference Result 34 states and 33 transitions. [2021-11-23 03:50:04,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-23 03:50:04,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2021-11-23 03:50:04,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:04,244 INFO L225 Difference]: With dead ends: 34 [2021-11-23 03:50:04,244 INFO L226 Difference]: Without dead ends: 34 [2021-11-23 03:50:04,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-23 03:50:04,245 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:04,246 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 85 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-23 03:50:04,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-23 03:50:04,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-11-23 03:50:04,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.16) internal successors, (29), 29 states have internal predecessors, (29), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:04,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 33 transitions. [2021-11-23 03:50:04,251 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 33 transitions. Word has length 23 [2021-11-23 03:50:04,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:04,251 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 33 transitions. [2021-11-23 03:50:04,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 33 transitions. [2021-11-23 03:50:04,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-23 03:50:04,252 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:04,252 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:04,259 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (11)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:04,454 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (12)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:04,675 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-23 03:50:04,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:04,853 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:04,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:04,854 INFO L85 PathProgramCache]: Analyzing trace with hash -866093651, now seen corresponding path program 1 times [2021-11-23 03:50:04,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:04,854 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1707800651] [2021-11-23 03:50:04,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:04,855 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:04,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:04,856 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:04,857 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-11-23 03:50:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:04,910 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-23 03:50:04,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:05,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:05,282 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:05,591 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:05,591 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:05,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1707800651] [2021-11-23 03:50:05,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1707800651] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:05,592 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [698436347] [2021-11-23 03:50:05,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:05,592 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-23 03:50:05,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 [2021-11-23 03:50:05,593 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-23 03:50:05,594 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-11-23 03:50:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:05,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:05,763 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:05,763 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:05,932 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:05,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [698436347] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:05,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900832419] [2021-11-23 03:50:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:05,933 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:50:05,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:50:05,937 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:50:05,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-23 03:50:06,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:06,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:50:06,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:06,135 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:06,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:06,304 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:06,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900832419] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:50:06,305 INFO L186 FreeRefinementEngine]: Found 0 perfect and 6 imperfect interpolant sequences. [2021-11-23 03:50:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 6, 5, 6, 5] total 11 [2021-11-23 03:50:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818386927] [2021-11-23 03:50:06,305 INFO L85 oduleStraightlineAll]: Using 6 imperfect interpolants to construct interpolant automaton [2021-11-23 03:50:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-23 03:50:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-23 03:50:06,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-11-23 03:50:06,307 INFO L87 Difference]: Start difference. First operand 34 states and 33 transitions. Second operand has 12 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:06,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:06,611 INFO L93 Difference]: Finished difference Result 33 states and 32 transitions. [2021-11-23 03:50:06,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:50:06,612 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) Word has length 24 [2021-11-23 03:50:06,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:06,613 INFO L225 Difference]: With dead ends: 33 [2021-11-23 03:50:06,613 INFO L226 Difference]: Without dead ends: 33 [2021-11-23 03:50:06,613 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 125 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-11-23 03:50:06,614 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 12 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:06,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 58 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 92 Invalid, 0 Unknown, 12 Unchecked, 0.3s Time] [2021-11-23 03:50:06,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-11-23 03:50:06,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-11-23 03:50:06,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:06,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 32 transitions. [2021-11-23 03:50:06,620 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 32 transitions. Word has length 24 [2021-11-23 03:50:06,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:06,620 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 32 transitions. [2021-11-23 03:50:06,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 4 states have call successors, (5), 3 states have call predecessors, (5), 5 states have return successors, (5), 4 states have call predecessors, (5), 4 states have call successors, (5) [2021-11-23 03:50:06,621 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 32 transitions. [2021-11-23 03:50:06,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-23 03:50:06,622 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:06,622 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:06,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:06,835 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt (15)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:07,039 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-11-23 03:50:07,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:07,230 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:07,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:07,230 INFO L85 PathProgramCache]: Analyzing trace with hash 907658607, now seen corresponding path program 1 times [2021-11-23 03:50:07,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:07,231 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1829873015] [2021-11-23 03:50:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:07,231 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:07,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:07,232 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:07,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-11-23 03:50:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:07,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-23 03:50:07,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:07,356 INFO L388 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 [2021-11-23 03:50:07,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 03:50:07,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:50:07,527 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:07,527 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:07,678 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:07,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1829873015] [2021-11-23 03:50:07,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1829873015] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:07,679 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:07,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 9 [2021-11-23 03:50:07,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11200405] [2021-11-23 03:50:07,679 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:07,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-23 03:50:07,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:07,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-23 03:50:07,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-23 03:50:07,681 INFO L87 Difference]: Start difference. First operand 33 states and 32 transitions. Second operand has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:07,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:07,932 INFO L93 Difference]: Finished difference Result 32 states and 31 transitions. [2021-11-23 03:50:07,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-23 03:50:07,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 26 [2021-11-23 03:50:07,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:07,934 INFO L225 Difference]: With dead ends: 32 [2021-11-23 03:50:07,934 INFO L226 Difference]: Without dead ends: 32 [2021-11-23 03:50:07,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2021-11-23 03:50:07,935 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:07,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 104 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:50:07,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-23 03:50:07,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-11-23 03:50:07,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 25 states have (on average 1.08) internal successors, (27), 27 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:07,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 31 transitions. [2021-11-23 03:50:07,941 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 31 transitions. Word has length 26 [2021-11-23 03:50:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 31 transitions. [2021-11-23 03:50:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 9 states have internal predecessors, (24), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2021-11-23 03:50:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 31 transitions. [2021-11-23 03:50:07,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:50:07,943 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:07,944 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:07,956 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-11-23 03:50:08,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:08,149 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:08,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:08,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1927354195, now seen corresponding path program 1 times [2021-11-23 03:50:08,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:08,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1179437159] [2021-11-23 03:50:08,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:08,150 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:08,150 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:08,151 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:08,153 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Waiting until timeout for monitored process [2021-11-23 03:50:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:08,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-23 03:50:08,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:08,595 INFO L388 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 15 treesize of output 11 [2021-11-23 03:50:08,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 11 [2021-11-23 03:50:08,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-11-23 03:50:09,066 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:09,067 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:09,485 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:09,486 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:09,486 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1179437159] [2021-11-23 03:50:09,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1179437159] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:50:09,486 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:50:09,486 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9, 8] imperfect sequences [] total 17 [2021-11-23 03:50:09,486 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212304491] [2021-11-23 03:50:09,486 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:09,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-23 03:50:09,487 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:09,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-23 03:50:09,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:50:09,487 INFO L87 Difference]: Start difference. First operand 32 states and 31 transitions. Second operand has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:50:09,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:09,557 INFO L93 Difference]: Finished difference Result 31 states and 30 transitions. [2021-11-23 03:50:09,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-23 03:50:09,573 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 27 [2021-11-23 03:50:09,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:09,574 INFO L225 Difference]: With dead ends: 31 [2021-11-23 03:50:09,574 INFO L226 Difference]: Without dead ends: 31 [2021-11-23 03:50:09,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-23 03:50:09,575 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 46 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:09,576 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [10 Valid, 79 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 46 Unchecked, 0.1s Time] [2021-11-23 03:50:09,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-23 03:50:09,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-11-23 03:50:09,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:09,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 30 transitions. [2021-11-23 03:50:09,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 30 transitions. Word has