./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/twostage_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 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_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/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_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/config/TaipanReach.xml -i ../../sv-benchmarks/c/pthread/twostage_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/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_30894cc0-86df-4f27-80ee-57c5ac6982bf/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 c1c75e051173a22f60f33f26eab32e0b3a7dcaf46f2d4cc494d0c9d8775c984e --- 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 07:53:35,012 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-14 07:53:35,014 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-14 07:53:35,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-14 07:53:35,032 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-14 07:53:35,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-14 07:53:35,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-14 07:53:35,036 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-14 07:53:35,037 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-14 07:53:35,038 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-14 07:53:35,039 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-14 07:53:35,040 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-14 07:53:35,040 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-14 07:53:35,041 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-14 07:53:35,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-14 07:53:35,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-14 07:53:35,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-14 07:53:35,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-14 07:53:35,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-14 07:53:35,048 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-14 07:53:35,050 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-14 07:53:35,051 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-14 07:53:35,052 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-14 07:53:35,053 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-14 07:53:35,056 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-14 07:53:35,056 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-14 07:53:35,057 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-14 07:53:35,057 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-14 07:53:35,058 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-14 07:53:35,059 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-14 07:53:35,059 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-14 07:53:35,060 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-14 07:53:35,060 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-14 07:53:35,061 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-14 07:53:35,062 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-14 07:53:35,062 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-14 07:53:35,063 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-14 07:53:35,063 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-14 07:53:35,063 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-14 07:53:35,064 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-14 07:53:35,065 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-14 07:53:35,065 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-12-14 07:53:35,079 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-14 07:53:35,079 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-14 07:53:35,079 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-14 07:53:35,079 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-14 07:53:35,080 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * User list type=DISABLED [2022-12-14 07:53:35,080 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Explicit value domain=true [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Octagon Domain=false [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-12-14 07:53:35,080 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-12-14 07:53:35,081 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-12-14 07:53:35,081 INFO L138 SettingsManager]: * Interval Domain=false [2022-12-14 07:53:35,081 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-12-14 07:53:35,081 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-12-14 07:53:35,081 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-12-14 07:53:35,081 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-14 07:53:35,082 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-14 07:53:35,083 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:53:35,083 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-14 07:53:35,083 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-14 07:53:35,084 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-12-14 07:53:35,084 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_30894cc0-86df-4f27-80ee-57c5ac6982bf/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c1c75e051173a22f60f33f26eab32e0b3a7dcaf46f2d4cc494d0c9d8775c984e [2022-12-14 07:53:35,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-14 07:53:35,282 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-14 07:53:35,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-14 07:53:35,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-14 07:53:35,286 INFO L275 PluginConnector]: CDTParser initialized [2022-12-14 07:53:35,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/../../sv-benchmarks/c/pthread/twostage_3.i [2022-12-14 07:53:37,926 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-14 07:53:38,137 INFO L351 CDTParser]: Found 1 translation units. [2022-12-14 07:53:38,137 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/sv-benchmarks/c/pthread/twostage_3.i [2022-12-14 07:53:38,150 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/data/851fd6671/3e4bc31ca48045c2bd13ab916c454a6a/FLAG1ff45eac2 [2022-12-14 07:53:38,518 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/data/851fd6671/3e4bc31ca48045c2bd13ab916c454a6a [2022-12-14 07:53:38,525 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-14 07:53:38,528 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-14 07:53:38,532 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:38,532 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-14 07:53:38,541 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-14 07:53:38,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:38" (1/1) ... [2022-12-14 07:53:38,544 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78bbf9c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:38, skipping insertion in model container [2022-12-14 07:53:38,545 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.12 07:53:38" (1/1) ... [2022-12-14 07:53:38,557 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-14 07:53:38,595 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-14 07:53:39,015 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,016 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_30894cc0-86df-4f27-80ee-57c5ac6982bf/sv-benchmarks/c/pthread/twostage_3.i[58991,59004] [2022-12-14 07:53:39,020 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,023 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,023 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,026 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,028 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,030 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,031 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,032 WARN L1576 CHandler]: Possible shadowing of function lock [2022-12-14 07:53:39,033 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,033 WARN L1576 CHandler]: Possible shadowing of function lock [2022-12-14 07:53:39,034 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,034 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:39,041 INFO L203 MainTranslator]: Completed pre-run [2022-12-14 07:53:39,071 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,071 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_30894cc0-86df-4f27-80ee-57c5ac6982bf/sv-benchmarks/c/pthread/twostage_3.i[58991,59004] [2022-12-14 07:53:39,072 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,074 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,074 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,076 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,077 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,078 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,079 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,080 WARN L1576 CHandler]: Possible shadowing of function lock [2022-12-14 07:53:39,081 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,081 WARN L1576 CHandler]: Possible shadowing of function lock [2022-12-14 07:53:39,082 WARN L623 FunctionHandler]: Unknown extern function fprintf [2022-12-14 07:53:39,082 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-14 07:53:39,127 INFO L208 MainTranslator]: Completed translation [2022-12-14 07:53:39,128 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39 WrapperNode [2022-12-14 07:53:39,128 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-14 07:53:39,129 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-14 07:53:39,129 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-14 07:53:39,129 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-14 07:53:39,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,147 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,171 INFO L138 Inliner]: procedures = 372, calls = 49, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 170 [2022-12-14 07:53:39,172 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-14 07:53:39,172 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-14 07:53:39,172 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-14 07:53:39,172 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-14 07:53:39,179 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,179 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,181 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,182 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,186 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,201 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,203 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,206 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-14 07:53:39,207 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-14 07:53:39,208 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-14 07:53:39,208 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-14 07:53:39,209 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (1/1) ... [2022-12-14 07:53:39,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-14 07:53:39,227 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/z3 [2022-12-14 07:53:39,239 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-14 07:53:39,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_30894cc0-86df-4f27-80ee-57c5ac6982bf/bin/utaipan-gh47qXpMRh/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-14 07:53:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure funcA [2022-12-14 07:53:39,274 INFO L138 BoogieDeclarations]: Found implementation of procedure funcA [2022-12-14 07:53:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure funcB [2022-12-14 07:53:39,274 INFO L138 BoogieDeclarations]: Found implementation of procedure funcB [2022-12-14 07:53:39,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-14 07:53:39,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-14 07:53:39,276 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-14 07:53:39,276 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-14 07:53:39,277 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 07:53:39,399 INFO L235 CfgBuilder]: Building ICFG [2022-12-14 07:53:39,401 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-14 07:53:39,616 INFO L276 CfgBuilder]: Performing block encoding [2022-12-14 07:53:39,626 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-14 07:53:39,626 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-12-14 07:53:39,628 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:53:39 BoogieIcfgContainer [2022-12-14 07:53:39,629 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-14 07:53:39,632 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-14 07:53:39,632 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-14 07:53:39,635 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-14 07:53:39,635 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.12 07:53:38" (1/3) ... [2022-12-14 07:53:39,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578f27c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:53:39, skipping insertion in model container [2022-12-14 07:53:39,636 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.12 07:53:39" (2/3) ... [2022-12-14 07:53:39,636 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@578f27c4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.12 07:53:39, skipping insertion in model container [2022-12-14 07:53:39,637 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.12 07:53:39" (3/3) ... [2022-12-14 07:53:39,638 INFO L112 eAbstractionObserver]: Analyzing ICFG twostage_3.i [2022-12-14 07:53:39,647 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-14 07:53:39,658 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-14 07:53:39,658 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-14 07:53:39,658 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-14 07:53:39,714 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-14 07:53:39,745 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:53:39,760 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 201 places, 216 transitions, 454 flow [2022-12-14 07:53:39,763 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 201 places, 216 transitions, 454 flow [2022-12-14 07:53:39,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 201 places, 216 transitions, 454 flow [2022-12-14 07:53:39,864 INFO L130 PetriNetUnfolder]: 41/406 cut-off events. [2022-12-14 07:53:39,864 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-12-14 07:53:39,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 426 conditions, 406 events. 41/406 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1425 event pairs, 0 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 227. Up to 8 conditions per place. [2022-12-14 07:53:39,876 INFO L119 LiptonReduction]: Number of co-enabled transitions 5658 [2022-12-14 07:53:53,828 WARN L233 SmtUtils]: Spent 5.46s on a formula simplification. DAG size of input: 273 DAG size of output: 269 (called from [L 278] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.cfg.transitions.TransFormulaUtils.sequentialComposition) [2022-12-14 07:53:54,300 INFO L134 LiptonReduction]: Checked pairs total: 13617 [2022-12-14 07:53:54,301 INFO L136 LiptonReduction]: Total number of compositions: 231 [2022-12-14 07:53:54,306 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 39 transitions, 100 flow [2022-12-14 07:53:54,343 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 643 states, 634 states have (on average 2.5741324921135647) internal successors, (1632), 642 states have internal predecessors, (1632), 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 07:53:54,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:53:54,358 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;@78b2a419, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:53:54,358 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-14 07:53:54,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 643 states, 634 states have (on average 2.5741324921135647) internal successors, (1632), 642 states have internal predecessors, (1632), 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 07:53:54,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-12-14 07:53:54,364 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:53:54,364 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-12-14 07:53:54,365 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 2 more)] === [2022-12-14 07:53:54,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:53:54,368 INFO L85 PathProgramCache]: Analyzing trace with hash -1971380439, now seen corresponding path program 1 times [2022-12-14 07:53:54,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:53:54,375 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962832811] [2022-12-14 07:53:54,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:53:54,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:53:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:53:54,517 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:53:54,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:53:54,575 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:53:54,576 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:53:54,577 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-14 07:53:54,578 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 4 remaining) [2022-12-14 07:53:54,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-14 07:53:54,579 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-14 07:53:54,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-14 07:53:54,581 INFO L445 BasicCegarLoop]: Path program histogram: [1] [2022-12-14 07:53:54,583 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:53:54,583 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-14 07:53:54,606 INFO L144 ThreadInstanceAdder]: Constructed 8 joinOtherThreadTransitions. [2022-12-14 07:53:54,610 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:53:54,610 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 239 places, 256 transitions, 560 flow [2022-12-14 07:53:54,610 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 239 places, 256 transitions, 560 flow [2022-12-14 07:53:54,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 239 places, 256 transitions, 560 flow [2022-12-14 07:53:54,798 INFO L130 PetriNetUnfolder]: 157/1207 cut-off events. [2022-12-14 07:53:54,798 INFO L131 PetriNetUnfolder]: For 72/72 co-relation queries the response was YES. [2022-12-14 07:53:54,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1304 conditions, 1207 events. 157/1207 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 30. Compared 6630 event pairs, 1 based on Foata normal form. 0/1057 useless extension candidates. Maximal degree in co-relation 725. Up to 32 conditions per place. [2022-12-14 07:53:54,826 INFO L119 LiptonReduction]: Number of co-enabled transitions 14284 [2022-12-14 07:54:10,723 INFO L134 LiptonReduction]: Checked pairs total: 48007 [2022-12-14 07:54:10,723 INFO L136 LiptonReduction]: Total number of compositions: 256 [2022-12-14 07:54:10,724 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 60 places, 63 transitions, 174 flow [2022-12-14 07:54:12,296 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 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 07:54:12,297 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-14 07:54:12,297 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;@78b2a419, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-12-14 07:54:12,298 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-14 07:54:12,378 INFO L276 IsEmpty]: Start isEmpty. Operand has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 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 07:54:12,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2022-12-14 07:54:12,381 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:12,381 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-14 07:54:12,381 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting funcBErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-14 07:54:12,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:12,382 INFO L85 PathProgramCache]: Analyzing trace with hash -419571920, now seen corresponding path program 1 times [2022-12-14 07:54:12,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:54:12,382 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872611544] [2022-12-14 07:54:12,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:12,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:54:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-14 07:54:12,531 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 07:54:12,531 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-12-14 07:54:12,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872611544] [2022-12-14 07:54:12,532 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872611544] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-14 07:54:12,532 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-14 07:54:12,532 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-14 07:54:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967267164] [2022-12-14 07:54:12,533 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-14 07:54:12,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-14 07:54:12,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-12-14 07:54:12,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-14 07:54:12,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-14 07:54:12,716 INFO L87 Difference]: Start difference. First operand has 62851 states, 62812 states have (on average 4.42253072661275) internal successors, (277788), 62850 states have internal predecessors, (277788), 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 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:54:13,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-12-14 07:54:13,714 INFO L93 Difference]: Finished difference Result 84876 states and 342496 transitions. [2022-12-14 07:54:13,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-14 07:54:13,716 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 10 [2022-12-14 07:54:13,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-12-14 07:54:14,267 INFO L225 Difference]: With dead ends: 84876 [2022-12-14 07:54:14,267 INFO L226 Difference]: Without dead ends: 81768 [2022-12-14 07:54:14,267 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 07:54:14,270 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 52 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-12-14 07:54:14,270 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 35 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-12-14 07:54:14,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81768 states. [2022-12-14 07:54:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81768 to 63168. [2022-12-14 07:54:16,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63168 states, 63125 states have (on average 4.174162376237624) internal successors, (263494), 63167 states have internal predecessors, (263494), 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 07:54:16,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63168 states to 63168 states and 263494 transitions. [2022-12-14 07:54:16,763 INFO L78 Accepts]: Start accepts. Automaton has 63168 states and 263494 transitions. Word has length 10 [2022-12-14 07:54:16,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-12-14 07:54:16,764 INFO L495 AbstractCegarLoop]: Abstraction has 63168 states and 263494 transitions. [2022-12-14 07:54:16,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 2 states have internal predecessors, (10), 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 07:54:16,764 INFO L276 IsEmpty]: Start isEmpty. Operand 63168 states and 263494 transitions. [2022-12-14 07:54:16,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-12-14 07:54:16,765 INFO L187 NwaCegarLoop]: Found error trace [2022-12-14 07:54:16,765 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-14 07:54:16,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-14 07:54:16,765 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 3 more)] === [2022-12-14 07:54:16,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-14 07:54:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash -246211174, now seen corresponding path program 1 times [2022-12-14 07:54:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-12-14 07:54:16,766 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868781311] [2022-12-14 07:54:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-14 07:54:16,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-14 07:54:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:54:16,799 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-14 07:54:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-14 07:54:16,824 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-12-14 07:54:16,825 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-14 07:54:16,825 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-14 07:54:16,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 5 remaining) [2022-12-14 07:54:16,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-14 07:54:16,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-14 07:54:16,825 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location funcBErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-14 07:54:16,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-14 07:54:16,826 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-14 07:54:16,826 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-14 07:54:16,826 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-14 07:54:16,843 INFO L144 ThreadInstanceAdder]: Constructed 12 joinOtherThreadTransitions. [2022-12-14 07:54:16,845 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-12-14 07:54:16,846 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 277 places, 296 transitions, 670 flow [2022-12-14 07:54:16,846 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 277 places, 296 transitions, 670 flow [2022-12-14 07:54:16,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 277 places, 296 transitions, 670 flow [2022-12-14 07:54:17,491 INFO L130 PetriNetUnfolder]: 655/3912 cut-off events. [2022-12-14 07:54:17,491 INFO L131 PetriNetUnfolder]: For 419/419 co-relation queries the response was YES. [2022-12-14 07:54:17,516 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4363 conditions, 3912 events. 655/3912 cut-off events. For 419/419 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 29179 event pairs, 32 based on Foata normal form. 0/3433 useless extension candidates. Maximal degree in co-relation 2329. Up to 192 conditions per place. [2022-12-14 07:54:17,598 INFO L119 LiptonReduction]: Number of co-enabled transitions 25878 [2022-12-14 07:54:32,888 INFO L134 LiptonReduction]: Checked pairs total: 95252 [2022-12-14 07:54:32,888 INFO L136 LiptonReduction]: Total number of compositions: 285 [2022-12-14 07:54:32,889 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 80 places, 84 transitions, 246 flow