./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version aef121e0 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V --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 d82f1b23bea4834b28dfbe602ddf1f3e06a3ee60a847e3002a9403f092f2c830 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 02:55:26,942 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 02:55:26,946 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 02:55:27,019 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 02:55:27,020 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 02:55:27,026 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 02:55:27,028 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 02:55:27,034 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 02:55:27,038 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 02:55:27,047 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 02:55:27,049 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 02:55:27,051 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 02:55:27,052 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 02:55:27,055 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 02:55:27,058 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 02:55:27,067 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 02:55:27,070 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 02:55:27,072 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 02:55:27,075 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 02:55:27,083 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 02:55:27,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 02:55:27,088 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 02:55:27,092 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 02:55:27,094 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 02:55:27,107 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 02:55:27,108 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 02:55:27,108 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 02:55:27,110 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 02:55:27,111 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 02:55:27,113 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 02:55:27,114 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 02:55:27,115 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 02:55:27,117 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 02:55:27,119 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 02:55:27,121 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 02:55:27,121 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 02:55:27,122 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 02:55:27,122 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 02:55:27,123 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 02:55:27,124 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 02:55:27,125 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 02:55:27,126 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Default.epf [2021-11-23 02:55:27,181 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 02:55:27,182 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 02:55:27,183 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 02:55:27,183 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 02:55:27,184 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 02:55:27,184 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 02:55:27,185 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 02:55:27,185 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 02:55:27,185 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 02:55:27,186 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2021-11-23 02:55:27,187 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 02:55:27,187 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 02:55:27,188 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2021-11-23 02:55:27,188 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2021-11-23 02:55:27,188 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 02:55:27,188 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2021-11-23 02:55:27,189 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2021-11-23 02:55:27,189 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2021-11-23 02:55:27,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 02:55:27,190 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 02:55:27,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-23 02:55:27,191 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 02:55:27,191 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 02:55:27,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 02:55:27,192 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 02:55:27,192 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 02:55:27,194 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 02:55:27,194 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 02:55:27,194 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 02:55:27,195 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 02:55:27,195 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 02:55:27,195 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 02:55:27,196 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:27,196 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 02:55:27,196 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 02:55:27,197 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 02:55:27,197 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2021-11-23 02:55:27,197 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-23 02:55:27,197 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 02:55:27,198 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 02:55:27,198 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 02:55:27,198 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_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d82f1b23bea4834b28dfbe602ddf1f3e06a3ee60a847e3002a9403f092f2c830 [2021-11-23 02:55:27,538 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 02:55:27,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 02:55:27,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 02:55:27,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 02:55:27,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 02:55:27,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i [2021-11-23 02:55:27,689 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/1eadd0eb7/9b4218230951460e9fc5aba8efcc09e1/FLAG290aedb27 [2021-11-23 02:55:28,340 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 02:55:28,341 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i [2021-11-23 02:55:28,363 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/1eadd0eb7/9b4218230951460e9fc5aba8efcc09e1/FLAG290aedb27 [2021-11-23 02:55:28,590 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/1eadd0eb7/9b4218230951460e9fc5aba8efcc09e1 [2021-11-23 02:55:28,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 02:55:28,598 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 02:55:28,601 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:28,601 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 02:55:28,605 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 02:55:28,606 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:28" (1/1) ... [2021-11-23 02:55:28,608 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ac358e9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:28, skipping insertion in model container [2021-11-23 02:55:28,609 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 02:55:28" (1/1) ... [2021-11-23 02:55:28,618 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 02:55:28,697 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 02:55:29,222 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25842,25855] [2021-11-23 02:55:29,239 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25967,25980] [2021-11-23 02:55:29,243 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[26082,26095] [2021-11-23 02:55:29,250 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:29,269 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 02:55:29,361 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25842,25855] [2021-11-23 02:55:29,364 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25967,25980] [2021-11-23 02:55:29,366 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[26082,26095] [2021-11-23 02:55:29,370 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 02:55:29,418 INFO L208 MainTranslator]: Completed translation [2021-11-23 02:55:29,419 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29 WrapperNode [2021-11-23 02:55:29,419 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 02:55:29,420 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:29,421 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 02:55:29,421 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 02:55:29,430 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,448 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,480 INFO L137 Inliner]: procedures = 139, calls = 57, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 129 [2021-11-23 02:55:29,480 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 02:55:29,481 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 02:55:29,482 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 02:55:29,482 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 02:55:29,492 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,492 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,510 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,515 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,517 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,522 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 02:55:29,523 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 02:55:29,523 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 02:55:29,523 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 02:55:29,524 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (1/1) ... [2021-11-23 02:55:29,533 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 02:55:29,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:29,577 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 02:55:29,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 02:55:29,637 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-23 02:55:29,638 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-23 02:55:29,638 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 02:55:29,638 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 02:55:29,638 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 02:55:29,639 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 02:55:29,639 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 02:55:29,639 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 02:55:29,639 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 02:55:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2021-11-23 02:55:29,640 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2021-11-23 02:55:29,640 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 02:55:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 02:55:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 02:55:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-23 02:55:29,641 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2021-11-23 02:55:29,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2021-11-23 02:55:29,642 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 02:55:29,642 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 02:55:29,802 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 02:55:29,804 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 02:55:30,160 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 02:55:30,241 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 02:55:30,241 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 02:55:30,243 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:30 BoogieIcfgContainer [2021-11-23 02:55:30,244 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 02:55:30,246 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 02:55:30,246 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 02:55:30,250 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 02:55:30,250 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 02:55:28" (1/3) ... [2021-11-23 02:55:30,251 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a972f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:30, skipping insertion in model container [2021-11-23 02:55:30,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 02:55:29" (2/3) ... [2021-11-23 02:55:30,252 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a972f1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 02:55:30, skipping insertion in model container [2021-11-23 02:55:30,252 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 02:55:30" (3/3) ... [2021-11-23 02:55:30,254 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex_double_unlock.i [2021-11-23 02:55:30,261 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 02:55:30,261 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 02:55:30,319 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 02:55:30,328 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 [2021-11-23 02:55:30,328 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 02:55:30,373 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) [2021-11-23 02:55:30,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-23 02:55:30,380 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:30,381 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:30,382 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:30,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:30,389 INFO L85 PathProgramCache]: Analyzing trace with hash -2142385474, now seen corresponding path program 1 times [2021-11-23 02:55:30,401 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:30,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393027637] [2021-11-23 02:55:30,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:30,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:30,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:30,716 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:55:30,717 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:30,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393027637] [2021-11-23 02:55:30,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393027637] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:30,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:30,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 02:55:30,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4373817] [2021-11-23 02:55:30,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:30,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 02:55:30,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:30,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 02:55:30,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 02:55:30,766 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) [2021-11-23 02:55:30,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:30,890 INFO L93 Difference]: Finished difference Result 96 states and 124 transitions. [2021-11-23 02:55:30,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 02:55:30,893 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 [2021-11-23 02:55:30,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:30,905 INFO L225 Difference]: With dead ends: 96 [2021-11-23 02:55:30,905 INFO L226 Difference]: Without dead ends: 51 [2021-11-23 02:55:30,909 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 [2021-11-23 02:55:30,919 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 [2021-11-23 02:55:30,920 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] [2021-11-23 02:55:30,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-11-23 02:55:30,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-11-23 02:55:30,970 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) [2021-11-23 02:55:30,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2021-11-23 02:55:30,975 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 19 [2021-11-23 02:55:30,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:30,976 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2021-11-23 02:55:30,977 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) [2021-11-23 02:55:30,977 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2021-11-23 02:55:30,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-23 02:55:30,979 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:30,980 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 02:55:30,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-23 02:55:30,980 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:30,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:30,982 INFO L85 PathProgramCache]: Analyzing trace with hash -1125308492, now seen corresponding path program 1 times [2021-11-23 02:55:30,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:30,983 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014663203] [2021-11-23 02:55:30,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:30,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:31,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:55:31,323 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:31,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014663203] [2021-11-23 02:55:31,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014663203] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 02:55:31,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 02:55:31,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-11-23 02:55:31,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984213788] [2021-11-23 02:55:31,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 02:55:31,327 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-23 02:55:31,327 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:55:31,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-23 02:55:31,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-23 02:55:31,329 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) [2021-11-23 02:55:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:55:31,884 INFO L93 Difference]: Finished difference Result 145 states and 192 transitions. [2021-11-23 02:55:31,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-23 02:55:31,885 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 [2021-11-23 02:55:31,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:55:31,888 INFO L225 Difference]: With dead ends: 145 [2021-11-23 02:55:31,889 INFO L226 Difference]: Without dead ends: 100 [2021-11-23 02:55:31,890 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 [2021-11-23 02:55:31,892 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, 0.4s IncrementalHoareTripleChecker+Time [2021-11-23 02:55:31,893 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 152 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 148 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2021-11-23 02:55:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-23 02:55:31,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2021-11-23 02:55:31,930 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) [2021-11-23 02:55:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 106 transitions. [2021-11-23 02:55:31,933 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 106 transitions. Word has length 20 [2021-11-23 02:55:31,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:55:31,934 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 106 transitions. [2021-11-23 02:55:31,934 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) [2021-11-23 02:55:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 106 transitions. [2021-11-23 02:55:31,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-23 02:55:31,937 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:55:31,937 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] [2021-11-23 02:55:31,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-23 02:55:31,938 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:55:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:55:31,955 INFO L85 PathProgramCache]: Analyzing trace with hash -496526016, now seen corresponding path program 1 times [2021-11-23 02:55:31,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:55:31,956 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116915242] [2021-11-23 02:55:31,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:31,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:55:32,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:35,637 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-23 02:55:35,637 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:55:35,637 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116915242] [2021-11-23 02:55:35,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116915242] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:55:35,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824603174] [2021-11-23 02:55:35,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:55:35,639 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:55:35,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:55:35,642 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:55:35,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-23 02:55:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:55:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 373 conjuncts, 133 conjunts are in the unsatisfiable core [2021-11-23 02:55:35,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:55:36,246 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:55:36,251 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 [2021-11-23 02:55:36,596 INFO L354 Elim1Store]: treesize reduction 36, result has 34.5 percent of original size [2021-11-23 02:55:36,597 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 [2021-11-23 02:55:36,883 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 [2021-11-23 02:55:36,907 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 [2021-11-23 02:56:22,310 INFO L354 Elim1Store]: treesize reduction 263, result has 20.8 percent of original size [2021-11-23 02:56:22,311 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 [2021-11-23 02:56:22,513 INFO L354 Elim1Store]: treesize reduction 428, result has 24.6 percent of original size [2021-11-23 02:56:22,514 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 [2021-11-23 02:56:22,564 INFO L354 Elim1Store]: treesize reduction 28, result has 47.2 percent of original size [2021-11-23 02:56:22,565 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 [2021-11-23 02:56:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:56:59,642 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:57:02,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824603174] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:57:02,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1267135593] [2021-11-23 02:57:02,484 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-23 02:57:02,492 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:57:02,497 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:57:02,508 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:57:02,510 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:57:02,581 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 [2021-11-23 02:57:02,589 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 [2021-11-23 02:57:02,805 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 [2021-11-23 02:57:02,816 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 [2021-11-23 02:57:02,833 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:02,835 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:02,939 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 [2021-11-23 02:57:02,952 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 [2021-11-23 02:57:02,967 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:02,971 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:03,244 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 [2021-11-23 02:57:03,261 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 [2021-11-23 02:57:03,272 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 [2021-11-23 02:57:03,330 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 02:57:03,331 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 [2021-11-23 02:57:03,363 INFO L354 Elim1Store]: treesize reduction 33, result has 34.0 percent of original size [2021-11-23 02:57:03,363 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 [2021-11-23 02:57:03,391 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 02:57:03,391 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 [2021-11-23 02:57:03,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:03,489 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 02:57:03,490 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 [2021-11-23 02:57:03,513 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:03,646 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 02:57:03,647 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 [2021-11-23 02:57:03,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:03,713 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 [2021-11-23 02:57:03,747 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:03,747 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 [2021-11-23 02:57:03,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:03,787 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 [2021-11-23 02:57:03,808 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:03,809 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 [2021-11-23 02:57:03,871 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 [2021-11-23 02:57:03,879 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 [2021-11-23 02:57:03,891 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:03,892 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 [2021-11-23 02:57:03,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:03,902 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 [2021-11-23 02:57:03,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:03,915 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:04,053 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:04,054 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 [2021-11-23 02:57:04,065 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:57:04,066 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 [2021-11-23 02:57:04,074 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 [2021-11-23 02:57:04,082 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 [2021-11-23 02:57:04,092 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:04,096 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:04,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:57:04,327 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 15 for LOIs [2021-11-23 02:57:04,544 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 [2021-11-23 02:57:04,560 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 [2021-11-23 02:57:04,578 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 [2021-11-23 02:57:04,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:57:04,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:04,655 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 15 [2021-11-23 02:57:04,671 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:57:04,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:04,684 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 15 [2021-11-23 02:57:04,750 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:57:04,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:04,758 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 15 [2021-11-23 02:57:04,774 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:57:04,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:57:04,789 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 15 [2021-11-23 02:57:05,011 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 59 for LOIs [2021-11-23 02:57:05,058 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-23 02:57:05,084 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 [2021-11-23 02:57:05,091 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 [2021-11-23 02:57:05,099 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 23 for LOIs [2021-11-23 02:57:05,140 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:57:58,006 WARN L227 SmtUtils]: Spent 5.01s on a formula simplification. DAG size of input: 109 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 02:58:10,538 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '817#(and (= |mutex_lock_#in~m#1.base| |mutex_lock_~m#1.base|) (= |~#mutexes~0.base| 3) (<= |mutex_lock_~m#1.offset| 0) (<= 0 |mutex_lock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#NULL.offset| 0) (= |mutex_lock_#in~m#1.offset| |mutex_lock_~m#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:58:10,538 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:58:10,538 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:58:10,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26] total 53 [2021-11-23 02:58:10,539 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798669998] [2021-11-23 02:58:10,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:58:10,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-23 02:58:10,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:58:10,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-23 02:58:10,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=6391, Unknown=50, NotChecked=0, Total=6806 [2021-11-23 02:58:10,545 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) [2021-11-23 02:58:56,953 WARN L227 SmtUtils]: Spent 5.78s 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) [2021-11-23 02:59:28,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 02:59:28,363 INFO L93 Difference]: Finished difference Result 186 states and 229 transitions. [2021-11-23 02:59:28,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-23 02:59:28,364 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 [2021-11-23 02:59:28,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 02:59:28,369 INFO L225 Difference]: With dead ends: 186 [2021-11-23 02:59:28,369 INFO L226 Difference]: Without dead ends: 144 [2021-11-23 02:59:28,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 59 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3894 ImplicationChecksByTransitivity, 202.7s TimeCoverageRelationStatistics Valid=800, Invalid=12692, Unknown=80, NotChecked=0, Total=13572 [2021-11-23 02:59:28,377 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 241 mSDsluCounter, 902 mSDsCounter, 0 mSdLazyCounter, 1515 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s 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, 2.5s IncrementalHoareTripleChecker+Time [2021-11-23 02:59:28,377 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [245 Valid, 822 Invalid, 2435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 1515 Invalid, 0 Unknown, 683 Unchecked, 2.5s Time] [2021-11-23 02:59:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-23 02:59:28,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2021-11-23 02:59:28,408 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) [2021-11-23 02:59:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2021-11-23 02:59:28,411 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 47 [2021-11-23 02:59:28,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 02:59:28,414 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2021-11-23 02:59:28,415 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) [2021-11-23 02:59:28,415 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2021-11-23 02:59:28,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-23 02:59:28,416 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 02:59:28,417 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] [2021-11-23 02:59:28,444 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-23 02:59:28,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-11-23 02:59:28,618 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 02:59:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 02:59:28,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1682239030, now seen corresponding path program 1 times [2021-11-23 02:59:28,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 02:59:28,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665074732] [2021-11-23 02:59:28,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:28,619 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 02:59:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:30,124 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 02:59:30,124 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 02:59:30,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665074732] [2021-11-23 02:59:30,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665074732] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:59:30,125 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834893025] [2021-11-23 02:59:30,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 02:59:30,125 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 02:59:30,126 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 02:59:30,134 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 02:59:30,139 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-23 02:59:30,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 02:59:30,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 149 conjunts are in the unsatisfiable core [2021-11-23 02:59:30,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 02:59:30,524 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 02:59:30,524 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 [2021-11-23 02:59:30,872 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 02:59:30,873 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 [2021-11-23 02:59:31,837 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 [2021-11-23 02:59:31,859 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 [2021-11-23 02:59:35,044 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 [2021-11-23 02:59:35,132 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:35,289 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 02:59:35,290 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 49 [2021-11-23 02:59:36,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:36,578 INFO L354 Elim1Store]: treesize reduction 1076, result has 18.9 percent of original size [2021-11-23 02:59:36,579 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 [2021-11-23 02:59:36,589 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:36,592 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 [2021-11-23 02:59:36,918 INFO L354 Elim1Store]: treesize reduction 114, result has 2.6 percent of original size [2021-11-23 02:59:36,919 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 [2021-11-23 02:59:37,093 INFO L354 Elim1Store]: treesize reduction 49, result has 29.0 percent of original size [2021-11-23 02:59:37,094 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 [2021-11-23 02:59:37,273 INFO L354 Elim1Store]: treesize reduction 36, result has 41.0 percent of original size [2021-11-23 02:59:37,274 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 [2021-11-23 02:59:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 02:59:38,357 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 02:59:41,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834893025] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 02:59:41,385 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2053300141] [2021-11-23 02:59:41,389 INFO L159 IcfgInterpreter]: Started Sifa with 32 locations of interest [2021-11-23 02:59:41,389 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 02:59:41,390 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 02:59:41,390 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 02:59:41,390 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 02:59:41,427 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 [2021-11-23 02:59:41,435 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 [2021-11-23 02:59:41,584 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 [2021-11-23 02:59:41,593 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 [2021-11-23 02:59:41,604 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:41,606 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:41,712 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 [2021-11-23 02:59:41,721 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 [2021-11-23 02:59:41,731 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:41,733 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:42,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:59:42,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 02:59:42,044 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 15 treesize of output 1 [2021-11-23 02:59:42,100 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,162 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 02:59:42,162 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 [2021-11-23 02:59:42,203 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 02:59:42,204 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 [2021-11-23 02:59:42,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,386 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 02:59:42,387 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 [2021-11-23 02:59:42,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,530 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 02:59:42,530 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 [2021-11-23 02:59:42,589 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:42,590 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 02:59:42,640 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:42,641 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 02:59:42,705 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:42,705 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 02:59:42,731 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:42,731 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 02:59:42,800 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 [2021-11-23 02:59:42,808 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 [2021-11-23 02:59:42,817 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,820 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 [2021-11-23 02:59:42,829 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,830 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 [2021-11-23 02:59:42,840 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:42,844 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:42,979 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 [2021-11-23 02:59:42,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:42,987 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 [2021-11-23 02:59:42,995 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 [2021-11-23 02:59:43,006 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 02:59:43,007 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 [2021-11-23 02:59:43,018 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:43,021 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 02:59:43,194 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 15 for LOIs [2021-11-23 02:59:43,414 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 [2021-11-23 02:59:43,432 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 [2021-11-23 02:59:43,442 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 [2021-11-23 02:59:43,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:43,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:43,525 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 15 [2021-11-23 02:59:43,543 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:43,552 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:43,553 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 15 [2021-11-23 02:59:43,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:43,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:43,651 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 15 [2021-11-23 02:59:43,668 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 02:59:43,677 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 02:59:43,678 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 15 [2021-11-23 02:59:43,858 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 59 for LOIs [2021-11-23 02:59:43,910 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 31 for LOIs [2021-11-23 02:59:43,926 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 [2021-11-23 02:59:43,947 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 [2021-11-23 02:59:43,949 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 23 for LOIs [2021-11-23 02:59:44,067 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 02:59:56,974 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '1567#(and (= |mutex_lock_#in~m#1.base| |mutex_lock_~m#1.base|) (= |~#mutexes~0.base| 3) (<= |mutex_lock_~m#1.offset| 0) (<= 0 |mutex_lock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#NULL.offset| 0) (= |mutex_lock_#in~m#1.offset| |mutex_lock_~m#1.offset|) (<= 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 02:59:56,975 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 02:59:56,975 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 02:59:56,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-11-23 02:59:56,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536590633] [2021-11-23 02:59:56,975 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 02:59:56,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-23 02:59:56,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 02:59:56,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-23 02:59:56,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=5788, Unknown=0, NotChecked=0, Total=6162 [2021-11-23 02:59:56,979 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) [2021-11-23 03:00:10,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:10,206 INFO L93 Difference]: Finished difference Result 365 states and 461 transitions. [2021-11-23 03:00:10,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-23 03:00:10,207 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 [2021-11-23 03:00:10,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:10,213 INFO L225 Difference]: With dead ends: 365 [2021-11-23 03:00:10,213 INFO L226 Difference]: Without dead ends: 292 [2021-11-23 03:00:10,222 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6532 ImplicationChecksByTransitivity, 29.7s TimeCoverageRelationStatistics Valid=1354, Invalid=18386, Unknown=0, NotChecked=0, Total=19740 [2021-11-23 03:00:10,223 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 330 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 1887 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s 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, 2.7s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:10,224 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [334 Valid, 846 Invalid, 3271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 1887 Invalid, 0 Unknown, 1225 Unchecked, 2.7s Time] [2021-11-23 03:00:10,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-11-23 03:00:10,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 209. [2021-11-23 03:00:10,271 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) [2021-11-23 03:00:10,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 258 transitions. [2021-11-23 03:00:10,275 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 258 transitions. Word has length 49 [2021-11-23 03:00:10,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:10,276 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 258 transitions. [2021-11-23 03:00:10,276 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) [2021-11-23 03:00:10,276 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 258 transitions. [2021-11-23 03:00:10,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-11-23 03:00:10,280 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:10,280 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] [2021-11-23 03:00:10,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:00:10,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:10,491 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:00:10,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:10,491 INFO L85 PathProgramCache]: Analyzing trace with hash 925587194, now seen corresponding path program 1 times [2021-11-23 03:00:10,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:10,492 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150837029] [2021-11-23 03:00:10,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:10,492 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:10,568 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2021-11-23 03:00:10,568 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150837029] [2021-11-23 03:00:10,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150837029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:00:10,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159457374] [2021-11-23 03:00:10,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:10,570 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:10,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:00:10,571 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:00:10,599 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-23 03:00:10,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:10,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-23 03:00:10,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:00:10,832 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 03:00:10,833 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:00:10,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159457374] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:10,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:00:10,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-23 03:00:10,833 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958698511] [2021-11-23 03:00:10,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:10,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:00:10,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:10,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:00:10,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:00:10,835 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) [2021-11-23 03:00:10,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:10,930 INFO L93 Difference]: Finished difference Result 331 states and 414 transitions. [2021-11-23 03:00:10,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:00:10,931 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 [2021-11-23 03:00:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:10,935 INFO L225 Difference]: With dead ends: 331 [2021-11-23 03:00:10,935 INFO L226 Difference]: Without dead ends: 231 [2021-11-23 03:00:10,937 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 [2021-11-23 03:00:10,941 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 [2021-11-23 03:00:10,941 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] [2021-11-23 03:00:10,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2021-11-23 03:00:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 223. [2021-11-23 03:00:10,981 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) [2021-11-23 03:00:10,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 271 transitions. [2021-11-23 03:00:10,985 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 271 transitions. Word has length 57 [2021-11-23 03:00:10,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:10,986 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 271 transitions. [2021-11-23 03:00:10,986 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) [2021-11-23 03:00:10,986 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 271 transitions. [2021-11-23 03:00:10,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-23 03:00:10,991 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:10,991 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] [2021-11-23 03:00:11,034 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:00:11,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:11,219 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:00:11,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:11,219 INFO L85 PathProgramCache]: Analyzing trace with hash 434706162, now seen corresponding path program 1 times [2021-11-23 03:00:11,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:11,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883809773] [2021-11-23 03:00:11,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:11,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:11,603 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 21 proven. 9 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2021-11-23 03:00:11,604 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883809773] [2021-11-23 03:00:11,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883809773] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:00:11,604 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758084622] [2021-11-23 03:00:11,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:11,604 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:11,605 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:00:11,605 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:00:11,607 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-23 03:00:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:11,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-23 03:00:11,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:00:11,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:11,982 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 [2021-11-23 03:00:12,001 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 [2021-11-23 03:00:12,511 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-23 03:00:12,512 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2021-11-23 03:00:12,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758084622] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:00:12,512 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:00:12,512 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-11-23 03:00:12,512 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960209719] [2021-11-23 03:00:12,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:00:12,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:00:12,513 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:12,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:00:12,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-11-23 03:00:12,514 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) [2021-11-23 03:00:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:00:13,404 INFO L93 Difference]: Finished difference Result 312 states and 380 transitions. [2021-11-23 03:00:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:00:13,406 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 [2021-11-23 03:00:13,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:00:13,408 INFO L225 Difference]: With dead ends: 312 [2021-11-23 03:00:13,408 INFO L226 Difference]: Without dead ends: 159 [2021-11-23 03:00:13,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-11-23 03:00:13,411 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 127 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s 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, 0.5s IncrementalHoareTripleChecker+Time [2021-11-23 03:00:13,411 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 145 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2021-11-23 03:00:13,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2021-11-23 03:00:13,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 119. [2021-11-23 03:00:13,431 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) [2021-11-23 03:00:13,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 137 transitions. [2021-11-23 03:00:13,433 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 137 transitions. Word has length 59 [2021-11-23 03:00:13,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:00:13,434 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 137 transitions. [2021-11-23 03:00:13,434 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) [2021-11-23 03:00:13,434 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 137 transitions. [2021-11-23 03:00:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-23 03:00:13,437 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:00:13,437 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] [2021-11-23 03:00:13,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:00:13,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:13,651 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:00:13,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:00:13,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1002116726, now seen corresponding path program 1 times [2021-11-23 03:00:13,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:00:13,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506891335] [2021-11-23 03:00:13,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:13,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:00:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:13,987 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 03:00:13,987 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:00:13,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506891335] [2021-11-23 03:00:13,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506891335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:00:13,987 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975376905] [2021-11-23 03:00:13,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:00:13,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:00:13,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:00:13,988 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:00:13,990 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-23 03:00:14,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:00:14,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-23 03:00:14,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:00:14,244 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:00:14,244 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 [2021-11-23 03:00:14,425 INFO L354 Elim1Store]: treesize reduction 44, result has 30.2 percent of original size [2021-11-23 03:00:14,425 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 [2021-11-23 03:00:15,146 INFO L354 Elim1Store]: treesize reduction 185, result has 18.5 percent of original size [2021-11-23 03:00:15,147 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 [2021-11-23 03:00:15,711 INFO L354 Elim1Store]: treesize reduction 36, result has 26.5 percent of original size [2021-11-23 03:00:15,711 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 [2021-11-23 03:00:18,191 INFO L354 Elim1Store]: treesize reduction 54, result has 33.3 percent of original size [2021-11-23 03:00:18,191 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 [2021-11-23 03:00:23,447 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 31 proven. 16 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-23 03:00:23,447 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:00:24,221 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 [2021-11-23 03:00:25,334 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 [2021-11-23 03:00:25,662 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 [2021-11-23 03:00:25,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:25,813 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:25,815 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:26,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975376905] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:00:26,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [278252624] [2021-11-23 03:00:26,261 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 03:00:26,262 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:00:26,262 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:00:26,263 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:00:26,263 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:00:26,291 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 [2021-11-23 03:00:26,299 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 [2021-11-23 03:00:26,469 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 [2021-11-23 03:00:26,483 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 [2021-11-23 03:00:26,494 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:26,501 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:26,617 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 [2021-11-23 03:00:26,628 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 [2021-11-23 03:00:26,637 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:26,641 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:26,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:00:26,873 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 15 treesize of output 1 [2021-11-23 03:00:26,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:00:26,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:27,096 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 03:00:27,096 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 [2021-11-23 03:00:27,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:27,210 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 03:00:27,212 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 [2021-11-23 03:00:27,272 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:00:27,273 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 [2021-11-23 03:00:27,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:27,513 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:00:27,514 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 [2021-11-23 03:00:27,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:27,595 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:00:27,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:27,656 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:00:27,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:27,739 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:00:27,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:27,772 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:00:27,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:27,840 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 [2021-11-23 03:00:27,848 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 [2021-11-23 03:00:27,858 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 [2021-11-23 03:00:27,868 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:27,869 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 [2021-11-23 03:00:27,883 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:27,885 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:27,887 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:28,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:28,035 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 [2021-11-23 03:00:28,052 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 [2021-11-23 03:00:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:00:28,068 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 [2021-11-23 03:00:28,079 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 [2021-11-23 03:00:28,091 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:28,094 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:28,098 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:00:28,504 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 15 for LOIs [2021-11-23 03:00:28,713 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 15 treesize of output 1 [2021-11-23 03:00:28,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:00:28,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:00:28,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:28,971 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:28,971 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:00:28,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:29,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:29,003 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:00:29,258 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:29,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:29,279 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:00:29,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:00:29,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:00:29,327 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 15 [2021-11-23 03:00:29,636 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 81 for LOIs [2021-11-23 03:00:29,708 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 30 for LOIs [2021-11-23 03:00:29,725 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 [2021-11-23 03:00:29,740 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 [2021-11-23 03:00:29,741 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 57 for LOIs [2021-11-23 03:00:29,887 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 54 for LOIs [2021-11-23 03:00:30,103 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:00:47,632 WARN L227 SmtUtils]: Spent 5.30s on a formula simplification. DAG size of input: 131 DAG size of output: 110 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:00:53,251 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '4610#(and (= |mutex_unlock_#in~m#1.base| |mutex_unlock_~m#1.base|) (< |mutex_unlock_#in~m#1.base| |#StackHeapBarrier|) (= |~#mutexes~0.base| 3) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (<= 0 |mutex_unlock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= |mutex_unlock_~m#1.offset| 0) (= |#NULL.offset| 0) (= |mutex_unlock_#in~m#1.offset| 0) (= |old(#valid)| |#valid|) (not (= (ite (or (not (= |mutex_unlock_#in~m#1.offset| 0)) (not (= |mutex_unlock_#in~m#1.base| 0))) 1 0) 0)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:00:53,251 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:00:53,251 INFO L186 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2021-11-23 03:00:53,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 35 [2021-11-23 03:00:53,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500948030] [2021-11-23 03:00:53,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2021-11-23 03:00:53,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-23 03:00:53,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:00:53,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-23 03:00:53,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=4901, Unknown=3, NotChecked=0, Total=5256 [2021-11-23 03:00:53,256 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) [2021-11-23 03:01:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:01:21,618 INFO L93 Difference]: Finished difference Result 207 states and 246 transitions. [2021-11-23 03:01:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-23 03:01:21,619 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 [2021-11-23 03:01:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:01:21,621 INFO L225 Difference]: With dead ends: 207 [2021-11-23 03:01:21,621 INFO L226 Difference]: Without dead ends: 152 [2021-11-23 03:01:21,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 114 SyntacticMatches, 4 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3233 ImplicationChecksByTransitivity, 58.1s TimeCoverageRelationStatistics Valid=879, Invalid=10890, Unknown=3, NotChecked=0, Total=11772 [2021-11-23 03:01:21,628 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 191 mSDsluCounter, 544 mSDsCounter, 0 mSdLazyCounter, 854 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s 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 [2021-11-23 03:01:21,629 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] [2021-11-23 03:01:21,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-23 03:01:21,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 121. [2021-11-23 03:01:21,648 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) [2021-11-23 03:01:21,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 137 transitions. [2021-11-23 03:01:21,649 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 137 transitions. Word has length 66 [2021-11-23 03:01:21,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:01:21,650 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 137 transitions. [2021-11-23 03:01:21,651 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) [2021-11-23 03:01:21,651 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 137 transitions. [2021-11-23 03:01:21,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-23 03:01:21,654 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:01:21,654 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] [2021-11-23 03:01:21,678 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:01:21,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:01:21,863 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:01:21,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:01:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -607545132, now seen corresponding path program 1 times [2021-11-23 03:01:21,863 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:01:21,863 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567488005] [2021-11-23 03:01:21,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:01:21,864 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:01:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:01:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 20 proven. 5 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-23 03:01:22,567 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:01:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567488005] [2021-11-23 03:01:22,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567488005] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:01:22,567 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551258778] [2021-11-23 03:01:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:01:22,567 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:01:22,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:01:22,568 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:01:22,569 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-23 03:01:22,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:01:22,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 499 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-23 03:01:22,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:01:23,907 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-23 03:01:23,907 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 [2021-11-23 03:01:24,184 INFO L354 Elim1Store]: treesize reduction 245, result has 19.1 percent of original size [2021-11-23 03:01:24,184 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 [2021-11-23 03:01:40,597 INFO L354 Elim1Store]: treesize reduction 22, result has 75.8 percent of original size [2021-11-23 03:01:40,598 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 [2021-11-23 03:01:40,747 INFO L354 Elim1Store]: treesize reduction 52, result has 35.8 percent of original size [2021-11-23 03:01:40,747 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 208 treesize of output 171 [2021-11-23 03:02:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 36 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-23 03:02:09,707 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:02:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-23 03:02:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551258778] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:02:12,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1402517585] [2021-11-23 03:02:12,555 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 03:02:12,555 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:02:12,555 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:02:12,555 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:02:12,556 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:02:12,588 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 [2021-11-23 03:02:12,598 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 [2021-11-23 03:02:12,760 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 [2021-11-23 03:02:12,774 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 [2021-11-23 03:02:12,787 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:02:12,789 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:02:12,883 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 [2021-11-23 03:02:12,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 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 [2021-11-23 03:02:12,910 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:02:12,912 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:02:13,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:02:13,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-11-23 03:02:13,210 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 15 treesize of output 1 [2021-11-23 03:02:13,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:13,656 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:02:13,657 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 [2021-11-23 03:02:13,694 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:13,864 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 03:02:13,864 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 [2021-11-23 03:02:13,968 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:02:13,969 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 [2021-11-23 03:02:14,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:14,288 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 03:02:14,288 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 [2021-11-23 03:02:14,367 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:14,367 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:02:14,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:14,432 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:02:14,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:14,516 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:02:14,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:14,569 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:02:14,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:14,636 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 [2021-11-23 03:02:14,655 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 [2021-11-23 03:02:14,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:14,670 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 [2021-11-23 03:02:14,683 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 [2021-11-23 03:02:14,743 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:14,744 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 [2021-11-23 03:02:14,763 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 [2021-11-23 03:02:14,775 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 [2021-11-23 03:02:14,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:02:14,792 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 [2021-11-23 03:02:14,973 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 98 for LOIs [2021-11-23 03:02:15,395 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 [2021-11-23 03:02:15,419 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 [2021-11-23 03:02:15,443 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 [2021-11-23 03:02:15,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:02:15,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:15,525 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 15 [2021-11-23 03:02:15,549 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:02:15,570 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:15,570 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 15 [2021-11-23 03:02:15,631 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:02:15,652 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:15,652 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 15 [2021-11-23 03:02:15,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:02:15,700 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:02:15,700 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 15 [2021-11-23 03:02:15,865 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 60 for LOIs [2021-11-23 03:02:15,921 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 31 for LOIs [2021-11-23 03:02:15,943 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 [2021-11-23 03:02:15,956 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 [2021-11-23 03:02:15,965 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 44 for LOIs [2021-11-23 03:02:16,121 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 34 for LOIs [2021-11-23 03:02:16,242 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:02:35,652 WARN L227 SmtUtils]: Spent 5.27s on a formula simplification. DAG size of input: 110 DAG size of output: 104 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:02:40,681 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '5601#(and (= |mutex_unlock_#in~m#1.base| |mutex_unlock_~m#1.base|) (< |mutex_unlock_#in~m#1.base| |#StackHeapBarrier|) (= |~#mutexes~0.base| 3) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (<= 0 |mutex_unlock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= |mutex_unlock_~m#1.offset| 0) (= |#NULL.offset| 0) (= |mutex_unlock_#in~m#1.offset| 0) (= |old(#valid)| |#valid|) (not (= (ite (not (= |mutex_unlock_#in~m#1.base| 0)) 1 0) 0)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:02:40,681 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:02:40,681 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:02:40,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 7] total 31 [2021-11-23 03:02:40,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106342016] [2021-11-23 03:02:40,682 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:02:40,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-23 03:02:40,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:02:40,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-23 03:02:40,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=2983, Unknown=1, NotChecked=0, Total=3306 [2021-11-23 03:02:40,684 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) [2021-11-23 03:02:59,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:02:59,691 INFO L93 Difference]: Finished difference Result 242 states and 291 transitions. [2021-11-23 03:02:59,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-23 03:02:59,693 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 [2021-11-23 03:02:59,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:02:59,695 INFO L225 Difference]: With dead ends: 242 [2021-11-23 03:02:59,695 INFO L226 Difference]: Without dead ends: 203 [2021-11-23 03:02:59,697 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 159 SyntacticMatches, 8 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2447 ImplicationChecksByTransitivity, 43.5s TimeCoverageRelationStatistics Valid=724, Invalid=7283, Unknown=3, NotChecked=0, Total=8010 [2021-11-23 03:02:59,698 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 215 mSDsluCounter, 641 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 1231 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 232 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:02:59,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 628 Invalid, 1231 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 883 Invalid, 0 Unknown, 232 Unchecked, 3.1s Time] [2021-11-23 03:02:59,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-11-23 03:02:59,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 158. [2021-11-23 03:02:59,725 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) [2021-11-23 03:02:59,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 185 transitions. [2021-11-23 03:02:59,727 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 185 transitions. Word has length 68 [2021-11-23 03:02:59,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:02:59,728 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 185 transitions. [2021-11-23 03:02:59,728 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) [2021-11-23 03:02:59,729 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 185 transitions. [2021-11-23 03:02:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-23 03:02:59,730 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:02:59,731 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] [2021-11-23 03:02:59,758 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-23 03:02:59,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:02:59,943 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:02:59,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:02:59,943 INFO L85 PathProgramCache]: Analyzing trace with hash -787038246, now seen corresponding path program 2 times [2021-11-23 03:02:59,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:02:59,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477814445] [2021-11-23 03:02:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:02:59,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:02:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:00,050 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-23 03:03:00,051 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:00,051 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477814445] [2021-11-23 03:03:00,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477814445] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-23 03:03:00,051 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:03:00,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-23 03:03:00,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047792260] [2021-11-23 03:03:00,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:03:00,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:03:00,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:00,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:03:00,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:03:00,053 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) [2021-11-23 03:03:00,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:03:00,266 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2021-11-23 03:03:00,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:03:00,267 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 [2021-11-23 03:03:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:03:00,269 INFO L225 Difference]: With dead ends: 176 [2021-11-23 03:03:00,269 INFO L226 Difference]: Without dead ends: 174 [2021-11-23 03:03:00,270 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 [2021-11-23 03:03:00,271 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:03:00,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 129 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2021-11-23 03:03:00,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-23 03:03:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2021-11-23 03:03:00,294 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) [2021-11-23 03:03:00,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 202 transitions. [2021-11-23 03:03:00,296 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 202 transitions. Word has length 69 [2021-11-23 03:03:00,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:03:00,297 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 202 transitions. [2021-11-23 03:03:00,297 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) [2021-11-23 03:03:00,298 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 202 transitions. [2021-11-23 03:03:00,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-23 03:03:00,299 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:03:00,299 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] [2021-11-23 03:03:00,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-11-23 03:03:00,300 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:03:00,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:03:00,300 INFO L85 PathProgramCache]: Analyzing trace with hash -1495072738, now seen corresponding path program 3 times [2021-11-23 03:03:00,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:03:00,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103311551] [2021-11-23 03:03:00,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:03:00,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:03:00,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:03:06,060 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 24 proven. 28 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-23 03:03:06,060 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:03:06,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103311551] [2021-11-23 03:03:06,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103311551] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:03:06,061 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989001545] [2021-11-23 03:03:06,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-23 03:03:06,061 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:03:06,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:03:06,062 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:03:06,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-23 03:03:06,192 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-23 03:03:06,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:03:06,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 462 conjuncts, 167 conjunts are in the unsatisfiable core [2021-11-23 03:03:06,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:03:07,691 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-23 03:03:07,692 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 [2021-11-23 03:03:07,981 INFO L354 Elim1Store]: treesize reduction 185, result has 18.5 percent of original size [2021-11-23 03:03:07,982 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 [2021-11-23 03:03:10,484 INFO L354 Elim1Store]: treesize reduction 48, result has 51.5 percent of original size [2021-11-23 03:03:10,485 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 [2021-11-23 03:03:10,732 INFO L354 Elim1Store]: treesize reduction 20, result has 71.0 percent of original size [2021-11-23 03:03:10,732 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 [2021-11-23 03:03:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 49 proven. 5 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:03:12,858 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:03:18,684 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 23 proven. 17 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-23 03:03:18,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989001545] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:03:18,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [385137632] [2021-11-23 03:03:18,687 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 03:03:18,687 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:03:18,688 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:03:18,688 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:03:18,688 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:03:18,719 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 [2021-11-23 03:03:18,733 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 [2021-11-23 03:03:18,866 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 [2021-11-23 03:03:18,882 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 [2021-11-23 03:03:18,923 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 [2021-11-23 03:03:18,939 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 [2021-11-23 03:03:19,149 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 [2021-11-23 03:03:19,170 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 [2021-11-23 03:03:19,185 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 [2021-11-23 03:03:19,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:19,515 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 03:03:19,516 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 [2021-11-23 03:03:19,547 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:19,941 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:03:19,942 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 [2021-11-23 03:03:19,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:20,212 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 03:03:20,212 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 [2021-11-23 03:03:20,362 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:03:20,362 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 [2021-11-23 03:03:20,470 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:20,470 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 [2021-11-23 03:03:20,546 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:20,546 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 [2021-11-23 03:03:20,646 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:20,646 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 [2021-11-23 03:03:20,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:20,722 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 [2021-11-23 03:03:20,767 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 [2021-11-23 03:03:20,788 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:20,789 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 [2021-11-23 03:03:20,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:20,812 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 [2021-11-23 03:03:20,839 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 [2021-11-23 03:03:20,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:20,933 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 [2021-11-23 03:03:20,962 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 [2021-11-23 03:03:20,980 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 [2021-11-23 03:03:21,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:03:21,003 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 [2021-11-23 03:03:21,152 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 93 for LOIs [2021-11-23 