./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:10:15,929 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:10:15,931 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:10:15,972 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:10:15,973 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:10:15,974 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:10:15,976 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:10:15,978 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:10:15,981 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:10:15,982 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:10:15,983 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:10:15,985 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:10:15,985 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:10:15,987 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:10:15,988 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:10:15,990 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:10:15,991 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:10:15,992 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:10:15,995 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:10:15,997 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:10:16,000 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:10:16,001 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:10:16,003 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:10:16,004 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:10:16,008 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:10:16,009 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:10:16,010 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:10:16,011 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:10:16,011 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:10:16,013 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:10:16,013 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:10:16,014 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:10:16,015 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:10:16,016 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:10:16,017 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:10:16,018 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:10:16,019 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:10:16,019 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:10:16,019 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:10:16,021 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:10:16,021 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:10:16,023 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-03 04:10:16,048 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:10:16,049 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:10:16,049 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:10:16,050 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:10:16,050 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:10:16,051 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:10:16,051 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-03 04:10:16,051 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:10:16,054 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:10:16,054 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-03 04:10:16,055 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-03 04:10:16,055 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:10:16,056 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-03 04:10:16,060 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-03 04:10:16,060 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2021-11-03 04:10:16,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:10:16,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:10:16,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-03 04:10:16,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:10:16,063 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:10:16,063 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:10:16,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:10:16,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:10:16,064 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:10:16,064 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:10:16,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:10:16,064 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:10:16,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:10:16,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:10:16,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:10:16,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:16,068 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:10:16,068 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:10:16,068 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:10:16,068 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-03 04:10:16,069 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-03 04:10:16,069 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:10:16,069 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:10:16,070 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:10:16,070 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 [2021-11-03 04:10:16,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:10:16,323 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:10:16,325 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:10:16,326 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:10:16,326 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:10:16,327 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-11-03 04:10:16,420 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/78db3d899/f07dafe9fb4c453182059a6579858e49/FLAG0beb929f2 [2021-11-03 04:10:16,868 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:10:16,872 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-11-03 04:10:16,894 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/78db3d899/f07dafe9fb4c453182059a6579858e49/FLAG0beb929f2 [2021-11-03 04:10:17,226 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/78db3d899/f07dafe9fb4c453182059a6579858e49 [2021-11-03 04:10:17,228 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:10:17,229 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:10:17,234 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:17,235 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:10:17,238 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:10:17,239 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,240 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1610df69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17, skipping insertion in model container [2021-11-03 04:10:17,241 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,248 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:10:17,299 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:10:17,632 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-11-03 04:10:17,636 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-11-03 04:10:17,638 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-11-03 04:10:17,642 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:17,650 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:10:17,683 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-11-03 04:10:17,684 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-11-03 04:10:17,686 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-11-03 04:10:17,690 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:17,727 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:10:17,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17 WrapperNode [2021-11-03 04:10:17,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:17,729 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:17,729 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:10:17,729 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:10:17,737 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,751 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,789 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:17,792 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:10:17,792 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:10:17,792 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:10:17,800 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,801 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,806 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,806 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,814 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,818 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,821 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,824 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:10:17,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:10:17,841 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:10:17,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:10:17,842 