./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e7fbc69 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/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_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/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_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/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 8fab2e995569cc819974baee7d52d8d4bdabd2a2896c83fb3b8d07b44f394c5b --- 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 15:01:00,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-23 15:01:00,535 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-23 15:01:00,570 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-23 15:01:00,570 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-23 15:01:00,571 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-23 15:01:00,572 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-23 15:01:00,574 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-23 15:01:00,576 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-23 15:01:00,577 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-23 15:01:00,578 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-23 15:01:00,579 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-23 15:01:00,579 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-23 15:01:00,586 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-23 15:01:00,589 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-23 15:01:00,592 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-23 15:01:00,594 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-23 15:01:00,599 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-23 15:01:00,602 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-23 15:01:00,608 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-23 15:01:00,611 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-23 15:01:00,614 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-23 15:01:00,616 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-23 15:01:00,617 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-23 15:01:00,622 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-23 15:01:00,623 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-23 15:01:00,623 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-23 15:01:00,624 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-23 15:01:00,624 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-23 15:01:00,625 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-23 15:01:00,625 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-23 15:01:00,626 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-23 15:01:00,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-23 15:01:00,627 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-23 15:01:00,628 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-23 15:01:00,629 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-23 15:01:00,629 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-23 15:01:00,629 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-23 15:01:00,630 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-23 15:01:00,630 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-23 15:01:00,631 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-23 15:01:00,637 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-23 15:01:00,672 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-23 15:01:00,672 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-23 15:01:00,672 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-23 15:01:00,673 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-23 15:01:00,673 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-23 15:01:00,674 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-23 15:01:00,674 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-23 15:01:00,674 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-23 15:01:00,674 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-23 15:01:00,674 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-23 15:01:00,693 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-23 15:01:00,693 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-23 15:01:00,693 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-23 15:01:00,693 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-23 15:01:00,694 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-23 15:01:00,694 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-23 15:01:00,694 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-23 15:01:00,694 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-23 15:01:00,695 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-23 15:01:00,695 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-23 15:01:00,696 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-23 15:01:00,696 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-23 15:01:00,696 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-23 15:01:00,696 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-23 15:01:00,696 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-23 15:01:00,697 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-23 15:01:00,697 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-23 15:01:00,697 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-23 15:01:00,698 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-23 15:01:00,698 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-23 15:01:00,699 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-23 15:01:00,699 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-23 15:01:00,699 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:01:00,699 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-23 15:01:00,700 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-23 15:01:00,700 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-23 15:01:00,701 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-23 15:01:00,701 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-23 15:01:00,702 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-23 15:01:00,702 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-23 15:01:00,702 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-23 15:01:00,703 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_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8fab2e995569cc819974baee7d52d8d4bdabd2a2896c83fb3b8d07b44f394c5b [2022-11-23 15:01:00,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-23 15:01:01,041 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-23 15:01:01,043 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-23 15:01:01,044 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-23 15:01:01,044 INFO L275 PluginConnector]: CDTParser initialized [2022-11-23 15:01:01,045 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/../../sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2022-11-23 15:01:04,022 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-23 15:01:04,353 INFO L351 CDTParser]: Found 1 translation units. [2022-11-23 15:01:04,353 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i [2022-11-23 15:01:04,367 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/data/3b76f55a7/a1d77f24465b4f688c4cafc8892b5bbb/FLAG2fb7b4710 [2022-11-23 15:01:04,395 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/data/3b76f55a7/a1d77f24465b4f688c4cafc8892b5bbb [2022-11-23 15:01:04,398 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-23 15:01:04,399 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-23 15:01:04,401 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-23 15:01:04,401 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-23 15:01:04,405 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-23 15:01:04,405 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:04,407 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31b8c708 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04, skipping insertion in model container [2022-11-23 15:01:04,407 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:04,415 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-23 15:01:04,454 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-23 15:01:04,625 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 15:01:04,801 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_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i[31246,31259] [2022-11-23 15:01:04,825 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:01:04,841 INFO L203 MainTranslator]: Completed pre-run [2022-11-23 15:01:04,877 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-11-23 15:01:04,926 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_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/sv-benchmarks/c/pthread-atomic/read_write_lock-1.i[31246,31259] [2022-11-23 15:01:04,932 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-23 15:01:04,961 INFO L208 MainTranslator]: Completed translation [2022-11-23 15:01:04,962 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04 WrapperNode [2022-11-23 15:01:04,962 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-23 15:01:04,963 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-23 15:01:04,964 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-23 15:01:04,964 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-23 15:01:04,971 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:04,982 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,004 INFO L138 Inliner]: procedures = 175, calls = 46, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 114 [2022-11-23 15:01:05,005 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-23 15:01:05,005 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-23 15:01:05,006 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-23 15:01:05,006 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-23 15:01:05,015 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,016 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,020 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,020 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,025 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,027 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,028 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,030 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,032 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-23 15:01:05,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-23 15:01:05,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-23 15:01:05,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-23 15:01:05,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (1/1) ... [2022-11-23 15:01:05,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-23 15:01:05,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/z3 [2022-11-23 15:01:05,077 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-23 15:01:05,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-23 15:01:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-23 15:01:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-23 15:01:05,111 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-23 15:01:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-23 15:01:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure reader [2022-11-23 15:01:05,112 INFO L138 BoogieDeclarations]: Found implementation of procedure reader [2022-11-23 15:01:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-23 15:01:05,112 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-23 15:01:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-23 15:01:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-23 15:01:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-23 15:01:05,113 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-23 15:01:05,113 INFO L130 BoogieDeclarations]: Found specification of procedure writer [2022-11-23 15:01:05,114 INFO L138 BoogieDeclarations]: Found implementation of procedure writer [2022-11-23 15:01:05,115 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 15:01:05,246 INFO L235 CfgBuilder]: Building ICFG [2022-11-23 15:01:05,248 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-23 15:01:05,530 INFO L276 CfgBuilder]: Performing block encoding [2022-11-23 15:01:05,583 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-23 15:01:05,583 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-11-23 15:01:05,586 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:01:05 BoogieIcfgContainer [2022-11-23 15:01:05,586 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-23 15:01:05,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-23 15:01:05,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-23 15:01:05,593 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-23 15:01:05,593 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 03:01:04" (1/3) ... [2022-11-23 15:01:05,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3812600b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:01:05, skipping insertion in model container [2022-11-23 15:01:05,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 03:01:04" (2/3) ... [2022-11-23 15:01:05,594 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3812600b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 03:01:05, skipping insertion in model container [2022-11-23 15:01:05,594 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:01:05" (3/3) ... [2022-11-23 15:01:05,596 INFO L112 eAbstractionObserver]: Analyzing ICFG read_write_lock-1.i [2022-11-23 15:01:05,606 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-23 15:01:05,619 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-23 15:01:05,619 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-23 15:01:05,619 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-23 15:01:05,747 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-23 15:01:05,798 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-23 15:01:05,812 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 123 places, 112 transitions, 256 flow [2022-11-23 15:01:05,814 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 123 places, 112 transitions, 256 flow [2022-11-23 15:01:05,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 112 transitions, 256 flow [2022-11-23 15:01:05,877 INFO L130 PetriNetUnfolder]: 2/108 cut-off events. [2022-11-23 15:01:05,878 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-23 15:01:05,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 108 events. 2/108 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 89 event pairs, 0 based on Foata normal form. 0/104 useless extension candidates. Maximal degree in co-relation 73. Up to 2 conditions per place. [2022-11-23 15:01:05,886 INFO L119 LiptonReduction]: Number of co-enabled transitions 2408 [2022-11-23 15:01:09,646 INFO L134 LiptonReduction]: Checked pairs total: 9827 [2022-11-23 15:01:09,646 INFO L136 LiptonReduction]: Total number of compositions: 86 [2022-11-23 15:01:09,656 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 54 places, 43 transitions, 118 flow [2022-11-23 15:01:09,850 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 2880 states, 2876 states have (on average 3.8025034770514603) internal successors, (10936), 2879 states have internal predecessors, (10936), 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 15:01:09,870 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-23 15:01:09,877 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;@5b3874a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-23 15:01:09,878 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-23 15:01:09,890 INFO L276 IsEmpty]: Start isEmpty. Operand has 2880 states, 2876 states have (on average 3.8025034770514603) internal successors, (10936), 2879 states have internal predecessors, (10936), 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 15:01:09,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2022-11-23 15:01:09,899 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:09,899 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:09,900 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 15:01:09,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:09,906 INFO L85 PathProgramCache]: Analyzing trace with hash 693813444, now seen corresponding path program 1 times [2022-11-23 15:01:09,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:09,917 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576011379] [2022-11-23 15:01:09,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:09,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:10,406 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 15:01:10,407 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:10,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576011379] [2022-11-23 15:01:10,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576011379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:10,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:10,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:01:10,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142065536] [2022-11-23 15:01:10,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:10,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:01:10,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:10,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:01:10,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:10,451 INFO L87 Difference]: Start difference. First operand has 2880 states, 2876 states have (on average 3.8025034770514603) internal successors, (10936), 2879 states have internal predecessors, (10936), 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 15:01:10,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:10,968 INFO L93 Difference]: Finished difference Result 5964 states and 20648 transitions. [2022-11-23 15:01:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:01:10,971 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 15:01:10,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:11,039 INFO L225 Difference]: With dead ends: 5964 [2022-11-23 15:01:11,039 INFO L226 Difference]: Without dead ends: 5492 [2022-11-23 15:01:11,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:01:11,044 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 121 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:11,046 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 22 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-11-23 15:01:11,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5492 states. [2022-11-23 15:01:11,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5492 to 3566. [2022-11-23 15:01:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3566 states, 3563 states have (on average 3.595846197024979) internal successors, (12812), 3565 states have internal predecessors, (12812), 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 15:01:11,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3566 states to 3566 states and 12812 transitions. [2022-11-23 15:01:11,350 INFO L78 Accepts]: Start accepts. Automaton has 3566 states and 12812 transitions. Word has length 9 [2022-11-23 15:01:11,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:11,352 INFO L495 AbstractCegarLoop]: Abstraction has 3566 states and 12812 transitions. [2022-11-23 15:01:11,355 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 15:01:11,356 INFO L276 IsEmpty]: Start isEmpty. Operand 3566 states and 12812 transitions. [2022-11-23 15:01:11,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:01:11,365 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:11,365 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:11,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-23 15:01:11,366 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 15:01:11,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:11,367 INFO L85 PathProgramCache]: Analyzing trace with hash 493959576, now seen corresponding path program 1 times [2022-11-23 15:01:11,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:11,368 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868650262] [2022-11-23 15:01:11,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:11,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:11,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:11,586 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 15:01:11,586 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:11,586 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868650262] [2022-11-23 15:01:11,587 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868650262] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:11,587 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:11,587 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:01:11,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422902526] [2022-11-23 15:01:11,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:11,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-23 15:01:11,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:11,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-23 15:01:11,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-23 15:01:11,590 INFO L87 Difference]: Start difference. First operand 3566 states and 12812 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 15:01:11,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:11,687 INFO L93 Difference]: Finished difference Result 2868 states and 8845 transitions. [2022-11-23 15:01:11,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-23 15:01:11,688 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 15:01:11,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:11,705 INFO L225 Difference]: With dead ends: 2868 [2022-11-23 15:01:11,706 INFO L226 Difference]: Without dead ends: 2856 [2022-11-23 15:01:11,707 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 15:01:11,710 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 25 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 23 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 15:01:11,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 23 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:01:11,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2856 states. [2022-11-23 15:01:11,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2856 to 2856. [2022-11-23 15:01:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2856 states, 2853 states have (on average 3.0890290921836665) internal successors, (8813), 2855 states have internal predecessors, (8813), 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 15:01:11,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2856 states to 2856 states and 8813 transitions. [2022-11-23 15:01:11,841 INFO L78 Accepts]: Start accepts. Automaton has 2856 states and 8813 transitions. Word has length 11 [2022-11-23 15:01:11,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:11,841 INFO L495 AbstractCegarLoop]: Abstraction has 2856 states and 8813 transitions. [2022-11-23 15:01:11,842 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 15:01:11,842 INFO L276 IsEmpty]: Start isEmpty. Operand 2856 states and 8813 transitions. [2022-11-23 15:01:11,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-23 15:01:11,844 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:11,844 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:11,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-23 15:01:11,847 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 15:01:11,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:11,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1034770544, now seen corresponding path program 2 times [2022-11-23 15:01:11,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:11,852 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502771341] [2022-11-23 15:01:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:11,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:11,986 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 15:01:11,986 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:11,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502771341] [2022-11-23 15:01:11,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502771341] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:11,987 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:11,987 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:01:11,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688840601] [2022-11-23 15:01:11,987 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:01:11,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:11,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:01:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:01:11,989 INFO L87 Difference]: Start difference. First operand 2856 states and 8813 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 15:01:12,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:12,097 INFO L93 Difference]: Finished difference Result 1516 states and 3509 transitions. [2022-11-23 15:01:12,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:01:12,098 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 15:01:12,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:12,105 INFO L225 Difference]: With dead ends: 1516 [2022-11-23 15:01:12,105 INFO L226 Difference]: Without dead ends: 1478 [2022-11-23 15:01:12,106 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 15:01:12,108 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 43 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:12,110 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 36 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:01:12,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1478 states. [2022-11-23 15:01:12,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1478 to 1294. [2022-11-23 15:01:12,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1294 states, 1286 states have (on average 2.394245723172628) internal successors, (3079), 1293 states have internal predecessors, (3079), 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 15:01:12,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1294 states to 1294 states and 3079 transitions. [2022-11-23 15:01:12,151 INFO L78 Accepts]: Start accepts. Automaton has 1294 states and 3079 transitions. Word has length 11 [2022-11-23 15:01:12,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:12,153 INFO L495 AbstractCegarLoop]: Abstraction has 1294 states and 3079 transitions. [2022-11-23 15:01:12,154 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 15:01:12,154 INFO L276 IsEmpty]: Start isEmpty. Operand 1294 states and 3079 transitions. [2022-11-23 15:01:12,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-23 15:01:12,155 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:12,155 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:12,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-23 15:01:12,156 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 15:01:12,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:12,158 INFO L85 PathProgramCache]: Analyzing trace with hash 2090091591, now seen corresponding path program 1 times [2022-11-23 15:01:12,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:12,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115326554] [2022-11-23 15:01:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:12,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:12,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:12,364 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 15:01:12,365 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:12,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115326554] [2022-11-23 15:01:12,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115326554] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:12,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:12,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:01:12,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144035698] [2022-11-23 15:01:12,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:12,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:01:12,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:12,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:01:12,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:12,366 INFO L87 Difference]: Start difference. First operand 1294 states and 3079 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 15:01:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:12,658 INFO L93 Difference]: Finished difference Result 1694 states and 3894 transitions. [2022-11-23 15:01:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-23 15:01:12,658 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 15:01:12,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:12,665 INFO L225 Difference]: With dead ends: 1694 [2022-11-23 15:01:12,665 INFO L226 Difference]: Without dead ends: 1454 [2022-11-23 15:01:12,665 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:01:12,668 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 98 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 232 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:12,669 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 16 Invalid, 232 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:01:12,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2022-11-23 15:01:12,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 1170. [2022-11-23 15:01:12,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1170 states, 1168 states have (on average 2.3690068493150687) internal successors, (2767), 1169 states have internal predecessors, (2767), 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 15:01:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1170 states to 1170 states and 2767 transitions. [2022-11-23 15:01:12,706 INFO L78 Accepts]: Start accepts. Automaton has 1170 states and 2767 transitions. Word has length 13 [2022-11-23 15:01:12,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:12,707 INFO L495 AbstractCegarLoop]: Abstraction has 1170 states and 2767 transitions. [2022-11-23 15:01:12,707 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 15:01:12,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1170 states and 2767 transitions. [2022-11-23 15:01:12,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:01:12,709 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:12,709 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:12,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-23 15:01:12,711 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 15:01:12,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:12,711 INFO L85 PathProgramCache]: Analyzing trace with hash -254218327, now seen corresponding path program 1 times [2022-11-23 15:01:12,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:12,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641634232] [2022-11-23 15:01:12,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:12,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:12,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:12,817 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 15:01:12,817 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:12,818 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641634232] [2022-11-23 15:01:12,818 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641634232] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:12,818 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:12,818 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:01:12,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771233416] [2022-11-23 15:01:12,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:12,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:01:12,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:12,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:01:12,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:12,824 INFO L87 Difference]: Start difference. First operand 1170 states and 2767 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 15:01:13,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:13,093 INFO L93 Difference]: Finished difference Result 1408 states and 3248 transitions. [2022-11-23 15:01:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-23 15:01:13,093 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 15:01:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:13,099 INFO L225 Difference]: With dead ends: 1408 [2022-11-23 15:01:13,099 INFO L226 Difference]: Without dead ends: 1362 [2022-11-23 15:01:13,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-11-23 15:01:13,101 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 86 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:13,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 19 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:01:13,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1362 states. [2022-11-23 15:01:13,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1362 to 1038. [2022-11-23 15:01:13,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1038 states, 1036 states have (on average 2.353281853281853) internal successors, (2438), 1037 states have internal predecessors, (2438), 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 15:01:13,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1038 states to 1038 states and 2438 transitions. [2022-11-23 15:01:13,134 INFO L78 Accepts]: Start accepts. Automaton has 1038 states and 2438 transitions. Word has length 16 [2022-11-23 15:01:13,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:13,134 INFO L495 AbstractCegarLoop]: Abstraction has 1038 states and 2438 transitions. [2022-11-23 15:01:13,134 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 15:01:13,134 INFO L276 IsEmpty]: Start isEmpty. Operand 1038 states and 2438 transitions. [2022-11-23 15:01:13,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-11-23 15:01:13,136 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:13,136 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:13,136 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-23 15:01:13,136 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 15:01:13,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:13,137 INFO L85 PathProgramCache]: Analyzing trace with hash -242195788, now seen corresponding path program 1 times [2022-11-23 15:01:13,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:13,137 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811647798] [2022-11-23 15:01:13,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:13,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:13,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:13,256 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 15:01:13,256 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:13,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811647798] [2022-11-23 15:01:13,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811647798] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:13,257 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:13,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:01:13,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701556000] [2022-11-23 15:01:13,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:13,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:01:13,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:13,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:01:13,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:13,259 INFO L87 Difference]: Start difference. First operand 1038 states and 2438 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 15:01:13,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:13,478 INFO L93 Difference]: Finished difference Result 1258 states and 2893 transitions. [2022-11-23 15:01:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-23 15:01:13,478 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 15:01:13,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:13,483 INFO L225 Difference]: With dead ends: 1258 [2022-11-23 15:01:13,483 INFO L226 Difference]: Without dead ends: 1144 [2022-11-23 15:01:13,483 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-11-23 15:01:13,487 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 79 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:13,487 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 16 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-23 15:01:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1144 states. [2022-11-23 15:01:13,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1144 to 838. [2022-11-23 15:01:13,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 838 states, 836 states have (on average 2.3456937799043063) internal successors, (1961), 837 states have internal predecessors, (1961), 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 15:01:13,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 838 states to 838 states and 1961 transitions. [2022-11-23 15:01:13,516 INFO L78 Accepts]: Start accepts. Automaton has 838 states and 1961 transitions. Word has length 16 [2022-11-23 15:01:13,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:13,517 INFO L495 AbstractCegarLoop]: Abstraction has 838 states and 1961 transitions. [2022-11-23 15:01:13,517 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 15:01:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 838 states and 1961 transitions. [2022-11-23 15:01:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 15:01:13,520 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:13,520 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] [2022-11-23 15:01:13,520 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-23 15:01:13,520 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 15:01:13,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:13,521 INFO L85 PathProgramCache]: Analyzing trace with hash 312011386, now seen corresponding path program 1 times [2022-11-23 15:01:13,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:13,521 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950518434] [2022-11-23 15:01:13,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:13,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:13,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:13,681 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 15:01:13,681 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:13,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950518434] [2022-11-23 15:01:13,684 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950518434] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:13,684 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:13,684 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-23 15:01:13,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071533824] [2022-11-23 15:01:13,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:13,686 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-23 15:01:13,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:13,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-23 15:01:13,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:13,687 INFO L87 Difference]: Start difference. First operand 838 states and 1961 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:13,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:13,785 INFO L93 Difference]: Finished difference Result 966 states and 2201 transitions. [2022-11-23 15:01:13,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-11-23 15:01:13,786 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 15:01:13,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:13,789 INFO L225 Difference]: With dead ends: 966 [2022-11-23 15:01:13,789 INFO L226 Difference]: Without dead ends: 702 [2022-11-23 15:01:13,790 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-11-23 15:01:13,791 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 45 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:13,791 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 57 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-23 15:01:13,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2022-11-23 15:01:13,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 646. [2022-11-23 15:01:13,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 646 states, 644 states have (on average 2.1630434782608696) internal successors, (1393), 645 states have internal predecessors, (1393), 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 15:01:13,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 646 states to 646 states and 1393 transitions. [2022-11-23 15:01:13,816 INFO L78 Accepts]: Start accepts. Automaton has 646 states and 1393 transitions. Word has length 21 [2022-11-23 15:01:13,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:13,817 INFO L495 AbstractCegarLoop]: Abstraction has 646 states and 1393 transitions. [2022-11-23 15:01:13,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:13,817 INFO L276 IsEmpty]: Start isEmpty. Operand 646 states and 1393 transitions. [2022-11-23 15:01:13,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-11-23 15:01:13,821 INFO L187 NwaCegarLoop]: Found error trace [2022-11-23 15:01:13,825 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] [2022-11-23 15:01:13,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-23 15:01:13,825 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 15:01:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-23 15:01:13,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1782655395, now seen corresponding path program 1 times [2022-11-23 15:01:13,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-23 15:01:13,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480770036] [2022-11-23 15:01:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-23 15:01:13,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-23 15:01:13,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-23 15:01:14,008 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 15:01:14,009 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-23 15:01:14,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480770036] [2022-11-23 15:01:14,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480770036] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-23 15:01:14,010 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-23 15:01:14,010 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-23 15:01:14,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488134142] [2022-11-23 15:01:14,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-23 15:01:14,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-23 15:01:14,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-23 15:01:14,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-23 15:01:14,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:01:14,012 INFO L87 Difference]: Start difference. First operand 646 states and 1393 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:14,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-23 15:01:14,062 INFO L93 Difference]: Finished difference Result 278 states and 475 transitions. [2022-11-23 15:01:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-23 15:01:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2022-11-23 15:01:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-23 15:01:14,064 INFO L225 Difference]: With dead ends: 278 [2022-11-23 15:01:14,064 INFO L226 Difference]: Without dead ends: 0 [2022-11-23 15:01:14,064 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-11-23 15:01:14,066 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 29 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 11 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-11-23 15:01:14,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 11 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-11-23 15:01:14,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-11-23 15:01:14,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-11-23 15:01:14,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 15:01:14,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-11-23 15:01:14,068 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 21 [2022-11-23 15:01:14,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-23 15:01:14,068 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-11-23 15:01:14,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-23 15:01:14,069 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-11-23 15:01:14,069 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-11-23 15:01:14,073 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (6 of 7 remaining) [2022-11-23 15:01:14,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 7 remaining) [2022-11-23 15:01:14,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 7 remaining) [2022-11-23 15:01:14,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 7 remaining) [2022-11-23 15:01:14,074 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 7 remaining) [2022-11-23 15:01:14,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-11-23 15:01:14,075 INFO L805 garLoopResultBuilder]: Registering result SAFE for location readerErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-11-23 15:01:14,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-23 15:01:14,077 INFO L444 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2022-11-23 15:01:14,082 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-23 15:01:14,083 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-23 15:01:14,087 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 03:01:14 BasicIcfg [2022-11-23 15:01:14,087 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-23 15:01:14,087 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-23 15:01:14,088 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-23 15:01:14,088 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-23 15:01:14,088 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 03:01:05" (3/4) ... [2022-11-23 15:01:14,091 INFO L137 WitnessPrinter]: Generating witness for correct program [2022-11-23 15:01:14,096 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure reader [2022-11-23 15:01:14,097 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure writer [2022-11-23 15:01:14,102 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 21 nodes and edges [2022-11-23 15:01:14,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2022-11-23 15:01:14,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2022-11-23 15:01:14,103 INFO L915 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2022-11-23 15:01:14,141 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/bin/utaipan-Q6hlc19bkW/witness.graphml [2022-11-23 15:01:14,141 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-23 15:01:14,142 INFO L158 Benchmark]: Toolchain (without parser) took 9742.69ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 142.7MB in the beginning and 165.0MB in the end (delta: -22.4MB). Peak memory consumption was 84.9MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,142 INFO L158 Benchmark]: CDTParser took 0.17ms. Allocated memory is still 176.2MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-23 15:01:14,142 INFO L158 Benchmark]: CACSL2BoogieTranslator took 562.10ms. Allocated memory is still 176.2MB. Free memory was 142.3MB in the beginning and 122.6MB in the end (delta: 19.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,143 INFO L158 Benchmark]: Boogie Procedure Inliner took 41.53ms. Allocated memory is still 176.2MB. Free memory was 122.2MB in the beginning and 120.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,143 INFO L158 Benchmark]: Boogie Preprocessor took 26.82ms. Allocated memory is still 176.2MB. Free memory was 120.1MB in the beginning and 118.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,143 INFO L158 Benchmark]: RCFGBuilder took 553.28ms. Allocated memory is still 176.2MB. Free memory was 118.4MB in the beginning and 102.0MB in the end (delta: 16.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,144 INFO L158 Benchmark]: TraceAbstraction took 8498.43ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 101.2MB in the beginning and 168.2MB in the end (delta: -66.9MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,144 INFO L158 Benchmark]: Witness Printer took 53.58ms. Allocated memory is still 278.9MB. Free memory was 168.2MB in the beginning and 165.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-11-23 15:01:14,147 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17ms. Allocated memory is still 176.2MB. Free memory is still 145.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 562.10ms. Allocated memory is still 176.2MB. Free memory was 142.3MB in the beginning and 122.6MB in the end (delta: 19.6MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 41.53ms. Allocated memory is still 176.2MB. Free memory was 122.2MB in the beginning and 120.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.82ms. Allocated memory is still 176.2MB. Free memory was 120.1MB in the beginning and 118.4MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 553.28ms. Allocated memory is still 176.2MB. Free memory was 118.4MB in the beginning and 102.0MB in the end (delta: 16.4MB). Peak memory consumption was 14.7MB. Max. memory is 16.1GB. * TraceAbstraction took 8498.43ms. Allocated memory was 176.2MB in the beginning and 278.9MB in the end (delta: 102.8MB). Free memory was 101.2MB in the beginning and 168.2MB in the end (delta: -66.9MB). Peak memory consumption was 36.6MB. Max. memory is 16.1GB. * Witness Printer took 53.58ms. Allocated memory is still 278.9MB. Free memory was 168.2MB in the beginning and 165.0MB in the end (delta: 3.1MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.8s, 123 PlacesBefore, 54 PlacesAfterwards, 112 TransitionsBefore, 43 TransitionsAfterwards, 2408 CoEnabledTransitionPairs, 7 FixpointIterations, 34 TrivialSequentialCompositions, 47 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 0 ChoiceCompositions, 86 TotalNumberOfCompositions, 9827 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 5420, independent: 5159, independent conditional: 0, independent unconditional: 5159, dependent: 261, dependent conditional: 0, dependent unconditional: 261, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 1902, independent: 1856, independent conditional: 0, independent unconditional: 1856, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 1902, independent: 1806, independent conditional: 0, independent unconditional: 1806, dependent: 96, dependent conditional: 0, dependent unconditional: 96, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 96, independent: 50, independent conditional: 0, independent unconditional: 50, dependent: 46, dependent conditional: 0, dependent unconditional: 46, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 215, independent: 91, independent conditional: 0, independent unconditional: 91, dependent: 124, dependent conditional: 0, dependent unconditional: 124, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 5420, independent: 3303, independent conditional: 0, independent unconditional: 3303, dependent: 215, dependent conditional: 0, dependent unconditional: 215, unknown: 1902, unknown conditional: 0, unknown unconditional: 1902] , Statistics on independence cache: Total cache size (in pairs): 380, Positive cache size: 354, Positive conditional cache size: 0, Positive unconditional cache size: 354, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26, 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 - PositiveResult [Line: 739]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 136 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 8.3s, OverallIterations: 8, TraceHistogramMax: 1, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 526 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 526 mSDsluCounter, 200 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 91 mSDsCounter, 28 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1321 IncrementalHoareTripleChecker+Invalid, 1349 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 28 mSolverCounterUnsat, 109 mSDtfsCounter, 1321 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3566occurred in iteration=1, InterpolantAutomatonStates: 45, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 8 MinimizatonAttempts, 3080 StatesRemovedByMinimization, 6 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.2s InterpolantComputationTime, 118 NumberOfCodeBlocks, 118 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 110 ConstructedInterpolants, 0 QuantifiedInterpolants, 278 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2022-11-23 15:01:14,181 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7eab8d68-02a3-4ffa-9a79-1d4ae4195aeb/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 Result: TRUE