03:03:21,640 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 [2021-11-23 03:03:21,660 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 [2021-11-23 03:03:21,683 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 [2021-11-23 03:03:21,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:03:21,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:21,762 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 15 [2021-11-23 03:03:21,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:03:21,819 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:21,820 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 15 [2021-11-23 03:03:21,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:03:21,906 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:21,907 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 15 [2021-11-23 03:03:21,934 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:03:21,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:03:21,956 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 15 [2021-11-23 03:03:22,132 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 58 for LOIs [2021-11-23 03:03:22,186 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 31 for LOIs [2021-11-23 03:03:22,211 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 [2021-11-23 03:03:22,224 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 [2021-11-23 03:03:22,232 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 44 for LOIs [2021-11-23 03:03:22,434 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 34 for LOIs [2021-11-23 03:03:22,610 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:03:42,394 WARN L227 SmtUtils]: Spent 5.38s on a formula simplification. DAG size of input: 108 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:03:48,645 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '7207#(and (= |mutex_unlock_#in~m#1.base| |mutex_unlock_~m#1.base|) (< |mutex_unlock_#in~m#1.base| |#StackHeapBarrier|) (= |~#mutexes~0.base| 3) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (<= 0 |mutex_unlock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= |mutex_unlock_~m#1.offset| 0) (= |#NULL.offset| 0) (= |mutex_unlock_#in~m#1.offset| 0) (= |old(#valid)| |#valid|) (not (= (ite (not (= |mutex_unlock_#in~m#1.base| 0)) 1 0) 0)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:03:48,645 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:03:48,645 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:03:48,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 18, 10] total 50 [2021-11-23 03:03:48,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078303201] [2021-11-23 03:03:48,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:03:48,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-23 03:03:48,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:03:48,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-23 03:03:48,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=5588, Unknown=0, NotChecked=0, Total=5852 [2021-11-23 03:03:48,649 INFO L87 Difference]: Start difference. First operand 174 states and 202 transitions. Second operand has 50 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 40 states have internal predecessors, (97), 18 states have call successors, (31), 6 states have call predecessors, (31), 14 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-11-23 03:04:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:04:29,698 INFO L93 Difference]: Finished difference Result 327 states and 387 transitions. [2021-11-23 03:04:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-23 03:04:29,700 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 40 states have internal predecessors, (97), 18 states have call successors, (31), 6 states have call predecessors, (31), 14 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) Word has length 70 [2021-11-23 03:04:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:04:29,702 INFO L225 Difference]: With dead ends: 327 [2021-11-23 03:04:29,703 INFO L226 Difference]: Without dead ends: 219 [2021-11-23 03:04:29,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 164 SyntacticMatches, 4 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4493 ImplicationChecksByTransitivity, 65.1s TimeCoverageRelationStatistics Valid=1066, Invalid=15704, Unknown=0, NotChecked=0, Total=16770 [2021-11-23 03:04:29,707 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 523 mSDsluCounter, 933 mSDsCounter, 0 mSdLazyCounter, 2675 mSolverCounterSat, 257 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 526 SdHoareTripleChecker+Valid, 850 SdHoareTripleChecker+Invalid, 2932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 257 IncrementalHoareTripleChecker+Valid, 2675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.8s IncrementalHoareTripleChecker+Time [2021-11-23 03:04:29,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [526 Valid, 850 Invalid, 2932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [257 Valid, 2675 Invalid, 0 Unknown, 0 Unchecked, 10.8s Time] [2021-11-23 03:04:29,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2021-11-23 03:04:29,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 139. [2021-11-23 03:04:29,736 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) [2021-11-23 03:04:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 154 transitions. [2021-11-23 03:04:29,737 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 154 transitions. Word has length 70 [2021-11-23 03:04:29,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:04:29,738 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 154 transitions. [2021-11-23 03:04:29,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 37 states have (on average 2.6216216216216215) internal successors, (97), 40 states have internal predecessors, (97), 18 states have call successors, (31), 6 states have call predecessors, (31), 14 states have return successors, (32), 19 states have call predecessors, (32), 17 states have call successors, (32) [2021-11-23 03:04:29,739 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 154 transitions. [2021-11-23 03:04:29,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-23 03:04:29,740 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:04:29,740 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] [2021-11-23 03:04:29,787 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-23 03:04:29,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-23 03:04:29,955 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:04:29,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:04:29,955 INFO L85 PathProgramCache]: Analyzing trace with hash 2026370436, now seen corresponding path program 1 times [2021-11-23 03:04:29,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:04:29,955 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786248178] [2021-11-23 03:04:29,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:29,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:04:29,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:04:30,962 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:04:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786248178] [2021-11-23 03:04:30,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786248178] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:04:30,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290340344] [2021-11-23 03:04:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:04:30,963 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:04:30,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:04:30,967 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:04:30,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-23 03:04:31,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:04:31,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 589 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-23 03:04:31,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:04:32,794 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-23 03:04:32,794 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 81 treesize of output 71 [2021-11-23 03:04:34,216 INFO L354 Elim1Store]: treesize reduction 44, result has 36.2 percent of original size [2021-11-23 03:04:34,216 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 75 treesize of output 56 [2021-11-23 03:04:35,130 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 [2021-11-23 03:04:35,266 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 [2021-11-23 03:04:35,366 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 [2021-11-23 03:04:35,522 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 33 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:04:35,522 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:04:36,529 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 [2021-11-23 03:04:38,438 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 1405 treesize of output 1389 [2021-11-23 03:04:40,927 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:40,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:41,795 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 13 proven. 18 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-23 03:04:41,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [290340344] provided 0 perfect and 2 imperfect interpolant sequences [2021-11-23 03:04:41,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1157114432] [2021-11-23 03:04:41,799 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 03:04:41,799 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:04:41,800 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:04:41,800 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:04:41,800 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:04:41,849 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 [2021-11-23 03:04:41,863 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 [2021-11-23 03:04:42,011 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 [2021-11-23 03:04:42,031 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 [2021-11-23 03:04:42,082 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 [2021-11-23 03:04:42,105 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 [2021-11-23 03:04:42,410 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 [2021-11-23 03:04:42,445 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 [2021-11-23 03:04:42,466 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 [2021-11-23 03:04:42,530 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:42,734 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 03:04:42,735 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 [2021-11-23 03:04:42,878 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:04:42,879 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 [2021-11-23 03:04:42,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:43,311 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 03:04:43,312 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 [2021-11-23 03:04:43,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:43,796 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:04:43,797 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 [2021-11-23 03:04:43,873 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:43,874 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 [2021-11-23 03:04:43,927 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:43,928 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 [2021-11-23 03:04:44,001 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:44,001 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 [2021-11-23 03:04:44,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:44,058 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 [2021-11-23 03:04:44,139 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:44,139 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 [2021-11-23 03:04:44,153 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 [2021-11-23 03:04:44,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:44,173 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 [2021-11-23 03:04:44,186 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 [2021-11-23 03:04:44,203 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,205 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,210 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,338 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:44,339 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 0 case distinctions, treesize of input 17 treesize of output 7 [2021-11-23 03:04:44,353 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 [2021-11-23 03:04:44,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:04:44,369 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 [2021-11-23 03:04:44,382 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 [2021-11-23 03:04:44,400 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,417 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,420 WARN L234 Elim1Store]: Array PQE input equivalent to false [2021-11-23 03:04:44,818 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 15 for LOIs [2021-11-23 03:04:45,025 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 [2021-11-23 03:04:45,049 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 [2021-11-23 03:04:45,072 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 [2021-11-23 03:04:45,137 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:04:45,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:45,159 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 15 [2021-11-23 03:04:45,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:04:45,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:45,218 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 15 [2021-11-23 03:04:45,281 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:04:45,302 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:45,303 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 15 [2021-11-23 03:04:45,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:04:45,346 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:04:45,346 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 15 [2021-11-23 03:04:45,474 INFO L197 IcfgInterpreter]: Interpreting procedure __ldv_list_add with input of size 59 for LOIs [2021-11-23 03:04:45,565 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_successful_malloc with input of size 31 for LOIs [2021-11-23 03:04:45,607 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 [2021-11-23 03:04:45,624 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 [2021-11-23 03:04:45,628 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_unlock with input of size 55 for LOIs [2021-11-23 03:04:45,801 INFO L197 IcfgInterpreter]: Interpreting procedure ldv_is_in_set with input of size 54 for LOIs [2021-11-23 03:04:45,999 INFO L180 IcfgInterpreter]: Interpretation finished [2021-11-23 03:05:01,893 WARN L227 SmtUtils]: Spent 5.26s on a formula simplification. DAG size of input: 109 DAG size of output: 103 (called from [L 360] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2021-11-23 03:05:08,307 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '8452#(and (= |mutex_unlock_#in~m#1.base| |mutex_unlock_~m#1.base|) (< |mutex_unlock_#in~m#1.base| |#StackHeapBarrier|) (= |~#mutexes~0.base| 3) (= |#memory_int| |old(#memory_int)|) (= |#memory_$Pointer$.base| |old(#memory_$Pointer$.base)|) (<= 0 |mutex_unlock_~m#1.offset|) (= |~#mutexes~0.offset| 0) (= |#memory_$Pointer$.offset| |old(#memory_$Pointer$.offset)|) (<= |mutex_unlock_~m#1.offset| 0) (= |#NULL.offset| 0) (= |mutex_unlock_#in~m#1.offset| 0) (= |old(#valid)| |#valid|) (not (= (ite (not (= |mutex_unlock_#in~m#1.base| 0)) 1 0) 0)) (< 0 |#StackHeapBarrier|) (= |#NULL.base| 0))' at error location [2021-11-23 03:05:08,308 WARN L312 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2021-11-23 03:05:08,308 INFO L186 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2021-11-23 03:05:08,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12, 14] total 37 [2021-11-23 03:05:08,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900362294] [2021-11-23 03:05:08,309 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2021-11-23 03:05:08,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-23 03:05:08,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2021-11-23 03:05:08,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-23 03:05:08,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=3522, Unknown=0, NotChecked=0, Total=3906 [2021-11-23 03:05:08,312 INFO L87 Difference]: Start difference. First operand 139 states and 154 transitions. Second operand has 37 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 32 states have internal predecessors, (94), 20 states have call successors, (37), 6 states have call predecessors, (37), 17 states have return successors, (36), 19 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-23 03:05:13,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:13,615 INFO L93 Difference]: Finished difference Result 239 states and 274 transitions. [2021-11-23 03:05:13,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-23 03:05:13,616 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 32 states have internal predecessors, (94), 20 states have call successors, (37), 6 states have call predecessors, (37), 17 states have return successors, (36), 19 states have call predecessors, (36), 20 states have call successors, (36) Word has length 75 [2021-11-23 03:05:13,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:13,618 INFO L225 Difference]: With dead ends: 239 [2021-11-23 03:05:13,618 INFO L226 Difference]: Without dead ends: 153 [2021-11-23 03:05:13,620 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 173 SyntacticMatches, 5 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1859 ImplicationChecksByTransitivity, 29.3s TimeCoverageRelationStatistics Valid=648, Invalid=5832, Unknown=0, NotChecked=0, Total=6480 [2021-11-23 03:05:13,621 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 150 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 575 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 575 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 20 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:13,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 336 Invalid, 696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 575 Invalid, 0 Unknown, 20 Unchecked, 2.1s Time] [2021-11-23 03:05:13,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-23 03:05:13,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 135. [2021-11-23 03:05:13,648 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) [2021-11-23 03:05:13,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 151 transitions. [2021-11-23 03:05:13,650 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 151 transitions. Word has length 75 [2021-11-23 03:05:13,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:13,650 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 151 transitions. [2021-11-23 03:05:13,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 26 states have (on average 3.6153846153846154) internal successors, (94), 32 states have internal predecessors, (94), 20 states have call successors, (37), 6 states have call predecessors, (37), 17 states have return successors, (36), 19 states have call predecessors, (36), 20 states have call successors, (36) [2021-11-23 03:05:13,651 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 151 transitions. [2021-11-23 03:05:13,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-23 03:05:13,652 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:13,653 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] [2021-11-23 03:05:13,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:13,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:13,867 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:13,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:13,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1481860624, now seen corresponding path program 2 times [2021-11-23 03:05:13,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2021-11-23 03:05:13,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685708065] [2021-11-23 03:05:13,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:13,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-23 03:05:13,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:18,175 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 40 proven. 17 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2021-11-23 03:05:18,176 INFO L139 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2021-11-23 03:05:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685708065] [2021-11-23 03:05:18,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685708065] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:18,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218971669] [2021-11-23 03:05:18,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-23 03:05:18,177 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:18,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:05:18,178 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-23 03:05:18,179 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-23 03:05:19,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-23 03:05:19,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-23 03:05:19,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 562 conjuncts, 182 conjunts are in the unsatisfiable core [2021-11-23 03:05:19,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:20,037 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 [2021-11-23 03:05:22,082 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 [2021-11-23 03:05:22,689 INFO L354 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2021-11-23 03:05:22,689 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 [2021-11-23 03:05:26,372 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:26,378 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 [2021-11-23 03:05:26,393 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:26,445 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:05:26,445 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 43 treesize of output 46 [2021-11-23 03:05:26,959 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 [2021-11-23 03:05:26,970 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 [2021-11-23 03:05:27,323 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:27,861 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:05:27,863 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 [2021-11-23 03:05:28,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:28,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:28,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:28,676 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:28,994 INFO L354 Elim1Store]: treesize reduction 182, result has 24.8 percent of original size [2021-11-23 03:05:28,995 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 [2021-11-23 03:05:30,644 INFO L354 Elim1Store]: treesize reduction 16, result has 51.5 percent of original size [2021-11-23 03:05:30,644 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 118 treesize of output 124 [2021-11-23 03:05:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 52 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-23 03:05:35,775 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:36,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218971669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:36,411 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [576819357] [2021-11-23 03:05:36,414 INFO L159 IcfgInterpreter]: Started Sifa with 37 locations of interest [2021-11-23 03:05:36,415 INFO L166 IcfgInterpreter]: Building call graph [2021-11-23 03:05:36,415 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2021-11-23 03:05:36,416 INFO L176 IcfgInterpreter]: Starting interpretation [2021-11-23 03:05:36,416 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2021-11-23 03:05:36,456 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 [2021-11-23 03:05:36,469 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 [2021-11-23 03:05:36,579 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 [2021-11-23 03:05:36,595 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 [2021-11-23 03:05:36,637 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 [2021-11-23 03:05:36,652 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 [2021-11-23 03:05:36,827 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 [2021-11-23 03:05:36,851 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 [2021-11-23 03:05:36,890 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 [2021-11-23 03:05:36,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:37,283 INFO L354 Elim1Store]: treesize reduction 159, result has 20.9 percent of original size [2021-11-23 03:05:37,284 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 [2021-11-23 03:05:37,315 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:37,750 INFO L354 Elim1Store]: treesize reduction 140, result has 30.3 percent of original size [2021-11-23 03:05:37,751 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 [2021-11-23 03:05:37,793 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:37,969 INFO L354 Elim1Store]: treesize reduction 64, result has 28.9 percent of original size [2021-11-23 03:05:37,970 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 [2021-11-23 03:05:38,080 INFO L354 Elim1Store]: treesize reduction 25, result has 43.2 percent of original size [2021-11-23 03:05:38,081 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 [2021-11-23 03:05:38,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:05:38,167 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 [2021-11-23 03:05:38,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:05:38,222 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 [2021-11-23 03:05:38,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:05:38,298 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 [2021-11-23 03:05:38,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-11-23 03:05:38,351 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 1 case distinctions, treesize of input 15 treesize of output 19 [2021-11-23 03:05:38,411 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 [2021-11-23 03:05:38,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:38,433 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 [2021-11-23 03:05:38,451 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 [2021-11-23 03:05:38,470 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:38,471 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 [2021-11-23 03:05:38,520 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 [2021-11-23 03:05:38,535 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:38,536 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 [2021-11-23 03:05:38,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:38,559 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 [2021-11-23 03:05:38,573 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 [2021-11-23 03:05:38,698 INFO L197 IcfgInterpreter]: Interpreting procedure mutex_lock with input of size 93 for LOIs [2021-11-23 03:05:40,880 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:40,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:40,885 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:40,948 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:05:40,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 414 treesize of output 413 [2021-11-23 03:05:40,981 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:40,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:05:40,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:41,071 INFO L354 Elim1Store]: treesize reduction 13, result has 45.8 percent of original size [2021-11-23 03:05:41,071 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 413 treesize of output 412 [2021-11-23 03:05:41,092 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:05:41,172 INFO L354 Elim1Store]: treesize reduction 19, result has 36.7 percent of original size [2021-11-23 03:05:41,173 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 412 treesize of output 405 [2021-11-23 03:05:41,194 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 405 treesize of output 403 [2021-11-23 03:05:41,237 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 403 treesize of output 401 [2021-11-23 03:05:43,645 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:43,818 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-23 03:05:43,819 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: Some non-self update cases but no top-level DER relation at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.ElimStorePlain.applyComplexEliminationRules(ElimStorePlain.java:340) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:140) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminateOne(DualJunctionSaa.java:115) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryExhaustivelyToEliminate(DualJunctionSaa.java:93) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.DualJunctionSaa.tryToEliminate(DualJunctionSaa.java:88) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToEliminateOne(QuantifierPusher.java:903) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyNewEliminationTechniquesExhaustively(QuantifierPusher.java:865) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.applyDualJunctionEliminationTechniques(QuantifierPusher.java:783) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective2(QuantifierPusher.java:425) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.tryToPushOverDualFiniteConnective(QuantifierPusher.java:355) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:162) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.convert(QuantifierPushTermWalker.java:1) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine$ApplicationTermTask.doStep(TermContextTransformationEngine.java:169) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:77) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.TermContextTransformationEngine.transform(TermContextTransformationEngine.java:61) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:243) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.QuantifierPushTermWalker.eliminate(QuantifierPushTermWalker.java:233) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.newQuantifier(SymbolicTools.java:285) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools$EliminatingTermDomainOperationProvider.projectExistentially(SymbolicTools.java:267) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.TermDomainOperationProvider.projectExistentially(TermDomainOperationProvider.java:1) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateTransformer.strongestPostconditionReturn(PredicateTransformer.java:202) at de.uni_freiburg.informatik.ultimate.lib.sifa.SymbolicTools.postReturn(SymbolicTools.java:150) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:222) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:207) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:187) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:165) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:123) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:136) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:127) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:102) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:268) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:150) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:140) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:88) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:413) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:330) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:393) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:303) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseSequentialProgram(TraceAbstractionStarter.java:263) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:176) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:155) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:123) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-11-23 03:05:43,825 INFO L158 Benchmark]: Toolchain (without parser) took 615226.92ms. Allocated memory was 77.6MB in the beginning and 209.7MB in the end (delta: 132.1MB). Free memory was 44.7MB in the beginning and 122.6MB in the end (delta: -77.9MB). Peak memory consumption was 53.3MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,825 INFO L158 Benchmark]: CDTParser took 0.37ms. Allocated memory is still 77.6MB. Free memory was 34.0MB in the beginning and 34.0MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. [2021-11-23 03:05:43,826 INFO L158 Benchmark]: CACSL2BoogieTranslator took 818.74ms. Allocated memory was 77.6MB in the beginning and 98.6MB in the end (delta: 21.0MB). Free memory was 44.6MB in the beginning and 66.0MB in the end (delta: -21.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,826 INFO L158 Benchmark]: Boogie Procedure Inliner took 60.30ms. Allocated memory is still 98.6MB. Free memory was 66.0MB in the beginning and 63.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,827 INFO L158 Benchmark]: Boogie Preprocessor took 40.61ms. Allocated memory is still 98.6MB. Free memory was 63.9MB in the beginning and 61.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,827 INFO L158 Benchmark]: RCFGBuilder took 721.23ms. Allocated memory is still 98.6MB. Free memory was 61.8MB in the beginning and 40.4MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,828 INFO L158 Benchmark]: TraceAbstraction took 613578.54ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 39.7MB in the beginning and 122.6MB in the end (delta: -82.9MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. [2021-11-23 03:05:43,830 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.37ms. Allocated memory is still 77.6MB. Free memory was 34.0MB in the beginning and 34.0MB in the end (delta: 41.2kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 818.74ms. Allocated memory was 77.6MB in the beginning and 98.6MB in the end (delta: 21.0MB). Free memory was 44.6MB in the beginning and 66.0MB in the end (delta: -21.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 60.30ms. Allocated memory is still 98.6MB. Free memory was 66.0MB in the beginning and 63.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 40.61ms. Allocated memory is still 98.6MB. Free memory was 63.9MB in the beginning and 61.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 721.23ms. Allocated memory is still 98.6MB. Free memory was 61.8MB in the beginning and 40.4MB in the end (delta: 21.4MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 613578.54ms. Allocated memory was 98.6MB in the beginning and 209.7MB in the end (delta: 111.1MB). Free memory was 39.7MB in the beginning and 122.6MB in the end (delta: -82.9MB). Peak memory consumption was 28.7MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: Some non-self update cases but no top-level DER relation de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: Some non-self update cases but no top-level DER relation: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.DerPreprocessor.(DerPreprocessor.java:146) RESULT: Ultimate could not prove your program: Toolchain returned no result. [2021-11-23 03:05:44,044 WARN L435 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forcibly destroying the process [2021-11-23 03:05:44,068 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 137 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V --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 d82f1b23bea4834b28dfbe602ddf1f3e06a3ee60a847e3002a9403f092f2c830 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-aef121e [2021-11-23 03:05:46,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-23 03:05:46,780 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-23 03:05:46,843 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-23 03:05:46,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-23 03:05:46,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-23 03:05:46,851 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-23 03:05:46,857 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-23 03:05:46,861 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-23 03:05:46,871 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-23 03:05:46,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-23 03:05:46,875 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-23 03:05:46,876 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-23 03:05:46,880 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-23 03:05:46,882 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-23 03:05:46,888 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-23 03:05:46,890 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-23 03:05:46,892 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-23 03:05:46,894 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-23 03:05:46,904 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-23 03:05:46,907 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-23 03:05:46,909 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-23 03:05:46,912 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-23 03:05:46,915 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-23 03:05:46,926 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-23 03:05:46,927 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-23 03:05:46,928 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-23 03:05:46,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-23 03:05:46,931 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-23 03:05:46,933 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-23 03:05:46,934 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-23 03:05:46,935 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-23 03:05:46,938 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-23 03:05:46,939 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-23 03:05:46,941 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-23 03:05:46,942 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-23 03:05:46,943 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-23 03:05:46,943 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-23 03:05:46,944 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-23 03:05:46,946 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-23 03:05:46,947 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-23 03:05:46,948 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/config/svcomp-Reach-32bit-Taipan_Bitvector.epf [2021-11-23 03:05:47,002 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-23 03:05:47,003 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-23 03:05:47,004 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-23 03:05:47,004 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-23 03:05:47,006 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2021-11-23 03:05:47,006 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2021-11-23 03:05:47,006 INFO L138 SettingsManager]: * User list type=DISABLED [2021-11-23 03:05:47,007 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2021-11-23 03:05:47,008 INFO L138 SettingsManager]: * Explicit value domain=true [2021-11-23 03:05:47,008 INFO L138 SettingsManager]: * Octagon Domain=false [2021-11-23 03:05:47,010 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2021-11-23 03:05:47,010 INFO L138 SettingsManager]: * Interval Domain=false [2021-11-23 03:05:47,012 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-23 03:05:47,012 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-23 03:05:47,013 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-23 03:05:47,013 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-23 03:05:47,014 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-23 03:05:47,014 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-23 03:05:47,014 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-23 03:05:47,015 INFO L138 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2021-11-23 03:05:47,015 INFO L138 SettingsManager]: * Use bitvectors instead of ints=true [2021-11-23 03:05:47,015 INFO L138 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2021-11-23 03:05:47,016 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-23 03:05:47,016 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-23 03:05:47,016 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-23 03:05:47,017 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-23 03:05:47,017 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-23 03:05:47,018 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-23 03:05:47,018 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-23 03:05:47,018 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:05:47,019 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-23 03:05:47,019 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-23 03:05:47,020 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-23 03:05:47,020 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2021-11-23 03:05:47,021 INFO L138 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2021-11-23 03:05:47,021 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-23 03:05:47,021 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-23 03:05:47,022 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-11-23 03:05:47,022 INFO L138 SettingsManager]: * Logic for external solver=AUFBV WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d82f1b23bea4834b28dfbe602ddf1f3e06a3ee60a847e3002a9403f092f2c830 [2021-11-23 03:05:47,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-23 03:05:47,579 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-23 03:05:47,582 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-23 03:05:47,584 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-23 03:05:47,585 INFO L275 PluginConnector]: CDTParser initialized [2021-11-23 03:05:47,586 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/../../sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i [2021-11-23 03:05:47,664 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/c65a7cc5d/281fcb876b454b578df09352f24b02e0/FLAG7d2230ae2 [2021-11-23 03:05:48,421 INFO L306 CDTParser]: Found 1 translation units. [2021-11-23 03:05:48,422 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i [2021-11-23 03:05:48,449 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/c65a7cc5d/281fcb876b454b578df09352f24b02e0/FLAG7d2230ae2 [2021-11-23 03:05:48,607 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/data/c65a7cc5d/281fcb876b454b578df09352f24b02e0 [2021-11-23 03:05:48,610 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-23 03:05:48,612 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-23 03:05:48,616 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-23 03:05:48,616 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-23 03:05:48,621 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-23 03:05:48,623 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:48" (1/1) ... [2021-11-23 03:05:48,625 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c7630eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:48, skipping insertion in model container [2021-11-23 03:05:48,628 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:05:48" (1/1) ... [2021-11-23 03:05:48,637 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-23 03:05:48,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:05:49,211 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25842,25855] [2021-11-23 03:05:49,216 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25967,25980] [2021-11-23 03:05:49,218 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[26082,26095] [2021-11-23 03:05:49,222 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:05:49,244 INFO L200 MainTranslator]: Restarting translation with changed settings: SettingsChange [mNewPreferredMemoryModel=HoenickeLindenmann_1ByteResolution] [2021-11-23 03:05:49,268 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-23 03:05:49,362 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25842,25855] [2021-11-23 03:05:49,364 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25967,25980] [2021-11-23 03:05:49,367 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[26082,26095] [2021-11-23 03:05:49,380 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:05:49,385 INFO L203 MainTranslator]: Completed pre-run [2021-11-23 03:05:49,451 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25842,25855] [2021-11-23 03:05:49,453 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[25967,25980] [2021-11-23 03:05:49,454 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_e183f565-7407-48d5-8ef9-2d841d2cda44/sv-benchmarks/c/ldv-sets/test_mutex_double_unlock.i[26082,26095] [2021-11-23 03:05:49,455 INFO L209 PostProcessor]: Analyzing one entry point: main [2021-11-23 03:05:49,500 INFO L208 MainTranslator]: Completed translation [2021-11-23 03:05:49,501 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49 WrapperNode [2021-11-23 03:05:49,501 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-23 03:05:49,503 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-23 03:05:49,503 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-23 03:05:49,503 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-23 03:05:49,512 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,535 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,568 INFO L137 Inliner]: procedures = 140, calls = 57, calls flagged for inlining = 14, calls inlined = 13, statements flattened = 125 [2021-11-23 03:05:49,578 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-23 03:05:49,580 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-23 03:05:49,580 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-23 03:05:49,581 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-23 03:05:49,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,618 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,618 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,634 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,640 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,653 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,667 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-23 03:05:49,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-23 03:05:49,676 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-23 03:05:49,676 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-23 03:05:49,677 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (1/1) ... [2021-11-23 03:05:49,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-23 03:05:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 [2021-11-23 03:05:49,719 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-23 03:05:49,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-23 03:05:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure __ldv_list_add [2021-11-23 03:05:49,782 INFO L138 BoogieDeclarations]: Found implementation of procedure __ldv_list_add [2021-11-23 03:05:49,782 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_unlock [2021-11-23 03:05:49,783 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_unlock [2021-11-23 03:05:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2021-11-23 03:05:49,783 INFO L130 BoogieDeclarations]: Found specification of procedure mutex_lock [2021-11-23 03:05:49,783 INFO L138 BoogieDeclarations]: Found implementation of procedure mutex_lock [2021-11-23 03:05:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2021-11-23 03:05:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2021-11-23 03:05:49,784 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_is_in_set [2021-11-23 03:05:49,784 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_is_in_set [2021-11-23 03:05:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2021-11-23 03:05:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-23 03:05:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2021-11-23 03:05:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1 [2021-11-23 03:05:49,785 INFO L130 BoogieDeclarations]: Found specification of procedure ldv_successful_malloc [2021-11-23 03:05:49,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ldv_successful_malloc [2021-11-23 03:05:49,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-23 03:05:49,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-23 03:05:50,004 INFO L236 CfgBuilder]: Building ICFG [2021-11-23 03:05:50,006 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2021-11-23 03:05:50,616 INFO L277 CfgBuilder]: Performing block encoding [2021-11-23 03:05:50,633 INFO L296 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-23 03:05:50,634 INFO L301 CfgBuilder]: Removed 2 assume(true) statements. [2021-11-23 03:05:50,637 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:50 BoogieIcfgContainer [2021-11-23 03:05:50,637 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-23 03:05:50,639 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-23 03:05:50,639 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-23 03:05:50,643 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-23 03:05:50,643 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:05:48" (1/3) ... [2021-11-23 03:05:50,644 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ce7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:50, skipping insertion in model container [2021-11-23 03:05:50,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:05:49" (2/3) ... [2021-11-23 03:05:50,645 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@38ce7c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:05:50, skipping insertion in model container [2021-11-23 03:05:50,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:05:50" (3/3) ... [2021-11-23 03:05:50,647 INFO L111 eAbstractionObserver]: Analyzing ICFG test_mutex_double_unlock.i [2021-11-23 03:05:50,654 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-23 03:05:50,654 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2021-11-23 03:05:50,731 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-23 03:05:50,740 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 [2021-11-23 03:05:50,740 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-11-23 03:05:50,766 INFO L276 IsEmpty]: Start isEmpty. Operand has 67 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 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) [2021-11-23 03:05:50,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:05:50,776 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:50,777 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:05:50,778 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash 673246785, now seen corresponding path program 1 times [2021-11-23 03:05:50,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:05:50,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1332487829] [2021-11-23 03:05:50,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:50,807 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:05:50,807 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:05:50,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:05:50,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Waiting until timeout for monitored process [2021-11-23 03:05:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:50,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 1 conjunts are in the unsatisfiable core [2021-11-23 03:05:51,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:51,139 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-23 03:05:51,140 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:51,278 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-23 03:05:51,279 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:05:51,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1332487829] [2021-11-23 03:05:51,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1332487829] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:51,280 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:05:51,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [2] total 2 [2021-11-23 03:05:51,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595057914] [2021-11-23 03:05:51,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:51,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-23 03:05:51,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:05:51,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-23 03:05:51,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:05:51,336 INFO L87 Difference]: Start difference. First operand has 67 states, 47 states have (on average 1.297872340425532) internal successors, (61), 50 states have internal predecessors, (61), 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 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:05:51,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:51,407 INFO L93 Difference]: Finished difference Result 130 states and 171 transitions. [2021-11-23 03:05:51,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-23 03:05:51,409 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 27 [2021-11-23 03:05:51,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:51,418 INFO L225 Difference]: With dead ends: 130 [2021-11-23 03:05:51,418 INFO L226 Difference]: Without dead ends: 62 [2021-11-23 03:05:51,422 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-23 03:05:51,427 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:51,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:05:51,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-23 03:05:51,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-11-23 03:05:51,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 43 states have (on average 1.1627906976744187) internal successors, (50), 45 states have internal predecessors, (50), 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) [2021-11-23 03:05:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2021-11-23 03:05:51,480 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 27 [2021-11-23 03:05:51,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:51,481 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2021-11-23 03:05:51,481 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 9.0) internal successors, (18), 2 states have internal predecessors, (18), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2021-11-23 03:05:51,481 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2021-11-23 03:05:51,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:05:51,484 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:51,485 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:05:51,509 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (2)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:51,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:05:51,710 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:51,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:51,711 INFO L85 PathProgramCache]: Analyzing trace with hash -387762175, now seen corresponding path program 1 times [2021-11-23 03:05:51,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:05:51,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [36547282] [2021-11-23 03:05:51,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:51,713 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:05:51,713 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:05:51,715 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:05:51,721 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Waiting until timeout for monitored process [2021-11-23 03:05:51,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:51,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-23 03:05:51,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:52,749 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:05:52,750 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:05:53,385 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:05:53,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [36547282] [2021-11-23 03:05:53,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [36547282] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:05:53,394 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:05:53,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 5] imperfect sequences [] total 8 [2021-11-23 03:05:53,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013728430] [2021-11-23 03:05:53,395 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:53,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-23 03:05:53,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:05:53,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-23 03:05:53,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-11-23 03:05:53,403 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:05:54,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:54,720 INFO L93 Difference]: Finished difference Result 195 states and 243 transitions. [2021-11-23 03:05:54,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-23 03:05:54,721 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) Word has length 27 [2021-11-23 03:05:54,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:54,726 INFO L225 Difference]: With dead ends: 195 [2021-11-23 03:05:54,726 INFO L226 Difference]: Without dead ends: 141 [2021-11-23 03:05:54,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-11-23 03:05:54,730 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 103 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:54,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 292 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2021-11-23 03:05:54,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-11-23 03:05:54,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 120. [2021-11-23 03:05:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 85 states have (on average 1.2470588235294118) internal successors, (106), 90 states have internal predecessors, (106), 19 states have call successors, (19), 9 states have call predecessors, (19), 13 states have return successors, (31), 20 states have call predecessors, (31), 19 states have call successors, (31) [2021-11-23 03:05:54,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 156 transitions. [2021-11-23 03:05:54,764 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 156 transitions. Word has length 27 [2021-11-23 03:05:54,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:54,765 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 156 transitions. [2021-11-23 03:05:54,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (6), 3 states have call predecessors, (6), 2 states have call successors, (6) [2021-11-23 03:05:54,766 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 156 transitions. [2021-11-23 03:05:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-23 03:05:54,767 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:54,767 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-23 03:05:54,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (3)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:54,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:05:54,984 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:54,985 INFO L85 PathProgramCache]: Analyzing trace with hash -438555830, now seen corresponding path program 1 times [2021-11-23 03:05:54,985 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:05:54,985 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1080999763] [2021-11-23 03:05:54,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:54,986 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:05:54,986 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:05:54,987 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:05:54,992 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Waiting until timeout for monitored process [2021-11-23 03:05:55,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:55,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:05:55,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:55,187 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:05:55,188 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:55,271 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-11-23 03:05:55,271 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:05:55,271 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1080999763] [2021-11-23 03:05:55,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1080999763] provided 2 perfect and 0 imperfect interpolant sequences [2021-11-23 03:05:55,272 INFO L186 FreeRefinementEngine]: Found 2 perfect and 0 imperfect interpolant sequences. [2021-11-23 03:05:55,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4, 4] imperfect sequences [] total 4 [2021-11-23 03:05:55,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994589512] [2021-11-23 03:05:55,273 INFO L85 oduleStraightlineAll]: Using 2 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:55,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:05:55,274 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:05:55,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:05:55,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:05:55,275 INFO L87 Difference]: Start difference. First operand 120 states and 156 transitions. Second operand has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-23 03:05:55,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:05:55,295 INFO L93 Difference]: Finished difference Result 127 states and 166 transitions. [2021-11-23 03:05:55,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:05:55,296 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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 27 [2021-11-23 03:05:55,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:05:55,299 INFO L225 Difference]: With dead ends: 127 [2021-11-23 03:05:55,299 INFO L226 Difference]: Without dead ends: 125 [2021-11-23 03:05:55,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:05:55,302 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 0 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:05:55,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 215 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:05:55,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-23 03:05:55,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 123. [2021-11-23 03:05:55,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 87 states have (on average 1.2183908045977012) internal successors, (106), 92 states have internal predecessors, (106), 19 states have call successors, (19), 9 states have call predecessors, (19), 14 states have return successors, (35), 21 states have call predecessors, (35), 19 states have call successors, (35) [2021-11-23 03:05:55,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 160 transitions. [2021-11-23 03:05:55,327 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 160 transitions. Word has length 27 [2021-11-23 03:05:55,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:05:55,328 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 160 transitions. [2021-11-23 03:05:55,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.0) internal successors, (16), 3 states have internal predecessors, (16), 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) [2021-11-23 03:05:55,329 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 160 transitions. [2021-11-23 03:05:55,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:05:55,332 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:05:55,333 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 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] [2021-11-23 03:05:55,370 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (4)] Forceful destruction successful, exit code 0 [2021-11-23 03:05:55,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:05:55,553 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:05:55,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:05:55,554 INFO L85 PathProgramCache]: Analyzing trace with hash -811626959, now seen corresponding path program 1 times [2021-11-23 03:05:55,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:05:55,555 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1433819218] [2021-11-23 03:05:55,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:05:55,555 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:05:55,555 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:05:55,557 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:05:55,564 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Waiting until timeout for monitored process [2021-11-23 03:05:55,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:05:55,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-23 03:05:55,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:05:56,121 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 [2021-11-23 03:05:56,133 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 [2021-11-23 03:05:56,714 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 39 proven. 0 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2021-11-23 03:05:56,714 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:05:57,758 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 8 treesize of output 4 [2021-11-23 03:05:57,770 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 8 treesize of output 4 [2021-11-23 03:05:58,261 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2021-11-23 03:05:58,262 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:05:58,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1433819218] [2021-11-23 03:05:58,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [1433819218] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:05:58,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:05:58,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [8] total 15 [2021-11-23 03:05:58,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758109575] [2021-11-23 03:05:58,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:05:58,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-23 03:05:58,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:05:58,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-23 03:05:58,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-11-23 03:05:58,266 INFO L87 Difference]: Start difference. First operand 123 states and 160 transitions. Second operand has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-11-23 03:06:00,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:00,986 INFO L93 Difference]: Finished difference Result 291 states and 374 transitions. [2021-11-23 03:06:00,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-23 03:06:00,987 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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 67 [2021-11-23 03:06:00,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:00,991 INFO L225 Difference]: With dead ends: 291 [2021-11-23 03:06:00,992 INFO L226 Difference]: Without dead ends: 166 [2021-11-23 03:06:00,994 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 119 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=170, Invalid=480, Unknown=0, NotChecked=0, Total=650 [2021-11-23 03:06:00,995 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 249 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:00,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 311 Invalid, 465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2021-11-23 03:06:00,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-23 03:06:01,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2021-11-23 03:06:01,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 86 states have (on average 1.186046511627907) internal successors, (102), 92 states have internal predecessors, (102), 19 states have call successors, (19), 10 states have call predecessors, (19), 14 states have return successors, (32), 19 states have call predecessors, (32), 19 states have call successors, (32) [2021-11-23 03:06:01,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 153 transitions. [2021-11-23 03:06:01,027 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 153 transitions. Word has length 67 [2021-11-23 03:06:01,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:01,027 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 153 transitions. [2021-11-23 03:06:01,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 4.75) internal successors, (38), 8 states have internal predecessors, (38), 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) [2021-11-23 03:06:01,028 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 153 transitions. [2021-11-23 03:06:01,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-23 03:06:01,032 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:01,032 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 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] [2021-11-23 03:06:01,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (5)] Forceful destruction successful, exit code 0 [2021-11-23 03:06:01,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:06:01,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:01,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash 1108503363, now seen corresponding path program 1 times [2021-11-23 03:06:01,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:06:01,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [667708444] [2021-11-23 03:06:01,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:01,249 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:06:01,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:06:01,263 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:06:01,266 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Waiting until timeout for monitored process [2021-11-23 03:06:01,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:01,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-23 03:06:01,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 38 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-11-23 03:06:01,604 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-23 03:06:01,802 INFO L139 FreeRefinementEngine]: Strategy WALRUS found an infeasible trace [2021-11-23 03:06:01,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [667708444] [2021-11-23 03:06:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleMathsat [667708444] provided 1 perfect and 1 imperfect interpolant sequences [2021-11-23 03:06:01,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2021-11-23 03:06:01,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 4 [2021-11-23 03:06:01,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567393524] [2021-11-23 03:06:01,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2021-11-23 03:06:01,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-23 03:06:01,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2021-11-23 03:06:01,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-23 03:06:01,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:06:01,805 INFO L87 Difference]: Start difference. First operand 122 states and 153 transitions. Second operand has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-23 03:06:01,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-23 03:06:01,829 INFO L93 Difference]: Finished difference Result 196 states and 237 transitions. [2021-11-23 03:06:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-23 03:06:01,830 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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 67 [2021-11-23 03:06:01,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-23 03:06:01,833 INFO L225 Difference]: With dead ends: 196 [2021-11-23 03:06:01,833 INFO L226 Difference]: Without dead ends: 109 [2021-11-23 03:06:01,834 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-23 03:06:01,835 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 0 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2021-11-23 03:06:01,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [0 Valid, 212 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2021-11-23 03:06:01,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-11-23 03:06:01,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 103. [2021-11-23 03:06:01,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 77 states have internal predecessors, (83), 15 states have call successors, (15), 9 states have call predecessors, (15), 12 states have return successors, (23), 16 states have call predecessors, (23), 15 states have call successors, (23) [2021-11-23 03:06:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 121 transitions. [2021-11-23 03:06:01,856 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 121 transitions. Word has length 67 [2021-11-23 03:06:01,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-23 03:06:01,857 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 121 transitions. [2021-11-23 03:06:01,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 8.0) internal successors, (32), 3 states have internal predecessors, (32), 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) [2021-11-23 03:06:01,858 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 121 transitions. [2021-11-23 03:06:01,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-23 03:06:01,860 INFO L506 BasicCegarLoop]: Found error trace [2021-11-23 03:06:01,861 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1] [2021-11-23 03:06:01,882 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (6)] Forceful destruction successful, exit code 0 [2021-11-23 03:06:02,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 [2021-11-23 03:06:02,079 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION === [mutex_unlockErr0ASSERT_VIOLATIONERROR_FUNCTION, mutex_lockErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-23 03:06:02,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-23 03:06:02,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1210243856, now seen corresponding path program 1 times [2021-11-23 03:06:02,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy WALRUS [2021-11-23 03:06:02,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1679061209] [2021-11-23 03:06:02,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-23 03:06:02,081 INFO L168 SolverBuilder]: Constructing external solver with command: mathsat -unsat_core_generation=3 [2021-11-23 03:06:02,081 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat [2021-11-23 03:06:02,084 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) [2021-11-23 03:06:02,087 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e183f565-7407-48d5-8ef9-2d841d2cda44/bin/utaipan-EQgc7hIp5V/mathsat -unsat_core_generation=3 (7)] Waiting until timeout for monitored process [2021-11-23 03:06:02,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-23 03:06:02,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-23 03:06:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-23 03:06:02,624 INFO L354 Elim1Store]: treesize reduction 12, result has 40.0 percent of original size [2021-11-23 03:06:02,624 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 1 case distinctions, treesize of input 16 treesize of output 21 [2021-11-23 03:06:02,983 INFO L354 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2021-11-23 03:06:02,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 44 [2021-11-23 03:06:03,133 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 [2021-11-23 03:06:08,240 INFO L354 Elim1Store]: treesize reduction 166, result has 26.9 percent of original size [2021-11-23 03:06:08,240 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 [2021-11-23 03:06:17,389 INFO L173 IndexEqualityManager]: detected equality via solver [2021-11-23 03:06:17,398 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:17,400 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:17,613 INFO L354 Elim1Store]: treesize reduction 570, result has 11.9 percent of original size [2021-11-23 03:06:17,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 2 stores, 1 select indices, 1 select index equivalence classes, 3 disjoint index pairs (out of 0 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 583 treesize of output 296 [2021-11-23 03:06:17,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:17,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:17,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 4 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 110 treesize of output 36 [2021-11-23 03:06:18,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:18,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:18,293 INFO L354 Elim1Store]: treesize reduction 126, result has 0.8 percent of original size [2021-11-23 03:06:18,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 4 disjoint index pairs (out of 10 index pairs), introduced 6 new quantified variables, introduced 4 case distinctions, treesize of input 128 treesize of output 39 [2021-11-23 03:06:20,375 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,379 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,384 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 03:06:20,384 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 162 treesize of output 98 [2021-11-23 03:06:20,428 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,436 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 03:06:20,437 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 160 treesize of output 96 [2021-11-23 03:06:20,471 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-11-23 03:06:20,479 INFO L354 Elim1Store]: treesize reduction 42, result has 2.3 percent of original size [2021-11-23 03:06:20,480 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 6 new quantified variables, introduced 6 case distinctions, treesize of input 200 treesize of output 128 [2021-11-23 03:06:41,016 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-23 03:06:41,017 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2021-11-23 03:06:56,250 WARN L838 $PredicateComparison]: unable to prove that (forall ((v___ldv_list_add_~next.offset_7 (_ BitVec 32)) (|v_mutex_lock_ldv_list_add_~new#1.base_8| (_ BitVec 32))) (not (= (select (select (let ((.cse0 (let ((.cse3 (store |c_#memory_$Pointer$.base| |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (select |c_#memory_$Pointer$.base| |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32) |c_ULTIMATE.start_foo_~m1~0#1.base|)))) (let ((.cse2 (select (select .cse3 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (let ((.cse1 (store .cse3 .cse2 (store (select .cse3 .cse2) (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_7) |v_mutex_lock_ldv_list_add_~new#1.base_8|)))) (store .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (store (select .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv4 32) .cse2) (_ bv8 32) |c_~#mutexes~0.base|))))))) (store .cse0 |c_~#mutexes~0.base| (store (select .cse0 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset| |v_mutex_lock_ldv_list_add_~new#1.base_8|))) |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32)) |c_ULTIMATE.start_foo_~m2~0#1.base|))) is different from false [2021-11-23 03:06:58,320 WARN L860 $PredicateComparison]: unable to prove that (exists ((v___ldv_list_add_~next.offset_7 (_ BitVec 32)) (|v_mutex_lock_ldv_list_add_~new#1.base_8| (_ BitVec 32))) (= (select (select |c_#memory_$Pointer$.base| (select (select |c_#memory_$Pointer$.base| |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|)) (bvadd (_ bv4294967292 32) (select (select |c_#memory_$Pointer$.offset| |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (select (select (let ((.cse0 (let ((.cse3 (store |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (select |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32) |c_mutex_lock_#in~m#1.base|)))) (let ((.cse2 (select (select .cse3 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (let ((.cse1 (store .cse3 .cse2 (store (select .cse3 .cse2) (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_7) |v_mutex_lock_ldv_list_add_~new#1.base_8|)))) (store .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (store (select .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv4 32) .cse2) (_ bv8 32) |c_~#mutexes~0.base|))))))) (store .cse0 |c_~#mutexes~0.base| (store (select .cse0 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset| |v_mutex_lock_ldv_list_add_~new#1.base_8|))) |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32)))) is different from true [2021-11-23 03:07:03,604 WARN L838 $PredicateComparison]: unable to prove that (forall ((|v_#memory_$Pointer$.offset_69| (Array (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32)))) (v___ldv_list_add_~next.offset_10 (_ BitVec 32))) (exists ((v___ldv_list_add_~next.offset_7 (_ BitVec 32)) (|v_mutex_lock_ldv_list_add_~new#1.base_8| (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse3 (store |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (select |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32) |c_mutex_lock_#in~m#1.base|)))) (let ((.cse2 (select (select .cse3 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (let ((.cse1 (store .cse3 .cse2 (store (select .cse3 .cse2) (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_7) |v_mutex_lock_ldv_list_add_~new#1.base_8|)))) (store .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (store (select .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv4 32) .cse2) (_ bv8 32) |c_~#mutexes~0.base|))))))) (store .cse0 |c_~#mutexes~0.base| (store (select .cse0 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset| |v_mutex_lock_ldv_list_add_~new#1.base_8|))) |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32)) (let ((.cse7 (bvadd (_ bv4 32) |c_mutex_lock_ldv_list_add_~new#1.offset|)) (.cse8 (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_10))) (select (let ((.cse4 (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_mutex_lock_ldv_list_add_#t~mem6#1.base| (store (select |c_#memory_$Pointer$.base| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse8 |c_mutex_lock_ldv_list_add_~new#1.base|)))) (store .cse6 |c_mutex_lock_ldv_list_add_~new#1.base| (store (store (select .cse6 |c_mutex_lock_ldv_list_add_~new#1.base|) |c_mutex_lock_ldv_list_add_~new#1.offset| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse7 |c_mutex_lock_ldv_list_add_~head#1.base|))))) (store .cse5 |c_mutex_lock_ldv_list_add_~head#1.base| (store (select .cse5 |c_mutex_lock_ldv_list_add_~head#1.base|) |c_mutex_lock_ldv_list_add_~head#1.offset| |c_mutex_lock_ldv_list_add_~new#1.base|))))) (select .cse4 (select (select .cse4 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (bvadd (_ bv4294967292 32) (select (select (let ((.cse9 (let ((.cse10 (store |v_#memory_$Pointer$.offset_69| |c_mutex_lock_ldv_list_add_#t~mem6#1.base| (store (select |v_#memory_$Pointer$.offset_69| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse8 |c_mutex_lock_ldv_list_add_~new#1.offset|)))) (store .cse10 |c_mutex_lock_ldv_list_add_~new#1.base| (store (store (select .cse10 |c_mutex_lock_ldv_list_add_~new#1.base|) |c_mutex_lock_ldv_list_add_~new#1.offset| v___ldv_list_add_~next.offset_10) .cse7 |c_mutex_lock_ldv_list_add_~head#1.offset|))))) (store .cse9 |c_mutex_lock_ldv_list_add_~head#1.base| (store (select .cse9 |c_mutex_lock_ldv_list_add_~head#1.base|) |c_mutex_lock_ldv_list_add_~head#1.offset| |c_mutex_lock_ldv_list_add_~new#1.offset|))) |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))))))) is different from false [2021-11-23 03:07:05,614 WARN L860 $PredicateComparison]: unable to prove that (forall ((|v_#memory_$Pointer$.offset_69| (Array (_ BitVec 32) (Array (_ BitVec 32) (_ BitVec 32)))) (v___ldv_list_add_~next.offset_10 (_ BitVec 32))) (exists ((v___ldv_list_add_~next.offset_7 (_ BitVec 32)) (|v_mutex_lock_ldv_list_add_~new#1.base_8| (_ BitVec 32))) (= (select (select (let ((.cse0 (let ((.cse3 (store |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (select |c_old(#memory_$Pointer$.base)| |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32) |c_mutex_lock_#in~m#1.base|)))) (let ((.cse2 (select (select .cse3 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (let ((.cse1 (store .cse3 .cse2 (store (select .cse3 .cse2) (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_7) |v_mutex_lock_ldv_list_add_~new#1.base_8|)))) (store .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8| (store (store (select .cse1 |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv4 32) .cse2) (_ bv8 32) |c_~#mutexes~0.base|))))))) (store .cse0 |c_~#mutexes~0.base| (store (select .cse0 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset| |v_mutex_lock_ldv_list_add_~new#1.base_8|))) |v_mutex_lock_ldv_list_add_~new#1.base_8|) (_ bv0 32)) (let ((.cse7 (bvadd (_ bv4 32) |c_mutex_lock_ldv_list_add_~new#1.offset|)) (.cse8 (bvadd (_ bv4 32) v___ldv_list_add_~next.offset_10))) (select (let ((.cse4 (let ((.cse5 (let ((.cse6 (store |c_#memory_$Pointer$.base| |c_mutex_lock_ldv_list_add_#t~mem6#1.base| (store (select |c_#memory_$Pointer$.base| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse8 |c_mutex_lock_ldv_list_add_~new#1.base|)))) (store .cse6 |c_mutex_lock_ldv_list_add_~new#1.base| (store (store (select .cse6 |c_mutex_lock_ldv_list_add_~new#1.base|) |c_mutex_lock_ldv_list_add_~new#1.offset| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse7 |c_mutex_lock_ldv_list_add_~head#1.base|))))) (store .cse5 |c_mutex_lock_ldv_list_add_~head#1.base| (store (select .cse5 |c_mutex_lock_ldv_list_add_~head#1.base|) |c_mutex_lock_ldv_list_add_~head#1.offset| |c_mutex_lock_ldv_list_add_~new#1.base|))))) (select .cse4 (select (select .cse4 |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))) (bvadd (_ bv4294967292 32) (select (select (let ((.cse9 (let ((.cse10 (store |v_#memory_$Pointer$.offset_69| |c_mutex_lock_ldv_list_add_#t~mem6#1.base| (store (select |v_#memory_$Pointer$.offset_69| |c_mutex_lock_ldv_list_add_#t~mem6#1.base|) .cse8 |c_mutex_lock_ldv_list_add_~new#1.offset|)))) (store .cse10 |c_mutex_lock_ldv_list_add_~new#1.base| (store (store (select .cse10 |c_mutex_lock_ldv_list_add_~new#1.base|) |c_mutex_lock_ldv_list_add_~new#1.offset| v___ldv_list_add_~next.offset_10) .cse7 |c_mutex_lock_ldv_list_add_~head#1.offset|))))) (store .cse9 |c_mutex_lock_ldv_list_add_~head#1.base| (store (select .cse9 |c_mutex_lock_ldv_list_add_~head#1.base|) |c_mutex_lock_ldv_list_add_~head#1.offset| |c_mutex_lock_ldv_list_add_~new#1.offset|))) |c_~#mutexes~0.base|) |c_~#mutexes~0.offset|))))))) is different from true [2021-11-23 03:07:06,556 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 1301 treesize of output 1277 [2021-11-23 03:07:09,174 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 34894 treesize of output 34846