./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-properties/simple_built_from_end.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version b2eff8ba Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ...................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... 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_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-properties/simple_built_from_end.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG --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 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample --- Real Ultimate output --- This is Ultimate 0.2.1-dev-b2eff8b [2021-10-29 05:48:04,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:48:04,628 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:48:04,691 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:48:04,692 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:48:04,697 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:48:04,699 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:48:04,704 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:48:04,707 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:48:04,716 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:48:04,717 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:48:04,719 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:48:04,720 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:48:04,723 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:48:04,725 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:48:04,733 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:48:04,735 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:48:04,737 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:48:04,739 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:48:04,749 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:48:04,752 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:48:04,754 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:48:04,758 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:48:04,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:48:04,763 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:48:04,764 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:48:04,764 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:48:04,770 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:48:04,771 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:48:04,772 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:48:04,772 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:48:04,773 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:48:04,774 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:48:04,775 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:48:04,777 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:48:04,777 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:48:04,778 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:48:04,778 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:48:04,779 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:48:04,780 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:48:04,781 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:48:04,782 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2021-10-29 05:48:04,837 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:48:04,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:48:04,839 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:48:04,839 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:48:04,839 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:48:04,846 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:48:04,846 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-10-29 05:48:04,847 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:48:04,847 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:48:04,847 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-10-29 05:48:04,848 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-10-29 05:48:04,849 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:48:04,849 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-10-29 05:48:04,849 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-10-29 05:48:04,850 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-10-29 05:48:04,851 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:48:04,851 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:48:04,851 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:48:04,851 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:48:04,852 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:48:04,852 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:48:04,852 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:48:04,852 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:48:04,853 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:48:04,853 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:48:04,853 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:48:04,853 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:48:04,854 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:48:04,854 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:48:04,854 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:48:04,855 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:48:04,855 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:48:04,855 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:48:04,856 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:48:04,856 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:48:04,856 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-10-29 05:48:04,857 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-29 05:48:04,857 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:48:04,857 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:48:04,857 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_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-29 05:48:05,172 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:48:05,207 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:48:05,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:48:05,211 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:48:05,212 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:48:05,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-29 05:48:05,306 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/292def281/97c3a7e1b2494bf9b698320eb491bb09/FLAG3990e1c6e [2021-10-29 05:48:05,957 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:48:05,964 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-29 05:48:05,978 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/292def281/97c3a7e1b2494bf9b698320eb491bb09/FLAG3990e1c6e [2021-10-29 05:48:06,250 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/292def281/97c3a7e1b2494bf9b698320eb491bb09 [2021-10-29 05:48:06,254 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:48:06,255 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:48:06,258 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:48:06,258 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:48:06,261 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:48:06,262 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,263 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6e84d0c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06, skipping insertion in model container [2021-10-29 05:48:06,263 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,270 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:48:06,309 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:48:06,609 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-29 05:48:06,612 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:48:06,621 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:48:06,657 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-29 05:48:06,658 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:48:06,689 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:48:06,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06 WrapperNode [2021-10-29 05:48:06,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:48:06,691 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:48:06,691 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:48:06,691 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:48:06,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,712 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,731 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:48:06,732 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:48:06,732 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:48:06,732 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:48:06,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,744 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,744 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,751 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,755 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,756 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,759 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:48:06,760 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:48:06,760 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:48:06,760 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:48:06,761 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (1/1) ... [2021-10-29 05:48:06,768 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:48:06,780 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:48:06,791 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:48:06,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:48:06,842 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-29 05:48:06,843 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-29 05:48:06,844 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:48:06,845 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:48:06,845 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:48:06,846 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:48:06,846 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-29 05:48:06,846 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:48:06,846 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:48:07,211 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:48:07,211 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:48:07,213 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:07 BoogieIcfgContainer [2021-10-29 05:48:07,213 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:48:07,215 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:48:07,216 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:48:07,219 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:48:07,219 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:48:06" (1/3) ... [2021-10-29 05:48:07,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3542b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:48:07, skipping insertion in model container [2021-10-29 05:48:07,220 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:06" (2/3) ... [2021-10-29 05:48:07,220 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e3542b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:48:07, skipping insertion in model container [2021-10-29 05:48:07,221 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:07" (3/3) ... [2021-10-29 05:48:07,222 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-29 05:48:07,228 