./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/ldv-memsafety/memset2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8 --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 89c40e0e226fdcfbda8631272bf2c238348d58a6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/ldv-memsafety/memset2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8 --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 89c40e0e226fdcfbda8631272bf2c238348d58a6 ....................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:14:07,698 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:14:07,700 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:14:07,741 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:14:07,742 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:14:07,743 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:14:07,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:14:07,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:14:07,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:14:07,753 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:14:07,754 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:14:07,756 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:14:07,757 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:14:07,761 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:14:07,763 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:14:07,765 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:14:07,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:14:07,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:14:07,775 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:14:07,778 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:14:07,780 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:14:07,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:14:07,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:14:07,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:14:07,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:14:07,804 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:14:07,804 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:14:07,805 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:14:07,806 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:14:07,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:14:07,808 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:14:07,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:14:07,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:14:07,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:14:07,813 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:14:07,813 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:14:07,814 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:14:07,815 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:14:07,815 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:14:07,824 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:14:07,825 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:14:07,826 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 08:14:07,885 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:14:07,885 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:14:07,887 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:14:07,887 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:14:07,888 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:14:07,895 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:14:07,896 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 08:14:07,896 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:14:07,896 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:14:07,897 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 08:14:07,898 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 08:14:07,899 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:14:07,899 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 08:14:07,899 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 08:14:07,900 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 08:14:07,901 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:14:07,902 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:14:07,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:14:07,902 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:14:07,903 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:14:07,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:14:07,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:14:07,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:14:07,904 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:14:07,904 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:14:07,904 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:14:07,907 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:14:07,907 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:14:07,908 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:14:07,908 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:14:07,908 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:14:07,909 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:14:07,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:14:07,909 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:14:07,910 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:14:07,910 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 08:14:07,910 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 08:14:07,910 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:14:07,911 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:14:07,911 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_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89c40e0e226fdcfbda8631272bf2c238348d58a6 [2021-10-13 08:14:08,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:14:08,306 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:14:08,310 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:14:08,311 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:14:08,312 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:14:08,314 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-memsafety/memset2.c [2021-10-13 08:14:08,400 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/2c2db102f/f54c7173244f4bf1bdb0c87c4e6de2ad/FLAG1879f72e6 [2021-10-13 08:14:08,953 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:14:08,953 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/sv-benchmarks/c/ldv-memsafety/memset2.c [2021-10-13 08:14:08,959 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/2c2db102f/f54c7173244f4bf1bdb0c87c4e6de2ad/FLAG1879f72e6 [2021-10-13 08:14:09,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/2c2db102f/f54c7173244f4bf1bdb0c87c4e6de2ad [2021-10-13 08:14:09,357 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:14:09,358 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:14:09,365 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:14:09,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:14:09,369 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:14:09,371 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,373 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e66e89b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09, skipping insertion in model container [2021-10-13 08:14:09,376 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,384 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:14:09,400 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:14:09,605 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:14:09,615 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:14:09,636 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:14:09,653 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:14:09,654 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09 WrapperNode [2021-10-13 08:14:09,654 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:14:09,655 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:14:09,656 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:14:09,656 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:14:09,666 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,678 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,701 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:14:09,702 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:14:09,702 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:14:09,702 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:14:09,711 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,712 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,714 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,721 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,725 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,727 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,736 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:14:09,737 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:14:09,737 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:14:09,738 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:14:09,741 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (1/1) ... [2021-10-13 08:14:09,751 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:14:09,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:09,783 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:14:09,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:14:09,845 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:14:09,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:14:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:14:09,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:14:10,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:14:10,090 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 08:14:10,093 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:14:10 BoogieIcfgContainer [2021-10-13 08:14:10,093 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:14:10,095 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:14:10,096 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:14:10,101 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:14:10,101 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:14:09" (1/3) ... [2021-10-13 08:14:10,103 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5335b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:14:10, skipping insertion in model container [2021-10-13 08:14:10,103 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:09" (2/3) ... [2021-10-13 08:14:10,104 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a5335b7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:14:10, skipping insertion in model container [2021-10-13 08:14:10,104 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:14:10" (3/3) ... [2021-10-13 08:14:10,106 INFO L111 eAbstractionObserver]: Analyzing ICFG memset2.c [2021-10-13 08:14:10,111 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:14:10,111 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 08:14:10,163 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:14:10,171 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, mConcurrency=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 [2021-10-13 08:14:10,172 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 08:14:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand has 9 states, 5 states have (on average 1.8) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-10-13 08:14:10,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 3 [2021-10-13 08:14:10,195 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:10,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1] [2021-10-13 08:14:10,196 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:10,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1553, now seen corresponding path program 1 times [2021-10-13 08:14:10,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:14:10,216 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611546003] [2021-10-13 08:14:10,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:10,217 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:14:10,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:10,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:10,397 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:14:10,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611546003] [2021-10-13 08:14:10,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611546003] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:10,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:10,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:14:10,401 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013827889] [2021-10-13 08:14:10,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:14:10,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:14:10,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:14:10,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:10,427 INFO L87 Difference]: Start difference. First operand has 9 states, 5 states have (on average 1.8) internal successors, (9), 8 states have internal predecessors, (9), 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) Second operand has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-13 08:14:10,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:10,470 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-13 08:14:10,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:14:10,472 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) Word has length 2 [2021-10-13 08:14:10,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:10,481 INFO L225 Difference]: With dead ends: 8 [2021-10-13 08:14:10,495 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 08:14:10,498 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:10,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 08:14:10,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 08:14:10,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 5 states have (on average 1.4) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-10-13 08:14:10,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 08:14:10,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 2 [2021-10-13 08:14:10,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:10,548 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 08:14:10,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.0) internal successors, (2), 2 states have internal predecessors, (2), 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) [2021-10-13 08:14:10,549 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 08:14:10,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:14:10,550 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:10,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:14:10,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 08:14:10,551 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 48179, now seen corresponding path program 1 times [2021-10-13 08:14:10,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:14:10,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575895643] [2021-10-13 08:14:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:10,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:14:10,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:10,622 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:14:10,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575895643] [2021-10-13 08:14:10,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575895643] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:10,623 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:10,623 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 08:14:10,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308030586] [2021-10-13 08:14:10,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:14:10,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:14:10,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:14:10,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:10,628 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-13 08:14:10,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:10,639 INFO L93 Difference]: Finished difference Result 6 states and 6 transitions. [2021-10-13 08:14:10,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:14:10,640 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) Word has length 3 [2021-10-13 08:14:10,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:10,641 INFO L225 Difference]: With dead ends: 6 [2021-10-13 08:14:10,642 INFO L226 Difference]: Without dead ends: 6 [2021-10-13 08:14:10,642 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:10,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2021-10-13 08:14:10,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2021-10-13 08:14:10,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 states have internal predecessors, (6), 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) [2021-10-13 08:14:10,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 6 transitions. [2021-10-13 08:14:10,645 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 6 transitions. Word has length 3 [2021-10-13 08:14:10,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:10,645 INFO L470 AbstractCegarLoop]: Abstraction has 6 states and 6 transitions. [2021-10-13 08:14:10,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2021-10-13 08:14:10,660 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 6 transitions. [2021-10-13 08:14:10,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-13 08:14:10,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:10,661 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-13 08:14:10,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 08:14:10,662 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash 46301616, now seen corresponding path program 1 times [2021-10-13 08:14:10,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:14:10,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58564286] [2021-10-13 08:14:10,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:10,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:14:10,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:10,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:10,772 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:14:10,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58564286] [2021-10-13 08:14:10,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58564286] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:10,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:10,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 08:14:10,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500250716] [2021-10-13 08:14:10,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:14:10,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 08:14:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:14:10,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:14:10,776 INFO L87 Difference]: Start difference. First operand 6 states and 6 transitions. Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-13 08:14:10,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:10,807 INFO L93 Difference]: Finished difference Result 7 states and 7 transitions. [2021-10-13 08:14:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 08:14:10,808 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) Word has length 5 [2021-10-13 08:14:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:10,809 INFO L225 Difference]: With dead ends: 7 [2021-10-13 08:14:10,809 INFO L226 Difference]: Without dead ends: 7 [2021-10-13 08:14:10,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:14:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2021-10-13 08:14:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2021-10-13 08:14:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 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) [2021-10-13 08:14:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2021-10-13 08:14:10,813 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2021-10-13 08:14:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:10,813 INFO L470 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2021-10-13 08:14:10,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 3 states have internal predecessors, (5), 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) [2021-10-13 08:14:10,814 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2021-10-13 08:14:10,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-10-13 08:14:10,814 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:10,814 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-10-13 08:14:10,815 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 08:14:10,815 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:10,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:10,816 INFO L82 PathProgramCache]: Analyzing trace with hash 1435340626, now seen corresponding path program 1 times [2021-10-13 08:14:10,816 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 08:14:10,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89584849] [2021-10-13 08:14:10,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:10,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 08:14:10,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:10,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:10,941 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 08:14:10,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89584849] [2021-10-13 08:14:10,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89584849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 08:14:10,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060189658] [2021-10-13 08:14:10,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:10,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:10,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:10,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:14:10,971 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 08:14:11,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:11,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 08:14:11,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:11,132 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:11,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2060189658] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:11,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [128769388] [2021-10-13 08:14:11,250 INFO L159 IcfgInterpreter]: Started Sifa with 6 locations of interest [2021-10-13 08:14:11,251 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 08:14:11,257 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 08:14:11,264 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 08:14:11,265 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 08:14:11,323 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,330 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:14:11,331 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,331 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 08:14:11,332 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 08:14:11,333 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,334 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 08:14:11,343 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 57 [2021-10-13 08:14:11,413 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 [2021-10-13 08:14:11,414 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,415 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 08:14:11,415 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,416 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 08:14:11,416 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 08:14:11,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 08:14:11,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,441 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 08:14:11,443 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 54 [2021-10-13 08:14:11,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 08:14:11,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:55, output treesize:54 [2021-10-13 08:14:11,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:11,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:11,663 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: No corresponding IProgramVar for |v_#length_9| at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:83) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.constructTermVarsProc(BasicPredicateFactory.java:92) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.BasicPredicateFactory.newPredicate(BasicPredicateFactory.java:81) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.predicate(SymbolicTools.java:174) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:608) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:53) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:392) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-10-13 08:14:11,667 INFO L168 Benchmark]: Toolchain (without parser) took 2307.89 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 58.6 MB in the beginning and 88.2 MB in the end (delta: -29.6 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:11,667 INFO L168 Benchmark]: CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 74.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:11,668 INFO L168 Benchmark]: CACSL2BoogieTranslator took 289.08 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 74.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:11,669 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:11,669 INFO L168 Benchmark]: Boogie Preprocessor took 33.89 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:11,670 INFO L168 Benchmark]: RCFGBuilder took 356.18 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 62.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:11,671 INFO L168 Benchmark]: TraceAbstraction took 1570.27 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 61.7 MB in the beginning and 88.2 MB in the end (delta: -26.5 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:11,674 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31 ms. Allocated memory is still 98.6 MB. Free memory is still 74.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 289.08 ms. Allocated memory is still 98.6 MB. Free memory was 58.4 MB in the beginning and 74.3 MB in the end (delta: -15.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 45.87 ms. Allocated memory is still 98.6 MB. Free memory was 74.3 MB in the beginning and 73.1 MB in the end (delta: 1.2 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 33.89 ms. Allocated memory is still 98.6 MB. Free memory was 73.1 MB in the beginning and 71.8 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 356.18 ms. Allocated memory is still 98.6 MB. Free memory was 71.8 MB in the beginning and 62.2 MB in the end (delta: 9.6 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1570.27 ms. Allocated memory was 98.6 MB in the beginning and 127.9 MB in the end (delta: 29.4 MB). Free memory was 61.7 MB in the beginning and 88.2 MB in the end (delta: -26.5 MB). Peak memory consumption was 4.