./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW --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 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-4e7fbc6 [2022-11-23 15:04:29,406 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:04:29,408 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:04:29,440 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:04:29,441 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:04:29,445 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:04:29,448 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:04:29,449 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:04:29,451 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:04:29,452 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:04:29,453 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:04:29,454 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:04:29,455 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:04:29,456 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:04:29,457 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:04:29,458 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:04:29,462 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:04:29,469 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:04:29,472 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:04:29,482 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:04:29,483 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:04:29,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:04:29,488 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:04:29,489 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:04:29,492 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:04:29,493 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:04:29,493 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:04:29,494 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:04:29,495 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:04:29,502 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:04:29,503 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:04:29,504 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:04:29,506 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:04:29,507 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:04:29,508 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:04:29,508 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:04:29,509 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:04:29,509 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:04:29,510 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:04:29,511 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:04:29,512 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:04:29,513 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:04:29,554 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:04:29,555 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:04:29,555 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:04:29,555 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:04:29,556 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:04:29,557 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:04:29,557 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:04:29,557 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:04:29,557 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:04:29,557 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:04:29,558 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:04:29,559 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:04:29,559 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:04:29,559 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:04:29,559 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:04:29,560 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:04:29,560 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:04:29,560 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:04:29,561 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:04:29,561 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:04:29,561 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:04:29,561 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:04:29,562 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:04:29,562 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:04:29,562 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:04:29,562 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:04:29,562 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:04:29,563 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:04:29,563 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:04:29,563 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:04:29,564 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:04:29,564 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:04:29,564 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:04:29,564 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:04:29,565 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:04:29,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:04:29,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:04:29,565 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:04:29,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:04:29,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:04:29,566 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:04:29,566 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3e2f466b16db44ce2fec1aabf9e70b4ab734ef2801c32e66d10c5bcbcceb5301 [2022-11-23 15:04:29,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:04:29,915 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:04:29,918 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:04:29,919 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:04:29,920 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:04:29,921 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-11-23 15:04:32,939 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:04:33,182 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:04:33,183 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i [2022-11-23 15:04:33,196 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/data/f45fb0c04/67ddfd1c485d424ab72dce1de3f3f359/FLAG44299e770 [2022-11-23 15:04:33,211 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/data/f45fb0c04/67ddfd1c485d424ab72dce1de3f3f359 [2022-11-23 15:04:33,214 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:04:33,215 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:04:33,217 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:04:33,217 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:04:33,221 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:04:33,221 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,223 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@531dbaab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33, skipping insertion in model container [2022-11-23 15:04:33,223 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,231 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:04:33,285 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:04:33,514 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 15:04:33,696 WARN L237 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_0bdd92c1-2918-436f-a3c0-80a764093966/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-11-23 15:04:33,716 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:04:33,730 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:04:33,760 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 15:04:33,788 WARN L237 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_0bdd92c1-2918-436f-a3c0-80a764093966/sv-benchmarks/c/pthread-atomic/read_write_lock-2.i[31244,31257] [2022-11-23 15:04:33,794 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:04:33,830 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:04:33,830 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33 WrapperNode [2022-11-23 15:04:33,831 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:04:33,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:04:33,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:04:33,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:04:33,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,854 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,888 INFO L138 Inliner]: procedures = 174, calls = 51, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 119 [2022-11-23 15:04:33,891 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:04:33,892 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:04:33,892 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:04:33,892 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:04:33,903 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,904 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,919 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,921 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,927 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,938 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,940 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,946 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,949 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:04:33,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:04:33,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:04:33,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:04:33,956 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (1/1) ... [2022-11-23 15:04:33,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:04:33,975 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:04:33,993 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:04:34,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:04:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:04:34,037 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-11-23 15:04:34,038 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 15:04:34,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:04:34,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:04:34,039 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-11-23 15:04:34,039 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-11-23 15:04:34,040 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-23 15:04:34,169 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:04:34,177 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:04:34,421 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:04:34,474 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:04:34,474 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:04:34,477 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:34 BoogieIcfgContainer [2022-11-23 15:04:34,477 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:04:34,479 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:04:34,479 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:04:34,483 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:04:34,483 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:04:33" (1/3) ... [2022-11-23 15:04:34,488 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5023a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:34, skipping insertion in model container [2022-11-23 15:04:34,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:04:33" (2/3) ... [2022-11-23 15:04:34,489 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1f5023a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:04:34, skipping insertion in model container [2022-11-23 15:04:34,489 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:34" (3/3) ... [2022-11-23 15:04:34,490 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-2.i [2022-11-23 15:04:34,498 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 15:04:34,508 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:04:34,509 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:04:34,509 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:04:34,591 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 15:04:34,631 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:04:34,645 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 125 places, 114 transitions, 260 flow [2022-11-23 15:04:34,648 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 125 places, 114 transitions, 260 flow [2022-11-23 15:04:34,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 125 places, 114 transitions, 260 flow [2022-11-23 15:04:34,707 INFO L130 PetriNetUnfolder]: 2/110 cut-off events. [2022-11-23 15:04:34,708 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 15:04:34,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 127 conditions, 110 events. 2/110 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 100 event pairs, 0 based on Foata normal form. 0/106 useless extension candidates. Maximal degree in co-relation 74. Up to 2 conditions per place. [2022-11-23 15:04:34,750 INFO L119 LiptonReduction]: Number of co-enabled transitions 2574 [2022-11-23 15:04:38,681 INFO L134 LiptonReduction]: Checked pairs total: 12994 [2022-11-23 15:04:38,681 INFO L136 LiptonReduction]: Total number of compositions: 83 [2022-11-23 15:04:38,689 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 44 transitions, 120 flow [2022-11-23 15:04:38,909 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 3520 states, 3515 states have (on average 3.732574679943101) internal successors, (13120), 3519 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:38,940 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:04:38,945 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@318e9194, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:04:38,945 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-23 15:04:38,960 INFO L276 IsEmpty]: Start isEmpty. Operand has 3520 states, 3515 states have (on average 3.732574679943101) internal successors, (13120), 3519 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:38,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:04:38,967 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:38,968 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:38,969 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:38,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:38,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1538201813, now seen corresponding path program 1 times [2022-11-23 15:04:38,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:38,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208542620] [2022-11-23 15:04:38,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:38,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:39,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:39,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:39,331 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:39,331 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208542620] [2022-11-23 15:04:39,332 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208542620] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:39,332 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:39,332 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:04:39,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748904973] [2022-11-23 15:04:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:39,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:04:39,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:39,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:04:39,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:04:39,374 INFO L87 Difference]: Start difference. First operand has 3520 states, 3515 states have (on average 3.732574679943101) internal successors, (13120), 3519 states have internal predecessors, (13120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:39,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:39,815 INFO L93 Difference]: Finished difference Result 7138 states and 25390 transitions. [2022-11-23 15:04:39,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:04:39,818 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2022-11-23 15:04:39,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:39,894 INFO L225 Difference]: With dead ends: 7138 [2022-11-23 15:04:39,895 INFO L226 Difference]: Without dead ends: 6196 [2022-11-23 15:04:39,896 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:04:39,902 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 147 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:39,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 20 Invalid, 280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:04:40,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6196 states. [2022-11-23 15:04:40,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6196 to 4138. [2022-11-23 15:04:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4138 states, 4135 states have (on average 3.6135429262394196) internal successors, (14942), 4137 states have internal predecessors, (14942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4138 states to 4138 states and 14942 transitions. [2022-11-23 15:04:40,239 INFO L78 Accepts]: Start accepts. Automaton has 4138 states and 14942 transitions. Word has length 9 [2022-11-23 15:04:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:40,240 INFO L495 AbstractCegarLoop]: Abstraction has 4138 states and 14942 transitions. [2022-11-23 15:04:40,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,245 INFO L276 IsEmpty]: Start isEmpty. Operand 4138 states and 14942 transitions. [2022-11-23 15:04:40,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:04:40,254 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:40,254 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:40,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:04:40,255 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:40,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:40,256 INFO L85 PathProgramCache]: Analyzing trace with hash 1432416482, now seen corresponding path program 1 times [2022-11-23 15:04:40,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:40,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696199175] [2022-11-23 15:04:40,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:40,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:40,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:40,547 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:40,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696199175] [2022-11-23 15:04:40,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696199175] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:40,548 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:40,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:04:40,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851111054] [2022-11-23 15:04:40,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:40,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:04:40,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:40,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:04:40,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:04:40,558 INFO L87 Difference]: Start difference. First operand 4138 states and 14942 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:40,693 INFO L93 Difference]: Finished difference Result 5210 states and 16123 transitions. [2022-11-23 15:04:40,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:04:40,694 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:04:40,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:40,726 INFO L225 Difference]: With dead ends: 5210 [2022-11-23 15:04:40,726 INFO L226 Difference]: Without dead ends: 5170 [2022-11-23 15:04:40,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:04:40,728 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 52 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:40,728 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 42 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:04:40,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5170 states. [2022-11-23 15:04:40,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5170 to 4322. [2022-11-23 15:04:40,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4322 states, 4312 states have (on average 3.206400742115028) internal successors, (13826), 4321 states have internal predecessors, (13826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4322 states to 4322 states and 13826 transitions. [2022-11-23 15:04:40,953 INFO L78 Accepts]: Start accepts. Automaton has 4322 states and 13826 transitions. Word has length 11 [2022-11-23 15:04:40,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:40,954 INFO L495 AbstractCegarLoop]: Abstraction has 4322 states and 13826 transitions. [2022-11-23 15:04:40,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:40,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4322 states and 13826 transitions. [2022-11-23 15:04:40,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:04:40,957 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:40,957 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:40,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:04:40,960 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:40,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:40,961 INFO L85 PathProgramCache]: Analyzing trace with hash -2001892346, now seen corresponding path program 2 times [2022-11-23 15:04:40,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:40,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440527551] [2022-11-23 15:04:40,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:40,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:40,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:41,106 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:41,106 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440527551] [2022-11-23 15:04:41,106 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440527551] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:41,107 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:41,107 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:04:41,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080364797] [2022-11-23 15:04:41,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:41,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:04:41,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:41,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:04:41,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:04:41,109 INFO L87 Difference]: Start difference. First operand 4322 states and 13826 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:41,200 INFO L93 Difference]: Finished difference Result 1474 states and 3500 transitions. [2022-11-23 15:04:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:04:41,200 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2022-11-23 15:04:41,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:41,208 INFO L225 Difference]: With dead ends: 1474 [2022-11-23 15:04:41,208 INFO L226 Difference]: Without dead ends: 1454 [2022-11-23 15:04:41,208 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:04:41,209 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 21 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:41,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:04:41,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-11-23 15:04:41,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1454. [2022-11-23 15:04:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1454 states, 1446 states have (on average 2.395573997233748) internal successors, (3464), 1453 states have internal predecessors, (3464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1454 states to 1454 states and 3464 transitions. [2022-11-23 15:04:41,253 INFO L78 Accepts]: Start accepts. Automaton has 1454 states and 3464 transitions. Word has length 11 [2022-11-23 15:04:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:41,253 INFO L495 AbstractCegarLoop]: Abstraction has 1454 states and 3464 transitions. [2022-11-23 15:04:41,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,254 INFO L276 IsEmpty]: Start isEmpty. Operand 1454 states and 3464 transitions. [2022-11-23 15:04:41,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:04:41,255 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:41,255 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:41,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:04:41,255 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:41,256 INFO L85 PathProgramCache]: Analyzing trace with hash 953182541, now seen corresponding path program 1 times [2022-11-23 15:04:41,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:41,257 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737979371] [2022-11-23 15:04:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:41,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:41,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:41,314 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:41,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737979371] [2022-11-23 15:04:41,315 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737979371] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:41,315 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:41,315 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:04:41,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835577654] [2022-11-23 15:04:41,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:41,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:04:41,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:41,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:04:41,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:04:41,318 INFO L87 Difference]: Start difference. First operand 1454 states and 3464 transitions. Second operand has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:41,636 INFO L93 Difference]: Finished difference Result 1890 states and 4346 transitions. [2022-11-23 15:04:41,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-23 15:04:41,636 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-23 15:04:41,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:41,643 INFO L225 Difference]: With dead ends: 1890 [2022-11-23 15:04:41,643 INFO L226 Difference]: Without dead ends: 1624 [2022-11-23 15:04:41,644 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:04:41,645 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 111 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 292 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:41,645 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [111 Valid, 28 Invalid, 292 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:04:41,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1624 states. [2022-11-23 15:04:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1624 to 1332. [2022-11-23 15:04:41,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1332 states, 1330 states have (on average 2.367669172932331) internal successors, (3149), 1331 states have internal predecessors, (3149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1332 states to 1332 states and 3149 transitions. [2022-11-23 15:04:41,681 INFO L78 Accepts]: Start accepts. Automaton has 1332 states and 3149 transitions. Word has length 13 [2022-11-23 15:04:41,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:41,682 INFO L495 AbstractCegarLoop]: Abstraction has 1332 states and 3149 transitions. [2022-11-23 15:04:41,682 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.25) internal successors, (13), 5 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1332 states and 3149 transitions. [2022-11-23 15:04:41,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:04:41,684 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:41,684 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:41,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:04:41,684 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:41,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:41,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1468188106, now seen corresponding path