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (1/1) ... [2021-11-03 04:10:17,849 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:17,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:17,885 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:10:17,917 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:10:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-03 04:10:17,938 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-03 04:10:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:10:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:10:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:10:17,939 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:10:17,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:10:17,940 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-03 04:10:17,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:10:17,940 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:10:18,560 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:10:18,560 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-03 04:10:18,563 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:18 BoogieIcfgContainer [2021-11-03 04:10:18,563 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:10:18,565 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:10:18,565 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:10:18,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:10:18,569 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:17" (1/3) ... [2021-11-03 04:10:18,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b2f568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:18, skipping insertion in model container [2021-11-03 04:10:18,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:17" (2/3) ... [2021-11-03 04:10:18,571 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24b2f568 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:18, skipping insertion in model container [2021-11-03 04:10:18,571 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:18" (3/3) ... [2021-11-03 04:10:18,572 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2021-11-03 04:10:18,577 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:10:18,578 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 04:10:18,652 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:10:18,662 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:10:18,663 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:10:18,680 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:18,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2021-11-03 04:10:18,705 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:18,706 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2021-11-03 04:10:18,707 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:18,714 INFO L85 PathProgramCache]: Analyzing trace with hash 137298967, now seen corresponding path program 1 times [2021-11-03 04:10:18,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:18,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893481285] [2021-11-03 04:10:18,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:18,725 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:18,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:18,891 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:18,892 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893481285] [2021-11-03 04:10:18,893 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893481285] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:18,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:18,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-03 04:10:18,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664645334] [2021-11-03 04:10:18,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:10:18,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:18,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:10:18,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:10:18,933 INFO L87 Difference]: Start difference. First operand has 22 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 21 states have internal predecessors, (34), 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 2.5) 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) [2021-11-03 04:10:18,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:18,946 INFO L93 Difference]: Finished difference Result 41 states and 63 transitions. [2021-11-03 04:10:18,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:10:18,947 INFO L78 Accepts]: Start accepts. Automaton has has 2 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 [2021-11-03 04:10:18,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:18,956 INFO L225 Difference]: With dead ends: 41 [2021-11-03 04:10:18,956 INFO L226 Difference]: Without dead ends: 20 [2021-11-03 04:10:18,959 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 [2021-11-03 04:10:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-03 04:10:18,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-11-03 04:10:18,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2352941176470589) 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) [2021-11-03 04:10:18,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-11-03 04:10:18,992 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 5 [2021-11-03 04:10:18,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:18,993 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-11-03 04:10:18,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 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) [2021-11-03 04:10:18,993 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-11-03 04:10:18,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:10:18,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:18,994 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:10:18,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-03 04:10:18,995 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:18,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:18,996 INFO L85 PathProgramCache]: Analyzing trace with hash -51068352, now seen corresponding path program 1 times [2021-11-03 04:10:18,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:18,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627563544] [2021-11-03 04:10:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:18,997 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:19,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:19,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:19,072 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:19,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627563544] [2021-11-03 04:10:19,073 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627563544] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:19,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:19,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-03 04:10:19,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124659448] [2021-11-03 04:10:19,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:10:19,079 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:19,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:10:19,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:10:19,080 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:19,149 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-11-03 04:10:19,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:10:19,150 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:10:19,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:19,151 INFO L225 Difference]: With dead ends: 21 [2021-11-03 04:10:19,151 INFO L226 Difference]: Without dead ends: 19 [2021-11-03 04:10:19,152 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:19,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-11-03 04:10:19,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2021-11-03 04:10:19,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-11-03 04:10:19,157 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 6 [2021-11-03 04:10:19,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:19,157 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-11-03 04:10:19,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,158 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-11-03 04:10:19,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:10:19,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:19,159 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:19,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-03 04:10:19,160 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:19,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:19,161 INFO L85 PathProgramCache]: Analyzing trace with hash -954906231, now seen corresponding path program 1 times [2021-11-03 04:10:19,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:19,161 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974782282] [2021-11-03 