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:48:07,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-29 05:48:07,271 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:48:07,278 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:48:07,278 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-29 05:48:07,293 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 23 states have internal predecessors, (28), 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) [2021-10-29 05:48:07,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2021-10-29 05:48:07,299 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:07,299 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2021-10-29 05:48:07,300 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:07,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:07,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2799543, now seen corresponding path program 1 times [2021-10-29 05:48:07,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:07,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131114221] [2021-10-29 05:48:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:07,329 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:07,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:07,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:07,480 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:07,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131114221] [2021-10-29 05:48:07,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131114221] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:07,481 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:07,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:48:07,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079564546] [2021-10-29 05:48:07,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-29 05:48:07,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:07,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-29 05:48:07,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:48:07,507 INFO L87 Difference]: Start difference. First operand has 24 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 23 states have internal predecessors, (28), 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 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-29 05:48:07,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:07,526 INFO L93 Difference]: Finished difference Result 24 states and 26 transitions. [2021-10-29 05:48:07,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-29 05:48:07,529 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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 [2021-10-29 05:48:07,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:07,537 INFO L225 Difference]: With dead ends: 24 [2021-10-29 05:48:07,538 INFO L226 Difference]: Without dead ends: 22 [2021-10-29 05:48:07,540 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-29 05:48:07,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-29 05:48:07,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-29 05:48:07,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 12 states have (on average 1.9166666666666667) internal successors, (23), 21 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) [2021-10-29 05:48:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-29 05:48:07,575 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 4 [2021-10-29 05:48:07,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:07,576 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-29 05:48:07,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 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) [2021-10-29 05:48:07,576 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-29 05:48:07,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:07,577 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:07,577 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:07,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-29 05:48:07,578 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:07,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:07,582 INFO L85 PathProgramCache]: Analyzing trace with hash 86107672, now seen corresponding path program 1 times [2021-10-29 05:48:07,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:07,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589582284] [2021-10-29 05:48:07,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:07,584 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:07,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:07,678 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:07,678 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589582284] [2021-10-29 05:48:07,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589582284] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:07,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:07,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-10-29 05:48:07,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704045234] [2021-10-29 05:48:07,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:07,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:07,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:07,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,683 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:07,730 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-10-29 05:48:07,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:07,731 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:07,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:07,734 INFO L225 Difference]: With dead ends: 35 [2021-10-29 05:48:07,734 INFO L226 Difference]: Without dead ends: 34 [2021-10-29 05:48:07,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-29 05:48:07,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 28. [2021-10-29 05:48:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 18 states have (on average 1.9444444444444444) internal successors, (35), 27 states have internal predecessors, (35), 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) [2021-10-29 05:48:07,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 35 transitions. [2021-10-29 05:48:07,747 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 35 transitions. Word has length 5 [2021-10-29 05:48:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:07,748 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 35 transitions. [2021-10-29 05:48:07,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,749 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 35 transitions. [2021-10-29 05:48:07,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:07,750 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:07,751 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:07,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-29 05:48:07,756 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:07,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:07,757 INFO L85 PathProgramCache]: Analyzing trace with hash 86106786, now seen corresponding path program 1 times [2021-10-29 05:48:07,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:07,759 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504236632] [2021-10-29 05:48:07,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:07,760 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:07,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:07,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:07,850 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:07,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504236632] [2021-10-29 05:48:07,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504236632] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:07,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:07,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:48:07,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546604081] [2021-10-29 05:48:07,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:07,854 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:07,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,856 INFO L87 Difference]: Start difference. First operand 28 states and 35 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:07,883 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-10-29 05:48:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:07,884 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:07,885 INFO L225 Difference]: With dead ends: 32 [2021-10-29 05:48:07,885 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:48:07,885 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:48:07,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-10-29 05:48:07,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-29 05:48:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-29 05:48:07,889 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 5 [2021-10-29 05:48:07,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:07,890 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-29 05:48:07,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-29 05:48:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:07,891 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:07,891 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:07,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-29 05:48:07,891 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:07,892 INFO L85 PathProgramCache]: Analyzing trace with hash 86108101, now seen corresponding path program 1 times [2021-10-29 05:48:07,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:07,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516300189] [2021-10-29 05:48:07,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:07,893 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:07,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:07,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:07,934 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:07,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516300189] [2021-10-29 05:48:07,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516300189] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:07,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:07,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:48:07,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955250507] [2021-10-29 05:48:07,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:07,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:07,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:07,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,937 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:07,963 INFO L93 Difference]: Finished difference Result 22 states and 23 transitions. [2021-10-29 05:48:07,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:07,963 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:07,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:07,964 INFO L225 Difference]: With dead ends: 22 [2021-10-29 05:48:07,964 INFO L226 Difference]: Without dead ends: 22 [2021-10-29 05:48:07,965 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:07,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-29 05:48:07,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-29 05:48:07,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 21 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) [2021-10-29 05:48:07,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-29 05:48:07,968 