program 1 times [2022-11-23 15:04:41,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:41,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499652117] [2022-11-23 15:04:41,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:41,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:41,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:41,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:41,749 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:41,750 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499652117] [2022-11-23 15:04:41,750 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499652117] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:41,750 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:41,750 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:04:41,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925617602] [2022-11-23 15:04:41,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:41,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:04:41,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:41,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:04:41,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:04:41,752 INFO L87 Difference]: Start difference. First operand 1332 states and 3149 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:41,979 INFO L93 Difference]: Finished difference Result 1554 states and 3570 transitions. [2022-11-23 15:04:41,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:04:41,980 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 15:04:41,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:41,984 INFO L225 Difference]: With dead ends: 1554 [2022-11-23 15:04:41,984 INFO L226 Difference]: Without dead ends: 1494 [2022-11-23 15:04:41,985 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:04:41,986 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 259 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 259 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:41,986 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 18 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 259 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:04:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2022-11-23 15:04:42,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1166. [2022-11-23 15:04:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1166 states, 1164 states have (on average 2.3539518900343643) internal successors, (2740), 1165 states have internal predecessors, (2740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1166 states to 1166 states and 2740 transitions. [2022-11-23 15:04:42,019 INFO L78 Accepts]: Start accepts. Automaton has 1166 states and 2740 transitions. Word has length 16 [2022-11-23 15:04:42,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:42,020 INFO L495 AbstractCegarLoop]: Abstraction has 1166 states and 2740 transitions. [2022-11-23 15:04:42,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 1166 states and 2740 transitions. [2022-11-23 15:04:42,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:04:42,021 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:42,021 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:42,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:04:42,022 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1453455506, now seen corresponding path program 1 times [2022-11-23 15:04:42,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:42,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246167871] [2022-11-23 15:04:42,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:42,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:42,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:42,081 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:42,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246167871] [2022-11-23 15:04:42,081 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246167871] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:42,081 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:42,081 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:04:42,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640024225] [2022-11-23 15:04:42,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:42,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:04:42,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:42,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:04:42,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:04:42,083 INFO L87 Difference]: Start difference. First operand 1166 states and 2740 transitions. Second operand has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:42,294 INFO L93 Difference]: Finished difference Result 1370 states and 3150 transitions. [2022-11-23 15:04:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:04:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2022-11-23 15:04:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:42,298 INFO L225 Difference]: With dead ends: 1370 [2022-11-23 15:04:42,298 INFO L226 Difference]: Without dead ends: 1254 [2022-11-23 15:04:42,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:04:42,299 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 72 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:42,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 18 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:04:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1254 states. [2022-11-23 15:04:42,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1254 to 928. [2022-11-23 15:04:42,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 926 states have (on average 2.3488120950323976) internal successors, (2175), 927 states have internal predecessors, (2175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2175 transitions. [2022-11-23 15:04:42,337 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2175 transitions. Word has length 16 [2022-11-23 15:04:42,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:42,338 INFO L495 AbstractCegarLoop]: Abstraction has 928 states and 2175 transitions. [2022-11-23 15:04:42,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 4.0) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,338 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2175 transitions. [2022-11-23 15:04:42,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:04:42,340 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:42,340 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:42,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:04:42,341 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:42,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:42,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1766482005, now seen corresponding path program 1 times [2022-11-23 15:04:42,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:42,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30696008] [2022-11-23 15:04:42,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:42,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:42,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:42,495 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:42,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30696008] [2022-11-23 15:04:42,495 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30696008] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:42,495 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:42,495 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:04:42,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48839626] [2022-11-23 15:04:42,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:42,497 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:04:42,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:42,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:04:42,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:04:42,498 INFO L87 Difference]: Start difference. First operand 928 states and 2175 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:42,643 INFO L93 Difference]: Finished difference Result 1048 states and 2433 transitions. [2022-11-23 15:04:42,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:04:42,644 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 15:04:42,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:42,646 INFO L225 Difference]: With dead ends: 1048 [2022-11-23 15:04:42,647 INFO L226 Difference]: Without dead ends: 952 [2022-11-23 15:04:42,647 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:04:42,648 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 59 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:42,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 89 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:04:42,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-11-23 15:04:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 896. [2022-11-23 15:04:42,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 894 states have (on average 2.3031319910514543) internal successors, (2059), 895 states have internal predecessors, (2059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 2059 transitions. [2022-11-23 15:04:42,670 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 2059 transitions. Word has length 22 [2022-11-23 15:04:42,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:42,671 INFO L495 AbstractCegarLoop]: Abstraction has 896 states and 2059 transitions. [2022-11-23 15:04:42,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:42,671 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 2059 transitions. [2022-11-23 15:04:42,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:04:42,673 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:42,673 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:42,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:04:42,674 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:42,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:42,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1116504670, now seen corresponding path program 1 times [2022-11-23 15:04:42,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:42,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571023414] [2022-11-23 15:04:42,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:42,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:42,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:42,799 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:42,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571023414] [2022-11-23 15:04:42,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571023414] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:42,799 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:42,800 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-23 15:04:42,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818079116] [2022-11-23 15:04:42,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:42,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-23 15:04:42,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:42,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-23 15:04:42,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:04:42,801 INFO L87 Difference]: Start difference. First operand 896 states and 2059 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:43,011 INFO L93 Difference]: Finished difference Result 1024 states and 2331 transitions. [2022-11-23 15:04:43,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:04:43,012 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 15:04:43,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:43,014 INFO L225 Difference]: With dead ends: 1024 [2022-11-23 15:04:43,014 INFO L226 Difference]: Without dead ends: 792 [2022-11-23 15:04:43,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-23 15:04:43,025 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 107 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 244 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 244 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:43,026 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 100 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 244 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:04:43,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-11-23 15:04:43,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 736. [2022-11-23 15:04:43,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 734 states have (on average 2.189373297002725) internal successors, (1607), 735 states have internal predecessors, (1607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 1607 transitions. [2022-11-23 15:04:43,043 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 1607 transitions. Word has length 22 [2022-11-23 15:04:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:43,043 INFO L495 AbstractCegarLoop]: Abstraction has 736 states and 1607 transitions. [2022-11-23 15:04:43,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 1607 transitions. [2022-11-23 15:04:43,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:04:43,045 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:43,045 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:43,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:04:43,045 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:43,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:43,046 INFO L85 PathProgramCache]: Analyzing trace with hash 403352044, now seen corresponding path program 2 times [2022-11-23 15:04:43,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:43,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859284984] [2022-11-23 15:04:43,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:43,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:43,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:04:43,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-23 15:04:43,188 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:04:43,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859284984] [2022-11-23 15:04:43,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859284984] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:04:43,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:04:43,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-23 15:04:43,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356893388] [2022-11-23 15:04:43,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:04:43,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-23 15:04:43,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:04:43,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-23 15:04:43,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-23 15:04:43,190 INFO L87 Difference]: Start difference. First operand 736 states and 1607 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:04:43,358 INFO L93 Difference]: Finished difference Result 832 states and 1803 transitions. [2022-11-23 15:04:43,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:04:43,359 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2022-11-23 15:04:43,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:04:43,361 INFO L225 Difference]: With dead ends: 832 [2022-11-23 15:04:43,361 INFO L226 Difference]: Without dead ends: 772 [2022-11-23 15:04:43,361 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-11-23 15:04:43,362 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 103 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:04:43,362 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 57 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:04:43,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 772 states. [2022-11-23 15:04:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 772 to 716. [2022-11-23 15:04:43,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 714 states have (on average 2.1876750700280114) internal successors, (1562), 715 states have internal predecessors, (1562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1562 transitions. [2022-11-23 15:04:43,381 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1562 transitions. Word has length 22 [2022-11-23 15:04:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:04:43,382 INFO L495 AbstractCegarLoop]: Abstraction has 716 states and 1562 transitions. [2022-11-23 15:04:43,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 5 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:04:43,383 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1562 transitions. [2022-11-23 15:04:43,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-11-23 15:04:43,384 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:04:43,384 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:04:43,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-23 15:04:43,385 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting readerErr0ASSERT_VIOLATIONERROR_FUNCTION === [readerErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-23 15:04:43,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:04:43,385 INFO L85 PathProgramCache]: Analyzing trace with hash -2088831814, now seen corresponding path program 3 times [2022-11-23 15:04:43,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:04:43,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480031375] [2022-11-23 15:04:43,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:04:43,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:04:43,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:04:43,406 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-23 15:04:43,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-23 15:04:43,443 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-23 15:04:43,443 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-23 15:04:43,445 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-11-23 15:04:43,446 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-11-23 15:04:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-23 15:04:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-11-23 15:04:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-11-23 15:04:43,447 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 7 remaining) [2022-11-23 15:04:43,448 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-23 15:04:43,448 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-23 15:04:43,450 INFO L444 BasicCegarLoop]: Path program histogram: [3, 2, 1, 1, 1, 1, 1] [2022-11-23 15:04:43,455 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 15:04:43,456 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:04:43,509 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:04:43 BasicIcfg [2022-11-23 15:04:43,509 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:04:43,510 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:04:43,510 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:04:43,510 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:04:43,511 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:04:34" (3/4) ... [2022-11-23 15:04:43,513 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-23 15:04:43,565 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:04:43,566 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:04:43,566 INFO L158 Benchmark]: Toolchain (without parser) took 10351.31ms. Allocated memory was 136.3MB in the beginning and 247.5MB in the end (delta: 111.1MB). Free memory was 71.5MB in the beginning and 100.6MB in the end (delta: -29.1MB). Peak memory consumption was 84.9MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,567 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:04:43,567 INFO L158 Benchmark]: CACSL2BoogieTranslator took 614.59ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 71.3MB in the beginning and 118.7MB in the end (delta: -47.4MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,567 INFO L158 Benchmark]: Boogie Procedure Inliner took 59.67ms. Allocated memory is still 163.6MB. Free memory was 118.7MB in the beginning and 115.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,568 INFO L158 Benchmark]: Boogie Preprocessor took 57.48ms. Allocated memory is still 163.6MB. Free memory was 115.9MB in the beginning and 114.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,568 INFO L158 Benchmark]: RCFGBuilder took 526.78ms. Allocated memory is still 163.6MB. Free memory was 114.5MB in the beginning and 97.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,568 INFO L158 Benchmark]: TraceAbstraction took 9030.60ms. Allocated memory was 163.6MB in the beginning and 247.5MB in the end (delta: 83.9MB). Free memory was 97.1MB in the beginning and 107.9MB in the end (delta: -10.9MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,569 INFO L158 Benchmark]: Witness Printer took 55.82ms. Allocated memory is still 247.5MB. Free memory was 107.9MB in the beginning and 100.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2022-11-23 15:04:43,570 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 136.3MB. Free memory is still 105.2MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 614.59ms. Allocated memory was 136.3MB in the beginning and 163.6MB in the end (delta: 27.3MB). Free memory was 71.3MB in the beginning and 118.7MB in the end (delta: -47.4MB). Peak memory consumption was 14.2MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 59.67ms. Allocated memory is still 163.6MB. Free memory was 118.7MB in the beginning and 115.9MB in the end (delta: 2.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 57.48ms. Allocated memory is still 163.6MB. Free memory was 115.9MB in the beginning and 114.5MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 526.78ms. Allocated memory is still 163.6MB. Free memory was 114.5MB in the beginning and 97.7MB in the end (delta: 16.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * TraceAbstraction took 9030.60ms. Allocated memory was 163.6MB in the beginning and 247.5MB in the end (delta: 83.9MB). Free memory was 97.1MB in the beginning and 107.9MB in the end (delta: -10.9MB). Peak memory consumption was 72.8MB. Max. memory is 16.1GB. * Witness Printer took 55.82ms. Allocated memory is still 247.5MB. Free memory was 107.9MB in the beginning and 100.6MB in the end (delta: 7.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 4.0s, 125 PlacesBefore, 56 PlacesAfterwards, 114 TransitionsBefore, 44 TransitionsAfterwards, 2574 CoEnabledTransitionPairs, 9 FixpointIterations, 34 TrivialSequentialCompositions, 42 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 83 TotalNumberOfCompositions, 12994 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 6733, independent: 6358, independent conditional: 0, independent unconditional: 6358, dependent: 375, dependent conditional: 0, dependent unconditional: 375, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1939, independent: 1887, independent conditional: 0, independent unconditional: 1887, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1939, independent: 1855, independent conditional: 0, independent unconditional: 1855, dependent: 84, dependent conditional: 0, dependent unconditional: 84, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 84, independent: 32, independent conditional: 0, independent unconditional: 32, dependent: 52, dependent conditional: 0, dependent unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 178, independent: 53, independent conditional: 0, independent unconditional: 53, dependent: 125, dependent conditional: 0, dependent unconditional: 125, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 6733, independent: 4471, independent conditional: 0, independent unconditional: 4471, dependent: 323, dependent conditional: 0, dependent unconditional: 323, unknown: 1939, unknown conditional: 0, unknown unconditional: 1939] , Statistics on independence cache: Total cache size (in pairs): 440, Positive cache size: 411, Positive conditional cache size: 0, Positive unconditional cache size: 411, Negative cache size: 29, Negative conditional cache size: 0, Negative unconditional cache size: 29, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 738]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L704] 0 int w=0, r=0, x, y; [L748] 0 pthread_t t1, t2, t3, t4; [L749] FCALL, FORK 0 pthread_create(&t1, 0, writer, 0) VAL [pthread_create(&t1, 0, writer, 0)=-3, r=0, t1={6:0}, t2={8:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L750] FCALL, FORK 0 pthread_create(&t2, 0, reader, 0) VAL [pthread_create(&t2, 0, reader, 0)=-2, r=0, t1={6:0}, t2={8:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L724] 2 int l; [L725] CALL 2 __VERIFIER_atomic_take_read_lock() [L710] CALL 2 assume_abort_if_not(w==0) [L3] COND FALSE 2 !(!cond) [L710] RET 2 assume_abort_if_not(w==0) [L711] 2 r = r+1 [L725] RET 2 __VERIFIER_atomic_take_read_lock() [L751] FCALL, FORK 0 pthread_create(&t3, 0, writer, 0) VAL [pthread_create(&t3, 0, writer, 0)=-1, r=1, t1={6:0}, t2={8:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L752] FCALL, FORK 0 pthread_create(&t4, 0, reader, 0) VAL [pthread_create(&t4, 0, reader, 0)=0, r=1, t1={6:0}, t2={8:0}, t3={7:0}, t4={5:0}, w=0, x=0, y=0] [L727] 2 l = x VAL [#in~arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L730] 2 y = l VAL [#in~arg={0:0}, arg={0:0}, l=0, r=1, w=0, x=0, y=0] [L733] 2 int ly = y; VAL [#in~arg={0:0}, arg={0:0}, l=0, ly=0, r=1, w=0, x=0, y=0] [L736] 2 int lx = x; VAL [#in~arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L738] COND FALSE 2 !(!(ly == lx)) [L740] 2 l = r-1 VAL [#in~arg={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=1, w=0, x=0, y=0] [L724] 4 int l; [L725] CALL 4 __VERIFIER_atomic_take_read_lock() [L710] CALL 4 assume_abort_if_not(w==0) [L3] COND FALSE 4 !(!cond) [L710] RET 4 assume_abort_if_not(w==0) [L711] 4 r = r+1 [L725] RET 4 __VERIFIER_atomic_take_read_lock() [L743] 2 r = l [L745] 2 return 0; [L714] CALL 3 __VERIFIER_atomic_take_write_lock() [L706] CALL 3 assume_abort_if_not(w==0 && r==0) [L3] COND FALSE 3 !(!cond) [L706] RET 3 assume_abort_if_not(w==0 && r==0) [L707] 3 w = 1 [L714] RET 3 __VERIFIER_atomic_take_write_lock() [L727] 4 l = x VAL [#in~arg={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=0, y=0] [L716] 3 x = 3 VAL [#in~arg={0:0}, arg={0:0}, r=0, w=1, x=3, y=0] [L730] 4 y = l VAL [#in~arg={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L733] 4 int ly = y; VAL [#in~arg={0:0}, \result={0:0}, arg={0:0}, l=0, lx=0, ly=0, r=0, w=1, x=3, y=0] [L736] 4 int lx = x; [L738] COND TRUE 4 !(ly == lx) [L738] 4 reach_error() VAL [#in~arg={0:0}, \result={0:0}, arg={0:0}, l=0, lx=3, ly=0, r=0, w=1, x=3, y=0] - UnprovableResult [Line: 749]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 752]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 750]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 751]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 139 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 10, TraceHistogramMax: 1, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 2.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 759 SdHoareTripleChecker+Valid, 1.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 759 mSDsluCounter, 396 SdHoareTripleChecker+Invalid, 1.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 231 mSDsCounter, 47 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1809 IncrementalHoareTripleChecker+Invalid, 1856 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 47 mSolverCounterUnsat, 165 mSDtfsCounter, 1809 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4322occurred in iteration=2, InterpolantAutomatonStates: 61, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.7s AutomataMinimizationTime, 9 MinimizatonAttempts, 4020 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 1.0s InterpolantComputationTime, 164 NumberOfCodeBlocks, 164 NumberOfCodeBlocksAsserted, 10 NumberOfCheckSat, 133 ConstructedInterpolants, 0 QuantifiedInterpolants, 284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 9 InterpolantComputations, 9 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-23 15:04:43,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_0bdd92c1-2918-436f-a3c0-80a764093966/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE