./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6b4ec56b 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_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9 --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 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f --- 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-6b4ec56 [2022-11-20 19:48:11,861 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-20 19:48:11,864 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-20 19:48:11,905 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-20 19:48:11,905 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-20 19:48:11,909 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-20 19:48:11,912 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-20 19:48:11,915 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-20 19:48:11,917 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-20 19:48:11,922 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-20 19:48:11,923 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-20 19:48:11,924 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-20 19:48:11,924 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-20 19:48:11,925 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-20 19:48:11,926 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-20 19:48:11,927 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-20 19:48:11,928 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-20 19:48:11,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-20 19:48:11,935 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-20 19:48:11,941 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-20 19:48:11,944 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-20 19:48:11,946 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-20 19:48:11,948 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-20 19:48:11,949 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-20 19:48:11,959 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-20 19:48:11,959 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-20 19:48:11,960 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-20 19:48:11,962 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-20 19:48:11,962 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-20 19:48:11,963 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-20 19:48:11,964 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-20 19:48:11,964 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-20 19:48:11,966 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-20 19:48:11,968 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-20 19:48:11,969 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-20 19:48:11,969 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-20 19:48:11,971 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-20 19:48:11,971 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-20 19:48:11,971 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-20 19:48:11,973 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-20 19:48:11,974 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-20 19:48:11,975 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-20 19:48:12,014 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-20 19:48:12,015 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-20 19:48:12,015 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-20 19:48:12,016 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-20 19:48:12,017 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-20 19:48:12,017 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-20 19:48:12,017 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-20 19:48:12,018 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-20 19:48:12,018 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-20 19:48:12,018 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-20 19:48:12,019 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-20 19:48:12,019 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-20 19:48:12,020 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-20 19:48:12,020 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-20 19:48:12,020 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-20 19:48:12,021 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-20 19:48:12,021 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-20 19:48:12,021 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-20 19:48:12,022 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-20 19:48:12,022 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-20 19:48:12,022 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-20 19:48:12,023 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-20 19:48:12,023 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-20 19:48:12,023 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-20 19:48:12,023 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-20 19:48:12,024 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-20 19:48:12,024 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-20 19:48:12,024 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-20 19:48:12,024 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-20 19:48:12,025 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-20 19:48:12,025 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-20 19:48:12,025 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-20 19:48:12,026 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:12,026 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-20 19:48:12,026 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-20 19:48:12,027 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-20 19:48:12,027 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-20 19:48:12,027 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-20 19:48:12,027 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-20 19:48:12,028 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-20 19:48:12,028 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-20 19:48:12,028 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_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4e91816f101a416d37c086dd7185cfb4e2bfa63eb286e4a418cb94db27cf2f6f [2022-11-20 19:48:12,369 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-20 19:48:12,408 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-20 19:48:12,411 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-20 19:48:12,412 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-20 19:48:12,413 INFO L275 PluginConnector]: CDTParser initialized [2022-11-20 19:48:12,414 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/../../sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-20 19:48:15,516 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-20 19:48:15,803 INFO L351 CDTParser]: Found 1 translation units. [2022-11-20 19:48:15,811 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i [2022-11-20 19:48:15,828 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/data/b6a3551e5/b8c005f2e39d46b3a36099907df54d9d/FLAG31c7e2739 [2022-11-20 19:48:15,846 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/data/b6a3551e5/b8c005f2e39d46b3a36099907df54d9d [2022-11-20 19:48:15,849 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-20 19:48:15,851 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-20 19:48:15,854 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:15,855 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-20 19:48:15,858 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-20 19:48:15,859 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:15" (1/1) ... [2022-11-20 19:48:15,861 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@800f40e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:15, skipping insertion in model container [2022-11-20 19:48:15,861 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 07:48:15" (1/1) ... [2022-11-20 19:48:15,869 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-20 19:48:15,922 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-20 19:48:16,297 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_1657474a-0a4f-4339-911a-60e2c25d01dd/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-20 19:48:16,321 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:16,341 INFO L203 MainTranslator]: Completed pre-run [2022-11-20 19:48:16,390 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_1657474a-0a4f-4339-911a-60e2c25d01dd/sv-benchmarks/c/goblint-regression/28-race_reach_20-callback_racefree.i[30212,30225] [2022-11-20 19:48:16,400 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-20 19:48:16,438 INFO L208 MainTranslator]: Completed translation [2022-11-20 19:48:16,438 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16 WrapperNode [2022-11-20 19:48:16,438 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-20 19:48:16,439 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:16,439 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-20 19:48:16,439 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-20 19:48:16,445 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,460 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,484 INFO L138 Inliner]: procedures = 173, calls = 33, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 134 [2022-11-20 19:48:16,484 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-20 19:48:16,485 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-20 19:48:16,485 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-20 19:48:16,485 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-20 19:48:16,494 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,494 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,497 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,498 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,505 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,530 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,532 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,533 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,536 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-20 19:48:16,537 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-20 19:48:16,537 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-20 19:48:16,537 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-20 19:48:16,538 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (1/1) ... [2022-11-20 19:48:16,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-20 19:48:16,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:16,572 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-20 19:48:16,580 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-20 19:48:16,615 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-20 19:48:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-20 19:48:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-20 19:48:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-20 19:48:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-20 19:48:16,616 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-20 19:48:16,617 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-20 19:48:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-20 19:48:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-20 19:48:16,617 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-20 19:48:16,618 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-20 19:48:16,620 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-20 19:48:16,760 INFO L235 CfgBuilder]: Building ICFG [2022-11-20 19:48:16,762 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-20 19:48:17,109 INFO L276 CfgBuilder]: Performing block encoding [2022-11-20 19:48:17,117 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-20 19:48:17,118 INFO L300 CfgBuilder]: Removed 11 assume(true) statements. [2022-11-20 19:48:17,120 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:17 BoogieIcfgContainer [2022-11-20 19:48:17,120 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-20 19:48:17,123 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-20 19:48:17,123 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-20 19:48:17,131 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-20 19:48:17,131 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 07:48:15" (1/3) ... [2022-11-20 19:48:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbc3bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:17, skipping insertion in model container [2022-11-20 19:48:17,132 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 07:48:16" (2/3) ... [2022-11-20 19:48:17,132 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2cbc3bc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 07:48:17, skipping insertion in model container [2022-11-20 19:48:17,133 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 07:48:17" (3/3) ... [2022-11-20 19:48:17,134 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_20-callback_racefree.i [2022-11-20 19:48:17,144 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-20 19:48:17,156 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-20 19:48:17,156 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-20 19:48:17,157 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-20 19:48:17,267 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-20 19:48:17,319 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:48:17,341 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 148 transitions, 304 flow [2022-11-20 19:48:17,346 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 148 transitions, 304 flow [2022-11-20 19:48:17,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 148 transitions, 304 flow [2022-11-20 19:48:17,514 INFO L130 PetriNetUnfolder]: 26/224 cut-off events. [2022-11-20 19:48:17,514 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-20 19:48:17,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 230 conditions, 224 events. 26/224 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 582 event pairs, 0 based on Foata normal form. 0/194 useless extension candidates. Maximal degree in co-relation 114. Up to 6 conditions per place. [2022-11-20 19:48:17,534 INFO L119 LiptonReduction]: Number of co-enabled transitions 3608 [2022-11-20 19:48:22,372 INFO L134 LiptonReduction]: Checked pairs total: 5281 [2022-11-20 19:48:22,372 INFO L136 LiptonReduction]: Total number of compositions: 141 [2022-11-20 19:48:22,380 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 36 transitions, 80 flow [2022-11-20 19:48:22,402 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:22,418 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:22,424 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;@6c15e579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:22,424 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-20 19:48:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:22,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:48:22,432 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:22,433 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:48:22,434 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:22,439 INFO L85 PathProgramCache]: Analyzing trace with hash -729261349, now seen corresponding path program 1 times [2022-11-20 19:48:22,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:22,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118220728] [2022-11-20 19:48:22,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:22,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:22,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:22,885 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:22,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118220728] [2022-11-20 19:48:22,887 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [118220728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:22,888 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:22,888 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:48:22,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046032494] [2022-11-20 19:48:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:22,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:22,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:22,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:22,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:22,930 INFO L87 Difference]: Start difference. First operand has 91 states, 87 states have (on average 2.6666666666666665) internal successors, (232), 90 states have internal predecessors, (232), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:23,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:23,039 INFO L93 Difference]: Finished difference Result 120 states and 216 transitions. [2022-11-20 19:48:23,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:23,041 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-20 19:48:23,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:23,052 INFO L225 Difference]: With dead ends: 120 [2022-11-20 19:48:23,052 INFO L226 Difference]: Without dead ends: 87 [2022-11-20 19:48:23,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:23,059 INFO L413 NwaCegarLoop]: 2 mSDtfsCounter, 17 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 3 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:23,065 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 3 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:23,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-11-20 19:48:23,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-11-20 19:48:23,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 84 states have (on average 1.8452380952380953) internal successors, (155), 86 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:23,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 155 transitions. [2022-11-20 19:48:23,118 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 155 transitions. Word has length 6 [2022-11-20 19:48:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:23,119 INFO L495 AbstractCegarLoop]: Abstraction has 87 states and 155 transitions. [2022-11-20 19:48:23,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:23,120 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 155 transitions. [2022-11-20 19:48:23,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:48:23,121 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:23,121 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-20 19:48:23,121 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-20 19:48:23,122 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-20 19:48:23,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash -729225559, now seen corresponding path program 1 times [2022-11-20 19:48:23,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:23,123 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241076892] [2022-11-20 19:48:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:23,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:23,166 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:48:23,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:23,221 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:48:23,222 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:48:23,228 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-20 19:48:23,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-20 19:48:23,231 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-20 19:48:23,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-20 19:48:23,234 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 19:48:23,237 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 19:48:23,238 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-20 19:48:23,275 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-20 19:48:23,285 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:48:23,286 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 158 places, 172 transitions, 362 flow [2022-11-20 19:48:23,287 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 158 places, 172 transitions, 362 flow [2022-11-20 19:48:23,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 158 places, 172 transitions, 362 flow [2022-11-20 19:48:23,390 INFO L130 PetriNetUnfolder]: 43/349 cut-off events. [2022-11-20 19:48:23,390 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-20 19:48:23,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 349 events. 43/349 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1233 event pairs, 0 based on Foata normal form. 0/300 useless extension candidates. Maximal degree in co-relation 226. Up to 9 conditions per place. [2022-11-20 19:48:23,401 INFO L119 LiptonReduction]: Number of co-enabled transitions 8668 [2022-11-20 19:48:27,691 INFO L134 LiptonReduction]: Checked pairs total: 13589 [2022-11-20 19:48:27,691 INFO L136 LiptonReduction]: Total number of compositions: 165 [2022-11-20 19:48:27,693 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 47 transitions, 112 flow [2022-11-20 19:48:27,761 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:27,763 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:27,764 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;@6c15e579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:27,764 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-20 19:48:27,768 INFO L276 IsEmpty]: Start isEmpty. Operand has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:27,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:48:27,768 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:27,769 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:48:27,769 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 19:48:27,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:27,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1354092889, now seen corresponding path program 1 times [2022-11-20 19:48:27,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:27,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401077335] [2022-11-20 19:48:27,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:27,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:27,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:27,861 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:27,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401077335] [2022-11-20 19:48:27,862 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401077335] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:27,862 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:27,862 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:48:27,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146944335] [2022-11-20 19:48:27,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:27,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:27,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:27,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:27,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:27,874 INFO L87 Difference]: Start difference. First operand has 911 states, 893 states have (on average 3.5319148936170213) internal successors, (3154), 910 states have internal predecessors, (3154), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:28,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:28,018 INFO L93 Difference]: Finished difference Result 1324 states and 3357 transitions. [2022-11-20 19:48:28,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:28,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-20 19:48:28,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:28,036 INFO L225 Difference]: With dead ends: 1324 [2022-11-20 19:48:28,037 INFO L226 Difference]: Without dead ends: 1055 [2022-11-20 19:48:28,037 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:28,040 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 28 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:28,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 6 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:28,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2022-11-20 19:48:28,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 973. [2022-11-20 19:48:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 973 states, 964 states have (on average 2.5850622406639006) internal successors, (2492), 972 states have internal predecessors, (2492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:28,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 973 states to 973 states and 2492 transitions. [2022-11-20 19:48:28,141 INFO L78 Accepts]: Start accepts. Automaton has 973 states and 2492 transitions. Word has length 6 [2022-11-20 19:48:28,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:28,141 INFO L495 AbstractCegarLoop]: Abstraction has 973 states and 2492 transitions. [2022-11-20 19:48:28,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:28,142 INFO L276 IsEmpty]: Start isEmpty. Operand 973 states and 2492 transitions. [2022-11-20 19:48:28,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-20 19:48:28,143 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:28,144 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-20 19:48:28,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-20 19:48:28,144 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-20 19:48:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash -299507402, now seen corresponding path program 1 times [2022-11-20 19:48:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:28,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95187616] [2022-11-20 19:48:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:28,187 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:48:28,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:28,214 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:48:28,216 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:48:28,217 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-20 19:48:28,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-20 19:48:28,217 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-20 19:48:28,218 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-20 19:48:28,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-20 19:48:28,219 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-20 19:48:28,219 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 19:48:28,219 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-20 19:48:28,247 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-20 19:48:28,250 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:48:28,251 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 180 places, 196 transitions, 422 flow [2022-11-20 19:48:28,251 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 180 places, 196 transitions, 422 flow [2022-11-20 19:48:28,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 180 places, 196 transitions, 422 flow [2022-11-20 19:48:28,337 INFO L130 PetriNetUnfolder]: 65/507 cut-off events. [2022-11-20 19:48:28,337 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-20 19:48:28,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 507 events. 65/507 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 2027 event pairs, 1 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 357. Up to 16 conditions per place. [2022-11-20 19:48:28,358 INFO L119 LiptonReduction]: Number of co-enabled transitions 14652 [2022-11-20 19:48:33,670 INFO L134 LiptonReduction]: Checked pairs total: 24266 [2022-11-20 19:48:33,671 INFO L136 LiptonReduction]: Total number of compositions: 185 [2022-11-20 19:48:33,672 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 47 places, 59 transitions, 148 flow [2022-11-20 19:48:34,013 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 7306 states, 7262 states have (on average 4.848526576700634) internal successors, (35210), 7305 states have internal predecessors, (35210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:34,016 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:34,018 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;@6c15e579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:34,019 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-20 19:48:34,056 INFO L276 IsEmpty]: Start isEmpty. Operand has 7306 states, 7262 states have (on average 4.848526576700634) internal successors, (35210), 7305 states have internal predecessors, (35210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:34,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:48:34,064 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:34,064 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:48:34,065 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 19:48:34,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:34,066 INFO L85 PathProgramCache]: Analyzing trace with hash 452625458, now seen corresponding path program 1 times [2022-11-20 19:48:34,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:34,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052790472] [2022-11-20 19:48:34,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:34,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:34,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:34,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:34,162 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:34,163 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052790472] [2022-11-20 19:48:34,163 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052790472] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:34,164 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:34,164 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:48:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764533259] [2022-11-20 19:48:34,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:34,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:34,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:34,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:34,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:34,199 INFO L87 Difference]: Start difference. First operand has 7306 states, 7262 states have (on average 4.848526576700634) internal successors, (35210), 7305 states have internal predecessors, (35210), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:34,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:34,474 INFO L93 Difference]: Finished difference Result 11268 states and 36810 transitions. [2022-11-20 19:48:34,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:34,475 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-20 19:48:34,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:34,756 INFO L225 Difference]: With dead ends: 11268 [2022-11-20 19:48:34,756 INFO L226 Difference]: Without dead ends: 9219 [2022-11-20 19:48:34,757 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:34,758 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 35 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:34,758 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 10 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:34,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9219 states. [2022-11-20 19:48:35,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9219 to 8613. [2022-11-20 19:48:35,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8613 states, 8586 states have (on average 3.3067784765897974) internal successors, (28392), 8612 states have internal predecessors, (28392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8613 states to 8613 states and 28392 transitions. [2022-11-20 19:48:35,114 INFO L78 Accepts]: Start accepts. Automaton has 8613 states and 28392 transitions. Word has length 6 [2022-11-20 19:48:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:35,114 INFO L495 AbstractCegarLoop]: Abstraction has 8613 states and 28392 transitions. [2022-11-20 19:48:35,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 8613 states and 28392 transitions. [2022-11-20 19:48:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:48:35,116 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:35,116 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:35,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-20 19:48:35,117 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 19:48:35,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:35,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1938610479, now seen corresponding path program 1 times [2022-11-20 19:48:35,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:35,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757145528] [2022-11-20 19:48:35,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:35,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:35,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:35,247 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:35,247 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757145528] [2022-11-20 19:48:35,247 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757145528] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:35,248 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905988501] [2022-11-20 19:48:35,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:35,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:35,249 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:35,261 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:35,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-20 19:48:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:35,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:48:35,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:35,487 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:35,488 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:35,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:35,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905988501] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:35,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1653222116] [2022-11-20 19:48:35,539 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 19:48:35,550 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:48:35,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 19:48:35,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538846998] [2022-11-20 19:48:35,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:48:35,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:48:35,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:35,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:48:35,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:35,553 INFO L87 Difference]: Start difference. First operand 8613 states and 28392 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:35,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:35,662 INFO L93 Difference]: Finished difference Result 1251 states and 3995 transitions. [2022-11-20 19:48:35,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:35,663 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 19:48:35,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:35,672 INFO L225 Difference]: With dead ends: 1251 [2022-11-20 19:48:35,672 INFO L226 Difference]: Without dead ends: 1251 [2022-11-20 19:48:35,672 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:35,673 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 104 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:35,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 13 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2022-11-20 19:48:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1251. [2022-11-20 19:48:35,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1251 states, 1250 states have (on average 3.196) internal successors, (3995), 1250 states have internal predecessors, (3995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:35,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1251 states to 1251 states and 3995 transitions. [2022-11-20 19:48:35,724 INFO L78 Accepts]: Start accepts. Automaton has 1251 states and 3995 transitions. Word has length 13 [2022-11-20 19:48:35,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:35,724 INFO L495 AbstractCegarLoop]: Abstraction has 1251 states and 3995 transitions. [2022-11-20 19:48:35,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:35,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1251 states and 3995 transitions. [2022-11-20 19:48:35,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-20 19:48:35,726 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:35,727 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-20 19:48:35,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-20 19:48:35,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:35,933 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-20 19:48:35,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:35,933 INFO L85 PathProgramCache]: Analyzing trace with hash 999807921, now seen corresponding path program 1 times [2022-11-20 19:48:35,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:35,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776733009] [2022-11-20 19:48:35,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:35,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:35,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:35,956 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:48:35,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:35,978 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:48:35,979 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:48:35,979 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-20 19:48:35,979 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-20 19:48:35,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-20 19:48:35,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-20 19:48:35,980 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-20 19:48:35,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-20 19:48:35,981 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 19:48:35,982 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 19:48:35,982 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-20 19:48:36,012 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-20 19:48:36,016 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:48:36,016 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 202 places, 220 transitions, 484 flow [2022-11-20 19:48:36,017 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 202 places, 220 transitions, 484 flow [2022-11-20 19:48:36,017 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 202 places, 220 transitions, 484 flow [2022-11-20 19:48:36,169 INFO L130 PetriNetUnfolder]: 99/733 cut-off events. [2022-11-20 19:48:36,169 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-20 19:48:36,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 788 conditions, 733 events. 99/733 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3265 event pairs, 6 based on Foata normal form. 0/630 useless extension candidates. Maximal degree in co-relation 527. Up to 32 conditions per place. [2022-11-20 19:48:36,196 INFO L119 LiptonReduction]: Number of co-enabled transitions 21736 [2022-11-20 19:48:41,323 INFO L134 LiptonReduction]: Checked pairs total: 35515 [2022-11-20 19:48:41,323 INFO L136 LiptonReduction]: Total number of compositions: 205 [2022-11-20 19:48:41,324 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 56 places, 68 transitions, 180 flow [2022-11-20 19:48:44,188 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:44,190 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:48:44,190 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;@6c15e579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:48:44,190 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-20 19:48:44,314 INFO L276 IsEmpty]: Start isEmpty. Operand has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:44,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:48:44,314 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:44,314 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:48:44,315 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 19:48:44,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:44,317 INFO L85 PathProgramCache]: Analyzing trace with hash 845387252, now seen corresponding path program 1 times [2022-11-20 19:48:44,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:44,317 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468732020] [2022-11-20 19:48:44,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:44,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:44,557 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:44,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468732020] [2022-11-20 19:48:44,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468732020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:48:44,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:48:44,558 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:48:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008292278] [2022-11-20 19:48:44,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:48:44,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:48:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:48:44,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:44,675 INFO L87 Difference]: Start difference. First operand has 54211 states, 54079 states have (on average 5.747480537731836) internal successors, (310818), 54210 states have internal predecessors, (310818), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:46,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:46,782 INFO L93 Difference]: Finished difference Result 85624 states and 341511 transitions. [2022-11-20 19:48:46,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-20 19:48:46,782 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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 6 [2022-11-20 19:48:46,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:47,998 INFO L225 Difference]: With dead ends: 85624 [2022-11-20 19:48:47,998 INFO L226 Difference]: Without dead ends: 73475 [2022-11-20 19:48:47,999 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:48:48,001 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:48,001 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 10 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-20 19:48:48,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73475 states. [2022-11-20 19:48:51,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73475 to 70039. [2022-11-20 19:48:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70039 states, 69958 states have (on average 4.010649246690872) internal successors, (280577), 70038 states have internal predecessors, (280577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:52,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70039 states to 70039 states and 280577 transitions. [2022-11-20 19:48:52,919 INFO L78 Accepts]: Start accepts. Automaton has 70039 states and 280577 transitions. Word has length 6 [2022-11-20 19:48:52,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:52,919 INFO L495 AbstractCegarLoop]: Abstraction has 70039 states and 280577 transitions. [2022-11-20 19:48:52,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:52,923 INFO L276 IsEmpty]: Start isEmpty. Operand 70039 states and 280577 transitions. [2022-11-20 19:48:52,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-11-20 19:48:52,924 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:52,924 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:52,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-20 19:48:52,924 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 19:48:52,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:52,925 INFO L85 PathProgramCache]: Analyzing trace with hash 104647898, now seen corresponding path program 1 times [2022-11-20 19:48:52,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:52,925 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421328701] [2022-11-20 19:48:52,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:52,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:52,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:53,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:53,018 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:48:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421328701] [2022-11-20 19:48:53,018 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421328701] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-20 19:48:53,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090960414] [2022-11-20 19:48:53,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:53,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:53,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 [2022-11-20 19:48:53,024 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-20 19:48:53,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-20 19:48:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:48:53,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-20 19:48:53,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-20 19:48:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:53,242 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-20 19:48:53,275 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:48:53,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090960414] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-20 19:48:53,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [221971089] [2022-11-20 19:48:53,276 FATAL L? ?]: Ignoring exception! java.lang.UnsupportedOperationException: Cannot create path program transition for IcfgForkThreadOtherTransition at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.createPathProgramTransition(PathProgram.java:270) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183) at java.base/java.util.stream.ReferencePipeline$2$1.accept(ReferencePipeline.java:177) at java.base/java.util.HashMap$KeySpliterator.forEachRemaining(HashMap.java:1621) at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:484) at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:474) at java.base/java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:150) at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:173) at java.base/java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) at java.base/java.util.stream.ReferencePipeline.forEach(ReferencePipeline.java:497) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram$PathProgramConstructor.(PathProgram.java:235) at de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder.cfg.PathProgram.constructPathProgram(PathProgram.java:112) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:91) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:68) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:101) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:77) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:266) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:147) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:137) at de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:85) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:82) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:336) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:431) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.startCegar(AbstractCegarLoop.java:366) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.runCegar(AbstractCegarLoop.java:348) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:415) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:302) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:225) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:173) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2022-11-20 19:48:53,277 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-20 19:48:53,277 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-20 19:48:53,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477325090] [2022-11-20 19:48:53,278 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-20 19:48:53,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-20 19:48:53,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:48:53,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-20 19:48:53,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:53,279 INFO L87 Difference]: Start difference. First operand 70039 states and 280577 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:54,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-20 19:48:54,101 INFO L93 Difference]: Finished difference Result 64537 states and 261147 transitions. [2022-11-20 19:48:54,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-20 19:48:54,101 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2022-11-20 19:48:54,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-20 19:48:55,330 INFO L225 Difference]: With dead ends: 64537 [2022-11-20 19:48:55,330 INFO L226 Difference]: Without dead ends: 64537 [2022-11-20 19:48:55,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-20 19:48:55,332 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 63 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-20 19:48:55,333 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 30 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-20 19:48:55,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64537 states. [2022-11-20 19:48:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64537 to 64537. [2022-11-20 19:48:57,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64537 states, 64456 states have (on average 4.051554548839518) internal successors, (261147), 64536 states have internal predecessors, (261147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64537 states to 64537 states and 261147 transitions. [2022-11-20 19:48:58,259 INFO L78 Accepts]: Start accepts. Automaton has 64537 states and 261147 transitions. Word has length 13 [2022-11-20 19:48:58,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-20 19:48:58,259 INFO L495 AbstractCegarLoop]: Abstraction has 64537 states and 261147 transitions. [2022-11-20 19:48:58,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:48:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 64537 states and 261147 transitions. [2022-11-20 19:48:58,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-11-20 19:48:58,263 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:48:58,263 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-11-20 19:48:58,268 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-20 19:48:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1657474a-0a4f-4339-911a-60e2c25d01dd/bin/utaipan-6cKwYrpEi9/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-20 19:48:58,464 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-20 19:48:58,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:48:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash -1737583037, now seen corresponding path program 1 times [2022-11-20 19:48:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:48:58,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881337350] [2022-11-20 19:48:58,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:48:58,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:48:58,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:58,497 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-20 19:48:58,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-20 19:48:58,521 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-20 19:48:58,522 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-20 19:48:58,522 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-20 19:48:58,522 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-20 19:48:58,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-20 19:48:58,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-20 19:48:58,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-20 19:48:58,523 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-20 19:48:58,524 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-20 19:48:58,524 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-20 19:48:58,525 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-20 19:48:58,525 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-20 19:48:58,562 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-20 19:48:58,566 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-20 19:48:58,566 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 224 places, 244 transitions, 548 flow [2022-11-20 19:48:58,567 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 224 places, 244 transitions, 548 flow [2022-11-20 19:48:58,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 224 places, 244 transitions, 548 flow [2022-11-20 19:48:58,849 INFO L130 PetriNetUnfolder]: 161/1099 cut-off events. [2022-11-20 19:48:58,849 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-20 19:48:58,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1210 conditions, 1099 events. 161/1099 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 5467 event pairs, 23 based on Foata normal form. 0/949 useless extension candidates. Maximal degree in co-relation 778. Up to 80 conditions per place. [2022-11-20 19:48:58,905 INFO L119 LiptonReduction]: Number of co-enabled transitions 29920 [2022-11-20 19:49:05,124 INFO L134 LiptonReduction]: Checked pairs total: 54616 [2022-11-20 19:49:05,124 INFO L136 LiptonReduction]: Total number of compositions: 231 [2022-11-20 19:49:05,125 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 65 places, 78 transitions, 216 flow [2022-11-20 19:49:25,158 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:49:25,159 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-20 19:49:25,163 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;@6c15e579, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-20 19:49:25,163 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-20 19:49:25,941 INFO L276 IsEmpty]: Start isEmpty. Operand has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-20 19:49:25,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-20 19:49:25,942 INFO L187 NwaCegarLoop]: Found error trace [2022-11-20 19:49:25,942 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2022-11-20 19:49:25,942 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-20 19:49:25,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-20 19:49:25,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1583334186, now seen corresponding path program 1 times [2022-11-20 19:49:25,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-20 19:49:25,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204039316] [2022-11-20 19:49:25,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-20 19:49:25,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-20 19:49:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-20 19:49:26,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-20 19:49:26,007 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-20 19:49:26,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204039316] [2022-11-20 19:49:26,008 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204039316] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-20 19:49:26,008 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-20 19:49:26,008 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-20 19:49:26,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594950601] [2022-11-20 19:49:26,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-20 19:49:26,009 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-20 19:49:26,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-20 19:49:26,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-20 19:49:26,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-20 19:49:26,806 INFO L87 Difference]: Start difference. First operand has 401467 states, 401125 states have (on average 6.797818635088813) internal successors, (2726775), 401466 states have internal predecessors, (2726775), 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, 2 states have (on average 3.0) internal successors, (6), 2 states have internal predecessors, (6), 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)