length 27 [2021-11-23 03:50:09,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:09,580 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 30 transitions. [2021-11-23 03:50:09,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2021-11-23 03:50:09,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 30 transitions. [2021-11-23 03:50:09,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-23 03:50:09,582 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:09,582 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:09,596 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (18)] Ended with exit code 0 [2021-11-23 03:50:09,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:09,793 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:09,793 INFO L85 PathProgramCache]: Analyzing trace with hash 381562161, now seen corresponding path program 1 times [2021-11-23 03:50:09,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:09,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1747477377] [2021-11-23 03:50:09,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:09,794 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:09,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:09,794 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:09,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Waiting until timeout for monitored process [2021-11-23 03:50:09,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:09,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-23 03:50:09,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:09,866 INFO L388 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 [2021-11-23 03:50:10,114 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-23 03:50:10,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 30 treesize of output 37 [2021-11-23 03:50:10,197 INFO L388 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 24 treesize of output 20 [2021-11-23 03:50:10,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 36 treesize of output 20 [2021-11-23 03:50:10,451 INFO L388 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 28 treesize of output 16 [2021-11-23 03:50:10,696 INFO L354 Elim1Store]: treesize reduction 20, result has 28.6 percent of original size [2021-11-23 03:50:10,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 51 treesize of output 54 [2021-11-23 03:50:10,773 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:10,774 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:13,619 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-23 03:50:13,619 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:13,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1747477377] [2021-11-23 03:50:13,620 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1747477377] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:13,620 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:13,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [14] total 23 [2021-11-23 03:50:13,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478226085] [2021-11-23 03:50:13,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:13,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-23 03:50:13,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:13,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-23 03:50:13,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=484, Unknown=1, NotChecked=0, Total=552 [2021-11-23 03:50:13,623 INFO L87 Difference]: Start difference. First operand 31 states and 30 transitions. Second operand has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:13,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:13,793 INFO L93 Difference]: Finished difference Result 30 states and 29 transitions. [2021-11-23 03:50:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-23 03:50:13,793 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 28 [2021-11-23 03:50:13,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:13,794 INFO L225 Difference]: With dead ends: 30 [2021-11-23 03:50:13,794 INFO L226 Difference]: Without dead ends: 30 [2021-11-23 03:50:13,795 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 28 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=76, Invalid=523, Unknown=1, NotChecked=0, Total=600 [2021-11-23 03:50:13,796 INFO L933 BasicCegarLoop]: 11 mSDtfsCounter, 5 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 32 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:13,796 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [5 Valid, 56 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 32 Unchecked, 0.1s Time] [2021-11-23 03:50:13,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-23 03:50:13,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-11-23 03:50:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.0) internal successors, (25), 25 states have internal predecessors, (25), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:13,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 29 transitions. [2021-11-23 03:50:13,801 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 29 transitions. Word has length 28 [2021-11-23 03:50:13,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:13,802 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 29 transitions. [2021-11-23 03:50:13,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 12 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:13,802 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 29 transitions. [2021-11-23 03:50:13,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-23 03:50:13,803 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:50:13,803 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:13,814 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (19)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:14,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:14,013 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 11 more)] === [2021-11-23 03:50:14,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:50:14,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1056474832, now seen corresponding path program 1 times [2021-11-23 03:50:14,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:50:14,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [556779264] [2021-11-23 03:50:14,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:50:14,014 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:50:14,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:50:14,015 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:50:14,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-11-23 03:50:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:50:14,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-23 03:50:14,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:50:14,536 INFO L388 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 36 treesize of output 32 [2021-11-23 03:50:14,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 33 [2021-11-23 03:50:14,870 INFO L388 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 44 treesize of output 28 [2021-11-23 03:50:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-23 03:50:17,388 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:50:25,279 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (or (= (store .cse0 |c_alloc_node_#res#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3|) (exists ((|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|)))))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))) (and (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_alloc_node_#res#1.base|))))))) (_ bv1 1)))) (not (= |c_alloc_node_#res#1.base| (_ bv0 32))))))) is different from false [2021-11-23 03:50:25,951 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse0 (store |c_#valid| |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (or (= (store .cse0 |c_alloc_node_~temp~0#1.base| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3|) (exists ((|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|)))))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))) (and (not (= (_ bv0 1) (bvadd (_ bv1 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |c_alloc_node_~temp~0#1.base|))))))))))))) (not (= (_ bv0 32) |c_alloc_node_~temp~0#1.base|)))))) is different from false [2021-11-23 03:50:26,649 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ BitVec 32)) (|v_alloc_node_~temp~0#1.base_140| (_ BitVec 32)) (|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (Array (_ BitVec 32) (_ BitVec 1)))) (let ((.cse0 (store (store |c_#valid| |v_alloc_node_~temp~0#1.base_140| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (or (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (store .cse0 |v_alloc_node_~temp~0#1.base_140| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_alloc_node_~temp~0#1.base_140|)))))))))) (_ bv1 1)))) (= |v_alloc_node_~temp~0#1.base_140| (_ bv0 32)) (exists ((|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_~s~0#1.base_BEFORE_CALL_22| (_ bv0 1)))) (and (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|)))))) (_ bv1 1))) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (not (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_3| (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))) (not (= (_ bv0 1) (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_140|))))))) is different from false [2021-11-23 03:50:44,494 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store (store |c_#valid| |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |c_alloc_node_#res#1.base| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv1 1)))) (and (not (= (store (store (store .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv0 1)) |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4|)) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))))) (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4| (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))) (_ bv1 1))))))) is different from false [2021-11-23 03:50:45,070 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4| (Array (_ BitVec 32) (_ BitVec 1))) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store (store |c_#valid| |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |c_alloc_node_~temp~0#1.base| (_ bv0 1)))) (or (exists ((|v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv1 1)))) (and (not (= (store (store (store .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv0 1)) |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4|)) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))))) (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32)) (= |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4| (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1))) (not (= (_ bv0 1) (bvadd (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))) (_ bv1 1)))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_ULTIMATE.start_main_#t~ret4#1.base_54|)))))))))) is different from false [2021-11-23 03:50:45,655 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4| (Array (_ BitVec 32) (_ BitVec 1))) (|v_alloc_node_~temp~0#1.base_144| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse1 (store |c_#valid| |v_alloc_node_~temp~0#1.base_144| (_ bv1 1)))) (or (exists ((|v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ BitVec 32)) (|v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ BitVec 32))) (let ((.cse0 (store |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv1 1)))) (and (not (= (store (store (store .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_ULTIMATE.start_main_#t~ret3#1.base_65| (_ bv0 1)) |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4|)) (not (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (select |c_old(#valid)| |v_ULTIMATE.start_main_#t~ret3#1.base_65|)))))) (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse0 |v_ULTIMATE.start_main_#t~ret4#1.base_54|))))))))))) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select |c_#valid| |v_alloc_node_~temp~0#1.base_144|)))))))) (= |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 32)) (not (= (_ bv0 1) (bvneg (bvneg (bvneg (bvneg (bvneg (select .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54|)))))))) (= (store (store (store .cse1 |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv1 1)) |v_alloc_node_~temp~0#1.base_144| (_ bv0 1)) |v_ULTIMATE.start_main_#t~ret4#1.base_54| (_ bv0 1)) |v_ULTIMATE.start_main_old_#valid#1_BEFORE_CALL_4|)))) is different from false [2021-11-23 03:50:45,668 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 5 not checked. [2021-11-23 03:50:45,669 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:50:45,669 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [556779264] [2021-11-23 03:50:45,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [556779264] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:50:45,669 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:50:45,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [17] total 31 [2021-11-23 03:50:45,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877850771] [2021-11-23 03:50:45,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:50:45,670 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-23 03:50:45,670 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:50:45,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-23 03:50:45,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=580, Unknown=18, NotChecked=318, Total=992 [2021-11-23 03:50:45,671 INFO L87 Difference]: Start difference. First operand 30 states and 29 transitions. Second operand has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:46,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:50:46,531 INFO L93 Difference]: Finished difference Result 29 states and 28 transitions. [2021-11-23 03:50:46,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-23 03:50:46,532 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2021-11-23 03:50:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:50:46,533 INFO L225 Difference]: With dead ends: 29 [2021-11-23 03:50:46,534 INFO L226 Difference]: Without dead ends: 0 [2021-11-23 03:50:46,535 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 6 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 28.0s TimeCoverageRelationStatistics Valid=100, Invalid=776, Unknown=18, NotChecked=366, Total=1260 [2021-11-23 03:50:46,535 INFO L933 BasicCegarLoop]: 8 mSDtfsCounter, 9 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 03:50:46,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [9 Valid, 49 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 190 Invalid, 0 Unknown, 20 Unchecked, 0.4s Time] [2021-11-23 03:50:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-11-23 03:50:46,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-11-23 03:50:46,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-23 03:50:46,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-11-23 03:50:46,537 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-11-23 03:50:46,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:50:46,538 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-11-23 03:50:46,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2021-11-23 03:50:46,538 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-11-23 03:50:46,538 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-11-23 03:50:46,540 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION (14 of 15 remaining) [2021-11-23 03:50:46,540 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATION (13 of 15 remaining) [2021-11-23 03:50:46,541 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATION (12 of 15 remaining) [2021-11-23 03:50:46,541 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATION (11 of 15 remaining) [2021-11-23 03:50:46,541 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATION (10 of 15 remaining) [2021-11-23 03:50:46,541 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATION (9 of 15 remaining) [2021-11-23 03:50:46,541 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATION (8 of 15 remaining) [2021-11-23 03:50:46,542 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATION (7 of 15 remaining) [2021-11-23 03:50:46,542 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8ASSERT_VIOLATIONMEMORY_FREE (6 of 15 remaining) [2021-11-23 03:50:46,542 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_FREE (5 of 15 remaining) [2021-11-23 03:50:46,542 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_FREE (4 of 15 remaining) [2021-11-23 03:50:46,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11ASSERT_VIOLATIONMEMORY_FREE (3 of 15 remaining) [2021-11-23 03:50:46,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12ASSERT_VIOLATIONMEMORY_FREE (2 of 15 remaining) [2021-11-23 03:50:46,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_FREE (1 of 15 remaining) [2021-11-23 03:50:46,543 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK (0 of 15 remaining) [2021-11-23 03:50:46,552 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-11-23 03:50:46,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:50:46,747 INFO L732 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:50:46,749 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-23 03:50:46,751 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:50:46 BoogieIcfgContainer [2021-11-23 03:50:46,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-23 03:50:46,752 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-23 03:50:46,752 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-23 03:50:46,752 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-23 03:50:46,752 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:47:49" (3/4) ... [2021-11-23 03:50:46,755 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-11-23 03:50:46,760 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure alloc_node [2021-11-23 03:50:46,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2021-11-23 03:50:46,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-11-23 03:50:46,765 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-11-23 03:50:46,766 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-11-23 03:50:46,800 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/witness.graphml [2021-11-23 03:50:46,801 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-23 03:50:46,802 INFO L158 Benchmark]: Toolchain (without parser) took 178293.44ms. Allocated memory was 62.9MB in the beginning and 98.6MB in the end (delta: 35.7MB). Free memory was 41.7MB in the beginning and 38.6MB in the end (delta: 3.1MB). Peak memory consumption was 36.9MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,802 INFO L158 Benchmark]: CDTParser took 0.27ms. Allocated memory is still 62.9MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:50:46,802 INFO L158 Benchmark]: CACSL2BoogieTranslator took 508.96ms. Allocated memory is still 62.9MB. Free memory was 41.5MB in the beginning and 37.5MB in the end (delta: 4.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,803 INFO L158 Benchmark]: Boogie Procedure Inliner took 45.82ms. Allocated memory is still 62.9MB. Free memory was 37.5MB in the beginning and 35.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,803 INFO L158 Benchmark]: Boogie Preprocessor took 55.30ms. Allocated memory is still 62.9MB. Free memory was 35.5MB in the beginning and 34.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:50:46,804 INFO L158 Benchmark]: RCFGBuilder took 521.59ms. Allocated memory was 62.9MB in the beginning and 98.6MB in the end (delta: 35.7MB). Free memory was 34.3MB in the beginning and 76.2MB in the end (delta: -41.9MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,804 INFO L158 Benchmark]: TraceAbstraction took 177105.87ms. Allocated memory is still 98.6MB. Free memory was 75.8MB in the beginning and 41.7MB in the end (delta: 34.1MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,805 INFO L158 Benchmark]: Witness Printer took 49.23ms. Allocated memory is still 98.6MB. Free memory was 41.7MB in the beginning and 38.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:50:46,807 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27ms. Allocated memory is still 62.9MB. Free memory is still 44.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 508.96ms. Allocated memory is still 62.9MB. Free memory was 41.5MB in the beginning and 37.5MB in the end (delta: 4.0MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 45.82ms. Allocated memory is still 62.9MB. Free memory was 37.5MB in the beginning and 35.7MB in the end (delta: 1.8MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 55.30ms. Allocated memory is still 62.9MB. Free memory was 35.5MB in the beginning and 34.3MB in the end (delta: 1.2MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 521.59ms. Allocated memory was 62.9MB in the beginning and 98.6MB in the end (delta: 35.7MB). Free memory was 34.3MB in the beginning and 76.2MB in the end (delta: -41.9MB). Peak memory consumption was 11.7MB. Max. memory is 16.1GB. * TraceAbstraction took 177105.87ms. Allocated memory is still 98.6MB. Free memory was 75.8MB in the beginning and 41.7MB in the end (delta: 34.1MB). Peak memory consumption was 34.1MB. Max. memory is 16.1GB. * Witness Printer took 49.23ms. Allocated memory is still 98.6MB. Free memory was 41.7MB in the beginning and 38.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 570]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 571]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 572]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 572]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 573]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 573]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 573]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 574]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 574]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 574]: free always succeeds For all program executions holds that free always succeeds at this location - PositiveResult [Line: 568]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 42 locations, 15 error locations. Started 1 CEGAR loops. OverallTime: 177.0s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 10.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 137 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 134 mSDsluCounter, 784 SdHoareTripleChecker+Invalid, 1.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 493 IncrementalHoareTripleChecker+Unchecked, 606 mSDsCounter, 18 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 666 IncrementalHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 18 mSolverCounterUnsat, 178 mSDtfsCounter, 666 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 785 GetRequests, 607 SyntacticMatches, 26 SemanticMatches, 152 ConstructedPredicates, 11 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 151.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, InterpolantAutomatonStates: 90, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 10 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 161.6s InterpolantComputationTime, 401 NumberOfCodeBlocks, 401 NumberOfCodeBlocksAsserted, 19 NumberOfCheckSat, 764 ConstructedInterpolants, 152 QuantifiedInterpolants, 7820 SizeOfPredicates, 61 NumberOfNonLiveVariables, 1184 ConjunctsInSsa, 179 ConjunctsInUnsatCore, 38 InterpolantComputations, 10 PerfectInterpolantSequences, 77/190 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 - AllSpecificationsHoldResult: All specifications hold 15 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-11-23 03:50:46,888 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_13c914da-e56f-4175-a3f3-7c84fe3ff5d8/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE