./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.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_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/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_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/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_031d0150-5c32-4020-8db7-345061c81787/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 ........................................................................................................................................................................................................................................................................................................................................................................................................................................ 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_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/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_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/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_031d0150-5c32-4020-8db7-345061c81787/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 44834c55142a76240cb3980fc2bb6f5aeaa27c83 .................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-deref) --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 07:51:39,552 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:51:39,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:51:39,602 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:51:39,602 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:51:39,609 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:51:39,611 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:51:39,615 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:51:39,617 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:51:39,623 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:51:39,624 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:51:39,626 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:51:39,627 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:51:39,630 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:51:39,632 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:51:39,638 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:51:39,639 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:51:39,640 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:51:39,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:51:39,646 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:51:39,648 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:51:39,650 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:51:39,651 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:51:39,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:51:39,656 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:51:39,657 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:51:39,658 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:51:39,659 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:51:39,659 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:51:39,661 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:51:39,661 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:51:39,662 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:51:39,663 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:51:39,664 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:51:39,665 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:51:39,666 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:51:39,667 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:51:39,667 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:51:39,667 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:51:39,668 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:51:39,669 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:51:39,670 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-13 07:51:39,702 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:51:39,703 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:51:39,703 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:51:39,704 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:51:39,704 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:51:39,704 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:51:39,704 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-13 07:51:39,705 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:51:39,705 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:51:39,705 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-13 07:51:39,705 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-13 07:51:39,712 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:51:39,712 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-13 07:51:39,713 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-13 07:51:39,713 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-13 07:51:39,714 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:51:39,715 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:51:39,715 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:51:39,715 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:51:39,716 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:51:39,716 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:51:39,716 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:51:39,716 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:51:39,717 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:51:39,717 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:51:39,718 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:51:39,720 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:51:39,720 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:51:39,721 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:51:39,721 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:51:39,722 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:51:39,722 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:51:39,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:51:39,723 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:51:39,723 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:51:39,723 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-13 07:51:39,725 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 07:51:39,725 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:51:39,725 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:51:39,726 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_031d0150-5c32-4020-8db7-345061c81787/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2021-10-13 07:51:40,018 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:51:40,063 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:51:40,066 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:51:40,067 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:51:40,068 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:51:40,069 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-13 07:51:40,148 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/4622429bd/5929a9415db0431aa50c75c54b891da4/FLAG081e5a13c [2021-10-13 07:51:40,620 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:51:40,621 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-13 07:51:40,629 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/4622429bd/5929a9415db0431aa50c75c54b891da4/FLAG081e5a13c [2021-10-13 07:51:41,003 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/4622429bd/5929a9415db0431aa50c75c54b891da4 [2021-10-13 07:51:41,006 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:51:41,007 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:51:41,009 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:51:41,009 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:51:41,013 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:51:41,013 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@b460619 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41, skipping insertion in model container [2021-10-13 07:51:41,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,022 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:51:41,034 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:51:41,238 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:51:41,247 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:51:41,262 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:51:41,276 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:51:41,277 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41 WrapperNode [2021-10-13 07:51:41,277 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:51:41,278 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:51:41,279 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:51:41,279 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:51:41,287 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,294 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,312 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:51:41,313 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:51:41,313 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:51:41,313 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:51:41,321 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,321 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,323 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,323 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,327 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,331 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,332 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,333 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:51:41,334 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:51:41,335 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:51:41,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:51:41,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (1/1) ... [2021-10-13 07:51:41,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:51:41,368 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:41,401 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:51:41,423 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:51:41,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-13 07:51:41,460 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:51:41,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:51:41,461 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:51:41,461 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:51:41,684 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:51:41,685 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-13 07:51:41,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:51:41 BoogieIcfgContainer [2021-10-13 07:51:41,688 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:51:41,690 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:51:41,690 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:51:41,694 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:51:41,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:51:41" (1/3) ... [2021-10-13 07:51:41,695 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d9a1b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:51:41, skipping insertion in model container [2021-10-13 07:51:41,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:41" (2/3) ... [2021-10-13 07:51:41,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d9a1b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:51:41, skipping insertion in model container [2021-10-13 07:51:41,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:51:41" (3/3) ... [2021-10-13 07:51:41,698 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2021-10-13 07:51:41,708 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:51:41,708 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:51:41,775 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:51:41,782 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 07:51:41,782 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:51:41,797 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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 07:51:41,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:51:41,803 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:41,804 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:51:41,805 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:41,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:41,811 INFO L82 PathProgramCache]: Analyzing trace with hash 64636, now seen corresponding path program 1 times [2021-10-13 07:51:41,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:51:41,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035518407] [2021-10-13 07:51:41,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:41,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:51:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:41,966 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 07:51:41,967 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:51:41,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035518407] [2021-10-13 07:51:41,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035518407] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:41,968 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:51:41,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 07:51:41,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273061031] [2021-10-13 07:51:41,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:41,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:51:41,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:41,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:41,994 INFO L87 Difference]: Start difference. First operand has 16 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 15 states have internal predecessors, (17), 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, 3 states have (on average 1.0) 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 07:51:42,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:42,038 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-13 07:51:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:42,040 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.0) 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 07:51:42,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:42,049 INFO L225 Difference]: With dead ends: 22 [2021-10-13 07:51:42,049 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:51:42,066 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 6.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:42,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:51:42,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 18. [2021-10-13 07:51:42,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 12 states have (on average 1.75) internal successors, (21), 17 states have internal predecessors, (21), 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 07:51:42,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2021-10-13 07:51:42,113 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 3 [2021-10-13 07:51:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:42,114 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2021-10-13 07:51:42,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.0) 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 07:51:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2021-10-13 07:51:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:51:42,115 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:42,115 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:51:42,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 07:51:42,124 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:42,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:42,125 INFO L82 PathProgramCache]: Analyzing trace with hash 63748, now seen corresponding path program 1 times [2021-10-13 07:51:42,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:51:42,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825147326] [2021-10-13 07:51:42,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:42,127 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:51:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:42,196 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 07:51:42,196 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:51:42,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825147326] [2021-10-13 07:51:42,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825147326] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:42,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:51:42,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:51:42,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85486158] [2021-10-13 07:51:42,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:42,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:51:42,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:42,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:42,202 INFO L87 Difference]: Start difference. First operand 18 states and 21 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 07:51:42,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:42,268 INFO L93 Difference]: Finished difference Result 23 states and 25 transitions. [2021-10-13 07:51:42,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:42,269 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 07:51:42,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:42,270 INFO L225 Difference]: With dead ends: 23 [2021-10-13 07:51:42,270 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:51:42,271 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.1ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:42,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:51:42,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 20. [2021-10-13 07:51:42,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.6) internal successors, (24), 19 states have internal predecessors, (24), 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 07:51:42,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2021-10-13 07:51:42,275 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 3 [2021-10-13 07:51:42,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:42,276 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2021-10-13 07:51:42,276 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 07:51:42,276 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2021-10-13 07:51:42,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2021-10-13 07:51:42,277 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:42,277 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1] [2021-10-13 07:51:42,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 07:51:42,278 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:42,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:42,292 INFO L82 PathProgramCache]: Analyzing trace with hash 63749, now seen corresponding path program 1 times [2021-10-13 07:51:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:51:42,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164524200] [2021-10-13 07:51:42,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:42,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:51:42,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:42,408 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 07:51:42,410 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:51:42,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164524200] [2021-10-13 07:51:42,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164524200] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:42,422 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:51:42,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-13 07:51:42,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347977331] [2021-10-13 07:51:42,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:42,424 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-13 07:51:42,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:42,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:42,432 INFO L87 Difference]: Start difference. First operand 20 states and 24 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 07:51:42,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:42,481 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2021-10-13 07:51:42,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:42,482 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 07:51:42,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:42,483 INFO L225 Difference]: With dead ends: 21 [2021-10-13 07:51:42,483 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 07:51:42,483 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:42,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 07:51:42,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2021-10-13 07:51:42,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 19 states have internal predecessors, (23), 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 07:51:42,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-10-13 07:51:42,499 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 3 [2021-10-13 07:51:42,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:42,499 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-10-13 07:51:42,500 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 07:51:42,501 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-10-13 07:51:42,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 07:51:42,502 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:42,502 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:51:42,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-13 07:51:42,503 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:42,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:42,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1257107777, now seen corresponding path program 1 times [2021-10-13 07:51:42,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-13 07:51:42,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206216023] [2021-10-13 07:51:42,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:42,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 07:51:42,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:42,574 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 07:51:42,574 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-13 07:51:42,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206216023] [2021-10-13 07:51:42,576 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206216023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 07:51:42,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055460201] [2021-10-13 07:51:42,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:42,583 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:42,583 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:42,588 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:51:42,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 07:51:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:42,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 31 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:51:42,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:42,735 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 07:51:42,735 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:42,792 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 07:51:42,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055460201] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:42,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1570961288] [2021-10-13 07:51:42,829 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2021-10-13 07:51:42,829 INFO L166 IcfgInterpreter]: Building call graph [2021-10-13 07:51:42,835 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-10-13 07:51:42,842 INFO L176 IcfgInterpreter]: Starting interpretation [2021-10-13 07:51:42,843 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-10-13 07:51:42,896 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:42,901 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:51:42,902 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:42,903 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:51:42,904 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-10-13 07:51:42,905 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:42,906 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-10-13 07:51:42,914 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 48 [2021-10-13 07:51:42,964 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 07:51:42,965 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:42,966 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:51:42,967 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:42,969 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-10-13 07:51:42,969 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-10-13 07:51:42,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 07:51:43,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:43,012 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-13 07:51:43,015 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-10-13 07:51:43,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-10-13 07:51:43,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:46, output treesize:45 [2021-10-13 07:51:43,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:43,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:43,234 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 07:51:43,239 INFO L168 Benchmark]: Toolchain (without parser) took 2230.91 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 89.9 MB in the beginning and 102.2 MB in the end (delta: -12.3 MB). Peak memory consumption was 13.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:51:43,239 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 119.5 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:51:43,240 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.63 ms. Allocated memory is still 119.5 MB. Free memory was 89.9 MB in the beginning and 94.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:51:43,240 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.68 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 93.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:51:43,241 INFO L168 Benchmark]: Boogie Preprocessor took 20.96 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 92.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:51:43,241 INFO L168 Benchmark]: RCFGBuilder took 353.46 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 82.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-13 07:51:43,242 INFO L168 Benchmark]: TraceAbstraction took 1547.37 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 81.7 MB in the beginning and 102.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 6.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:51:43,245 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 119.5 MB. Free memory is still 75.9 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 268.63 ms. Allocated memory is still 119.5 MB. Free memory was 89.9 MB in the beginning and 94.2 MB in the end (delta: -4.3 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.68 ms. Allocated memory is still 119.5 MB. Free memory was 94.2 MB in the beginning and 93.1 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 20.96 ms. Allocated memory is still 119.5 MB. Free memory was 93.1 MB in the beginning and 92.0 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.1 GB. * RCFGBuilder took 353.46 ms. Allocated memory is still 119.5 MB. Free memory was 92.0 MB in the beginning and 82.3 MB in the end (delta: 9.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1547.37 ms. Allocated memory was 119.5 MB in the beginning and 144.7 MB in the end (delta: 25.2 MB). Free memory was 81.7 MB in the beginning and 102.2 MB in the end (delta: -20.5 MB). Peak memory consumption was 6.4 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 07:51:43,302 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/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 07:51:45,941 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 07:51:45,943 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 07:51:45,980 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 07:51:45,981 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 07:51:45,982 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 07:51:45,984 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 07:51:45,987 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 07:51:45,989 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 07:51:45,990 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 07:51:45,992 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 07:51:45,993 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 07:51:45,994 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 07:51:45,995 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 07:51:45,997 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 07:51:45,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 07:51:45,999 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 07:51:46,001 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 07:51:46,004 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 07:51:46,008 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 07:51:46,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 07:51:46,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 07:51:46,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 07:51:46,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 07:51:46,020 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 07:51:46,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 07:51:46,021 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 07:51:46,022 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 07:51:46,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 07:51:46,024 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 07:51:46,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 07:51:46,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 07:51:46,026 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 07:51:46,027 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 07:51:46,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 07:51:46,029 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 07:51:46,030 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 07:51:46,030 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 07:51:46,031 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 07:51:46,032 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 07:51:46,033 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 07:51:46,034 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-13 07:51:46,065 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 07:51:46,066 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 07:51:46,066 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-13 07:51:46,066 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-13 07:51:46,067 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-13 07:51:46,067 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-13 07:51:46,067 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-13 07:51:46,067 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-13 07:51:46,067 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-13 07:51:46,067 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 07:51:46,068 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 07:51:46,068 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-13 07:51:46,069 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-13 07:51:46,070 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-13 07:51:46,070 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 07:51:46,070 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 07:51:46,070 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 07:51:46,071 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 07:51:46,071 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 07:51:46,071 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:51:46,071 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 07:51:46,071 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 07:51:46,072 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-13 07:51:46,072 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:46,072 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 07:51:46,072 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-13 07:51:46,072 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_031d0150-5c32-4020-8db7-345061c81787/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 44834c55142a76240cb3980fc2bb6f5aeaa27c83 [2021-10-13 07:51:46,481 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 07:51:46,507 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 07:51:46,510 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 07:51:46,512 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 07:51:46,513 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 07:51:46,514 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/../../sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-13 07:51:46,583 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/b53a4a2e4/07a20b2e5ef04bb99d6407592531195b/FLAGefd930e4f [2021-10-13 07:51:47,222 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 07:51:47,223 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/sv-benchmarks/c/memsafety-ext3/derefAfterFree2.c [2021-10-13 07:51:47,230 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/b53a4a2e4/07a20b2e5ef04bb99d6407592531195b/FLAGefd930e4f [2021-10-13 07:51:47,575 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/data/b53a4a2e4/07a20b2e5ef04bb99d6407592531195b [2021-10-13 07:51:47,577 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 07:51:47,579 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 07:51:47,581 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 07:51:47,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 07:51:47,586 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 07:51:47,588 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,589 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3bbd7082 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47, skipping insertion in model container [2021-10-13 07:51:47,589 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,598 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 07:51:47,630 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 07:51:47,766 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:51:47,784 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 07:51:47,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 07:51:47,827 INFO L208 MainTranslator]: Completed translation [2021-10-13 07:51:47,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47 WrapperNode [2021-10-13 07:51:47,828 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 07:51:47,829 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 07:51:47,829 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 07:51:47,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 07:51:47,837 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,847 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,873 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 07:51:47,874 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 07:51:47,874 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 07:51:47,874 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 07:51:47,912 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,921 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,925 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,926 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,936 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 07:51:47,937 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 07:51:47,937 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 07:51:47,937 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 07:51:47,938 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (1/1) ... [2021-10-13 07:51:47,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 07:51:47,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:47,978 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 07:51:47,997 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 07:51:48,034 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-13 07:51:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 07:51:48,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 07:51:48,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-13 07:51:48,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-13 07:51:48,372 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 07:51:48,372 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2021-10-13 07:51:48,374 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:51:48 BoogieIcfgContainer [2021-10-13 07:51:48,375 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 07:51:48,377 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 07:51:48,385 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 07:51:48,388 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 07:51:48,388 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 07:51:47" (1/3) ... [2021-10-13 07:51:48,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abf8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:51:48, skipping insertion in model container [2021-10-13 07:51:48,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 07:51:47" (2/3) ... [2021-10-13 07:51:48,390 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44abf8a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 07:51:48, skipping insertion in model container [2021-10-13 07:51:48,390 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:51:48" (3/3) ... [2021-10-13 07:51:48,392 INFO L111 eAbstractionObserver]: Analyzing ICFG derefAfterFree2.c [2021-10-13 07:51:48,398 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 07:51:48,412 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2021-10-13 07:51:48,487 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 07:51:48,494 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 07:51:48,508 INFO L340 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-10-13 07:51:48,525 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 12 states have (on average 1.75) internal successors, (21), 18 states have internal predecessors, (21), 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 07:51:48,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:51:48,531 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:48,532 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:51:48,532 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:48,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:48,541 INFO L82 PathProgramCache]: Analyzing trace with hash 925765, now seen corresponding path program 1 times [2021-10-13 07:51:48,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:48,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1498497355] [2021-10-13 07:51:48,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:48,563 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:48,563 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:48,571 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:48,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-13 07:51:48,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:48,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:51:48,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:48,760 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 07:51:48,797 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 07:51:48,798 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:48,827 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 07:51:48,828 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:48,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1498497355] [2021-10-13 07:51:48,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1498497355] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:48,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:51:48,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-13 07:51:48,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118932913] [2021-10-13 07:51:48,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:48,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:48,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:48,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:48,865 INFO L87 Difference]: Start difference. First operand has 19 states, 12 states have (on average 1.75) internal successors, (21), 18 states have internal predecessors, (21), 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 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 07:51:48,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:48,948 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-13 07:51:48,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:48,951 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 07:51:48,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:48,962 INFO L225 Difference]: With dead ends: 27 [2021-10-13 07:51:48,962 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 07:51:48,964 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 07:51:48,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 07:51:48,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 19. [2021-10-13 07:51:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.5714285714285714) internal successors, (22), 18 states have internal predecessors, (22), 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 07:51:48,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2021-10-13 07:51:48,998 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 4 [2021-10-13 07:51:48,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:48,999 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2021-10-13 07:51:48,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 07:51:48,999 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2021-10-13 07:51:49,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-13 07:51:49,000 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:49,000 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-13 07:51:49,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:49,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:51:49,213 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:49,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:49,214 INFO L82 PathProgramCache]: Analyzing trace with hash 925766, now seen corresponding path program 1 times [2021-10-13 07:51:49,215 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:49,215 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [722128825] [2021-10-13 07:51:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:49,216 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:49,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:49,218 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:49,220 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-13 07:51:49,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:49,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 16 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 07:51:49,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:49,287 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 07:51:49,402 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 07:51:49,403 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:49,570 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 07:51:49,570 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:49,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [722128825] [2021-10-13 07:51:49,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [722128825] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:49,571 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-13 07:51:49,571 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-13 07:51:49,571 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897510541] [2021-10-13 07:51:49,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 07:51:49,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:49,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 07:51:49,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:51:49,574 INFO L87 Difference]: Start difference. First operand 19 states and 22 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 07:51:49,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:49,745 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2021-10-13 07:51:49,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 07:51:49,746 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 07:51:49,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:49,747 INFO L225 Difference]: With dead ends: 28 [2021-10-13 07:51:49,748 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 07:51:49,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 98.1ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 07:51:49,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 07:51:49,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 25. [2021-10-13 07:51:49,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.45) internal successors, (29), 24 states have internal predecessors, (29), 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 07:51:49,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2021-10-13 07:51:49,753 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 4 [2021-10-13 07:51:49,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:49,753 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2021-10-13 07:51:49,754 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 07:51:49,754 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2021-10-13 07:51:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 07:51:49,754 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:49,755 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:51:49,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:49,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:51:49,966 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:49,967 INFO L82 PathProgramCache]: Analyzing trace with hash -382889532, now seen corresponding path program 1 times [2021-10-13 07:51:49,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:49,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021509823] [2021-10-13 07:51:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:49,969 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:49,969 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:49,970 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:49,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-13 07:51:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:50,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:51:50,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:50,099 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 07:51:50,099 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:50,183 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 07:51:50,183 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:50,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021509823] [2021-10-13 07:51:50,184 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1021509823] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:50,184 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1063140124] [2021-10-13 07:51:50,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:50,185 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:50,185 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:51:50,213 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:51:50,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Waiting until timeout for monitored process [2021-10-13 07:51:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:50,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:51:50,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:50,374 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 07:51:50,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:50,413 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 07:51:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1063140124] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:50,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1949621611] [2021-10-13 07:51:50,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:50,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:50,415 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:50,417 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:51:50,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 07:51:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:50,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 07:51:50,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:50,546 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 07:51:50,546 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:50,586 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 07:51:50,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1949621611] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:50,587 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:51:50,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 6 [2021-10-13 07:51:50,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826493325] [2021-10-13 07:51:50,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 07:51:50,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:50,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 07:51:50,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-10-13 07:51:50,593 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:51:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:50,708 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2021-10-13 07:51:50,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 07:51:50,709 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:51:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:50,710 INFO L225 Difference]: With dead ends: 33 [2021-10-13 07:51:50,710 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 07:51:50,710 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-13 07:51:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 07:51:50,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2021-10-13 07:51:50,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 31 states have internal predecessors, (36), 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 07:51:50,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2021-10-13 07:51:50,715 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 9 [2021-10-13 07:51:50,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:50,715 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2021-10-13 07:51:50,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 6 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 07:51:50,730 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2021-10-13 07:51:50,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 07:51:50,732 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:50,732 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1] [2021-10-13 07:51:50,772 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:50,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:51,134 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (5)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:51,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:51,333 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:51,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:51,334 INFO L82 PathProgramCache]: Analyzing trace with hash 810588748, now seen corresponding path program 1 times [2021-10-13 07:51:51,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:51,335 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1461329849] [2021-10-13 07:51:51,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:51,335 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:51,335 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:51,345 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:51,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-13 07:51:51,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:51,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:51:51,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:51,440 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 07:51:51,738 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:51,739 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:52,444 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:52,444 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:52,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1461329849] [2021-10-13 07:51:52,445 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1461329849] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:52,445 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1187557584] [2021-10-13 07:51:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:52,446 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:52,446 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:51:52,447 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:51:52,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Waiting until timeout for monitored process [2021-10-13 07:51:52,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:52,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:51:52,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:52,592 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 07:51:52,756 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:52,756 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:53,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1187557584] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:53,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052120502] [2021-10-13 07:51:53,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:53,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:53,115 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:53,116 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:51:53,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 07:51:53,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:53,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:51:53,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:53,246 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 07:51:53,380 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:53,380 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:53,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052120502] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:53,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:51:53,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4, 4, 4, 4] total 7 [2021-10-13 07:51:53,740 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782369988] [2021-10-13 07:51:53,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 07:51:53,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:53,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 07:51:53,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-10-13 07:51:53,742 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 07:51:54,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:54,821 INFO L93 Difference]: Finished difference Result 65 states and 69 transitions. [2021-10-13 07:51:54,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:51:54,822 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 12 [2021-10-13 07:51:54,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:54,825 INFO L225 Difference]: With dead ends: 65 [2021-10-13 07:51:54,825 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 07:51:54,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 1011.9ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-10-13 07:51:54,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 07:51:54,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 53. [2021-10-13 07:51:54,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 52 states have internal predecessors, (65), 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 07:51:54,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-10-13 07:51:54,835 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 12 [2021-10-13 07:51:54,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:54,836 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-10-13 07:51:54,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 8 states have internal predecessors, (23), 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 07:51:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-10-13 07:51:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 07:51:54,837 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:54,837 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1] [2021-10-13 07:51:54,851 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (7)] Ended with exit code 0 [2021-10-13 07:51:55,052 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (8)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:55,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:55,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:55,452 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:55,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:55,453 INFO L82 PathProgramCache]: Analyzing trace with hash -1461083186, now seen corresponding path program 1 times [2021-10-13 07:51:55,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:55,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1650624507] [2021-10-13 07:51:55,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:55,454 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:55,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:55,455 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:55,456 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-13 07:51:55,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:55,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:51:55,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:55,659 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:55,775 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:55,775 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:55,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1650624507] [2021-10-13 07:51:55,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1650624507] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:55,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1487877915] [2021-10-13 07:51:55,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:55,776 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:55,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:51:55,778 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:51:55,812 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Waiting until timeout for monitored process [2021-10-13 07:51:55,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:55,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 46 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:51:55,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:56,043 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 07:51:56,043 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:56,104 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 07:51:56,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1487877915] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:56,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:51:56,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 11 [2021-10-13 07:51:56,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562276001] [2021-10-13 07:51:56,105 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:56,105 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:56,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:56,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:51:56,107 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 07:51:56,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:56,121 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2021-10-13 07:51:56,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:56,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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) Word has length 18 [2021-10-13 07:51:56,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:56,124 INFO L225 Difference]: With dead ends: 52 [2021-10-13 07:51:56,124 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 07:51:56,124 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:51:56,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 07:51:56,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 07:51:56,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 48 states have (on average 1.2916666666666667) internal successors, (62), 51 states have internal predecessors, (62), 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 07:51:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2021-10-13 07:51:56,132 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 18 [2021-10-13 07:51:56,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:56,133 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2021-10-13 07:51:56,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 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 07:51:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2021-10-13 07:51:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 07:51:56,134 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:56,134 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1] [2021-10-13 07:51:56,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:56,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (11)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:56,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:56,548 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:56,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1951061540, now seen corresponding path program 1 times [2021-10-13 07:51:56,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:56,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [93535630] [2021-10-13 07:51:56,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:56,549 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:56,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:56,551 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:56,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Waiting until timeout for monitored process [2021-10-13 07:51:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:56,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 07:51:56,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:56,788 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:56,897 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:56,897 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:56,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [93535630] [2021-10-13 07:51:56,897 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [93535630] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:56,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [72256518] [2021-10-13 07:51:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:51:56,898 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:56,898 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:51:56,902 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:51:56,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Waiting until timeout for monitored process [2021-10-13 07:51:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 07:51:57,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-13 07:51:57,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:57,191 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 07:51:57,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:57,286 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 07:51:57,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [72256518] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-13 07:51:57,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 2 imperfect interpolant sequences. [2021-10-13 07:51:57,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [6, 6] total 11 [2021-10-13 07:51:57,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824406780] [2021-10-13 07:51:57,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 07:51:57,288 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:57,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 07:51:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:51:57,289 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 07:51:57,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:51:57,326 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2021-10-13 07:51:57,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 07:51:57,327 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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) Word has length 19 [2021-10-13 07:51:57,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:51:57,328 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:51:57,328 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 07:51:57,329 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-10-13 07:51:57,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 07:51:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-13 07:51:57,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2291666666666667) internal successors, (59), 50 states have internal predecessors, (59), 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 07:51:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 59 transitions. [2021-10-13 07:51:57,335 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 59 transitions. Word has length 19 [2021-10-13 07:51:57,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:51:57,335 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 59 transitions. [2021-10-13 07:51:57,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 3 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 07:51:57,335 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 59 transitions. [2021-10-13 07:51:57,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 07:51:57,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:51:57,337 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1] [2021-10-13 07:51:57,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (13)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:57,544 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (12)] Forceful destruction successful, exit code 0 [2021-10-13 07:51:57,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:51:57,738 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:51:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:51:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1922951525, now seen corresponding path program 2 times [2021-10-13 07:51:57,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:51:57,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [448734783] [2021-10-13 07:51:57,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:51:57,739 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:51:57,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:51:57,740 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:51:57,741 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Waiting until timeout for monitored process [2021-10-13 07:51:57,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:51:57,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:51:57,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:51:57,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:57,959 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:57,960 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:58,133 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:58,134 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:51:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [448734783] [2021-10-13 07:51:58,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [448734783] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:58,134 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [837324571] [2021-10-13 07:51:58,134 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:51:58,135 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:51:58,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:51:58,137 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:51:58,172 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Waiting until timeout for monitored process [2021-10-13 07:51:58,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:51:58,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:51:58,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 07:51:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:58,480 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:58,481 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:58,565 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:58,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [837324571] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:58,565 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36262294] [2021-10-13 07:51:58,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:51:58,566 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:51:58,566 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:51:58,567 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:51:58,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 07:51:58,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:51:58,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:51:58,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 07:51:58,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:51:58,804 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 07:51:58,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 07:51:59,027 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:59,028 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:51:59,508 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:51:59,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36262294] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:51:59,509 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:51:59,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7, 7, 8, 8] total 18 [2021-10-13 07:51:59,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646660008] [2021-10-13 07:51:59,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 07:51:59,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:51:59,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 07:51:59,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:51:59,511 INFO L87 Difference]: Start difference. First operand 51 states and 59 transitions. Second operand has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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 07:52:00,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:52:00,010 INFO L93 Difference]: Finished difference Result 57 states and 63 transitions. [2021-10-13 07:52:00,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 07:52:00,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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 21 [2021-10-13 07:52:00,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:52:00,013 INFO L225 Difference]: With dead ends: 57 [2021-10-13 07:52:00,013 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 07:52:00,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=169, Invalid=293, Unknown=0, NotChecked=0, Total=462 [2021-10-13 07:52:00,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 07:52:00,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2021-10-13 07:52:00,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 51 states have (on average 1.2352941176470589) internal successors, (63), 53 states have internal predecessors, (63), 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 07:52:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 63 transitions. [2021-10-13 07:52:00,020 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 63 transitions. Word has length 21 [2021-10-13 07:52:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:52:00,020 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 63 transitions. [2021-10-13 07:52:00,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.388888888888889) internal successors, (61), 18 states have internal predecessors, (61), 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 07:52:00,021 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 63 transitions. [2021-10-13 07:52:00,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 07:52:00,022 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:52:00,022 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1] [2021-10-13 07:52:00,053 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 07:52:00,250 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (15)] Ended with exit code 0 [2021-10-13 07:52:00,457 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (14)] Ended with exit code 0 [2021-10-13 07:52:00,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:52:00,649 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:52:00,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:52:00,649 INFO L82 PathProgramCache]: Analyzing trace with hash 1495096408, now seen corresponding path program 2 times [2021-10-13 07:52:00,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:52:00,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1742971586] [2021-10-13 07:52:00,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:52:00,650 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:52:00,650 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:52:00,651 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:52:00,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Waiting until timeout for monitored process [2021-10-13 07:52:00,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:52:00,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:52:00,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:52:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:52:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:00,962 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:52:01,060 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:01,060 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-13 07:52:01,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1742971586] [2021-10-13 07:52:01,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1742971586] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:52:01,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1186611562] [2021-10-13 07:52:01,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:52:01,061 INFO L170 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-10-13 07:52:01,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 [2021-10-13 07:52:01,065 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-10-13 07:52:01,088 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Waiting until timeout for monitored process [2021-10-13 07:52:01,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:52:01,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:52:01,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 07:52:01,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:52:01,463 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:01,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:52:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:01,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleCvc4 [1186611562] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:52:01,559 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644266631] [2021-10-13 07:52:01,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 07:52:01,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 07:52:01,559 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 [2021-10-13 07:52:01,561 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 07:52:01,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 07:52:01,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 07:52:01,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 07:52:01,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 07:52:01,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 07:52:01,855 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 07:52:02,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-10-13 07:52:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:02,240 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-13 07:52:02,922 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 17 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 07:52:02,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644266631] provided 0 perfect and 2 imperfect interpolant sequences [2021-10-13 07:52:02,922 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2021-10-13 07:52:02,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8, 8, 9, 9] total 18 [2021-10-13 07:52:02,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978452737] [2021-10-13 07:52:02,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 07:52:02,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-13 07:52:02,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 07:52:02,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:52:02,924 INFO L87 Difference]: Start difference. First operand 54 states and 63 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 07:52:03,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 07:52:03,298 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2021-10-13 07:52:03,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 07:52:03,298 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 28 [2021-10-13 07:52:03,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 07:52:03,299 INFO L225 Difference]: With dead ends: 51 [2021-10-13 07:52:03,299 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 07:52:03,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 453.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-10-13 07:52:03,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 07:52:03,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-13 07:52:03,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 50 states have internal predecessors, (58), 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 07:52:03,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 58 transitions. [2021-10-13 07:52:03,305 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 58 transitions. Word has length 28 [2021-10-13 07:52:03,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 07:52:03,305 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 58 transitions. [2021-10-13 07:52:03,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 18 states have internal predecessors, (66), 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 07:52:03,305 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 58 transitions. [2021-10-13 07:52:03,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 07:52:03,306 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 07:52:03,306 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 07:52:03,313 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt (18)] Forceful destruction successful, exit code 0 [2021-10-13 07:52:03,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 07:52:03,720 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (17)] Ended with exit code 0 [2021-10-13 07:52:03,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/cvc4 --incremental --print-success --lang smt,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:52:03,913 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE (and 3 more)] === [2021-10-13 07:52:03,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 07:52:03,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1418335515, now seen corresponding path program 1 times [2021-10-13 07:52:03,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-13 07:52:03,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1298731539] [2021-10-13 07:52:03,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 07:52:03,915 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-13 07:52:03,915 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat [2021-10-13 07:52:03,916 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-13 07:52:03,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Waiting until timeout for monitored process [2021-10-13 07:52:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:52:04,137 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-13 07:52:04,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-13 07:52:04,191 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-13 07:52:04,191 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-13 07:52:04,192 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-13 07:52:04,194 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-13 07:52:04,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:52:04,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:52:04,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE [2021-10-13 07:52:04,195 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK [2021-10-13 07:52:04,212 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 (20)] Forceful destruction successful, exit code 0 [2021-10-13 07:52:04,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/mathsat -unsat_core_generation=3 [2021-10-13 07:52:04,402 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 07:52:04,440 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 07:52:04 BoogieIcfgContainer [2021-10-13 07:52:04,440 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 07:52:04,441 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 07:52:04,441 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 07:52:04,441 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 07:52:04,442 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 07:51:48" (3/4) ... [2021-10-13 07:52:04,444 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-13 07:52:04,524 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/witness.graphml [2021-10-13 07:52:04,525 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 07:52:04,526 INFO L168 Benchmark]: Toolchain (without parser) took 16946.45 ms. Allocated memory was 77.6 MB in the beginning and 119.5 MB in the end (delta: 41.9 MB). Free memory was 42.0 MB in the beginning and 78.1 MB in the end (delta: -36.1 MB). Peak memory consumption was 7.8 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,528 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 77.6 MB. Free memory was 58.4 MB in the beginning and 58.3 MB in the end (delta: 60.5 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 07:52:04,528 INFO L168 Benchmark]: CACSL2BoogieTranslator took 246.87 ms. Allocated memory is still 77.6 MB. Free memory was 41.8 MB in the beginning and 53.3 MB in the end (delta: -11.5 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,533 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.59 ms. Allocated memory is still 77.6 MB. Free memory was 53.3 MB in the beginning and 60.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,534 INFO L168 Benchmark]: Boogie Preprocessor took 61.78 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 59.8 MB in the end (delta: 968.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,534 INFO L168 Benchmark]: RCFGBuilder took 438.22 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 50.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,535 INFO L168 Benchmark]: TraceAbstraction took 16063.38 ms. Allocated memory was 77.6 MB in the beginning and 119.5 MB in the end (delta: 41.9 MB). Free memory was 49.7 MB in the beginning and 80.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,535 INFO L168 Benchmark]: Witness Printer took 84.12 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 78.1 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 07:52:04,537 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 77.6 MB. Free memory was 58.4 MB in the beginning and 58.3 MB in the end (delta: 60.5 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 246.87 ms. Allocated memory is still 77.6 MB. Free memory was 41.8 MB in the beginning and 53.3 MB in the end (delta: -11.5 MB). Peak memory consumption was 6.0 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 44.59 ms. Allocated memory is still 77.6 MB. Free memory was 53.3 MB in the beginning and 60.7 MB in the end (delta: -7.4 MB). Peak memory consumption was 2.7 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 61.78 ms. Allocated memory is still 77.6 MB. Free memory was 60.7 MB in the beginning and 59.8 MB in the end (delta: 968.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 438.22 ms. Allocated memory is still 77.6 MB. Free memory was 59.8 MB in the beginning and 50.1 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 16063.38 ms. Allocated memory was 77.6 MB in the beginning and 119.5 MB in the end (delta: 41.9 MB). Free memory was 49.7 MB in the beginning and 80.2 MB in the end (delta: -30.5 MB). Peak memory consumption was 13.9 MB. Max. memory is 16.1 GB. * Witness Printer took 84.12 ms. Allocated memory is still 119.5 MB. Free memory was 80.2 MB in the beginning and 78.1 MB in the end (delta: 2.1 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 - CounterExampleResult [Line: 9]: pointer dereference may fail pointer dereference may fail We found a FailurePath: [L6] int* p = malloc(10 * sizeof(int)); [L8] int i = 0; [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND FALSE !(i == 5) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 [L10] COND TRUE i == 5 [L11] free(p) [L11] free(p) [L11] free(p) [L8] i++ [L8] COND TRUE i < 10 [L9] p[i] = 1 - UnprovableResult [Line: 9]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 11]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 5]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 6 error locations. Started 1 CEGAR loops. OverallTime: 15914.7ms, OverallIterations: 9, TraceHistogramMax: 7, EmptinessCheckTime: 21.7ms, AutomataDifference: 2442.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 76 SDtfs, 242 SDslu, 109 SDs, 0 SdLazy, 643 SolverSat, 54 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1276.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 555 GetRequests, 485 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 2305.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=54occurred in iteration=7, InterpolantAutomatonStates: 47, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 61.5ms AutomataMinimizationTime, 8 MinimizatonAttempts, 23 StatesRemovedByMinimization, 5 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 110.6ms SsaConstructionTime, 434.8ms SatisfiabilityAnalysisTime, 6332.2ms InterpolantComputationTime, 323 NumberOfCodeBlocks, 323 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 548 ConstructedInterpolants, 0 QuantifiedInterpolants, 3186 SizeOfPredicates, 12 NumberOfNonLiveVariables, 728 ConjunctsInSsa, 92 ConjunctsInUnsatCore, 36 InterpolantComputations, 8 PerfectInterpolantSequences, 186/822 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-13 07:52:04,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_031d0150-5c32-4020-8db7-345061c81787/bin/utaipan-q2qaUkNPG8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...