04:10:19,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:19,162 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:19,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:19,239 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:19,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974782282] [2021-11-03 04:10:19,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974782282] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:19,240 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:19,240 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-03 04:10:19,240 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422811950] [2021-11-03 04:10:19,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:10:19,241 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:19,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:10:19,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:19,243 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:19,453 INFO L93 Difference]: Finished difference Result 42 states and 44 transitions. [2021-11-03 04:10:19,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:10:19,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:10:19,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:19,455 INFO L225 Difference]: With dead ends: 42 [2021-11-03 04:10:19,455 INFO L226 Difference]: Without dead ends: 40 [2021-11-03 04:10:19,456 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:10:19,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-03 04:10:19,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 25. [2021-11-03 04:10:19,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 23 states have (on average 1.173913043478261) internal successors, (27), 24 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2021-11-03 04:10:19,461 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 9 [2021-11-03 04:10:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:19,461 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2021-11-03 04:10:19,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:19,462 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2021-11-03 04:10:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:10:19,463 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:19,463 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:19,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-03 04:10:19,463 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:19,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 2052813532, now seen corresponding path program 1 times [2021-11-03 04:10:19,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-03 04:10:19,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141473647] [2021-11-03 04:10:19,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:19,465 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-03 04:10:19,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:19,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:19,752 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-03 04:10:19,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141473647] [2021-11-03 04:10:19,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141473647] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-03 04:10:19,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940821734] [2021-11-03 04:10:19,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:19,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:10:19,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:19,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:10:19,760 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-03 04:10:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:19,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-03 04:10:19,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:19,902 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 13 treesize of output 9 [2021-11-03 04:10:19,963 INFO L354 Elim1Store]: treesize reduction 83, result has 23.9 percent of original size [2021-11-03 04:10:19,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 3 case distinctions, treesize of input 15 treesize of output 31 [2021-11-03 04:10:20,992 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-03 04:10:20,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 420 treesize of output 408 [2021-11-03 04:10:21,144 INFO L354 Elim1Store]: treesize reduction 32, result has 31.9 percent of original size [2021-11-03 04:10:21,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 408 treesize of output 396 [2021-11-03 04:10:21,369 INFO L354 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2021-11-03 04:10:21,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 533 treesize of output 539 [2021-11-03 04:10:22,580 INFO L354 Elim1Store]: treesize reduction 377, result has 21.9 percent of original size [2021-11-03 04:10:22,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 2 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 8 new quantified variables, introduced 26 case distinctions, treesize of input 540 treesize of output 626 [2021-11-03 04:10:22,704 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:22,714 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 591 [2021-11-03 04:10:22,764 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:22,776 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 608 [2021-11-03 04:10:22,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:22,816 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:22,819 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:22,907 INFO L354 Elim1Store]: treesize reduction 108, result has 23.4 percent of original size [2021-11-03 04:10:22,908 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 608 treesize of output 605 [2021-11-03 04:10:22,984 INFO L883 QuantifierPusher]: Run 10 iterations of DualJunctionQuantifierElimination maybe there is a nontermination bug. [2021-11-03 04:10:23,066 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Some non-self update cases but no top-level DER relation [2021-11-03 04:10:23,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [745588896] [2021-11-03 04:10:23,092 INFO L159 IcfgInterpreter]: Started Sifa with 10 locations of interest [2021-11-03 04:10:23,092 INFO L166 IcfgInterpreter]: Building call graph [2021-11-03 04:10:23,098 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-03 04:10:23,104 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-03 04:10:23,105 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-03 04:10:23,139 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,141 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,142 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,143 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 49 [2021-11-03 04:10:23,145 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,145 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,146 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-03 04:10:23,147 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,148 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,149 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,150 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 29 [2021-11-03 04:10:23,151 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 30 [2021-11-03 04:10:23,152 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,152 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,153 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,154 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,155 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 32 [2021-11-03 04:10:23,156 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 33 [2021-11-03 04:10:23,157 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,157 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,158 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 45 [2021-11-03 04:10:23,158 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,163 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,163 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 22 [2021-11-03 04:10:23,164 WARN L197 QuantifierPusher]: Ignoring assumption. [2021-11-03 04:10:23,165 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:23,165 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-11-03 04:10:23,168 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 201 [2021-11-03 04:10:23,179 FATAL L? ?]: Ignoring exception! java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a875baa at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.assertLhs(IncrementalPlicationChecker.java:103) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker.checkPlication(IncrementalPlicationChecker.java:135) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.arrays.ArrayIndexEqualityManager.(ArrayIndexEqualityManager.java:92) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.computeCostEstimation(ElimStorePlain.java:571) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.doElimAllRec(ElimStorePlain.java:444) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.startRecursiveElimination(ElimStorePlain.java:242) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:402) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.quantifier(PartialQuantifierElimination.java:228) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:279) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostcondition(PredicateTransformer.java:131) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.post(SymbolicTools.java:116) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretInternal(DagInterpreter.java:227) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:209) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:609) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:10:23,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2021-11-03 04:10:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2021-11-03 04:10:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970027890] [2021-11-03 04:10:23,181 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-03 04:10:23,181 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-03 04:10:23,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-03 04:10:23,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:10:23,182 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:23,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:10:23,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:23,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:10:23,403 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a875baa at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.assertCodeBlock(IncrementalHoareTripleChecker.java:356) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.prepareAssertionStackAndAddTransition(IncrementalHoareTripleChecker.java:204) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.IncrementalHoareTripleChecker.checkInternal(IncrementalHoareTripleChecker.java:129) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.ProtectiveHoareTripleChecker.checkInternal(ProtectiveHoareTripleChecker.java:61) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.EfficientHoareTripleChecker.checkInternal(EfficientHoareTripleChecker.java:63) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.hoaretriple.CachingHoareTripleChecker.checkInternal(CachingHoareTripleChecker.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton$InternalSuccessorComputationHelper.computeSuccWithSolver(AbstractInterpolantAutomaton.java:357) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.DeterministicInterpolantAutomaton.addOtherSuccessors(DeterministicInterpolantAutomaton.java:198) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:78) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.BasicAbstractInterpolantAutomaton.computeSuccs(BasicAbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:233) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.interpolantautomata.transitionappender.AbstractInterpolantAutomaton.internalSuccessors(AbstractInterpolantAutomaton.java:1) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.TotalizeNwa.internalSuccessors(TotalizeNwa.java:213) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ComplementDeterministicNwa.internalSuccessors(ComplementDeterministicNwa.java:121) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:216) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.ProductNwa.internalSuccessors(ProductNwa.java:208) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.addInternalsAndSuccessors(NestedWordAutomatonReachableStates.java:1058) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates$ReachableStatesComputation.(NestedWordAutomatonReachableStates.java:960) at de.uni_freiburg.informatik.ultimate.automata.nestedword.reachablestates.NestedWordAutomatonReachableStates.(NestedWordAutomatonReachableStates.java:182) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.computeDifference(Difference.java:137) at de.uni_freiburg.informatik.ultimate.automata.nestedword.operations.Difference.(Difference.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.computeAutomataDifference(BasicCegarLoop.java:869) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.refineAbstraction(BasicCegarLoop.java:783) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.refineAbstractionInternal(AbstractCegarLoop.java:462) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:420) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-03 04:10:23,405 INFO L168 Benchmark]: Toolchain (without parser) took 6175.26 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 67.5 MB in the beginning and 81.9 MB in the end (delta: -14.4 MB). Peak memory consumption was 40.3 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,406 INFO L168 Benchmark]: CDTParser took 0.11 ms. Allocated memory is still 102.8 MB. Free memory was 71.8 MB in the beginning and 71.7 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:10:23,406 INFO L168 Benchmark]: CACSL2BoogieTranslator took 493.74 ms. Allocated memory is still 102.8 MB. Free memory was 67.3 MB in the beginning and 70.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,407 INFO L168 Benchmark]: Boogie Procedure Inliner took 62.21 ms. Allocated memory is still 102.8 MB. Free memory was 70.4 MB in the beginning and 68.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,407 INFO L168 Benchmark]: Boogie Preprocessor took 48.06 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 67.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,408 INFO L168 Benchmark]: RCFGBuilder took 723.06 ms. Allocated memory is still 102.8 MB. Free memory was 67.0 MB in the beginning and 46.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,408 INFO L168 Benchmark]: TraceAbstraction took 4839.26 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 45.7 MB in the beginning and 81.9 MB in the end (delta: -36.3 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:23,411 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11 ms. Allocated memory is still 102.8 MB. Free memory was 71.8 MB in the beginning and 71.7 MB in the end (delta: 29.9 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 493.74 ms. Allocated memory is still 102.8 MB. Free memory was 67.3 MB in the beginning and 70.8 MB in the end (delta: -3.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 62.21 ms. Allocated memory is still 102.8 MB. Free memory was 70.4 MB in the beginning and 68.6 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 48.06 ms. Allocated memory is still 102.8 MB. Free memory was 68.6 MB in the beginning and 67.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 723.06 ms. Allocated memory is still 102.8 MB. Free memory was 67.0 MB in the beginning and 46.1 MB in the end (delta: 21.0 MB). Peak memory consumption was 21.0 MB. Max. memory is 16.1 GB. * TraceAbstraction took 4839.26 ms. Allocated memory was 102.8 MB in the beginning and 157.3 MB in the end (delta: 54.5 MB). Free memory was 45.7 MB in the beginning and 81.9 MB in the end (delta: -36.3 MB). Peak memory consumption was 21.6 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a875baa de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: IllegalStateException: ManagedScript already locked by de.uni_freiburg.informatik.ultimate.lib.smtlibutils.IncrementalPlicationChecker@2a875baa: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.lock(ManagedScript.java:81) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-03 04:10:23,462 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/TaipanReach.xml -i ../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-03 04:10:25,848 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-03 04:10:25,852 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-03 04:10:25,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-03 04:10:25,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-03 04:10:25,907 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-03 04:10:25,909 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-03 04:10:25,911 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-03 04:10:25,914 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-03 04:10:25,915 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-03 04:10:25,916 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-03 04:10:25,918 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-03 04:10:25,918 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-03 04:10:25,920 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-03 04:10:25,921 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-03 04:10:25,923 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-03 04:10:25,924 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-03 04:10:25,926 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-03 04:10:25,928 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-03 04:10:25,931 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-03 04:10:25,933 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-03 04:10:25,935 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-03 04:10:25,937 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-03 04:10:25,938 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-03 04:10:25,942 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-03 04:10:25,943 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-03 04:10:25,943 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-03 04:10:25,944 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-03 04:10:25,945 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-03 04:10:25,946 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-03 04:10:25,947 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-03 04:10:25,948 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-03 04:10:25,949 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-03 04:10:25,950 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-03 04:10:25,951 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-03 04:10:25,951 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-03 04:10:25,953 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-03 04:10:25,954 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-03 04:10:25,955 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-03 04:10:25,956 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-03 04:10:25,958 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-03 04:10:25,959 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-03 04:10:25,999 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-03 04:10:25,999 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-03 04:10:26,001 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-03 04:10:26,001 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-03 04:10:26,001 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-03 04:10:26,002 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-03 04:10:26,002 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-03 04:10:26,002 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-03 04:10:26,002 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-03 04:10:26,004 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-03 04:10:26,005 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-03 04:10:26,005 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-03 04:10:26,005 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-03 04:10:26,005 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-03 04:10:26,006 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-03 04:10:26,006 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-03 04:10:26,006 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-03 04:10:26,006 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-03 04:10:26,006 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-03 04:10:26,007 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-03 04:10:26,007 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-03 04:10:26,007 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-03 04:10:26,007 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-03 04:10:26,008 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-03 04:10:26,008 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-03 04:10:26,008 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-03 04:10:26,008 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:26,009 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-03 04:10:26,009 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-03 04:10:26,009 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-03 04:10:26,009 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-03 04:10:26,009 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-03 04:10:26,010 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-03 04:10:26,010 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-03 04:10:26,010 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-03 04:10:26,010 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 95643fe6222ef6bf06c5549a97aa2ed3c03be56764b1592b76d2122ae82e7069 [2021-11-03 04:10:26,417 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-03 04:10:26,437 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-03 04:10:26,440 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-03 04:10:26,441 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-03 04:10:26,442 INFO L275 PluginConnector]: CDTParser initialized [2021-11-03 04:10:26,443 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/../../sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-11-03 04:10:26,532 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/4b0a6d327/255787862ce84358a41218762268da75/FLAG901f5847c [2021-11-03 04:10:27,007 INFO L306 CDTParser]: Found 1 translation units. [2021-11-03 04:10:27,008 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i [2021-11-03 04:10:27,029 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/4b0a6d327/255787862ce84358a41218762268da75/FLAG901f5847c [2021-11-03 04:10:27,357 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/data/4b0a6d327/255787862ce84358a41218762268da75 [2021-11-03 04:10:27,361 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-03 04:10:27,363 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-03 04:10:27,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:27,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-03 04:10:27,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-03 04:10:27,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:27,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d857283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27, skipping insertion in model container [2021-11-03 04:10:27,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:27,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-03 04:10:27,440 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-03 04:10:27,841 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-11-03 04:10:27,844 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-11-03 04:10:27,846 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-11-03 04:10:27,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:27,868 INFO L203 MainTranslator]: Completed pre-run [2021-11-03 04:10:27,928 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22480,22493] [2021-11-03 04:10:27,937 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22552,22565] [2021-11-03 04:10:27,941 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_b757bb56-ac7a-4d45-8e32-f0ce19d14666/sv-benchmarks/c/forester-heap/sll-rb-cnstr_1-2.i[22720,22733] [2021-11-03 04:10:27,949 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-03 04:10:27,986 INFO L208 MainTranslator]: Completed translation [2021-11-03 04:10:27,987 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27 WrapperNode [2021-11-03 04:10:27,987 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-03 04:10:27,988 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:27,989 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-03 04:10:27,989 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-03 04:10:27,996 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,031 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,069 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-03 04:10:28,070 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-03 04:10:28,071 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-03 04:10:28,072 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-03 04:10:28,080 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,080 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,095 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,097 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,111 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,121 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,130 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-03 04:10:28,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-03 04:10:28,145 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-03 04:10:28,145 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-03 04:10:28,146 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (1/1) ... [2021-11-03 04:10:28,152 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-03 04:10:28,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:28,185 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-03 04:10:28,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-03 04:10:28,244 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4 [2021-11-03 04:10:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-03 04:10:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-03 04:10:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-03 04:10:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-03 04:10:28,245 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-03 04:10:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4 [2021-11-03 04:10:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-03 04:10:28,246 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-03 04:10:28,246 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-03 04:10:28,830 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-03 04:10:28,830 INFO L299 CfgBuilder]: Removed 13 assume(true) statements. [2021-11-03 04:10:28,832 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:28 BoogieIcfgContainer [2021-11-03 04:10:28,832 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-03 04:10:28,835 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-03 04:10:28,835 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-03 04:10:28,838 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-03 04:10:28,838 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 04:10:27" (1/3) ... [2021-11-03 04:10:28,839 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd90cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:28, skipping insertion in model container [2021-11-03 04:10:28,839 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 04:10:27" (2/3) ... [2021-11-03 04:10:28,840 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@cd90cbd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 04:10:28, skipping insertion in model container [2021-11-03 04:10:28,840 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:28" (3/3) ... [2021-11-03 04:10:28,841 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-rb-cnstr_1-2.i [2021-11-03 04:10:28,847 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-03 04:10:28,847 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-03 04:10:28,895 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-03 04:10:28,902 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=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-03 04:10:28,902 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-03 04:10:28,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 24 states have (on average 1.875) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:28,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:10:28,921 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:28,922 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:10:28,922 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:28,928 INFO L85 PathProgramCache]: Analyzing trace with hash 889937798, now seen corresponding path program 1 times [2021-11-03 04:10:28,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:28,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [320459487] [2021-11-03 04:10:28,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:28,942 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:28,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:28,946 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:28,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-03 04:10:29,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:29,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-03 04:10:29,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:29,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:29,126 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:29,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:29,158 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:29,158 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [320459487] [2021-11-03 04:10:29,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [320459487] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:29,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:29,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2, 2] imperfect sequences [] total 2 [2021-11-03 04:10:29,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927016128] [2021-11-03 04:10:29,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-03 04:10:29,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-03 04:10:29,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:10:29,210 INFO L87 Difference]: Start difference. First operand has 28 states, 24 states have (on average 1.875) internal successors, (45), 27 states have internal predecessors, (45), 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 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:29,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:29,225 INFO L93 Difference]: Finished difference Result 52 states and 83 transitions. [2021-11-03 04:10:29,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-03 04:10:29,227 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:10:29,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:29,235 INFO L225 Difference]: With dead ends: 52 [2021-11-03 04:10:29,235 INFO L226 Difference]: Without dead ends: 22 [2021-11-03 04:10:29,238 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-03 04:10:29,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-03 04:10:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-03 04:10:29,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 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) [2021-11-03 04:10:29,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2021-11-03 04:10:29,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 6 [2021-11-03 04:10:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:29,269 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2021-11-03 04:10:29,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2021-11-03 04:10:29,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-03 04:10:29,270 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:29,270 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-03 04:10:29,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:29,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:29,484 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:29,484 INFO L85 PathProgramCache]: Analyzing trace with hash 889639888, now seen corresponding path program 1 times [2021-11-03 04:10:29,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:29,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1835159863] [2021-11-03 04:10:29,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:29,485 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:29,485 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:29,486 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:29,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-03 04:10:29,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:29,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-03 04:10:29,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:29,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:29,623 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:29,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:29,646 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:29,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1835159863] [2021-11-03 04:10:29,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1835159863] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:29,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:29,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-03 04:10:29,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276816319] [2021-11-03 04:10:29,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-03 04:10:29,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:29,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-03 04:10:29,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-03 04:10:29,650 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:29,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:29,827 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2021-11-03 04:10:29,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-03 04:10:29,828 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2021-11-03 04:10:29,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:29,829 INFO L225 Difference]: With dead ends: 30 [2021-11-03 04:10:29,830 INFO L226 Difference]: Without dead ends: 28 [2021-11-03 04:10:29,830 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:29,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-03 04:10:29,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 20. [2021-11-03 04:10:29,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2021-11-03 04:10:29,835 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 6 [2021-11-03 04:10:29,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:29,836 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2021-11-03 04:10:29,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:29,836 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2021-11-03 04:10:29,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-11-03 04:10:29,837 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:29,837 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:29,855 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (3)] Ended with exit code 0 [2021-11-03 04:10:30,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:30,049 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:30,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:30,050 INFO L85 PathProgramCache]: Analyzing trace with hash -977335784, now seen corresponding path program 1 times [2021-11-03 04:10:30,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:30,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [652251736] [2021-11-03 04:10:30,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:30,051 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:30,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:30,052 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:30,059 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-03 04:10:30,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:30,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-03 04:10:30,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:30,179 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 13 treesize of output 9 [2021-11-03 04:10:30,265 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 19 treesize of output 7 [2021-11-03 04:10:30,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:30,281 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-03 04:10:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-03 04:10:30,335 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:30,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [652251736] [2021-11-03 04:10:30,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [652251736] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-03 04:10:30,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:30,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [] total 5 [2021-11-03 04:10:30,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265220565] [2021-11-03 04:10:30,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-03 04:10:30,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-03 04:10:30,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-03 04:10:30,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-03 04:10:30,338 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-03 04:10:30,673 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2021-11-03 04:10:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-03 04:10:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2021-11-03 04:10:30,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-03 04:10:30,675 INFO L225 Difference]: With dead ends: 45 [2021-11-03 04:10:30,676 INFO L226 Difference]: Without dead ends: 43 [2021-11-03 04:10:30,676 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-11-03 04:10:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-11-03 04:10:30,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2021-11-03 04:10:30,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.25) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2021-11-03 04:10:30,688 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 9 [2021-11-03 04:10:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-03 04:10:30,689 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2021-11-03 04:10:30,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-03 04:10:30,689 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2021-11-03 04:10:30,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-03 04:10:30,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-03 04:10:30,690 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-03 04:10:30,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:30,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 [2021-11-03 04:10:30,904 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-03 04:10:30,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-03 04:10:30,905 INFO L85 PathProgramCache]: Analyzing trace with hash -822388269, now seen corresponding path program 1 times [2021-11-03 04:10:30,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-03 04:10:30,906 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1951087682] [2021-11-03 04:10:30,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:30,906 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-03 04:10:30,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat [2021-11-03 04:10:30,908 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-03 04:10:30,942 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-03 04:10:31,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:31,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-03 04:10:31,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:31,100 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 13 treesize of output 9 [2021-11-03 04:10:31,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:10:31,181 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:10:31,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-03 04:10:31,193 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:31,195 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 04:10:31,201 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:31,203 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 20 [2021-11-03 04:10:31,363 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-03 04:10:31,364 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 2 case distinctions, treesize of input 60 treesize of output 52 [2021-11-03 04:10:31,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:31,435 INFO L354 Elim1Store]: treesize reduction 41, result has 31.7 percent of original size [2021-11-03 04:10:31,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 49 treesize of output 50 [2021-11-03 04:10:31,453 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:31,511 INFO L354 Elim1Store]: treesize reduction 56, result has 32.5 percent of original size [2021-11-03 04:10:31,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 44 treesize of output 54 [2021-11-03 04:10:31,990 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-03 04:10:31,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1951087682] [2021-11-03 04:10:31,991 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.base] [2021-11-03 04:10:31,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1004829272] [2021-11-03 04:10:31,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:31,992 INFO L168 SolverBuilder]: Constructing external solver with command: cvc4 --incremental --print-success --lang smt [2021-11-03 04:10:31,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/cvc4 [2021-11-03 04:10:31,997 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (exit command is (exit), workingDir is null) [2021-11-03 04:10:32,020 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Waiting until timeout for monitored process [2021-11-03 04:10:32,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:32,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:10:32,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:32,194 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 13 treesize of output 9 [2021-11-03 04:10:32,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:10:32,241 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:32,242 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 04:10:32,247 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:32,267 INFO L354 Elim1Store]: treesize reduction 17, result has 39.3 percent of original size [2021-11-03 04:10:32,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 24 [2021-11-03 04:10:32,294 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-11-03 04:10:32,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-11-03 04:10:32,365 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:32,401 INFO L354 Elim1Store]: treesize reduction 19, result has 32.1 percent of original size [2021-11-03 04:10:32,402 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 58 treesize of output 50 [2021-11-03 04:10:32,408 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:32,410 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 35 [2021-11-03 04:10:32,418 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:32,419 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-03 04:10:32,463 INFO L354 Elim1Store]: treesize reduction 38, result has 35.6 percent of original size [2021-11-03 04:10:32,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 45 [2021-11-03 04:10:32,752 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.base] [2021-11-03 04:10:32,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041302749] [2021-11-03 04:10:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-03 04:10:32,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-03 04:10:32,754 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 [2021-11-03 04:10:32,756 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-03 04:10:32,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-03 04:10:32,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-03 04:10:32,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-03 04:10:32,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-03 04:10:32,889 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-03 04:10:32,899 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 13 treesize of output 9 [2021-11-03 04:10:32,931 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:32,932 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 41 [2021-11-03 04:10:32,938 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-03 04:10:33,001 INFO L354 Elim1Store]: treesize reduction 44, result has 44.3 percent of original size [2021-11-03 04:10:33,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 41 treesize of output 38 [2021-11-03 04:10:33,046 INFO L354 Elim1Store]: treesize reduction 15, result has 46.4 percent of original size [2021-11-03 04:10:33,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 22 treesize of output 29 [2021-11-03 04:10:33,296 INFO L354 Elim1Store]: treesize reduction 102, result has 15.7 percent of original size [2021-11-03 04:10:33,297 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 2 case distinctions, treesize of input 97 treesize of output 89 [2021-11-03 04:10:33,308 INFO L180 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-11-03 04:10:33,309 INFO L185 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 74 [2021-11-03 04:10:33,411 INFO L354 Elim1Store]: treesize reduction 184, result has 12.4 percent of original size [2021-11-03 04:10:33,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 4 case distinctions, treesize of input 74 treesize of output 80 [2021-11-03 04:10:33,452 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-03 04:10:33,453 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 69 [2021-11-03 04:10:33,768 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: Shadow problem: [ULTIMATE.start_main_~end~0.offset, ULTIMATE.start_main_~end~0.base] [2021-11-03 04:10:33,768 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 0 imperfect interpolant sequences. [2021-11-03 04:10:33,768 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [] total 0 [2021-11-03 04:10:33,769 ERROR L172 FreeRefinementEngine]: Strategy WALRUS failed to provide any proof altough trace is infeasible [2021-11-03 04:10:33,769 INFO L627 BasicCegarLoop]: Counterexample might be feasible [2021-11-03 04:10:33,779 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:10:33,794 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:10:33,795 INFO L764 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION [2021-11-03 04:10:33,812 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:34,029 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-03 04:10:34,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt (6)] Forceful destruction successful, exit code 0 [2021-11-03 04:10:34,408 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/mathsat -unsat_core_generation=3,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 -smt2 -in SMTLIB2_COMPLIANT=true,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/cvc4 --incremental --print-success --lang smt [2021-11-03 04:10:34,412 INFO L731 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2021-11-03 04:10:34,414 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-11-03 04:10:34,425 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 03.11 04:10:34 BoogieIcfgContainer [2021-11-03 04:10:34,425 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-11-03 04:10:34,425 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-11-03 04:10:34,425 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-11-03 04:10:34,426 INFO L275 PluginConnector]: Witness Printer initialized [2021-11-03 04:10:34,426 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 04:10:28" (3/4) ... [2021-11-03 04:10:34,429 INFO L140 WitnessPrinter]: No result that supports witness generation found [2021-11-03 04:10:34,429 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-11-03 04:10:34,430 INFO L168 Benchmark]: Toolchain (without parser) took 7067.34 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 45.8 MB in the beginning and 71.1 MB in the end (delta: -25.3 MB). Peak memory consumption was 1.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,431 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 48.3 MB. There was no memory consumed. Max. memory is 16.1 GB. [2021-11-03 04:10:34,431 INFO L168 Benchmark]: CACSL2BoogieTranslator took 623.65 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 43.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,432 INFO L168 Benchmark]: Boogie Procedure Inliner took 81.13 ms. Allocated memory is still 67.1 MB. Free memory was 43.0 MB in the beginning and 41.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,432 INFO L168 Benchmark]: Boogie Preprocessor took 69.14 ms. Allocated memory is still 67.1 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,433 INFO L168 Benchmark]: RCFGBuilder took 692.57 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 39.1 MB in the beginning and 70.6 MB in the end (delta: -31.5 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,433 INFO L168 Benchmark]: TraceAbstraction took 5590.30 ms. Allocated memory is still 94.4 MB. Free memory was 70.3 MB in the beginning and 71.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,434 INFO L168 Benchmark]: Witness Printer took 4.12 ms. Allocated memory is still 94.4 MB. Free memory was 71.9 MB in the beginning and 71.1 MB in the end (delta: 755.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-11-03 04:10:34,436 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 67.1 MB. Free memory is still 48.3 MB. There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 623.65 ms. Allocated memory is still 67.1 MB. Free memory was 45.6 MB in the beginning and 43.2 MB in the end (delta: 2.3 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 81.13 ms. Allocated memory is still 67.1 MB. Free memory was 43.0 MB in the beginning and 41.1 MB in the end (delta: 1.9 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 69.14 ms. Allocated memory is still 67.1 MB. Free memory was 41.1 MB in the beginning and 39.3 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 692.57 ms. Allocated memory was 67.1 MB in the beginning and 94.4 MB in the end (delta: 27.3 MB). Free memory was 39.1 MB in the beginning and 70.6 MB in the end (delta: -31.5 MB). Peak memory consumption was 14.8 MB. Max. memory is 16.1 GB. * TraceAbstraction took 5590.30 ms. Allocated memory is still 94.4 MB. Free memory was 70.3 MB in the beginning and 71.9 MB in the end (delta: -1.6 MB). Peak memory consumption was 35.5 MB. Max. memory is 16.1 GB. * Witness Printer took 4.12 ms. Allocated memory is still 94.4 MB. Free memory was 71.9 MB in the beginning and 71.1 MB in the end (delta: 755.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s 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: 1039]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: unable to decide satisfiability of path constraint. Possible FailurePath: [L1006] SLL* list = malloc(sizeof(SLL)); [L1007] list->next = ((void*)0) [L1008] list->colour = BLACK [L1010] SLL* end = list; [L1013] COND TRUE __VERIFIER_nondet_int() [L1016] end->next = malloc(sizeof(SLL)) [L1017] EXPR end->next [L1017] end = end->next [L1018] end->next = ((void*)0) [L1020] COND FALSE !(__VERIFIER_nondet_int()) [L1026] end->colour = RED [L1027] end->next = malloc(sizeof(SLL)) [L1028] EXPR end->next [L1028] end = end->next [L1029] end->next = ((void*)0) [L1030] end->colour = BLACK [L1013] COND FALSE !(__VERIFIER_nondet_int()) [L1034] end = ((void*)0) [L1035] end = list [L1038] COND FALSE !(!(((void*)0) != end)) [L1039] EXPR end->colour [L1039] COND TRUE !(BLACK == end->colour) [L1039] reach_error() - UnprovableResult [Line: 1038]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1049]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 5.5s, OverallIterations: 4, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 72 SDtfs, 61 SDslu, 51 SDs, 0 SdLazy, 53 SolverSat, 14 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 39 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=28occurred in iteration=0, InterpolantAutomatonStates: 12, 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, 3 MinimizatonAttempts, 25 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.3s InterpolantComputationTime, 32 NumberOfCodeBlocks, 32 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 36 ConstructedInterpolants, 0 QuantifiedInterpolants, 138 SizeOfPredicates, 6 NumberOfNonLiveVariables, 173 ConjunctsInSsa, 25 ConjunctsInUnsatCore, 6 InterpolantComputations, 6 PerfectInterpolantSequences, 0/0 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 [2021-11-03 04:10:34,493 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b757bb56-ac7a-4d45-8e32-f0ce19d14666/bin/utaipan-aC7eJsxGYH/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN