./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 53f42b1a Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P --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 cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-53f42b1 [2021-11-20 23:12:36,682 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-20 23:12:36,685 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-20 23:12:36,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-20 23:12:36,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-20 23:12:36,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-20 23:12:36,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-20 23:12:36,748 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-20 23:12:36,751 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-20 23:12:36,756 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-20 23:12:36,757 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-20 23:12:36,759 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-20 23:12:36,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-20 23:12:36,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-20 23:12:36,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-20 23:12:36,768 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-20 23:12:36,770 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-20 23:12:36,771 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-20 23:12:36,774 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-20 23:12:36,781 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-20 23:12:36,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-20 23:12:36,785 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-20 23:12:36,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-20 23:12:36,789 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-20 23:12:36,797 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-20 23:12:36,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-20 23:12:36,799 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-20 23:12:36,800 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-20 23:12:36,801 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-20 23:12:36,803 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-20 23:12:36,803 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-20 23:12:36,804 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-20 23:12:36,806 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-20 23:12:36,807 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-20 23:12:36,809 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-20 23:12:36,809 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-20 23:12:36,810 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-20 23:12:36,810 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-20 23:12:36,810 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-20 23:12:36,812 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-20 23:12:36,812 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-20 23:12:36,813 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-20 23:12:36,858 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-20 23:12:36,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-20 23:12:36,859 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-20 23:12:36,859 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-20 23:12:36,866 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-20 23:12:36,867 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-20 23:12:36,867 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-20 23:12:36,867 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-20 23:12:36,867 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-20 23:12:36,868 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-20 23:12:36,868 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-20 23:12:36,869 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-20 23:12:36,869 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-20 23:12:36,869 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-20 23:12:36,869 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-20 23:12:36,870 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-20 23:12:36,870 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-20 23:12:36,870 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-20 23:12:36,871 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-20 23:12:36,872 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-20 23:12:36,872 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-20 23:12:36,872 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-20 23:12:36,872 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-20 23:12:36,873 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-20 23:12:36,873 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-20 23:12:36,873 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-20 23:12:36,875 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-20 23:12:36,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-20 23:12:36,875 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-20 23:12:36,875 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-20 23:12:36,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-20 23:12:36,876 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-20 23:12:36,876 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:36,876 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-20 23:12:36,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-20 23:12:36,877 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-20 23:12:36,877 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-20 23:12:36,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-20 23:12:36,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-20 23:12:36,878 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-20 23:12:36,878 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-20 23:12:36,878 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cee8df08ffad3eb9e493a0be0076215dd3a59bce6d2370397b3bb712a7fad867 [2021-11-20 23:12:37,175 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-20 23:12:37,201 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-20 23:12:37,203 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-20 23:12:37,205 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-20 23:12:37,205 INFO L275 PluginConnector]: CDTParser initialized [2021-11-20 23:12:37,206 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/../../sv-benchmarks/c/ldv-sets/test_mutex.i [2021-11-20 23:12:37,297 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/data/13300e8b9/bfac1571d4704d7490bb4b98455ec91a/FLAG589bba71e [2021-11-20 23:12:37,853 INFO L306 CDTParser]: Found 1 translation units. [2021-11-20 23:12:37,854 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i [2021-11-20 23:12:37,870 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/data/13300e8b9/bfac1571d4704d7490bb4b98455ec91a/FLAG589bba71e [2021-11-20 23:12:38,284 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/data/13300e8b9/bfac1571d4704d7490bb4b98455ec91a [2021-11-20 23:12:38,287 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-20 23:12:38,288 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-20 23:12:38,289 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:38,290 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-20 23:12:38,293 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-20 23:12:38,294 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,295 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7df5453d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38, skipping insertion in model container [2021-11-20 23:12:38,295 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,303 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-20 23:12:38,370 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-20 23:12:38,693 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[25842,25855] [2021-11-20 23:12:38,698 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[25967,25980] [2021-11-20 23:12:38,700 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[26082,26095] [2021-11-20 23:12:38,703 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:38,711 INFO L203 MainTranslator]: Completed pre-run [2021-11-20 23:12:38,770 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[25842,25855] [2021-11-20 23:12:38,771 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[25967,25980] [2021-11-20 23:12:38,772 WARN L230 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_877e05ba-dbc6-4ff9-9015-e49fdde337ad/sv-benchmarks/c/ldv-sets/test_mutex.i[26082,26095] [2021-11-20 23:12:38,779 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-20 23:12:38,819 INFO L208 MainTranslator]: Completed translation [2021-11-20 23:12:38,819 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38 WrapperNode [2021-11-20 23:12:38,820 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-20 23:12:38,821 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:38,822 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-20 23:12:38,822 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-20 23:12:38,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,870 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,911 INFO L137 Inliner]: procedures = 139, calls = 57, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 129 [2021-11-20 23:12:38,912 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-20 23:12:38,914 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-20 23:12:38,915 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-20 23:12:38,915 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-20 23:12:38,924 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,924 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,945 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,946 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,957 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,974 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,976 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:38,980 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-20 23:12:38,981 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-20 23:12:38,981 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-20 23:12:38,981 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-20 23:12:38,986 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (1/1) ... [2021-11-20 23:12:39,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-20 23:12:39,010 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:39,024 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-20 23:12:39,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-20 23:12:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-20 23:12:39,080 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-20 23:12:39,080 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-20 23:12:39,080 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-20 23:12:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-20 23:12:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-20 23:12:39,081 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-20 23:12:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-20 23:12:39,081 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-20 23:12:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2021-11-20 23:12:39,082 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2021-11-20 23:12:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-20 23:12:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-20 23:12:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-20 23:12:39,082 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-20 23:12:39,083 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2021-11-20 23:12:39,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2021-11-20 23:12:39,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-20 23:12:39,100 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-20 23:12:39,214 INFO L236 CfgBuilder]: Building ICFG [2021-11-20 23:12:39,215 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-20 23:12:39,618 INFO L277 CfgBuilder]: Performing block encoding [2021-11-20 23:12:39,689 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-20 23:12:39,690 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-20 23:12:39,692 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:39 BoogieIcfgContainer [2021-11-20 23:12:39,692 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-20 23:12:39,694 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-20 23:12:39,694 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-20 23:12:39,700 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-20 23:12:39,700 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 11:12:38" (1/3) ... [2021-11-20 23:12:39,701 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bfea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:39, skipping insertion in model container [2021-11-20 23:12:39,701 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 11:12:38" (2/3) ... [2021-11-20 23:12:39,703 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35bfea5b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 11:12:39, skipping insertion in model container [2021-11-20 23:12:39,703 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 11:12:39" (3/3) ... [2021-11-20 23:12:39,705 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex.i [2021-11-20 23:12:39,710 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-20 23:12:39,710 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-20 23:12:39,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-20 23:12:39,796 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 [2021-11-20 23:12:39,797 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-20 23:12:39,841 INFO L276 IsEmpty]: Start isEmpty. Operand has 49 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2021-11-20 23:12:39,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-20 23:12:39,844 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:39,845 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:39,846 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:39,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:39,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2142385474, now seen corresponding path program 1 times [2021-11-20 23:12:39,859 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:39,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1572217568] [2021-11-20 23:12:39,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:39,860 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:40,144 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:12:40,144 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:40,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1572217568] [2021-11-20 23:12:40,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1572217568] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:40,146 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:40,146 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:12:40,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556032123] [2021-11-20 23:12:40,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:40,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:12:40,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:40,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:12:40,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:40,209 INFO L87 Difference]: Start difference. First operand has 49 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 32 states have internal predecessors, (39), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:12:40,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:40,351 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-11-20 23:12:40,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:12:40,354 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 19 [2021-11-20 23:12:40,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:40,363 INFO L225 Difference]: With dead ends: 96 [2021-11-20 23:12:40,363 INFO L226 Difference]: Without dead ends: 51 [2021-11-20 23:12:40,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:12:40,371 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 0 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:40,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 133 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:12:40,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-20 23:12:40,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-20 23:12:40,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 11 states have call successors, (11), 5 states have call predecessors, (11), 6 states have return successors, (14), 12 states have call predecessors, (14), 11 states have call successors, (14) [2021-11-20 23:12:40,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-20 23:12:40,416 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2021-11-20 23:12:40,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:40,416 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-20 23:12:40,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (4), 1 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:12:40,417 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-20 23:12:40,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-20 23:12:40,419 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:40,419 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:40,419 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-20 23:12:40,419 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:40,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:40,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1125308492, now seen corresponding path program 1 times [2021-11-20 23:12:40,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:40,421 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643905526] [2021-11-20 23:12:40,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:40,421 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:40,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:12:40,775 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:40,777 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643905526] [2021-11-20 23:12:40,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643905526] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:12:40,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:12:40,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-20 23:12:40,779 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248025165] [2021-11-20 23:12:40,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:12:40,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-20 23:12:40,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:12:40,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-20 23:12:40,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-20 23:12:40,789 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:12:41,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:12:41,297 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2021-11-20 23:12:41,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-20 23:12:41,298 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 20 [2021-11-20 23:12:41,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:12:41,301 INFO L225 Difference]: With dead ends: 145 [2021-11-20 23:12:41,301 INFO L226 Difference]: Without dead ends: 100 [2021-11-20 23:12:41,302 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-11-20 23:12:41,304 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 56 mSDsluCounter, 113 mSDsCounter, 0 mSdLazyCounter, 148 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:12:41,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 152 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2021-11-20 23:12:41,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-20 23:12:41,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-11-20 23:12:41,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 50 states have (on average 1.24) internal successors, (62), 54 states have internal predecessors, (62), 18 states have call successors, (18), 9 states have call predecessors, (18), 11 states have return successors, (26), 18 states have call predecessors, (26), 18 states have call successors, (26) [2021-11-20 23:12:41,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-20 23:12:41,324 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 20 [2021-11-20 23:12:41,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:12:41,324 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-20 23:12:41,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 5 states have internal predecessors, (12), 1 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2021-11-20 23:12:41,325 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-20 23:12:41,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-20 23:12:41,327 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:12:41,327 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:12:41,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-20 23:12:41,328 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:12:41,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:12:41,329 INFO L85 PathProgramCache]: Analyzing trace with hash -496526016, now seen corresponding path program 1 times [2021-11-20 23:12:41,329 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:12:41,329 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513219825] [2021-11-20 23:12:41,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:41,329 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:12:41,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:44,549 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-20 23:12:44,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:12:44,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513219825] [2021-11-20 23:12:44,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513219825] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:12:44,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268397412] [2021-11-20 23:12:44,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:12:44,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:12:44,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:12:44,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:12:44,560 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-20 23:12:44,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:12:44,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-20 23:12:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:12:45,104 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:12:45,105 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 17 treesize of output 21 [2021-11-20 23:12:45,387 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-20 23:12:45,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 33 [2021-11-20 23:12:45,636 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 7 treesize of output 3 [2021-11-20 23:12:45,655 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 7 treesize of output 3 [2021-11-20 23:13:32,572 INFO L354 Elim1Store]: treesize reduction 263, result has 20.8 percent of original size [2021-11-20 23:13:32,572 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 317 treesize of output 251 [2021-11-20 23:13:32,747 INFO L354 Elim1Store]: treesize reduction 428, result has 24.6 percent of original size [2021-11-20 23:13:32,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 5 case distinctions, treesize of input 434 treesize of output 295 [2021-11-20 23:13:32,785 INFO L354 Elim1Store]: treesize reduction 28, result has 47.2 percent of original size [2021-11-20 23:13:32,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 353 treesize of output 365 [2021-11-20 23:14:06,226 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:14:06,227 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:14:08,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268397412] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:14:08,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [25951207] [2021-11-20 23:14:08,576 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-20 23:14:08,576 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:14:08,582 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:14:08,588 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:14:08,588 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:14:08,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:14:08,821 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:09,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:09,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:09,472 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:09,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:10,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:14:10,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:14:10,449 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:14:10,572 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:14:10,572 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 1 case distinctions, treesize of input 70 treesize of output 54 [2021-11-20 23:14:10,596 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 23:14:10,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-11-20 23:14:10,619 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:14:10,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-20 23:14:10,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:10,727 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:14:10,727 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:14:10,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:10,842 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:14:10,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:14:10,966 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:14:10,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:14:11,042 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:14:11,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:14:11,156 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:14:11,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:14:11,219 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:14:11,219 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:14:11,309 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:11,319 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:11,347 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:11,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:14:11,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:11,358 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:14:11,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:11,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:14:11,476 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:14:11,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:14:11,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:11,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:14:11,788 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:14:13,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:14:13,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:14:13,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:14:13,999 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:14:14,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:14:14,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:14:14,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:14:14,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:14:15,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:14:15,276 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 61 for LOIs [2021-11-20 23:14:15,673 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 31 for LOIs [2021-11-20 23:14:15,729 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:14:15,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:14:15,774 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 41 for LOIs [2021-11-20 23:14:16,272 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:15:17,514 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:15:17,515 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:15:17,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-11-20 23:15:17,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606533972] [2021-11-20 23:15:17,516 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:15:17,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-20 23:15:17,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:15:17,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-20 23:15:17,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=6359, Unknown=51, NotChecked=0, Total=6806 [2021-11-20 23:15:17,522 INFO L87 Difference]: Start difference. First operand 82 states and 106 transitions. Second operand has 53 states, 33 states have (on average 1.606060606060606) internal successors, (53), 35 states have internal predecessors, (53), 17 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-20 23:16:04,679 WARN L227 SmtUtils]: Spent 6.09s on a formula simplification that was a NOOP. DAG size: 123 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-20 23:16:34,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:16:34,751 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2021-11-20 23:16:34,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-20 23:16:34,753 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 33 states have (on average 1.606060606060606) internal successors, (53), 35 states have internal predecessors, (53), 17 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) Word has length 47 [2021-11-20 23:16:34,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:16:34,756 INFO L225 Difference]: With dead ends: 186 [2021-11-20 23:16:34,756 INFO L226 Difference]: Without dead ends: 144 [2021-11-20 23:16:34,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3780 ImplicationChecksByTransitivity, 199.2s TimeCoverageRelationStatistics Valid=836, Invalid=12655, Unknown=81, NotChecked=0, Total=13572 [2021-11-20 23:16:34,768 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 241 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 245 SdHoareTripleChecker+Valid, 822 SdHoareTripleChecker+Invalid, 2435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 1515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 683 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2021-11-20 23:16:34,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 822 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1515 Invalid, 0 Unknown, 683 Unchecked, 2.3s Time] [2021-11-20 23:16:34,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-20 23:16:34,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-11-20 23:16:34,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 77 states have internal predecessors, (91), 21 states have call successors, (21), 13 states have call predecessors, (21), 18 states have return successors, (33), 22 states have call predecessors, (33), 21 states have call successors, (33) [2021-11-20 23:16:34,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2021-11-20 23:16:34,815 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 47 [2021-11-20 23:16:34,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:16:34,816 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2021-11-20 23:16:34,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 33 states have (on average 1.606060606060606) internal successors, (53), 35 states have internal predecessors, (53), 17 states have call successors, (18), 12 states have call predecessors, (18), 14 states have return successors, (16), 15 states have call predecessors, (16), 15 states have call successors, (16) [2021-11-20 23:16:34,816 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2021-11-20 23:16:34,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-20 23:16:34,825 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:16:34,826 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:16:34,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-20 23:16:35,052 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:35,053 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:16:35,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:16:35,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1682239030, now seen corresponding path program 1 times [2021-11-20 23:16:35,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:16:35,054 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878505830] [2021-11-20 23:16:35,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:35,055 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:16:35,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-20 23:16:36,312 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:16:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878505830] [2021-11-20 23:16:36,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878505830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:36,313 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917384393] [2021-11-20 23:16:36,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:16:36,313 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:16:36,313 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:16:36,315 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:16:36,316 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-20 23:16:36,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:16:36,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-20 23:16:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:16:36,684 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:16:36,684 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 21 treesize of output 25 [2021-11-20 23:16:36,975 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 23:16:36,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 41 [2021-11-20 23:16:39,249 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 7 treesize of output 3 [2021-11-20 23:16:39,259 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 7 treesize of output 3 [2021-11-20 23:16:41,912 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 7 treesize of output 3 [2021-11-20 23:16:41,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:42,129 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:16:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:16:43,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:43,293 INFO L354 Elim1Store]: treesize reduction 1076, result has 18.9 percent of original size [2021-11-20 23:16:43,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 993 treesize of output 518 [2021-11-20 23:16:43,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:43,316 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 721 treesize of output 677 [2021-11-20 23:16:43,560 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-11-20 23:16:43,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 4 disjoint index pairs (out of 15 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 283 treesize of output 195 [2021-11-20 23:16:43,704 INFO L354 Elim1Store]: treesize reduction 49, result has 29.0 percent of original size [2021-11-20 23:16:43,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 71 treesize of output 54 [2021-11-20 23:16:43,862 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-11-20 23:16:43,863 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 41 treesize of output 53 [2021-11-20 23:16:44,856 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-20 23:16:44,857 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:16:47,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917384393] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:16:47,609 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [614798702] [2021-11-20 23:16:47,613 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-20 23:16:47,613 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:16:47,614 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:16:47,614 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:16:47,614 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:16:47,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:16:47,801 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:16:48,186 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:48,202 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:48,341 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:48,354 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:49,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:16:49,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:16:49,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:16:49,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:49,579 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-20 23:16:49,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 58 treesize of output 49 [2021-11-20 23:16:49,614 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:16:49,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2021-11-20 23:16:49,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:49,785 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:16:49,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:16:49,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:49,909 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:16:49,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:16:49,973 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:49,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:16:50,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:50,047 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:16:50,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:50,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:16:50,204 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:16:50,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:16:50,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:50,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:50,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:50,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:16:50,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:50,363 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:16:50,474 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:50,480 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:50,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:16:50,488 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:16:50,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:16:50,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:16:50,771 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:16:52,926 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:52,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:52,949 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:16:52,949 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 38 treesize of output 41 [2021-11-20 23:16:52,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:16:53,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:16:53,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:16:53,399 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:16:53,459 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:16:54,299 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:54,304 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:16:54,322 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:16:54,322 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 39 treesize of output 42 [2021-11-20 23:16:54,375 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:16:54,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:16:54,696 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 66 for LOIs [2021-11-20 23:16:55,076 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-20 23:16:55,112 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:16:55,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:16:55,172 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 30 for LOIs [2021-11-20 23:16:56,230 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:17:05,436 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:17:05,436 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:17:05,436 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-20 23:17:05,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155829496] [2021-11-20 23:17:05,436 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:17:05,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-20 23:17:05,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:05,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-20 23:17:05,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=402, Invalid=5759, Unknown=1, NotChecked=0, Total=6162 [2021-11-20 23:17:05,440 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 49 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 40 states have internal predecessors, (59), 14 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-20 23:17:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:17,227 INFO L93 Difference]: Finished difference Result 365 states and 461 transitions. [2021-11-20 23:17:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-20 23:17:17,229 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 40 states have internal predecessors, (59), 14 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) Word has length 49 [2021-11-20 23:17:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:17,234 INFO L225 Difference]: With dead ends: 365 [2021-11-20 23:17:17,235 INFO L226 Difference]: Without dead ends: 292 [2021-11-20 23:17:17,244 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 88 SyntacticMatches, 6 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6201 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=1390, Invalid=18349, Unknown=1, NotChecked=0, Total=19740 [2021-11-20 23:17:17,245 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 330 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 334 SdHoareTripleChecker+Valid, 846 SdHoareTripleChecker+Invalid, 3271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 1887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 1225 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:17,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 846 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1887 Invalid, 0 Unknown, 1225 Unchecked, 2.4s Time] [2021-11-20 23:17:17,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-20 23:17:17,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 209. [2021-11-20 23:17:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 134 states have (on average 1.2611940298507462) internal successors, (169), 145 states have internal predecessors, (169), 34 states have call successors, (34), 27 states have call predecessors, (34), 39 states have return successors, (55), 36 states have call predecessors, (55), 34 states have call successors, (55) [2021-11-20 23:17:17,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2021-11-20 23:17:17,291 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 49 [2021-11-20 23:17:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:17,291 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2021-11-20 23:17:17,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 35 states have (on average 1.6857142857142857) internal successors, (59), 40 states have internal predecessors, (59), 14 states have call successors, (18), 11 states have call predecessors, (18), 15 states have return successors, (16), 15 states have call predecessors, (16), 14 states have call successors, (16) [2021-11-20 23:17:17,292 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2021-11-20 23:17:17,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-20 23:17:17,294 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:17,294 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:17,317 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:17,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:17,503 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:17,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:17,503 INFO L85 PathProgramCache]: Analyzing trace with hash 925587194, now seen corresponding path program 1 times [2021-11-20 23:17:17,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:17,503 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088096014] [2021-11-20 23:17:17,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:17,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:17,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:17,549 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-20 23:17:17,549 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:17,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088096014] [2021-11-20 23:17:17,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088096014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:17,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229819686] [2021-11-20 23:17:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:17,550 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:17,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:17,551 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:17,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-20 23:17:17,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-20 23:17:17,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:17,802 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-20 23:17:17,802 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:17:17,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229819686] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:17,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:17:17,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-20 23:17:17,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783489579] [2021-11-20 23:17:17,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:17,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:17:17,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:17,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:17:17,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:17,805 INFO L87 Difference]: Start difference. First operand 209 states and 258 transitions. Second operand has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 23:17:17,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:17,893 INFO L93 Difference]: Finished difference Result 331 states and 414 transitions. [2021-11-20 23:17:17,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:17:17,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) Word has length 57 [2021-11-20 23:17:17,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:17,898 INFO L225 Difference]: With dead ends: 331 [2021-11-20 23:17:17,898 INFO L226 Difference]: Without dead ends: 231 [2021-11-20 23:17:17,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:17:17,901 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 100 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:17,902 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 123 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:17:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-20 23:17:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 223. [2021-11-20 23:17:17,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 143 states have (on average 1.2307692307692308) internal successors, (176), 157 states have internal predecessors, (176), 34 states have call successors, (34), 27 states have call predecessors, (34), 44 states have return successors, (61), 38 states have call predecessors, (61), 34 states have call successors, (61) [2021-11-20 23:17:17,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2021-11-20 23:17:17,943 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 57 [2021-11-20 23:17:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:17,943 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2021-11-20 23:17:17,944 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.25) internal successors, (29), 4 states have internal predecessors, (29), 2 states have call successors, (10), 2 states have call predecessors, (10), 3 states have return successors, (9), 3 states have call predecessors, (9), 2 states have call successors, (9) [2021-11-20 23:17:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2021-11-20 23:17:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-20 23:17:17,946 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:17,946 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:17,985 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:18,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:18,154 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 434706162, now seen corresponding path program 1 times [2021-11-20 23:17:18,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:18,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374322073] [2021-11-20 23:17:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:18,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:18,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:18,524 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-20 23:17:18,524 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:18,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374322073] [2021-11-20 23:17:18,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374322073] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:18,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032030523] [2021-11-20 23:17:18,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:18,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:18,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:18,530 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:18,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-20 23:17:18,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:18,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-20 23:17:18,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:18,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:18,884 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:17:18,898 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 7 treesize of output 3 [2021-11-20 23:17:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-20 23:17:19,438 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-20 23:17:19,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032030523] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:17:19,438 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-20 23:17:19,438 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-11-20 23:17:19,438 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788495278] [2021-11-20 23:17:19,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:17:19,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-20 23:17:19,439 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:17:19,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-20 23:17:19,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-20 23:17:19,440 INFO L87 Difference]: Start difference. First operand 223 states and 271 transitions. Second operand has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 23:17:20,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:17:20,170 INFO L93 Difference]: Finished difference Result 312 states and 380 transitions. [2021-11-20 23:17:20,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-20 23:17:20,172 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) Word has length 59 [2021-11-20 23:17:20,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:17:20,174 INFO L225 Difference]: With dead ends: 312 [2021-11-20 23:17:20,174 INFO L226 Difference]: Without dead ends: 159 [2021-11-20 23:17:20,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-11-20 23:17:20,176 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 127 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:17:20,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 145 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-20 23:17:20,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-20 23:17:20,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 119. [2021-11-20 23:17:20,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 77 states have (on average 1.1818181818181819) internal successors, (91), 82 states have internal predecessors, (91), 19 states have call successors, (19), 16 states have call predecessors, (19), 21 states have return successors, (27), 20 states have call predecessors, (27), 19 states have call successors, (27) [2021-11-20 23:17:20,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-11-20 23:17:20,199 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 59 [2021-11-20 23:17:20,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:17:20,200 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-11-20 23:17:20,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.25) internal successors, (34), 8 states have internal predecessors, (34), 4 states have call successors, (10), 4 states have call predecessors, (10), 5 states have return successors, (9), 4 states have call predecessors, (9), 4 states have call successors, (9) [2021-11-20 23:17:20,200 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-11-20 23:17:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-20 23:17:20,202 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:17:20,202 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:17:20,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-20 23:17:20,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:20,418 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:17:20,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:17:20,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116726, now seen corresponding path program 1 times [2021-11-20 23:17:20,419 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:17:20,419 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888122649] [2021-11-20 23:17:20,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:20,419 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:17:20,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 23:17:20,695 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:17:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888122649] [2021-11-20 23:17:20,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888122649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:20,695 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779117839] [2021-11-20 23:17:20,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:17:20,695 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:17:20,696 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:17:20,697 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:17:20,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-20 23:17:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:17:20,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-20 23:17:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:17:20,945 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:17:20,945 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 21 treesize of output 25 [2021-11-20 23:17:21,105 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-20 23:17:21,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 30 treesize of output 41 [2021-11-20 23:17:21,668 INFO L354 Elim1Store]: treesize reduction 185, result has 18.5 percent of original size [2021-11-20 23:17:21,669 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 3 case distinctions, treesize of input 77 treesize of output 49 [2021-11-20 23:17:22,138 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-20 23:17:22,139 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 80 treesize of output 84 [2021-11-20 23:17:24,569 INFO L354 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2021-11-20 23:17:24,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 48 treesize of output 50 [2021-11-20 23:17:29,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-20 23:17:29,976 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:17:30,804 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 7 treesize of output 3 [2021-11-20 23:17:31,950 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 1466 treesize of output 1450 [2021-11-20 23:17:32,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:32,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:32,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:32,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1779117839] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:17:32,921 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [545425985] [2021-11-20 23:17:32,925 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 23:17:32,925 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:17:32,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:17:32,926 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:17:32,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:17:33,186 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:17:33,234 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:17:33,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:33,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:34,056 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:34,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:35,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:17:35,571 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:17:35,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:17:35,784 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:35,952 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:17:35,952 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:17:36,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:36,113 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-20 23:17:36,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 58 treesize of output 49 [2021-11-20 23:17:36,195 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:17:36,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2021-11-20 23:17:36,256 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:36,491 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:17:36,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:17:36,616 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:17:36,617 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:17:36,798 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:17:36,798 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:17:36,999 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:17:37,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:17:37,069 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:17:37,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:17:37,277 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:37,278 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:17:37,292 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:37,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:37,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:17:37,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:37,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:37,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:17:37,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:37,576 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:17:37,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:17:37,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:17:38,422 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:17:41,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:17:41,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:17:41,655 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:41,663 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:41,695 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:17:41,695 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 39 treesize of output 42 [2021-11-20 23:17:42,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:17:42,142 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:42,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:42,179 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:17:42,180 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 38 treesize of output 41 [2021-11-20 23:17:42,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:42,238 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:17:42,269 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:17:42,270 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 39 treesize of output 42 [2021-11-20 23:17:44,029 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:17:44,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:17:44,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:17:44,343 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 61 for LOIs [2021-11-20 23:17:44,778 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-20 23:17:44,822 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:17:44,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:17:44,934 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 31 for LOIs [2021-11-20 23:17:45,661 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 34 for LOIs [2021-11-20 23:17:46,564 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:18:05,030 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:18:05,030 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:18:05,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 35 [2021-11-20 23:18:05,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457065395] [2021-11-20 23:18:05,030 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:18:05,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-20 23:18:05,031 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:18:05,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-20 23:18:05,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=4883, Unknown=3, NotChecked=0, Total=5256 [2021-11-20 23:18:05,035 INFO L87 Difference]: Start difference. First operand 119 states and 137 transitions. Second operand has 35 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 31 states have internal predecessors, (70), 17 states have call successors, (23), 7 states have call predecessors, (23), 16 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2021-11-20 23:18:32,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:18:32,058 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2021-11-20 23:18:32,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-20 23:18:32,058 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 31 states have internal predecessors, (70), 17 states have call successors, (23), 7 states have call predecessors, (23), 16 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) Word has length 66 [2021-11-20 23:18:32,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:18:32,060 INFO L225 Difference]: With dead ends: 207 [2021-11-20 23:18:32,060 INFO L226 Difference]: Without dead ends: 152 [2021-11-20 23:18:32,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3251 ImplicationChecksByTransitivity, 52.1s TimeCoverageRelationStatistics Valid=911, Invalid=10858, Unknown=3, NotChecked=0, Total=11772 [2021-11-20 23:18:32,066 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 191 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 510 SdHoareTripleChecker+Invalid, 1314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 854 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 349 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2021-11-20 23:18:32,066 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 510 Invalid, 1314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 854 Invalid, 0 Unknown, 349 Unchecked, 2.4s Time] [2021-11-20 23:18:32,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-20 23:18:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2021-11-20 23:18:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 79 states have (on average 1.1645569620253164) internal successors, (92), 83 states have internal predecessors, (92), 19 states have call successors, (19), 17 states have call predecessors, (19), 21 states have return successors, (26), 20 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-20 23:18:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-11-20 23:18:32,088 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 66 [2021-11-20 23:18:32,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:18:32,089 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-11-20 23:18:32,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 24 states have (on average 2.9166666666666665) internal successors, (70), 31 states have internal predecessors, (70), 17 states have call successors, (23), 7 states have call predecessors, (23), 16 states have return successors, (22), 17 states have call predecessors, (22), 17 states have call successors, (22) [2021-11-20 23:18:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-11-20 23:18:32,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-20 23:18:32,091 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:18:32,091 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:18:32,123 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-20 23:18:32,302 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:32,306 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:18:32,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:18:32,306 INFO L85 PathProgramCache]: Analyzing trace with hash -607545132, now seen corresponding path program 1 times [2021-11-20 23:18:32,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:18:32,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226515261] [2021-11-20 23:18:32,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:32,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:18:32,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:32,905 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-20 23:18:32,905 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:18:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226515261] [2021-11-20 23:18:32,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226515261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:18:32,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177396257] [2021-11-20 23:18:32,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:18:32,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:18:32,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:18:32,907 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:18:32,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-20 23:18:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:18:33,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-20 23:18:33,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:18:34,187 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-20 23:18:34,188 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 3 case distinctions, treesize of input 155 treesize of output 145 [2021-11-20 23:18:34,437 INFO L354 Elim1Store]: treesize reduction 245, result has 19.1 percent of original size [2021-11-20 23:18:34,437 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 3 case distinctions, treesize of input 182 treesize of output 153 [2021-11-20 23:18:49,147 INFO L354 Elim1Store]: treesize reduction 22, result has 75.8 percent of original size [2021-11-20 23:18:49,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 6 new quantified variables, introduced 6 case distinctions, treesize of input 190 treesize of output 198 [2021-11-20 23:18:49,266 INFO L354 Elim1Store]: treesize reduction 56, result has 30.9 percent of original size [2021-11-20 23:18:49,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 194 treesize of output 153 [2021-11-20 23:19:15,292 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-20 23:19:15,293 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:19:17,922 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-20 23:19:17,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177396257] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:19:17,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1740620902] [2021-11-20 23:19:17,925 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 23:19:17,925 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:19:17,926 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:19:17,926 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:19:17,926 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:19:18,253 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:19:18,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:19:18,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:19,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:19,338 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:19,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:21,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:19:21,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:19:21,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:19:21,947 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:22,290 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:19:22,290 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:19:22,410 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:22,543 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-20 23:19:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 58 treesize of output 49 [2021-11-20 23:19:22,635 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:19:22,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2021-11-20 23:19:22,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:22,943 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:19:22,944 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:19:23,132 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:23,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:19:23,285 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:23,285 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:19:23,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:23,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:19:23,655 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:19:23,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:19:23,951 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:23,951 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:19:23,983 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:23,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:23,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:19:24,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:24,258 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:24,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:19:24,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:24,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:19:24,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:19:24,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:19:25,441 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:19:29,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:19:29,652 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 21 treesize of output 17 [2021-11-20 23:19:29,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:19:30,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:19:30,282 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:19:30,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:19:32,376 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:19:32,387 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:19:32,431 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:19:32,431 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 38 treesize of output 41 [2021-11-20 23:19:32,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:19:32,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:19:32,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:19:32,605 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:19:32,605 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 39 treesize of output 42 [2021-11-20 23:19:32,988 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 66 for LOIs [2021-11-20 23:19:33,515 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-20 23:19:33,556 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:19:33,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:19:33,720 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 31 for LOIs [2021-11-20 23:19:34,817 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 34 for LOIs [2021-11-20 23:19:36,806 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:20:00,346 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:20:00,346 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:20:00,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 7] total 31 [2021-11-20 23:20:00,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197374523] [2021-11-20 23:20:00,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:20:00,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-20 23:20:00,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-20 23:20:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2868, Unknown=5, NotChecked=0, Total=3192 [2021-11-20 23:20:00,349 INFO L87 Difference]: Start difference. First operand 121 states and 137 transitions. Second operand has 31 states, 26 states have (on average 3.730769230769231) internal successors, (97), 30 states have internal predecessors, (97), 14 states have call successors, (34), 8 states have call predecessors, (34), 16 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-20 23:20:19,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:19,291 INFO L93 Difference]: Finished difference Result 242 states and 291 transitions. [2021-11-20 23:20:19,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-20 23:20:19,292 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 26 states have (on average 3.730769230769231) internal successors, (97), 30 states have internal predecessors, (97), 14 states have call successors, (34), 8 states have call predecessors, (34), 16 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) Word has length 68 [2021-11-20 23:20:19,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:19,295 INFO L225 Difference]: With dead ends: 242 [2021-11-20 23:20:19,295 INFO L226 Difference]: Without dead ends: 203 [2021-11-20 23:20:19,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 158 SyntacticMatches, 10 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=721, Invalid=7104, Unknown=7, NotChecked=0, Total=7832 [2021-11-20 23:20:19,297 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 215 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 244 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:19,298 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 628 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 871 Invalid, 0 Unknown, 244 Unchecked, 2.8s Time] [2021-11-20 23:20:19,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-20 23:20:19,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2021-11-20 23:20:19,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 106 states have (on average 1.2169811320754718) internal successors, (129), 111 states have internal predecessors, (129), 23 states have call successors, (23), 22 states have call predecessors, (23), 27 states have return successors, (33), 24 states have call predecessors, (33), 23 states have call successors, (33) [2021-11-20 23:20:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2021-11-20 23:20:19,323 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 68 [2021-11-20 23:20:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:19,324 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2021-11-20 23:20:19,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 26 states have (on average 3.730769230769231) internal successors, (97), 30 states have internal predecessors, (97), 14 states have call successors, (34), 8 states have call predecessors, (34), 16 states have return successors, (32), 14 states have call predecessors, (32), 14 states have call successors, (32) [2021-11-20 23:20:19,324 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2021-11-20 23:20:19,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-20 23:20:19,325 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:19,325 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:19,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-20 23:20:19,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:19,535 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:19,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:19,535 INFO L85 PathProgramCache]: Analyzing trace with hash -787038246, now seen corresponding path program 2 times [2021-11-20 23:20:19,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:19,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86823085] [2021-11-20 23:20:19,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:19,536 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:19,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:19,618 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-20 23:20:19,619 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:19,619 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86823085] [2021-11-20 23:20:19,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86823085] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-20 23:20:19,619 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-20 23:20:19,619 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-20 23:20:19,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232595488] [2021-11-20 23:20:19,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-20 23:20:19,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-20 23:20:19,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:20:19,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-20 23:20:19,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:20:19,621 INFO L87 Difference]: Start difference. First operand 158 states and 185 transitions. Second operand has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 23:20:19,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:20:19,763 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2021-11-20 23:20:19,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-20 23:20:19,763 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) Word has length 69 [2021-11-20 23:20:19,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:20:19,765 INFO L225 Difference]: With dead ends: 176 [2021-11-20 23:20:19,765 INFO L226 Difference]: Without dead ends: 174 [2021-11-20 23:20:19,766 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-20 23:20:19,767 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2021-11-20 23:20:19,767 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2021-11-20 23:20:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-20 23:20:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-20 23:20:19,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 118 states have (on average 1.194915254237288) internal successors, (141), 123 states have internal predecessors, (141), 23 states have call successors, (23), 22 states have call predecessors, (23), 31 states have return successors, (38), 28 states have call predecessors, (38), 23 states have call successors, (38) [2021-11-20 23:20:19,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2021-11-20 23:20:19,807 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 69 [2021-11-20 23:20:19,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:20:19,808 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2021-11-20 23:20:19,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.75) internal successors, (27), 4 states have internal predecessors, (27), 1 states have call successors, (10), 1 states have call predecessors, (10), 2 states have return successors, (9), 2 states have call predecessors, (9), 1 states have call successors, (9) [2021-11-20 23:20:19,809 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2021-11-20 23:20:19,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-20 23:20:19,810 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:20:19,810 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:20:19,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-20 23:20:19,811 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:20:19,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:20:19,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1495072738, now seen corresponding path program 3 times [2021-11-20 23:20:19,812 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:20:19,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800812922] [2021-11-20 23:20:19,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:20:19,812 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:20:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:20:25,135 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 20 proven. 31 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-20 23:20:25,136 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:20:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800812922] [2021-11-20 23:20:25,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800812922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:20:25,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189053252] [2021-11-20 23:20:25,136 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-20 23:20:25,136 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:20:25,137 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:20:25,137 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:20:25,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-20 23:20:25,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-20 23:20:25,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:20:25,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 165 conjunts are in the unsatisfiable core [2021-11-20 23:20:25,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:20:26,285 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-20 23:20:26,286 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 3 case distinctions, treesize of input 155 treesize of output 145 [2021-11-20 23:20:26,540 INFO L354 Elim1Store]: treesize reduction 185, result has 18.5 percent of original size [2021-11-20 23:20:26,540 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 3 case distinctions, treesize of input 145 treesize of output 116 [2021-11-20 23:20:28,561 INFO L354 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2021-11-20 23:20:28,562 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 216 treesize of output 173 [2021-11-20 23:20:28,851 INFO L354 Elim1Store]: treesize reduction 20, result has 71.0 percent of original size [2021-11-20 23:20:28,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 171 treesize of output 144 [2021-11-20 23:20:33,795 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 40 proven. 8 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-20 23:20:33,795 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:20:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 36 proven. 5 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-20 23:20:40,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189053252] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-20 23:20:40,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1954297181] [2021-11-20 23:20:40,367 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 23:20:40,368 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:20:40,368 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:20:40,368 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:20:40,368 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:20:40,663 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:20:40,735 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:20:41,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:41,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:41,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:41,904 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:44,321 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:20:44,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:20:44,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:20:44,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:44,924 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:20:44,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:20:45,013 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:45,373 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:20:45,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:20:45,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:45,654 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-20 23:20:45,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 58 treesize of output 49 [2021-11-20 23:20:45,749 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:20:45,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 42 treesize of output 40 [2021-11-20 23:20:45,924 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:45,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:20:46,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:46,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:20:46,352 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:46,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:20:46,538 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:20:46,538 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:20:46,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:46,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:46,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:20:46,798 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:46,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:20:46,846 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:47,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:47,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:20:47,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:47,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:20:47,161 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:20:47,162 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:20:48,316 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:20:52,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:52,500 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:52,547 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:20:52,547 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 44 [2021-11-20 23:20:52,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:52,616 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:52,664 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:20:52,664 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 40 treesize of output 43 [2021-11-20 23:20:52,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:20:53,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:53,382 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:53,444 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:20:53,445 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 38 treesize of output 41 [2021-11-20 23:20:53,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:20:53,743 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:53,758 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:20:53,823 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:20:53,823 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 39 treesize of output 42 [2021-11-20 23:20:55,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:20:56,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:20:56,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:20:56,339 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 62 for LOIs [2021-11-20 23:20:56,919 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-20 23:20:56,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:20:57,009 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:20:57,128 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 31 for LOIs [2021-11-20 23:20:58,270 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 34 for LOIs [2021-11-20 23:21:00,402 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:21:22,587 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:21:22,588 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-20 23:21:22,588 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 21, 14] total 60 [2021-11-20 23:21:22,588 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971219842] [2021-11-20 23:21:22,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-20 23:21:22,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-20 23:21:22,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:21:22,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-20 23:21:22,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=6955, Unknown=0, NotChecked=0, Total=7310 [2021-11-20 23:21:22,592 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 60 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 48 states have internal predecessors, (98), 22 states have call successors, (32), 8 states have call predecessors, (32), 15 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2021-11-20 23:21:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:21:51,788 INFO L93 Difference]: Finished difference Result 309 states and 365 transitions. [2021-11-20 23:21:51,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 23:21:51,789 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 48 states have internal predecessors, (98), 22 states have call successors, (32), 8 states have call predecessors, (32), 15 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) Word has length 70 [2021-11-20 23:21:51,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:21:51,791 INFO L225 Difference]: With dead ends: 309 [2021-11-20 23:21:51,791 INFO L226 Difference]: Without dead ends: 201 [2021-11-20 23:21:51,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 161 SyntacticMatches, 6 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4473 ImplicationChecksByTransitivity, 54.3s TimeCoverageRelationStatistics Valid=1070, Invalid=16222, Unknown=0, NotChecked=0, Total=17292 [2021-11-20 23:21:51,795 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 401 mSDsluCounter, 709 mSDsCounter, 0 mSdLazyCounter, 2327 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 401 SdHoareTripleChecker+Valid, 640 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 2327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.7s IncrementalHoareTripleChecker+Time [2021-11-20 23:21:51,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [401 Valid, 640 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 2327 Invalid, 0 Unknown, 0 Unchecked, 7.7s Time] [2021-11-20 23:21:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2021-11-20 23:21:51,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 139. [2021-11-20 23:21:51,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 94 states have (on average 1.1595744680851063) internal successors, (109), 97 states have internal predecessors, (109), 19 states have call successors, (19), 19 states have call predecessors, (19), 24 states have return successors, (26), 22 states have call predecessors, (26), 19 states have call successors, (26) [2021-11-20 23:21:51,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-11-20 23:21:51,819 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 70 [2021-11-20 23:21:51,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:21:51,820 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-11-20 23:21:51,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 48 states have internal predecessors, (98), 22 states have call successors, (32), 8 states have call predecessors, (32), 15 states have return successors, (30), 20 states have call predecessors, (30), 20 states have call successors, (30) [2021-11-20 23:21:51,821 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-11-20 23:21:51,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-20 23:21:51,822 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:21:51,822 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:21:51,852 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-20 23:21:52,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:52,042 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:21:52,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:21:52,043 INFO L85 PathProgramCache]: Analyzing trace with hash 2026370436, now seen corresponding path program 1 times [2021-11-20 23:21:52,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:21:52,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659744546] [2021-11-20 23:21:52,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:52,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:21:52,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:53,004 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-20 23:21:53,004 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:21:53,004 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659744546] [2021-11-20 23:21:53,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659744546] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:21:53,005 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107615673] [2021-11-20 23:21:53,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:21:53,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:21:53,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:21:53,006 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:21:53,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-20 23:21:53,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:21:53,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 200 conjunts are in the unsatisfiable core [2021-11-20 23:21:53,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:21:53,631 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:21:53,631 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 21 treesize of output 25 [2021-11-20 23:21:54,079 INFO L354 Elim1Store]: treesize reduction 36, result has 23.4 percent of original size [2021-11-20 23:21:54,079 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 3 case distinctions, treesize of input 25 treesize of output 30 [2021-11-20 23:21:55,483 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:21:55,993 INFO L354 Elim1Store]: treesize reduction 78, result has 26.4 percent of original size [2021-11-20 23:21:55,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 35 treesize of output 53 [2021-11-20 23:21:58,760 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 [2021-11-20 23:21:58,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:21:58,817 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:21:58,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 24 [2021-11-20 23:22:42,322 INFO L354 Elim1Store]: treesize reduction 140, result has 24.7 percent of original size [2021-11-20 23:22:42,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 238 treesize of output 158 [2021-11-20 23:22:42,599 INFO L354 Elim1Store]: treesize reduction 253, result has 27.7 percent of original size [2021-11-20 23:22:42,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 2 case distinctions, treesize of input 286 treesize of output 250 [2021-11-20 23:22:43,815 INFO L354 Elim1Store]: treesize reduction 64, result has 34.0 percent of original size [2021-11-20 23:22:43,816 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 50 treesize of output 68 [2021-11-20 23:22:48,854 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 37 proven. 26 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-11-20 23:22:48,855 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:22:55,020 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 582 treesize of output 530 [2021-11-20 23:22:55,037 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 362 treesize of output 358 [2021-11-20 23:22:57,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107615673] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:22:57,649 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [565763046] [2021-11-20 23:22:57,652 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 23:22:57,652 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:22:57,653 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:22:57,653 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:22:57,653 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:22:57,954 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:22:57,968 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:22:58,787 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:22:58,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:22:59,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:22:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:23:01,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:23:01,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:23:01,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-20 23:23:01,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:01,866 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:23:01,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:23:01,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:02,244 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-20 23:23:02,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 49 [2021-11-20 23:23:02,425 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:23:02,426 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 1 case distinctions, treesize of input 70 treesize of output 54 [2021-11-20 23:23:02,529 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-20 23:23:02,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 54 treesize of output 46 [2021-11-20 23:23:02,627 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-20 23:23:02,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 44 [2021-11-20 23:23:02,878 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:23:02,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:23:02,986 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:23:02,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:23:03,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:23:03,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:23:03,339 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-20 23:23:03,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-20 23:23:03,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:03,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:23:03,533 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:23:03,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:03,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:23:03,608 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:23:03,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:03,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:23:03,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:03,869 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-20 23:23:03,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:23:03,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:23:04,997 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 78 for LOIs [2021-11-20 23:23:09,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 18 treesize of output 14 [2021-11-20 23:23:09,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:23:09,197 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2021-11-20 23:23:09,866 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:09,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:09,936 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:23:09,937 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 39 treesize of output 42 [2021-11-20 23:23:10,015 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:10,030 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:10,088 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:23:10,089 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 38 treesize of output 41 [2021-11-20 23:23:10,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 15 treesize of output 1 [2021-11-20 23:23:11,758 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 20 treesize of output 16 [2021-11-20 23:23:11,812 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:11,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:11,866 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:23:11,866 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 44 [2021-11-20 23:23:11,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 0 case distinctions, treesize of input 19 treesize of output 1 [2021-11-20 23:23:12,323 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 65 for LOIs [2021-11-20 23:23:12,923 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 21 for LOIs [2021-11-20 23:23:12,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:23:13,032 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:23:13,146 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 31 for LOIs [2021-11-20 23:23:14,042 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 41 for LOIs [2021-11-20 23:23:16,048 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-20 23:23:34,794 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-20 23:23:34,795 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-20 23:23:34,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37] total 51 [2021-11-20 23:23:34,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857358543] [2021-11-20 23:23:34,795 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-20 23:23:34,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-20 23:23:34,796 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-20 23:23:34,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-20 23:23:34,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=6985, Unknown=18, NotChecked=0, Total=7482 [2021-11-20 23:23:34,798 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 51 states, 35 states have (on average 2.257142857142857) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (26), 21 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-20 23:23:43,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-20 23:23:43,517 INFO L93 Difference]: Finished difference Result 236 states and 270 transitions. [2021-11-20 23:23:43,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-20 23:23:43,518 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 35 states have (on average 2.257142857142857) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (26), 21 states have call predecessors, (26), 20 states have call successors, (26) Word has length 75 [2021-11-20 23:23:43,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-20 23:23:43,519 INFO L225 Difference]: With dead ends: 236 [2021-11-20 23:23:43,520 INFO L226 Difference]: Without dead ends: 140 [2021-11-20 23:23:43,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 95 SyntacticMatches, 4 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4348 ImplicationChecksByTransitivity, 79.3s TimeCoverageRelationStatistics Valid=761, Invalid=12331, Unknown=18, NotChecked=0, Total=13110 [2021-11-20 23:23:43,523 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 44 mSDsluCounter, 821 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 763 SdHoareTripleChecker+Invalid, 937 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 381 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2021-11-20 23:23:43,523 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [48 Valid, 763 Invalid, 937 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 536 Invalid, 0 Unknown, 381 Unchecked, 1.9s Time] [2021-11-20 23:23:43,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-20 23:23:43,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 135. [2021-11-20 23:23:43,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 92 states have (on average 1.173913043478261) internal successors, (108), 94 states have internal predecessors, (108), 18 states have call successors, (18), 18 states have call predecessors, (18), 23 states have return successors, (25), 22 states have call predecessors, (25), 18 states have call successors, (25) [2021-11-20 23:23:43,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-11-20 23:23:43,545 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 75 [2021-11-20 23:23:43,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-20 23:23:43,546 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-11-20 23:23:43,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 35 states have (on average 2.257142857142857) internal successors, (79), 40 states have internal predecessors, (79), 21 states have call successors, (28), 11 states have call predecessors, (28), 17 states have return successors, (26), 21 states have call predecessors, (26), 20 states have call successors, (26) [2021-11-20 23:23:43,546 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-11-20 23:23:43,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-20 23:23:43,547 INFO L506 BasicCegarLoop]: Found error trace [2021-11-20 23:23:43,548 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-20 23:23:43,570 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-20 23:23:43,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-20 23:23:43,750 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-20 23:23:43,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-20 23:23:43,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1481860624, now seen corresponding path program 2 times [2021-11-20 23:23:43,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-20 23:23:43,751 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778028157] [2021-11-20 23:23:43,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-20 23:23:43,752 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-20 23:23:43,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-20 23:23:47,566 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-20 23:23:47,566 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-20 23:23:47,566 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778028157] [2021-11-20 23:23:47,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778028157] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-20 23:23:47,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339121341] [2021-11-20 23:23:47,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-20 23:23:47,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-20 23:23:47,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 [2021-11-20 23:23:47,568 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-20 23:23:47,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_877e05ba-dbc6-4ff9-9015-e49fdde337ad/bin/utaipan-TEXQjIfE4P/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-20 23:23:48,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-20 23:23:48,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-20 23:23:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 184 conjunts are in the unsatisfiable core [2021-11-20 23:23:48,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-20 23:23:49,228 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:23:50,907 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:23:51,492 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-20 23:23:51,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 17 treesize of output 21 [2021-11-20 23:23:54,385 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:54,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 51 treesize of output 43 [2021-11-20 23:23:54,412 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:54,457 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-20 23:23:54,457 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 43 treesize of output 46 [2021-11-20 23:23:54,891 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 26 treesize of output 22 [2021-11-20 23:23:54,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2021-11-20 23:23:55,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:55,659 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-20 23:23:55,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 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 77 treesize of output 68 [2021-11-20 23:23:56,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:56,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:56,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-20 23:23:56,371 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-20 23:23:56,643 INFO L354 Elim1Store]: treesize reduction 182, result has 24.8 percent of original size [2021-11-20 23:23:56,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 272 treesize of output 206 [2021-11-20 23:23:57,981 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-11-20 23:23:57,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 24 treesize of output 30 [2021-11-20 23:24:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 51 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-20 23:24:03,954 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-20 23:24:09,166 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 441 treesize of output 401 [2021-11-20 23:24:09,178 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 497 treesize of output 445 [2021-11-20 23:24:11,637 INFO L354 Elim1Store]: treesize reduction 89, result has 78.0 percent of original size [2021-11-20 23:24:11,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 10 case distinctions, treesize of input 947084 treesize of output 855003 [2021-11-20 23:25:13,128 WARN L227 SmtUtils]: Spent 1.02m on a formula simplification. DAG size of input: 875 DAG size of output: 871 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:25:58,084 WARN L227 SmtUtils]: Spent 44.95s on a formula simplification. DAG size of input: 824 DAG size of output: 824 (called from [L1066] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2021-11-20 23:25:58,098 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_DEPENDING: BigInteger out of long range [2021-11-20 23:25:58,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [542524162] [2021-11-20 23:25:58,101 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-20 23:25:58,101 INFO L166 IcfgInterpreter]: Building call graph [2021-11-20 23:25:58,101 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-20 23:25:58,102 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-20 23:25:58,102 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-20 23:25:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 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 0 case distinctions, treesize of input 12 treesize of output 9 [2021-11-20 23:25:58,446 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 0 case distinctions, treesize of input 6 treesize of output 5 [2021-11-20 23:25:59,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:25:59,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:25:59,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-11-20 23:25:59,631 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3