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 5 [2021-10-29 05:48:07,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:07,968 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-29 05:48:07,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:07,969 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-29 05:48:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:07,969 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:07,969 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:07,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-29 05:48:07,970 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:07,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:07,970 INFO L85 PathProgramCache]: Analyzing trace with hash 86108102, now seen corresponding path program 1 times [2021-10-29 05:48:07,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:07,971 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863413153] [2021-10-29 05:48:07,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:07,971 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:08,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:08,062 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:08,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863413153] [2021-10-29 05:48:08,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863413153] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:08,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:08,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-29 05:48:08,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309161433] [2021-10-29 05:48:08,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:08,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:08,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:08,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:08,066 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:08,096 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-10-29 05:48:08,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:08,097 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:08,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:08,098 INFO L225 Difference]: With dead ends: 20 [2021-10-29 05:48:08,099 INFO L226 Difference]: Without dead ends: 20 [2021-10-29 05:48:08,099 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:08,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-29 05:48:08,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-29 05:48:08,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 14 states have (on average 1.5) internal successors, (21), 19 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) [2021-10-29 05:48:08,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-10-29 05:48:08,112 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2021-10-29 05:48:08,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:08,112 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-10-29 05:48:08,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,112 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-10-29 05:48:08,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:08,113 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:08,113 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-29 05:48:08,113 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:08,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:08,114 INFO L85 PathProgramCache]: Analyzing trace with hash -1997172937, now seen corresponding path program 1 times [2021-10-29 05:48:08,114 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:08,114 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232833463] [2021-10-29 05:48:08,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:08,115 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:08,215 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:08,215 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:08,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232833463] [2021-10-29 05:48:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232833463] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:08,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-29 05:48:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869729025] [2021-10-29 05:48:08,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:08,223 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:08,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:08,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:08,225 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:08,307 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-10-29 05:48:08,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:48:08,308 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:48:08,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:08,313 INFO L225 Difference]: With dead ends: 33 [2021-10-29 05:48:08,313 INFO L226 Difference]: Without dead ends: 33 [2021-10-29 05:48:08,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-29 05:48:08,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 21. [2021-10-29 05:48:08,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 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) [2021-10-29 05:48:08,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-29 05:48:08,317 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 10 [2021-10-29 05:48:08,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:08,317 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-29 05:48:08,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,317 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-29 05:48:08,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:08,318 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:08,318 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-29 05:48:08,318 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:08,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:08,319 INFO L85 PathProgramCache]: Analyzing trace with hash -1997173823, now seen corresponding path program 1 times [2021-10-29 05:48:08,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:08,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752889830] [2021-10-29 05:48:08,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:08,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:08,364 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:08,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752889830] [2021-10-29 05:48:08,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752889830] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:08,365 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:08,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:48:08,366 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807138214] [2021-10-29 05:48:08,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:08,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:08,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:08,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:08,367 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:08,412 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-10-29 05:48:08,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:48:08,412 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:48:08,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:08,413 INFO L225 Difference]: With dead ends: 25 [2021-10-29 05:48:08,413 INFO L226 Difference]: Without dead ends: 25 [2021-10-29 05:48:08,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:08,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-29 05:48:08,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 21. [2021-10-29 05:48:08,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.4375) internal successors, (23), 20 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) [2021-10-29 05:48:08,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2021-10-29 05:48:08,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 10 [2021-10-29 05:48:08,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:08,416 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2021-10-29 05:48:08,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,417 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2021-10-29 05:48:08,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:08,417 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:08,417 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-29 05:48:08,418 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:08,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:08,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1997173822, now seen corresponding path program 1 times [2021-10-29 05:48:08,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:08,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400501505] [2021-10-29 05:48:08,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:08,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:08,531 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:08,531 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:08,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400501505] [2021-10-29 05:48:08,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400501505] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:08,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:08,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-29 05:48:08,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452193949] [2021-10-29 05:48:08,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:08,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:08,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:08,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:08,534 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:08,597 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-29 05:48:08,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:48:08,598 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:48:08,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:08,599 INFO L225 Difference]: With dead ends: 28 [2021-10-29 05:48:08,599 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:48:08,600 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:08,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:48:08,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2021-10-29 05:48:08,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3888888888888888) internal successors, (25), 22 states have internal predecessors, (25), 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) [2021-10-29 05:48:08,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2021-10-29 05:48:08,606 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 10 [2021-10-29 05:48:08,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:08,606 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2021-10-29 05:48:08,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,607 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2021-10-29 05:48:08,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:48:08,607 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:08,607 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,608 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-10-29 05:48:08,608 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:08,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:08,608 INFO L85 PathProgramCache]: Analyzing trace with hash 566337826, now seen corresponding path program 1 times [2021-10-29 05:48:08,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:08,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878766916] [2021-10-29 05:48:08,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:08,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:08,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:08,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:08,727 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-10-29 05:48:08,727 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878766916] [2021-10-29 05:48:08,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878766916] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:08,728 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:08,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-29 05:48:08,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226699076] [2021-10-29 05:48:08,729 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:48:08,729 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-10-29 05:48:08,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:48:08,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:08,730 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:08,799 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-10-29 05:48:08,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:48:08,800 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-29 05:48:08,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:08,803 INFO L225 Difference]: With dead ends: 26 [2021-10-29 05:48:08,803 INFO L226 Difference]: Without dead ends: 26 [2021-10-29 05:48:08,808 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:48:08,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-29 05:48:08,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 23. [2021-10-29 05:48:08,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 22 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) [2021-10-29 05:48:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-29 05:48:08,815 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 12 [2021-10-29 05:48:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:08,816 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-29 05:48:08,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-10-29 05:48:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-29 05:48:08,818 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:08,818 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-10-29 05:48:08,818 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:08,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:08,820 INFO L85 PathProgramCache]: Analyzing trace with hash -1210029403, now seen corresponding path program 1 times [2021-10-29 05:48:08,820 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-10-29 05:48:08,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672832252] [2021-10-29 05:48:08,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:08,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-29 05:48:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:48:08,856 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:48:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:48:08,916 INFO L133 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2021-10-29 05:48:08,916 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:48:08,917 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:48:08,921 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:48:08,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:48:08,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:48:08,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:48:08,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:48:08,922 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:48:08,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:48:08,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:48:08,923 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-29 05:48:08,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-29 05:48:08,926 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:08,929 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:48:08,950 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:48:08 BoogieIcfgContainer [2021-10-29 05:48:08,950 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:48:08,951 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:48:08,951 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:48:08,951 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:48:08,952 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:07" (3/4) ... [2021-10-29 05:48:08,955 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:48:08,955 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:48:08,957 INFO L168 Benchmark]: Toolchain (without parser) took 2700.46 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 52.2 MB in the beginning and 56.6 MB in the end (delta: -4.4 MB). Peak memory consumption was 17.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,957 INFO L168 Benchmark]: CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:48:08,958 INFO L168 Benchmark]: CACSL2BoogieTranslator took 432.01 ms. Allocated memory is still 88.1 MB. Free memory was 52.0 MB in the beginning and 57.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,959 INFO L168 Benchmark]: Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 55.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,959 INFO L168 Benchmark]: Boogie Preprocessor took 27.13 ms. Allocated memory is still 88.1 MB. Free memory was 55.2 MB in the beginning and 54.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,960 INFO L168 Benchmark]: RCFGBuilder took 453.82 ms. Allocated memory is still 88.1 MB. Free memory was 54.0 MB in the beginning and 41.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,960 INFO L168 Benchmark]: TraceAbstraction took 1735.04 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 41.0 MB in the beginning and 57.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:08,961 INFO L168 Benchmark]: Witness Printer took 4.36 ms. Allocated memory is still 111.1 MB. Free memory is still 56.6 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:48:08,964 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.26 ms. Allocated memory is still 88.1 MB. Free memory was 59.8 MB in the beginning and 59.8 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 432.01 ms. Allocated memory is still 88.1 MB. Free memory was 52.0 MB in the beginning and 57.1 MB in the end (delta: -5.2 MB). Peak memory consumption was 6.3 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 40.55 ms. Allocated memory is still 88.1 MB. Free memory was 57.1 MB in the beginning and 55.2 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 27.13 ms. Allocated memory is still 88.1 MB. Free memory was 55.2 MB in the beginning and 54.0 MB in the end (delta: 1.2 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 453.82 ms. Allocated memory is still 88.1 MB. Free memory was 54.0 MB in the beginning and 41.8 MB in the end (delta: 12.2 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * TraceAbstraction took 1735.04 ms. Allocated memory was 88.1 MB in the beginning and 111.1 MB in the end (delta: 23.1 MB). Free memory was 41.0 MB in the beginning and 57.4 MB in the end (delta: -16.4 MB). Peak memory consumption was 9.4 MB. Max. memory is 16.1 GB. * Witness Printer took 4.36 ms. Allocated memory is still 111.1 MB. Free memory is still 56.6 MB. There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 24 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 1.6s, OverallIterations: 10, TraceHistogramMax: 2, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 138 SDtfs, 156 SDslu, 63 SDs, 0 SdLazy, 149 SolverSat, 17 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 33 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=2, InterpolantAutomatonStates: 32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 9 MinimizatonAttempts, 37 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 80 NumberOfCodeBlocks, 80 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 57 ConstructedInterpolants, 0 QuantifiedInterpolants, 233 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:48:09,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/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-b2eff8b [2021-10-29 05:48:11,615 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-29 05:48:11,619 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-29 05:48:11,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-29 05:48:11,678 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-29 05:48:11,682 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-29 05:48:11,684 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-29 05:48:11,688 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-29 05:48:11,692 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-29 05:48:11,699 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-29 05:48:11,701 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-29 05:48:11,703 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-29 05:48:11,704 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-29 05:48:11,706 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-29 05:48:11,709 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-29 05:48:11,711 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-29 05:48:11,713 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-29 05:48:11,717 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-29 05:48:11,719 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-29 05:48:11,729 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-29 05:48:11,731 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-29 05:48:11,732 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-29 05:48:11,735 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-29 05:48:11,737 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-29 05:48:11,746 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-29 05:48:11,747 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-29 05:48:11,747 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-29 05:48:11,749 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-29 05:48:11,750 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-29 05:48:11,751 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-29 05:48:11,751 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-29 05:48:11,752 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-29 05:48:11,754 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-29 05:48:11,755 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-29 05:48:11,757 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-29 05:48:11,757 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-29 05:48:11,758 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-29 05:48:11,759 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-29 05:48:11,759 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-29 05:48:11,761 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-29 05:48:11,761 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-29 05:48:11,762 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Bitvector.epf [2021-10-29 05:48:11,808 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-29 05:48:11,809 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-29 05:48:11,810 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-10-29 05:48:11,810 INFO L138 SettingsManager]: * User list type=DISABLED [2021-10-29 05:48:11,811 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-10-29 05:48:11,811 INFO L138 SettingsManager]: * Explicit value domain=true [2021-10-29 05:48:11,811 INFO L138 SettingsManager]: * Octagon Domain=false [2021-10-29 05:48:11,811 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-10-29 05:48:11,811 INFO L138 SettingsManager]: * Interval Domain=false [2021-10-29 05:48:11,813 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-29 05:48:11,814 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-29 05:48:11,814 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-29 05:48:11,814 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-29 05:48:11,815 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2021-10-29 05:48:11,815 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-29 05:48:11,815 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-29 05:48:11,815 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-29 05:48:11,816 INFO L138 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2021-10-29 05:48:11,816 INFO L138 SettingsManager]: * Bitprecise bitfields=true [2021-10-29 05:48:11,816 INFO L138 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2021-10-29 05:48:11,817 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-29 05:48:11,817 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-10-29 05:48:11,817 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-10-29 05:48:11,817 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-10-29 05:48:11,817 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-29 05:48:11,818 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-29 05:48:11,818 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-29 05:48:11,818 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-29 05:48:11,818 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-29 05:48:11,819 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:48:11,819 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-29 05:48:11,819 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-29 05:48:11,820 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-10-29 05:48:11,820 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-10-29 05:48:11,820 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-29 05:48:11,820 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-10-29 05:48:11,821 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_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0eb3d3e07cae1efa9dc9af5091aea6a309746434756c62bcf3ece83b84aec27a [2021-10-29 05:48:12,223 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-29 05:48:12,257 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-29 05:48:12,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-29 05:48:12,261 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-29 05:48:12,261 INFO L275 PluginConnector]: CDTParser initialized [2021-10-29 05:48:12,262 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/../../sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-29 05:48:12,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/1c6bfaf46/d1afc747ab6f49198059601ce53317c9/FLAG38f306c91 [2021-10-29 05:48:12,806 INFO L306 CDTParser]: Found 1 translation units. [2021-10-29 05:48:12,806 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i [2021-10-29 05:48:12,819 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/1c6bfaf46/d1afc747ab6f49198059601ce53317c9/FLAG38f306c91 [2021-10-29 05:48:13,156 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/data/1c6bfaf46/d1afc747ab6f49198059601ce53317c9 [2021-10-29 05:48:13,160 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-29 05:48:13,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-29 05:48:13,166 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-29 05:48:13,166 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-29 05:48:13,171 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-29 05:48:13,171 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1fe08118 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13, skipping insertion in model container [2021-10-29 05:48:13,173 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,181 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-29 05:48:13,238 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-29 05:48:13,642 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-29 05:48:13,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:48:13,669 INFO L203 MainTranslator]: Completed pre-run [2021-10-29 05:48:13,727 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/sv-benchmarks/c/list-properties/simple_built_from_end.i[23125,23138] [2021-10-29 05:48:13,735 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-29 05:48:13,776 INFO L208 MainTranslator]: Completed translation [2021-10-29 05:48:13,777 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13 WrapperNode [2021-10-29 05:48:13,778 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-29 05:48:13,779 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-29 05:48:13,779 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-29 05:48:13,779 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-29 05:48:13,787 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,817 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,837 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-29 05:48:13,838 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-29 05:48:13,838 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-29 05:48:13,838 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-29 05:48:13,847 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,847 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,851 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,851 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,863 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,865 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,869 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-29 05:48:13,869 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-29 05:48:13,870 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-29 05:48:13,870 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-29 05:48:13,871 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (1/1) ... [2021-10-29 05:48:13,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-29 05:48:13,890 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 [2021-10-29 05:48:13,904 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-29 05:48:13,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-29 05:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-10-29 05:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-10-29 05:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-10-29 05:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-29 05:48:13,956 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-10-29 05:48:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-10-29 05:48:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-10-29 05:48:13,957 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-29 05:48:13,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-29 05:48:14,311 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-29 05:48:14,312 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-10-29 05:48:14,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:14 BoogieIcfgContainer [2021-10-29 05:48:14,314 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-29 05:48:14,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-29 05:48:14,330 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-29 05:48:14,333 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-29 05:48:14,333 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 05:48:13" (1/3) ... [2021-10-29 05:48:14,334 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf668b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:48:14, skipping insertion in model container [2021-10-29 05:48:14,334 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 05:48:13" (2/3) ... [2021-10-29 05:48:14,335 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5eaf668b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 05:48:14, skipping insertion in model container [2021-10-29 05:48:14,335 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:14" (3/3) ... [2021-10-29 05:48:14,336 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_built_from_end.i [2021-10-29 05:48:14,342 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-29 05:48:14,342 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2021-10-29 05:48:14,410 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-29 05:48:14,416 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=false, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-29 05:48:14,416 INFO L340 AbstractCegarLoop]: Starting to check reachability of 10 error locations. [2021-10-29 05:48:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 16 states have (on average 2.0) internal successors, (32), 26 states have internal predecessors, (32), 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) [2021-10-29 05:48:14,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:14,450 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:14,451 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:14,452 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:14,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:14,457 INFO L85 PathProgramCache]: Analyzing trace with hash 28698492, now seen corresponding path program 1 times [2021-10-29 05:48:14,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:14,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1139075507] [2021-10-29 05:48:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:14,471 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:14,471 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:14,474 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:14,479 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-10-29 05:48:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:14,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 25 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:48:14,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:14,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:14,643 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:14,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:14,668 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:14,668 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1139075507] [2021-10-29 05:48:14,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1139075507] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:14,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:14,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:48:14,671 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920721624] [2021-10-29 05:48:14,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:14,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:14,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:14,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:14,700 INFO L87 Difference]: Start difference. First operand has 27 states, 16 states have (on average 2.0) internal successors, (32), 26 states have internal predecessors, (32), 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 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:14,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:14,820 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2021-10-29 05:48:14,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:14,822 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:14,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:14,830 INFO L225 Difference]: With dead ends: 40 [2021-10-29 05:48:14,830 INFO L226 Difference]: Without dead ends: 36 [2021-10-29 05:48:14,832 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:14,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-29 05:48:14,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 30. [2021-10-29 05:48:14,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 20 states have (on average 1.85) internal successors, (37), 29 states have internal predecessors, (37), 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) [2021-10-29 05:48:14,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2021-10-29 05:48:14,863 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 5 [2021-10-29 05:48:14,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:14,864 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2021-10-29 05:48:14,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:14,865 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2021-10-29 05:48:14,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:14,865 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:14,865 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:14,885 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:15,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,081 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:15,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:15,082 INFO L85 PathProgramCache]: Analyzing trace with hash 28698536, now seen corresponding path program 1 times [2021-10-29 05:48:15,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:15,083 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [764869566] [2021-10-29 05:48:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:15,083 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:15,084 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:15,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-10-29 05:48:15,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 24 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:48:15,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:15,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:15,234 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:15,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:15,265 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:15,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [764869566] [2021-10-29 05:48:15,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [764869566] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:15,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:15,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-29 05:48:15,266 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307196278] [2021-10-29 05:48:15,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:15,268 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:15,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:15,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:15,269 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:15,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:15,320 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2021-10-29 05:48:15,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:15,321 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:15,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:15,321 INFO L225 Difference]: With dead ends: 34 [2021-10-29 05:48:15,322 INFO L226 Difference]: Without dead ends: 33 [2021-10-29 05:48:15,322 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:15,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-29 05:48:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 25. [2021-10-29 05:48:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 24 states have internal predecessors, (26), 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) [2021-10-29 05:48:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-10-29 05:48:15,326 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 5 [2021-10-29 05:48:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:15,327 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-10-29 05:48:15,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-10-29 05:48:15,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:15,328 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:15,328 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:15,346 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:15,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,543 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:15,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:15,543 INFO L85 PathProgramCache]: Analyzing trace with hash 28699851, now seen corresponding path program 1 times [2021-10-29 05:48:15,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:15,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [591614078] [2021-10-29 05:48:15,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:15,544 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:15,545 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:15,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-10-29 05:48:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:15,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 2 conjunts are in the unsatisfiable core [2021-10-29 05:48:15,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:15,647 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 [2021-10-29 05:48:15,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:15,660 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:15,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:15,679 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:15,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [591614078] [2021-10-29 05:48:15,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [591614078] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:15,680 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:15,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-10-29 05:48:15,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594051312] [2021-10-29 05:48:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-29 05:48:15,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:15,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-29 05:48:15,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:15,683 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:15,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:15,738 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-10-29 05:48:15,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:15,739 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2021-10-29 05:48:15,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:15,739 INFO L225 Difference]: With dead ends: 23 [2021-10-29 05:48:15,740 INFO L226 Difference]: Without dead ends: 23 [2021-10-29 05:48:15,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-29 05:48:15,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-29 05:48:15,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-29 05:48:15,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.6) internal successors, (24), 22 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) [2021-10-29 05:48:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-10-29 05:48:15,744 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 5 [2021-10-29 05:48:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:15,744 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-10-29 05:48:15,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-10-29 05:48:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-10-29 05:48:15,745 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:15,746 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-10-29 05:48:15,757 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:15,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,957 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:15,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:15,957 INFO L85 PathProgramCache]: Analyzing trace with hash 28699852, now seen corresponding path program 1 times [2021-10-29 05:48:15,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:15,958 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1038217019] [2021-10-29 05:48:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:15,958 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:15,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:15,962 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:15,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-10-29 05:48:16,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:16,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 30 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:48:16,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:16,065 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 [2021-10-29 05:48:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:16,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:16,202 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:16,202 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1038217019] [2021-10-29 05:48:16,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1038217019] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:16,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:16,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 3 [2021-10-29 05:48:16,203 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068302248] [2021-10-29 05:48:16,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:16,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:16,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:16,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:16,206 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-29 05:48:16,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:16,281 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-10-29 05:48:16,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-29 05:48:16,283 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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 5 [2021-10-29 05:48:16,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:16,283 INFO L225 Difference]: With dead ends: 21 [2021-10-29 05:48:16,284 INFO L226 Difference]: Without dead ends: 21 [2021-10-29 05:48:16,284 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:16,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-29 05:48:16,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-29 05:48:16,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 20 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) [2021-10-29 05:48:16,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-10-29 05:48:16,287 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 5 [2021-10-29 05:48:16,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:16,287 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-10-29 05:48:16,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 4 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) [2021-10-29 05:48:16,288 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-10-29 05:48:16,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:16,288 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:16,288 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:16,309 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:16,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:16,500 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:16,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:16,501 INFO L85 PathProgramCache]: Analyzing trace with hash -653129230, now seen corresponding path program 1 times [2021-10-29 05:48:16,501 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:16,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1853528326] [2021-10-29 05:48:16,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:16,502 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:16,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:16,503 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:16,505 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-10-29 05:48:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:16,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:48:16,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:16,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:16,628 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:16,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:16,663 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:16,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1853528326] [2021-10-29 05:48:16,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1853528326] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:16,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:16,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-10-29 05:48:16,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002469056] [2021-10-29 05:48:16,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:16,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:16,667 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:16,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:16,772 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2021-10-29 05:48:16,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:48:16,773 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:48:16,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:16,774 INFO L225 Difference]: With dead ends: 36 [2021-10-29 05:48:16,774 INFO L226 Difference]: Without dead ends: 36 [2021-10-29 05:48:16,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:16,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-29 05:48:16,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 22. [2021-10-29 05:48:16,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 16 states have (on average 1.4375) internal successors, (23), 21 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) [2021-10-29 05:48:16,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-10-29 05:48:16,779 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 10 [2021-10-29 05:48:16,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:16,779 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-10-29 05:48:16,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:16,779 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-10-29 05:48:16,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:16,780 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:16,780 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:16,805 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:16,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:16,989 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:16,990 INFO L85 PathProgramCache]: Analyzing trace with hash -653129186, now seen corresponding path program 1 times [2021-10-29 05:48:16,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:16,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1827722792] [2021-10-29 05:48:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:16,991 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:16,991 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:16,991 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:17,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-10-29 05:48:17,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:17,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-29 05:48:17,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:17,087 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 [2021-10-29 05:48:17,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:17,136 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:17,201 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:17,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1827722792] [2021-10-29 05:48:17,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1827722792] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:17,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:17,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 3 [2021-10-29 05:48:17,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358139693] [2021-10-29 05:48:17,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-29 05:48:17,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:17,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-29 05:48:17,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-10-29 05:48:17,204 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:17,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:17,324 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-10-29 05:48:17,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-29 05:48:17,325 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-10-29 05:48:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:17,325 INFO L225 Difference]: With dead ends: 27 [2021-10-29 05:48:17,325 INFO L226 Difference]: Without dead ends: 27 [2021-10-29 05:48:17,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:17,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-29 05:48:17,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 22. [2021-10-29 05:48:17,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.411764705882353) internal successors, (24), 21 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) [2021-10-29 05:48:17,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-10-29 05:48:17,328 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 10 [2021-10-29 05:48:17,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:17,328 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-10-29 05:48:17,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:17,328 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-10-29 05:48:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-29 05:48:17,329 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:17,329 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:17,344 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (7)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:17,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:17,530 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATION === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:17,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -653129185, now seen corresponding path program 1 times [2021-10-29 05:48:17,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:17,531 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [743540106] [2021-10-29 05:48:17,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:17,531 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:17,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:17,533 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:17,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Waiting until timeout for monitored process [2021-10-29 05:48:17,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:17,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-29 05:48:17,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:17,641 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 [2021-10-29 05:48:17,743 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:17,744 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:17,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:17,947 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:17,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [743540106] [2021-10-29 05:48:17,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [743540106] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:17,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:17,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [] total 5 [2021-10-29 05:48:17,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393152391] [2021-10-29 05:48:17,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-29 05:48:17,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:17,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-29 05:48:17,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-10-29 05:48:17,949 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-29 05:48:18,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:18,133 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-10-29 05:48:18,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-29 05:48:18,134 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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 10 [2021-10-29 05:48:18,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:18,135 INFO L225 Difference]: With dead ends: 31 [2021-10-29 05:48:18,135 INFO L226 Difference]: Without dead ends: 31 [2021-10-29 05:48:18,135 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-10-29 05:48:18,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-29 05:48:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2021-10-29 05:48:18,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 23 states have internal predecessors, (26), 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) [2021-10-29 05:48:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-10-29 05:48:18,138 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 10 [2021-10-29 05:48:18,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:18,139 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-10-29 05:48:18,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 6 states have internal predecessors, (18), 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) [2021-10-29 05:48:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-10-29 05:48:18,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-29 05:48:18,139 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:18,140 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:18,157 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (8)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:18,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:18,340 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:18,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:18,341 INFO L85 PathProgramCache]: Analyzing trace with hash -591922145, now seen corresponding path program 1 times [2021-10-29 05:48:18,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:18,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2142470892] [2021-10-29 05:48:18,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:18,342 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:18,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:18,352 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:18,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Waiting until timeout for monitored process [2021-10-29 05:48:18,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-29 05:48:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-29 05:48:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-29 05:48:18,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-10-29 05:48:18,531 INFO L354 Elim1Store]: treesize reduction 27, result has 20.6 percent of original size [2021-10-29 05:48:18,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 11 [2021-10-29 05:48:18,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-10-29 05:48:18,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:18,588 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-10-29 05:48:18,633 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-10-29 05:48:18,636 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-10-29 05:48:18,657 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-29 05:48:18,657 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-10-29 05:48:18,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2142470892] [2021-10-29 05:48:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [2142470892] provided 2 perfect and 0 imperfect interpolant sequences [2021-10-29 05:48:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-10-29 05:48:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-10-29 05:48:18,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611684185] [2021-10-29 05:48:18,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-29 05:48:18,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-10-29 05:48:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-29 05:48:18,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-10-29 05:48:18,662 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:18,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-29 05:48:18,823 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2021-10-29 05:48:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-29 05:48:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-10-29 05:48:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-29 05:48:18,825 INFO L225 Difference]: With dead ends: 28 [2021-10-29 05:48:18,825 INFO L226 Difference]: Without dead ends: 28 [2021-10-29 05:48:18,825 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-10-29 05:48:18,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-29 05:48:18,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2021-10-29 05:48:18,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 23 states have internal predecessors, (25), 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) [2021-10-29 05:48:18,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-10-29 05:48:18,828 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 12 [2021-10-29 05:48:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-29 05:48:18,828 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-10-29 05:48:18,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-29 05:48:18,829 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-10-29 05:48:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-29 05:48:18,829 INFO L505 BasicCegarLoop]: Found error trace [2021-10-29 05:48:18,829 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:18,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (9)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:19,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:19,030 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATION, ULTIMATE.startErr1REQUIRES_VIOLATION, ULTIMATE.startErr2REQUIRES_VIOLATION, ULTIMATE.startErr3REQUIRES_VIOLATION (and 6 more)] === [2021-10-29 05:48:19,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-29 05:48:19,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1187913323, now seen corresponding path program 1 times [2021-10-29 05:48:19,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-10-29 05:48:19,031 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1393769552] [2021-10-29 05:48:19,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-29 05:48:19,031 INFO L170 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-10-29 05:48:19,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat [2021-10-29 05:48:19,032 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-10-29 05:48:19,033 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Waiting until timeout for monitored process [2021-10-29 05:48:19,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:48:19,132 INFO L355 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-29 05:48:19,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-29 05:48:19,197 INFO L133 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2021-10-29 05:48:19,198 INFO L627 BasicCegarLoop]: Counterexample is feasible [2021-10-29 05:48:19,199 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr9ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:48:19,201 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATION [2021-10-29 05:48:19,201 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATION [2021-10-29 05:48:19,201 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATION [2021-10-29 05:48:19,202 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATION [2021-10-29 05:48:19,202 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATION [2021-10-29 05:48:19,202 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5REQUIRES_VIOLATION [2021-10-29 05:48:19,202 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK [2021-10-29 05:48:19,202 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7REQUIRES_VIOLATION [2021-10-29 05:48:19,203 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr8REQUIRES_VIOLATION [2021-10-29 05:48:19,246 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 (10)] Forceful destruction successful, exit code 0 [2021-10-29 05:48:19,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/mathsat -unsat_core_generation=3 [2021-10-29 05:48:19,406 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-29 05:48:19,409 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-29 05:48:19,439 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.10 05:48:19 BoogieIcfgContainer [2021-10-29 05:48:19,439 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-29 05:48:19,440 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-29 05:48:19,440 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-29 05:48:19,440 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-29 05:48:19,440 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 05:48:14" (3/4) ... [2021-10-29 05:48:19,444 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-10-29 05:48:19,445 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-29 05:48:19,454 INFO L168 Benchmark]: Toolchain (without parser) took 6282.94 ms. Allocated memory was 56.6 MB in the beginning and 83.9 MB in the end (delta: 27.3 MB). Free memory was 33.7 MB in the beginning and 52.4 MB in the end (delta: -18.7 MB). Peak memory consumption was 8.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:19,454 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:48:19,455 INFO L168 Benchmark]: CACSL2BoogieTranslator took 611.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.4 MB in the beginning and 45.1 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:19,456 INFO L168 Benchmark]: Boogie Procedure Inliner took 58.55 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 43.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:48:19,458 INFO L168 Benchmark]: Boogie Preprocessor took 30.50 ms. Allocated memory is still 69.2 MB. Free memory was 43.1 MB in the beginning and 41.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:19,458 INFO L168 Benchmark]: RCFGBuilder took 444.57 ms. Allocated memory is still 69.2 MB. Free memory was 41.6 MB in the beginning and 47.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:19,462 INFO L168 Benchmark]: TraceAbstraction took 5123.62 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 46.8 MB in the beginning and 52.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. [2021-10-29 05:48:19,462 INFO L168 Benchmark]: Witness Printer took 5.16 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 52.4 MB in the end (delta: 271.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-29 05:48:19,466 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 56.6 MB. Free memory was 38.0 MB in the beginning and 38.0 MB in the end (delta: 44.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 611.98 ms. Allocated memory was 56.6 MB in the beginning and 69.2 MB in the end (delta: 12.6 MB). Free memory was 33.4 MB in the beginning and 45.1 MB in the end (delta: -11.7 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 58.55 ms. Allocated memory is still 69.2 MB. Free memory was 44.9 MB in the beginning and 43.1 MB in the end (delta: 1.8 MB). There was no memory consumed. Max. memory is 16.1 GB. * Boogie Preprocessor took 30.50 ms. Allocated memory is still 69.2 MB. Free memory was 43.1 MB in the beginning and 41.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 4.2 MB. Max. memory is 16.1 GB. * RCFGBuilder took 444.57 ms. Allocated memory is still 69.2 MB. Free memory was 41.6 MB in the beginning and 47.3 MB in the end (delta: -5.7 MB). Peak memory consumption was 12.3 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5123.62 ms. Allocated memory was 69.2 MB in the beginning and 83.9 MB in the end (delta: 14.7 MB). Free memory was 46.8 MB in the beginning and 52.7 MB in the end (delta: -5.9 MB). Peak memory consumption was 7.5 MB. Max. memory is 16.1 GB. * Witness Printer took 5.16 ms. Allocated memory is still 83.9 MB. Free memory was 52.7 MB in the beginning and 52.4 MB in the end (delta: 271.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 531]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 531. Possible FailurePath: [L532] List t; [L533] List p = 0; [L534] COND TRUE __VERIFIER_nondet_int() [L535] t = (List) malloc(sizeof(struct node)) [L536] COND FALSE !(t == 0) [L537] t->h = 1 [L538] t->n = p [L539] p = t [L534] COND FALSE !(__VERIFIER_nondet_int()) [L541] COND TRUE p!=0 [L542] EXPR p->h [L542] COND FALSE !(p->h != 1) [L545] EXPR p->n [L545] p = p->n [L541] COND FALSE !(p!=0) - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 537]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 538]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 542]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 543]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 545]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 27 locations, 10 error locations. Started 1 CEGAR loops. OverallTime: 4.9s, OverallIterations: 9, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 119 SDtfs, 210 SDslu, 58 SDs, 0 SdLazy, 181 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 114 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=30occurred in iteration=1, InterpolantAutomatonStates: 31, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 44 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.1s InterpolantComputationTime, 77 NumberOfCodeBlocks, 77 NumberOfCodeBlocksAsserted, 9 NumberOfCheckSat, 108 ConstructedInterpolants, 0 QuantifiedInterpolants, 550 SizeOfPredicates, 9 NumberOfNonLiveVariables, 308 ConjunctsInSsa, 27 ConjunctsInUnsatCore, 16 InterpolantComputations, 16 PerfectInterpolantSequences, 8/8 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2021-10-29 05:48:19,513 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c7ab1bc9-cb7a-48b8-8b01-624614f7e0c3/bin/utaipan-SDwSMHVbGG/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...