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: No corresponding IProgramVar for |v_#length_9| de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: No corresponding IProgramVar for |v_#length_9|: de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermVarsProc.computeTermVarsProc(TermVarsProc.java:97) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-10-13 08:14:11,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... ### Bit-precise run ### This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 08:14:14,581 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 08:14:14,583 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 08:14:14,636 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 08:14:14,637 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 08:14:14,643 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 08:14:14,645 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 08:14:14,651 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 08:14:14,654 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 08:14:14,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 08:14:14,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 08:14:14,668 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 08:14:14,668 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 08:14:14,669 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 08:14:14,671 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 08:14:14,678 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 08:14:14,680 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 08:14:14,682 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 08:14:14,684 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 08:14:14,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 08:14:14,694 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 08:14:14,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 08:14:14,700 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 08:14:14,704 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 08:14:14,711 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 08:14:14,711 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 08:14:14,712 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 08:14:14,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 08:14:14,715 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 08:14:14,716 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 08:14:14,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 08:14:14,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 08:14:14,722 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 08:14:14,723 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 08:14:14,725 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 08:14:14,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 08:14:14,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 08:14:14,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 08:14:14,727 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 08:14:14,729 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 08:14:14,730 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 08:14:14,731 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 08:14:14,788 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 08:14:14,789 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 08:14:14,791 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 08:14:14,791 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 08:14:14,791 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 08:14:14,791 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 08:14:14,792 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 08:14:14,792 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 08:14:14,793 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 08:14:14,795 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 08:14:14,796 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 08:14:14,797 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 08:14:14,797 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 08:14:14,797 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 08:14:14,797 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 08:14:14,798 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 08:14:14,798 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 08:14:14,798 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 08:14:14,798 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 08:14:14,799 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 08:14:14,799 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 08:14:14,799 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 08:14:14,799 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 08:14:14,800 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 08:14:14,800 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 08:14:14,800 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 08:14:14,800 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 08:14:14,801 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 08:14:14,801 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 08:14:14,801 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:14:14,801 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 08:14:14,802 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 08:14:14,802 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 08:14:14,802 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 08:14:14,803 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 08:14:14,803 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 08:14:14,803 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_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 89c40e0e226fdcfbda8631272bf2c238348d58a6 [2021-10-13 08:14:15,284 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 08:14:15,310 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 08:14:15,313 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 08:14:15,315 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 08:14:15,320 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 08:14:15,321 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/ldv-memsafety/memset2.c [2021-10-13 08:14:15,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/541f8911f/573c2383a2df46d688802e772edc0128/FLAG5fac03190 [2021-10-13 08:14:16,079 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 08:14:16,080 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/sv-benchmarks/c/ldv-memsafety/memset2.c [2021-10-13 08:14:16,088 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/541f8911f/573c2383a2df46d688802e772edc0128/FLAG5fac03190 [2021-10-13 08:14:16,444 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/data/541f8911f/573c2383a2df46d688802e772edc0128 [2021-10-13 08:14:16,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 08:14:16,452 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 08:14:16,455 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 08:14:16,455 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 08:14:16,460 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 08:14:16,461 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,464 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@c0324f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16, skipping insertion in model container [2021-10-13 08:14:16,465 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,475 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 08:14:16,492 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 08:14:16,721 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:14:16,745 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 08:14:16,769 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 08:14:16,792 INFO L208 MainTranslator]: Completed translation [2021-10-13 08:14:16,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16 WrapperNode [2021-10-13 08:14:16,793 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 08:14:16,794 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 08:14:16,795 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 08:14:16,795 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 08:14:16,804 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,814 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,886 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 08:14:16,889 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 08:14:16,890 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 08:14:16,891 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 08:14:16,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,913 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,914 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,932 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,936 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,937 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,939 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 08:14:16,940 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 08:14:16,941 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 08:14:16,941 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 08:14:16,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (1/1) ... [2021-10-13 08:14:16,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 08:14:16,968 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:16,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 08:14:17,029 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 08:14:17,062 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 08:14:17,062 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 08:14:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 08:14:17,063 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 08:14:17,377 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 08:14:17,378 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-10-13 08:14:17,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:14:17 BoogieIcfgContainer [2021-10-13 08:14:17,380 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 08:14:17,382 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 08:14:17,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 08:14:17,402 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 08:14:17,403 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 08:14:16" (1/3) ... [2021-10-13 08:14:17,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e447e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:14:17, skipping insertion in model container [2021-10-13 08:14:17,404 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 08:14:16" (2/3) ... [2021-10-13 08:14:17,404 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4e447e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 08:14:17, skipping insertion in model container [2021-10-13 08:14:17,405 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:14:17" (3/3) ... [2021-10-13 08:14:17,406 INFO L111 eAbstractionObserver]: Analyzing ICFG memset2.c [2021-10-13 08:14:17,413 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 08:14:17,413 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-10-13 08:14:17,497 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 08:14:17,505 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, mConcurrency=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 [2021-10-13 08:14:17,506 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-13 08:14:17,522 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 8 states have (on average 1.5) internal successors, (12), 11 states have internal predecessors, (12), 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) [2021-10-13 08:14:17,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 08:14:17,529 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:17,530 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 08:14:17,531 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:17,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:17,538 INFO L82 PathProgramCache]: Analyzing trace with hash 29856, now seen corresponding path program 1 times [2021-10-13 08:14:17,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:17,552 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1903497776] [2021-10-13 08:14:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:17,554 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:17,554 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:17,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:17,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 08:14:17,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:17,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:14:17,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:17,758 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 [2021-10-13 08:14:17,790 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:17,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:17,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:17,841 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:17,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1903497776] [2021-10-13 08:14:17,843 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1903497776] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:17,844 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:17,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 08:14:17,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49998362] [2021-10-13 08:14:17,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 08:14:17,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:17,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 08:14:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:17,880 INFO L87 Difference]: Start difference. First operand has 12 states, 8 states have (on average 1.5) internal successors, (12), 11 states have internal predecessors, (12), 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-10-13 08:14:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:17,954 INFO L93 Difference]: Finished difference Result 11 states and 11 transitions. [2021-10-13 08:14:17,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:14:17,956 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) Word has length 3 [2021-10-13 08:14:17,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:17,970 INFO L225 Difference]: With dead ends: 11 [2021-10-13 08:14:17,970 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 08:14:17,972 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 08:14:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 08:14:18,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 08:14:18,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 8 states have internal predecessors, (9), 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) [2021-10-13 08:14:18,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 08:14:18,006 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 3 [2021-10-13 08:14:18,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:18,007 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 08:14:18,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 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) [2021-10-13 08:14:18,008 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 08:14:18,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 08:14:18,009 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:18,009 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 08:14:18,022 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Ended with exit code 0 [2021-10-13 08:14:18,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:14:18,222 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 925572, now seen corresponding path program 1 times [2021-10-13 08:14:18,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:18,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [55405178] [2021-10-13 08:14:18,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:18,224 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:18,225 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:18,230 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:18,234 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 08:14:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:18,276 INFO L263 TraceCheckSpWp]: Trace formula consists of 20 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:14:18,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:18,319 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 [2021-10-13 08:14:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:18,372 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:18,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:18,494 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:18,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [55405178] [2021-10-13 08:14:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [55405178] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:18,495 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:18,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 08:14:18,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505678424] [2021-10-13 08:14:18,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 08:14:18,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:18,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 08:14:18,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:14:18,499 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-13 08:14:18,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:18,533 INFO L93 Difference]: Finished difference Result 8 states and 8 transitions. [2021-10-13 08:14:18,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 08:14:18,535 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) Word has length 4 [2021-10-13 08:14:18,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:18,535 INFO L225 Difference]: With dead ends: 8 [2021-10-13 08:14:18,536 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 08:14:18,536 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.5ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 08:14:18,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 08:14:18,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 08:14:18,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 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) [2021-10-13 08:14:18,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-13 08:14:18,544 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 4 [2021-10-13 08:14:18,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:18,545 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-13 08:14:18,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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) [2021-10-13 08:14:18,545 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-13 08:14:18,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 08:14:18,546 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:18,546 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:18,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:18,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:14:18,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:18,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:18,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1803953449, now seen corresponding path program 1 times [2021-10-13 08:14:18,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:18,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [495123939] [2021-10-13 08:14:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:18,759 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:18,759 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:18,760 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:18,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 08:14:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:18,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 08:14:18,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:18,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:18,873 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:18,927 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:18,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [495123939] [2021-10-13 08:14:18,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [495123939] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:18,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:18,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 6 [2021-10-13 08:14:18,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796089305] [2021-10-13 08:14:18,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 08:14:18,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 08:14:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 08:14:18,931 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-10-13 08:14:18,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:18,968 INFO L93 Difference]: Finished difference Result 10 states and 10 transitions. [2021-10-13 08:14:18,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:14:18,969 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) Word has length 7 [2021-10-13 08:14:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:18,970 INFO L225 Difference]: With dead ends: 10 [2021-10-13 08:14:18,970 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 08:14:18,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 39.6ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:14:18,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 08:14:18,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 08:14:18,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 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) [2021-10-13 08:14:18,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 08:14:18,974 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2021-10-13 08:14:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:18,975 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 08:14:18,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 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) [2021-10-13 08:14:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 08:14:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 08:14:18,976 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:18,976 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:18,990 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:19,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:14:19,190 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:19,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:19,191 INFO L82 PathProgramCache]: Analyzing trace with hash -1569492695, now seen corresponding path program 1 times [2021-10-13 08:14:19,191 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:19,191 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [355266815] [2021-10-13 08:14:19,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:19,192 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:19,192 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:19,193 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:19,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-13 08:14:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:14:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:19,361 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:19,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:19,517 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:19,517 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [355266815] [2021-10-13 08:14:19,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [355266815] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:19,518 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [620644354] [2021-10-13 08:14:19,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:19,518 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 08:14:19,519 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 08:14:19,524 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 08:14:19,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-10-13 08:14:19,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:19,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:14:19,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:19,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:19,817 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:19,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [620644354] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:19,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702332034] [2021-10-13 08:14:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 08:14:19,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 08:14:19,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 08:14:19,821 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 08:14:19,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 08:14:19,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 08:14:19,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 34 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 08:14:19,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:19,998 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:19,998 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 08:14:20,053 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702332034] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 08:14:20,053 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 08:14:20,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6, 6, 6, 6] total 10 [2021-10-13 08:14:20,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083421068] [2021-10-13 08:14:20,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 08:14:20,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:20,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 08:14:20,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-10-13 08:14:20,062 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-13 08:14:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:20,233 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-13 08:14:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 08:14:20,235 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) Word has length 9 [2021-10-13 08:14:20,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:20,235 INFO L225 Difference]: With dead ends: 14 [2021-10-13 08:14:20,236 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 08:14:20,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 223.8ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-10-13 08:14:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 08:14:20,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 08:14:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 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) [2021-10-13 08:14:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-13 08:14:20,241 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2021-10-13 08:14:20,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:20,241 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-13 08:14:20,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 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) [2021-10-13 08:14:20,242 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-13 08:14:20,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 08:14:20,243 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 08:14:20,243 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 08:14:20,261 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:20,480 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:20,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:20,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 08:14:20,855 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK] === [2021-10-13 08:14:20,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 08:14:20,856 INFO L82 PathProgramCache]: Analyzing trace with hash -89847511, now seen corresponding path program 2 times [2021-10-13 08:14:20,856 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 08:14:20,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1276728420] [2021-10-13 08:14:20,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 08:14:20,857 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 08:14:20,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 08:14:20,874 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 08:14:20,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-13 08:14:20,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2021-10-13 08:14:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 08:14:20,993 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 08:14:20,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 08:14:21,014 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 [2021-10-13 08:14:21,316 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 08:14:21,316 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 08:14:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-10-13 08:14:21,416 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 08:14:21,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1276728420] [2021-10-13 08:14:21,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1276728420] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 08:14:21,418 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 08:14:21,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 6 [2021-10-13 08:14:21,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375990102] [2021-10-13 08:14:21,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 08:14:21,420 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 08:14:21,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 08:14:21,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-10-13 08:14:21,422 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-10-13 08:14:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 08:14:21,497 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-13 08:14:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 08:14:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) Word has length 13 [2021-10-13 08:14:21,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 08:14:21,498 INFO L225 Difference]: With dead ends: 13 [2021-10-13 08:14:21,498 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 08:14:21,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 87.9ms TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-10-13 08:14:21,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 08:14:21,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 08:14:21,499 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) [2021-10-13 08:14:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 08:14:21,500 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2021-10-13 08:14:21,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 08:14:21,500 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 08:14:21,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 7 states have internal predecessors, (16), 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) [2021-10-13 08:14:21,500 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 08:14:21,500 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 08:14:21,503 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 08:14:21,511 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_DEREFERENCE [2021-10-13 08:14:21,511 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 08:14:21,532 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-13 08:14:21,722 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 08:14:21,728 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 08:14:21,730 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 08:14:21 BoogieIcfgContainer [2021-10-13 08:14:21,730 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 08:14:21,731 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 08:14:21,731 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 08:14:21,731 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 08:14:21,734 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 08:14:17" (3/4) ... [2021-10-13 08:14:21,739 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 08:14:21,753 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2021-10-13 08:14:21,754 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2021-10-13 08:14:21,754 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 08:14:21,755 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 08:14:21,806 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 08:14:21,807 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 08:14:21,809 INFO L168 Benchmark]: Toolchain (without parser) took 5356.26 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 47.4 MB in the beginning and 68.6 MB in the end (delta: -21.2 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:21,810 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory is still 32.7 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:21,810 INFO L168 Benchmark]: CACSL2BoogieTranslator took 338.56 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 38.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:21,811 INFO L168 Benchmark]: Boogie Procedure Inliner took 92.11 ms. Allocated memory is still 69.2 MB. Free memory was 38.4 MB in the beginning and 53.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:21,812 INFO L168 Benchmark]: Boogie Preprocessor took 50.33 ms. Allocated memory is still 69.2 MB. Free memory was 53.0 MB in the beginning and 52.0 MB in the end (delta: 972.4 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 08:14:21,812 INFO L168 Benchmark]: RCFGBuilder took 439.97 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 43.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:21,813 INFO L168 Benchmark]: TraceAbstraction took 4347.97 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 42.8 MB in the beginning and 71.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:21,815 INFO L168 Benchmark]: Witness Printer took 76.19 ms. Allocated memory is still 90.2 MB. Free memory was 71.2 MB in the beginning and 68.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 08:14:21,819 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 52.4 MB. Free memory is still 32.7 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 338.56 ms. Allocated memory is still 69.2 MB. Free memory was 47.3 MB in the beginning and 38.4 MB in the end (delta: 8.9 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 92.11 ms. Allocated memory is still 69.2 MB. Free memory was 38.4 MB in the beginning and 53.0 MB in the end (delta: -14.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 50.33 ms. Allocated memory is still 69.2 MB. Free memory was 53.0 MB in the beginning and 52.0 MB in the end (delta: 972.4 kB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 439.97 ms. Allocated memory is still 69.2 MB. Free memory was 51.8 MB in the beginning and 43.3 MB in the end (delta: 8.4 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4347.97 ms. Allocated memory was 69.2 MB in the beginning and 90.2 MB in the end (delta: 21.0 MB). Free memory was 42.8 MB in the beginning and 71.2 MB in the end (delta: -28.3 MB). Peak memory consumption was 32.2 MB. Max. memory is 16.1 GB. * Witness Printer took 76.19 ms. Allocated memory is still 90.2 MB. Free memory was 71.2 MB in the beginning and 68.6 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 20]: 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 1 procedures, 12 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 4232.7ms, OverallIterations: 5, TraceHistogramMax: 6, EmptinessCheckTime: 14.4ms, AutomataDifference: 452.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 11.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 23 SDtfs, 29 SDslu, 33 SDs, 0 SdLazy, 63 SolverSat, 16 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 170.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 99 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 426.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=14occurred in iteration=4, InterpolantAutomatonStates: 25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 31.8ms AutomataMinimizationTime, 5 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 66.2ms SsaConstructionTime, 120.7ms SatisfiabilityAnalysisTime, 1541.1ms InterpolantComputationTime, 54 NumberOfCodeBlocks, 48 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 94 ConstructedInterpolants, 1 QuantifiedInterpolants, 525 SizeOfPredicates, 11 NumberOfNonLiveVariables, 201 ConjunctsInSsa, 33 ConjunctsInUnsatCore, 14 InterpolantComputations, 8 PerfectInterpolantSequences, 42/60 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-13 08:14:21,868 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_68812471-7dbe-4395-8a56-925930020e2e/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...