./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/ldv-races/race-1_2-join.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/ldv-races/race-1_2-join.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh --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 fd4c3d19582748238e9ca587d159d6e8fc23db581cd4de03be73dc785992e03f --- 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-2329fc7 [2022-12-14 07:46:51,669 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:46:51,671 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:46:51,684 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:46:51,684 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:46:51,685 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:46:51,686 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:46:51,687 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:46:51,688 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:46:51,689 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:46:51,689 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:46:51,690 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:46:51,690 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:46:51,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:46:51,691 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:46:51,692 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:46:51,693 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:46:51,693 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:46:51,694 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:46:51,695 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:46:51,696 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:46:51,697 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:46:51,698 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:46:51,698 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:46:51,700 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:46:51,701 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:46:51,701 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:46:51,701 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:46:51,702 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:46:51,702 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:46:51,703 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:46:51,703 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:46:51,704 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:46:51,704 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:46:51,705 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:46:51,705 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:46:51,705 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:46:51,705 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:46:51,706 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:46:51,706 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:46:51,707 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:46:51,707 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:46:51,722 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:46:51,722 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:46:51,722 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:46:51,722 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:46:51,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:46:51,730 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:46:51,730 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:46:51,730 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:46:51,730 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:46:51,731 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:46:51,731 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:46:51,731 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:46:51,731 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:46:51,732 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:46:51,732 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:46:51,732 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:46:51,732 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:46:51,733 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:46:51,733 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:46:51,734 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:46:51,734 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:46:51,734 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:46:51,734 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:46:51,735 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:46:51,735 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:46:51,735 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:46:51,735 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:46:51,736 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:46:51,736 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:46:51,736 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:46:51,736 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:46:51,737 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:46:51,737 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:46:51,737 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:46:51,737 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:46:51,737 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:46:51,737 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:46:51,738 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:46:51,738 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:46:51,738 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:46:51,738 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:46:51,738 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_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> fd4c3d19582748238e9ca587d159d6e8fc23db581cd4de03be73dc785992e03f [2022-12-14 07:46:51,932 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:46:51,948 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:46:51,950 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:46:51,951 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:46:51,952 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:46:51,953 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/ldv-races/race-1_2-join.i [2022-12-14 07:46:54,467 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:46:54,686 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:46:54,686 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/sv-benchmarks/c/ldv-races/race-1_2-join.i [2022-12-14 07:46:54,699 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/data/1db41b612/49163cb1429a4e14b77332d29e662e46/FLAG28facf5e6 [2022-12-14 07:46:55,062 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/data/1db41b612/49163cb1429a4e14b77332d29e662e46 [2022-12-14 07:46:55,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:46:55,072 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:46:55,075 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:46:55,076 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:46:55,084 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:46:55,085 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,087 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a252e46 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55, skipping insertion in model container [2022-12-14 07:46:55,087 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,098 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:46:55,132 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:46:55,638 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_918c7931-2f17-4745-a563-6e96bf64bdca/sv-benchmarks/c/ldv-races/race-1_2-join.i[76153,76166] [2022-12-14 07:46:55,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,643 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,653 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,654 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,658 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:46:55,668 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:46:55,704 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_918c7931-2f17-4745-a563-6e96bf64bdca/sv-benchmarks/c/ldv-races/race-1_2-join.i[76153,76166] [2022-12-14 07:46:55,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,705 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,708 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_begin [2022-12-14 07:46:55,709 WARN L623 FunctionHandler]: Unknown extern function __VERIFIER_atomic_end [2022-12-14 07:46:55,711 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:46:55,842 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:46:55,842 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55 WrapperNode [2022-12-14 07:46:55,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:46:55,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:46:55,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:46:55,844 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:46:55,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,875 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,899 INFO L138 Inliner]: procedures = 482, calls = 33, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 89 [2022-12-14 07:46:55,900 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:46:55,900 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:46:55,900 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:46:55,900 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:46:55,910 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,910 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,915 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,915 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,924 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,926 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,930 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,932 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,937 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:46:55,938 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:46:55,938 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:46:55,938 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:46:55,939 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (1/1) ... [2022-12-14 07:46:55,945 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:46:55,954 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:46:55,965 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:46:55,967 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-12-14 07:46:56,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:46:56,002 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:46:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:46:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-12-14 07:46:56,003 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-12-14 07:46:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:46:56,003 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:46:56,004 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-14 07:46:56,223 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:46:56,225 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:46:56,364 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:46:56,385 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:46:56,386 INFO L300 CfgBuilder]: Removed 0 assume(true) statements. [2022-12-14 07:46:56,388 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:46:56 BoogieIcfgContainer [2022-12-14 07:46:56,388 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:46:56,389 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:46:56,390 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:46:56,392 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:46:56,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:46:55" (1/3) ... [2022-12-14 07:46:56,393 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4183111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:46:56, skipping insertion in model container [2022-12-14 07:46:56,393 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:46:55" (2/3) ... [2022-12-14 07:46:56,394 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4183111d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:46:56, skipping insertion in model container [2022-12-14 07:46:56,394 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:46:56" (3/3) ... [2022-12-14 07:46:56,395 INFO L112 eAbstractionObserver]: Analyzing ICFG race-1_2-join.i [2022-12-14 07:46:56,402 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 07:46:56,411 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:46:56,411 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 4 error locations. [2022-12-14 07:46:56,411 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:46:56,448 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-14 07:46:56,477 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:46:56,490 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 105 places, 106 transitions, 220 flow [2022-12-14 07:46:56,493 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 105 places, 106 transitions, 220 flow [2022-12-14 07:46:56,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 106 transitions, 220 flow [2022-12-14 07:46:56,542 INFO L130 PetriNetUnfolder]: 4/120 cut-off events. [2022-12-14 07:46:56,542 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-14 07:46:56,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125 conditions, 120 events. 4/120 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 161 event pairs, 0 based on Foata normal form. 0/110 useless extension candidates. Maximal degree in co-relation 73. Up to 3 conditions per place. [2022-12-14 07:46:56,547 INFO L119 LiptonReduction]: Number of co-enabled transitions 294 [2022-12-14 07:46:59,730 INFO L134 LiptonReduction]: Checked pairs total: 352 [2022-12-14 07:46:59,730 INFO L136 LiptonReduction]: Total number of compositions: 128 [2022-12-14 07:46:59,737 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 17 places, 15 transitions, 38 flow [2022-12-14 07:46:59,744 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-12-14 07:46:59,756 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:46:59,760 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;@7fd6498e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:46:59,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 07:46:59,761 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 19 states have internal predecessors, (24), 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) [2022-12-14 07:46:59,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 2 [2022-12-14 07:46:59,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:46:59,765 INFO L195 NwaCegarLoop]: trace histogram [1] [2022-12-14 07:46:59,765 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:46:59,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:46:59,769 INFO L85 PathProgramCache]: Analyzing trace with hash 425, now seen corresponding path program 1 times [2022-12-14 07:46:59,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:46:59,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124897001] [2022-12-14 07:46:59,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:46:59,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:46:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:46:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:46:59,917 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:46:59,917 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124897001] [2022-12-14 07:46:59,917 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124897001] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:46:59,917 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:46:59,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [0] imperfect sequences [] total 0 [2022-12-14 07:46:59,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376330652] [2022-12-14 07:46:59,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:46:59,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-14 07:46:59,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:46:59,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-14 07:46:59,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:46:59,942 INFO L87 Difference]: Start difference. First operand has 20 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 07:46:59,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:46:59,964 INFO L93 Difference]: Finished difference Result 17 states and 21 transitions. [2022-12-14 07:46:59,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-14 07:46:59,966 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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 1 [2022-12-14 07:46:59,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:46:59,971 INFO L225 Difference]: With dead ends: 17 [2022-12-14 07:46:59,971 INFO L226 Difference]: Without dead ends: 8 [2022-12-14 07:46:59,972 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 0 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-14 07:46:59,974 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:46:59,975 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:46:59,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2022-12-14 07:46:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2022-12-14 07:46:59,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.2857142857142858) internal successors, (9), 7 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) [2022-12-14 07:46:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 9 transitions. [2022-12-14 07:46:59,995 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 9 transitions. Word has length 1 [2022-12-14 07:46:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:46:59,995 INFO L495 AbstractCegarLoop]: Abstraction has 8 states and 9 transitions. [2022-12-14 07:46:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 1 states have (on average 1.0) internal successors, (1), 1 states have internal predecessors, (1), 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) [2022-12-14 07:46:59,996 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 9 transitions. [2022-12-14 07:46:59,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2022-12-14 07:46:59,996 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:46:59,996 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1] [2022-12-14 07:46:59,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:46:59,997 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:46:59,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:46:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash 13051895, now seen corresponding path program 1 times [2022-12-14 07:46:59,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:46:59,998 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629479793] [2022-12-14 07:46:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:46:59,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:00,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:47:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-14 07:47:00,161 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:47:00,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629479793] [2022-12-14 07:47:00,161 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629479793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:47:00,161 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:47:00,161 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:47:00,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732311498] [2022-12-14 07:47:00,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:47:00,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:47:00,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:47:00,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:47:00,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:00,163 INFO L87 Difference]: Start difference. First operand 8 states and 9 transitions. Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:47:00,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:47:00,174 INFO L93 Difference]: Finished difference Result 8 states and 7 transitions. [2022-12-14 07:47:00,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:47:00,175 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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 4 [2022-12-14 07:47:00,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:47:00,175 INFO L225 Difference]: With dead ends: 8 [2022-12-14 07:47:00,175 INFO L226 Difference]: Without dead ends: 6 [2022-12-14 07:47:00,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:47:00,176 INFO L413 NwaCegarLoop]: 0 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 0 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-12-14 07:47:00,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 0 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-12-14 07:47:00,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6 states. [2022-12-14 07:47:00,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6 to 6. [2022-12-14 07:47:00,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6 states, 5 states have (on average 1.0) internal successors, (5), 5 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-14 07:47:00,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 5 transitions. [2022-12-14 07:47:00,178 INFO L78 Accepts]: Start accepts. Automaton has 6 states and 5 transitions. Word has length 4 [2022-12-14 07:47:00,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:47:00,178 INFO L495 AbstractCegarLoop]: Abstraction has 6 states and 5 transitions. [2022-12-14 07:47:00,178 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 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) [2022-12-14 07:47:00,179 INFO L276 IsEmpty]: Start isEmpty. Operand 6 states and 5 transitions. [2022-12-14 07:47:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-12-14 07:47:00,179 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:47:00,179 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-12-14 07:47:00,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:47:00,179 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-14 07:47:00,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:47:00,180 INFO L85 PathProgramCache]: Analyzing trace with hash 404615158, now seen corresponding path program 1 times [2022-12-14 07:47:00,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:47:00,180 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866288112] [2022-12-14 07:47:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:47:00,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:47:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:00,205 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:47:00,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:47:00,236 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:47:00,236 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:47:00,237 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION (4 of 5 remaining) [2022-12-14 07:47:00,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-14 07:47:00,239 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 07:47:00,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 07:47:00,240 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 5 remaining) [2022-12-14 07:47:00,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:47:00,241 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-14 07:47:00,245 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-12-14 07:47:00,245 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-12-14 07:47:00,258 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.12 07:47:00 BasicIcfg [2022-12-14 07:47:00,258 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-12-14 07:47:00,258 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-12-14 07:47:00,258 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-12-14 07:47:00,258 INFO L275 PluginConnector]: Witness Printer initialized [2022-12-14 07:47:00,259 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:46:56" (3/4) ... [2022-12-14 07:47:00,260 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-12-14 07:47:00,284 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/witness.graphml [2022-12-14 07:47:00,284 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-12-14 07:47:00,285 INFO L158 Benchmark]: Toolchain (without parser) took 5213.57ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 92.5MB in the beginning and 115.9MB in the end (delta: -23.4MB). Peak memory consumption was 5.3MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,285 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. [2022-12-14 07:47:00,286 INFO L158 Benchmark]: CACSL2BoogieTranslator took 767.47ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 92.5MB in the beginning and 120.5MB in the end (delta: -28.0MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,286 INFO L158 Benchmark]: Boogie Procedure Inliner took 56.03ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 117.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,286 INFO L158 Benchmark]: Boogie Preprocessor took 36.93ms. Allocated memory is still 157.3MB. Free memory was 117.5MB in the beginning and 114.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,286 INFO L158 Benchmark]: RCFGBuilder took 450.02ms. Allocated memory is still 157.3MB. Free memory was 114.6MB in the beginning and 93.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,287 INFO L158 Benchmark]: TraceAbstraction took 3868.50ms. Allocated memory is still 157.3MB. Free memory was 93.3MB in the beginning and 118.0MB in the end (delta: -24.7MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,287 INFO L158 Benchmark]: Witness Printer took 26.29ms. Allocated memory is still 157.3MB. Free memory was 118.0MB in the beginning and 115.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-12-14 07:47:00,290 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 130.0MB. Free memory is still 100.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 767.47ms. Allocated memory was 130.0MB in the beginning and 157.3MB in the end (delta: 27.3MB). Free memory was 92.5MB in the beginning and 120.5MB in the end (delta: -28.0MB). Peak memory consumption was 62.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 56.03ms. Allocated memory is still 157.3MB. Free memory was 120.5MB in the beginning and 117.5MB in the end (delta: 3.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 36.93ms. Allocated memory is still 157.3MB. Free memory was 117.5MB in the beginning and 114.6MB in the end (delta: 2.9MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 450.02ms. Allocated memory is still 157.3MB. Free memory was 114.6MB in the beginning and 93.6MB in the end (delta: 21.0MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 3868.50ms. Allocated memory is still 157.3MB. Free memory was 93.3MB in the beginning and 118.0MB in the end (delta: -24.7MB). Peak memory consumption was 58.1MB. Max. memory is 16.1GB. * Witness Printer took 26.29ms. Allocated memory is still 157.3MB. Free memory was 118.0MB in the beginning and 115.9MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3.2s, 105 PlacesBefore, 17 PlacesAfterwards, 106 TransitionsBefore, 15 TransitionsAfterwards, 294 CoEnabledTransitionPairs, 7 FixpointIterations, 85 TrivialSequentialCompositions, 21 ConcurrentSequentialCompositions, 10 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 128 TotalNumberOfCompositions, 352 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 294, independent: 269, independent conditional: 0, independent unconditional: 269, dependent: 25, dependent conditional: 0, dependent unconditional: 25, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 214, independent: 199, independent conditional: 0, independent unconditional: 199, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 214, independent: 198, independent conditional: 0, independent unconditional: 198, dependent: 16, dependent conditional: 0, dependent unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 16, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 15, dependent conditional: 0, dependent unconditional: 15, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 31, independent: 1, independent conditional: 0, independent unconditional: 1, dependent: 29, dependent conditional: 0, dependent unconditional: 29, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 294, independent: 70, independent conditional: 0, independent unconditional: 70, dependent: 10, dependent conditional: 0, dependent unconditional: 10, unknown: 214, unknown conditional: 0, unknown unconditional: 214] , Statistics on independence cache: Total cache size (in pairs): 4, Positive cache size: 1, Positive conditional cache size: 0, Positive unconditional cache size: 1, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Unknown cache size: 0, Unknown conditional cache size: 0, Unknown unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 1695]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L1696] 0 pthread_t t1; [L1697] 0 pthread_mutex_t mutex; [L1698] 0 int pdev; [L1734] CALL 0 module_init() [L1709] 0 pdev = 1 [L1710] CALL 0 ldv_assert(pdev==1) [L1695] COND FALSE 0 !(!expression) [L1710] RET 0 ldv_assert(pdev==1) [L1711] COND TRUE 0 __VERIFIER_nondet_int() [L1712] FCALL, FORK 0 pthread_create(&t1, ((void *)0), thread1, ((void *)0)) VAL [arg={0:0}, mutex={4:0}, pdev=1, pthread_create(&t1, ((void *)0), thread1, ((void *)0))=-1, t1={3:0}] [L1714] 0 pdev = 2 VAL [arg={0:0}, mutex={4:0}, pdev=2, t1={3:0}] [L1702] 1 pdev = 6 [L1705] 1 return 0; [L1717] CALL 0 ldv_assert(pdev==2) [L1695] COND TRUE 0 !expression [L1695] 0 reach_error() VAL [\old(expression)=0, \result={0:0}, arg={0:0}, arg={0:0}, expression=0, mutex={4:0}, pdev=6, t1={3:0}] - UnprovableResult [Line: 1695]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1695]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1695]: Unable to prove that call to reach_error is unreachable Unable to prove that call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 1712]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 111 locations, 5 error locations. Started 1 CEGAR loops. OverallTime: 3.8s, OverallIterations: 3, TraceHistogramMax: 1, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 0.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.3s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 0 SdHoareTripleChecker+Valid, 0.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 0 mSDsluCounter, 0 SdHoareTripleChecker+Invalid, 0.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 0 mSDsCounter, 0 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 21 IncrementalHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 0 mSolverCounterUnsat, 0 mSDtfsCounter, 21 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=20occurred in iteration=0, InterpolantAutomatonStates: 5, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 2 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.0s SatisfiabilityAnalysisTime, 0.1s InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 3 NumberOfCheckSat, 3 ConstructedInterpolants, 0 QuantifiedInterpolants, 5 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 2 InterpolantComputations, 2 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-12-14 07:47:00,306 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_918c7931-2f17-4745-a563-6e96bf64bdca/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE