./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 5e519f3a 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_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/config/TaipanReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI --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 ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 --- 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-5e519f3 [2022-11-03 01:47:25,786 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-03 01:47:25,788 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-03 01:47:25,841 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-03 01:47:25,842 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-03 01:47:25,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-03 01:47:25,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-03 01:47:25,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-03 01:47:25,857 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-03 01:47:25,862 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-03 01:47:25,864 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-03 01:47:25,865 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-03 01:47:25,868 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-03 01:47:25,872 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-03 01:47:25,874 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-03 01:47:25,877 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-03 01:47:25,880 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-03 01:47:25,885 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-03 01:47:25,891 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-03 01:47:25,893 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-03 01:47:25,902 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-03 01:47:25,904 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-03 01:47:25,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-03 01:47:25,906 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-03 01:47:25,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-03 01:47:25,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-03 01:47:25,916 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-03 01:47:25,917 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-03 01:47:25,918 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-03 01:47:25,919 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-03 01:47:25,919 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-03 01:47:25,920 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-03 01:47:25,921 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-03 01:47:25,922 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-03 01:47:25,924 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-03 01:47:25,924 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-03 01:47:25,925 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-03 01:47:25,925 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-03 01:47:25,925 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-03 01:47:25,930 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-03 01:47:25,932 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-03 01:47:25,933 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/config/svcomp-Reach-32bit-Taipan_Default.epf [2022-11-03 01:47:25,991 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-03 01:47:25,991 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-03 01:47:25,992 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-03 01:47:25,992 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-03 01:47:25,993 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-03 01:47:25,994 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-03 01:47:25,994 INFO L138 SettingsManager]: * User list type=DISABLED [2022-11-03 01:47:25,994 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2022-11-03 01:47:25,994 INFO L138 SettingsManager]: * Explicit value domain=true [2022-11-03 01:47:25,995 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2022-11-03 01:47:25,996 INFO L138 SettingsManager]: * Octagon Domain=false [2022-11-03 01:47:25,996 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2022-11-03 01:47:25,997 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2022-11-03 01:47:25,997 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2022-11-03 01:47:25,997 INFO L138 SettingsManager]: * Interval Domain=false [2022-11-03 01:47:25,997 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2022-11-03 01:47:25,997 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2022-11-03 01:47:25,998 INFO L138 SettingsManager]: * Simplification Technique=POLY_PAC [2022-11-03 01:47:25,999 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-03 01:47:25,999 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-03 01:47:25,999 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-03 01:47:25,999 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-03 01:47:26,000 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-03 01:47:26,000 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-03 01:47:26,000 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-03 01:47:26,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-03 01:47:26,000 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-03 01:47:26,001 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-03 01:47:26,001 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-03 01:47:26,001 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-03 01:47:26,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-03 01:47:26,002 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-03 01:47:26,002 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:26,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-03 01:47:26,003 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2022-11-03 01:47:26,003 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-03 01:47:26,003 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-03 01:47:26,003 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2022-11-03 01:47:26,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-03 01:47:26,004 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-03 01:47:26,004 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2022-11-03 01:47:26,004 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_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ca8ac8d2a0a0bfcebfb7f99229747142c166641dd0f1bf091ac2b4ae67e9ee75 [2022-11-03 01:47:26,394 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-03 01:47:26,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-03 01:47:26,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-03 01:47:26,445 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-03 01:47:26,446 INFO L275 PluginConnector]: CDTParser initialized [2022-11-03 01:47:26,448 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/../../sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-11-03 01:47:26,521 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/data/e57737476/1e9e222c413f4a79a3a8727825e53cf9/FLAGc07613e15 [2022-11-03 01:47:27,265 INFO L306 CDTParser]: Found 1 translation units. [2022-11-03 01:47:27,265 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i [2022-11-03 01:47:27,289 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/data/e57737476/1e9e222c413f4a79a3a8727825e53cf9/FLAGc07613e15 [2022-11-03 01:47:27,519 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/data/e57737476/1e9e222c413f4a79a3a8727825e53cf9 [2022-11-03 01:47:27,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-03 01:47:27,524 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-03 01:47:27,526 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:27,527 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-03 01:47:27,531 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-03 01:47:27,532 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:27" (1/1) ... [2022-11-03 01:47:27,533 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74600f70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:27, skipping insertion in model container [2022-11-03 01:47:27,534 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.11 01:47:27" (1/1) ... [2022-11-03 01:47:27,543 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-03 01:47:27,581 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-03 01:47:28,141 WARN L230 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_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-11-03 01:47:28,177 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:28,192 INFO L203 MainTranslator]: Completed pre-run [2022-11-03 01:47:28,253 WARN L230 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_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/sv-benchmarks/c/goblint-regression/28-race_reach_60-invariant_racefree.i[30176,30189] [2022-11-03 01:47:28,264 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-03 01:47:28,321 INFO L208 MainTranslator]: Completed translation [2022-11-03 01:47:28,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28 WrapperNode [2022-11-03 01:47:28,322 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-03 01:47:28,323 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:28,324 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-03 01:47:28,324 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-03 01:47:28,332 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,371 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,418 INFO L138 Inliner]: procedures = 170, calls = 34, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 141 [2022-11-03 01:47:28,419 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-03 01:47:28,421 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-03 01:47:28,421 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-03 01:47:28,422 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-03 01:47:28,433 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,433 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,460 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,461 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,466 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,483 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,484 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,486 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,496 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-03 01:47:28,497 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-03 01:47:28,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-03 01:47:28,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-03 01:47:28,499 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (1/1) ... [2022-11-03 01:47:28,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-03 01:47:28,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:47:28,546 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-03 01:47:28,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-03 01:47:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-03 01:47:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-03 01:47:28,605 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-03 01:47:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-03 01:47:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-03 01:47:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-03 01:47:28,606 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-03 01:47:28,606 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-03 01:47:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-03 01:47:28,607 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-03 01:47:28,607 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-03 01:47:28,609 WARN L209 CfgBuilder]: User set CodeBlockSize to LoopFreeBlock but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-03 01:47:28,835 INFO L235 CfgBuilder]: Building ICFG [2022-11-03 01:47:28,837 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-03 01:47:29,160 INFO L276 CfgBuilder]: Performing block encoding [2022-11-03 01:47:29,169 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-03 01:47:29,173 INFO L300 CfgBuilder]: Removed 18 assume(true) statements. [2022-11-03 01:47:29,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:29 BoogieIcfgContainer [2022-11-03 01:47:29,177 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-03 01:47:29,180 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-03 01:47:29,181 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-03 01:47:29,185 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-03 01:47:29,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.11 01:47:27" (1/3) ... [2022-11-03 01:47:29,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305ffa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:29, skipping insertion in model container [2022-11-03 01:47:29,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.11 01:47:28" (2/3) ... [2022-11-03 01:47:29,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@305ffa4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.11 01:47:29, skipping insertion in model container [2022-11-03 01:47:29,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.11 01:47:29" (3/3) ... [2022-11-03 01:47:29,190 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_60-invariant_racefree.i [2022-11-03 01:47:29,202 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-03 01:47:29,215 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-03 01:47:29,215 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-03 01:47:29,215 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-03 01:47:29,330 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-03 01:47:29,398 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:47:29,418 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 146 transitions, 300 flow [2022-11-03 01:47:29,428 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 146 transitions, 300 flow [2022-11-03 01:47:29,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 146 transitions, 300 flow [2022-11-03 01:47:29,599 INFO L130 PetriNetUnfolder]: 33/204 cut-off events. [2022-11-03 01:47:29,600 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-03 01:47:29,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 204 events. 33/204 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 673 event pairs, 0 based on Foata normal form. 0/165 useless extension candidates. Maximal degree in co-relation 110. Up to 6 conditions per place. [2022-11-03 01:47:29,615 INFO L118 LiptonReduction]: Number of co-enabled transitions 6016 [2022-11-03 01:47:34,348 INFO L133 LiptonReduction]: Checked pairs total: 16440 [2022-11-03 01:47:34,349 INFO L135 LiptonReduction]: Total number of compositions: 131 [2022-11-03 01:47:34,374 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 60 transitions, 128 flow [2022-11-03 01:47:34,460 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 383 states, 372 states have (on average 2.7419354838709675) internal successors, (1020), 382 states have internal predecessors, (1020), 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) [2022-11-03 01:47:34,484 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:47:34,492 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;@8b659, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:47:34,492 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-03 01:47:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand has 383 states, 372 states have (on average 2.7419354838709675) internal successors, (1020), 382 states have internal predecessors, (1020), 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) [2022-11-03 01:47:34,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:47:34,503 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:34,504 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:47:34,504 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 01:47:34,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:34,511 INFO L85 PathProgramCache]: Analyzing trace with hash 559351187, now seen corresponding path program 1 times [2022-11-03 01:47:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:34,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085043802] [2022-11-03 01:47:34,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:34,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:34,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:34,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:34,882 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:34,882 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085043802] [2022-11-03 01:47:34,883 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085043802] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:34,884 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:34,884 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:34,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801824221] [2022-11-03 01:47:34,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:34,892 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:34,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:34,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:34,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:34,934 INFO L87 Difference]: Start difference. First operand has 383 states, 372 states have (on average 2.7419354838709675) internal successors, (1020), 382 states have internal predecessors, (1020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:35,082 INFO L93 Difference]: Finished difference Result 369 states and 712 transitions. [2022-11-03 01:47:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:35,085 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 01:47:35,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:35,100 INFO L225 Difference]: With dead ends: 369 [2022-11-03 01:47:35,100 INFO L226 Difference]: Without dead ends: 351 [2022-11-03 01:47:35,102 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:35,106 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:35,107 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 24 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:35,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2022-11-03 01:47:35,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 351. [2022-11-03 01:47:35,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 345 states have (on average 1.9565217391304348) internal successors, (675), 350 states have internal predecessors, (675), 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) [2022-11-03 01:47:35,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 675 transitions. [2022-11-03 01:47:35,181 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 675 transitions. Word has length 5 [2022-11-03 01:47:35,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:35,182 INFO L495 AbstractCegarLoop]: Abstraction has 351 states and 675 transitions. [2022-11-03 01:47:35,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:35,183 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 675 transitions. [2022-11-03 01:47:35,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2022-11-03 01:47:35,183 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:35,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1] [2022-11-03 01:47:35,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-03 01:47:35,185 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-03 01:47:35,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:35,185 INFO L85 PathProgramCache]: Analyzing trace with hash 161424541, now seen corresponding path program 1 times [2022-11-03 01:47:35,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:35,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682372835] [2022-11-03 01:47:35,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:35,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:35,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:47:35,218 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:47:35,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:47:35,261 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:47:35,261 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:47:35,264 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-03 01:47:35,266 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-03 01:47:35,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-03 01:47:35,267 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-03 01:47:35,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-03 01:47:35,271 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-03 01:47:35,273 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 01:47:35,274 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-03 01:47:35,299 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-03 01:47:35,302 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:47:35,302 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 167 places, 195 transitions, 408 flow [2022-11-03 01:47:35,303 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 167 places, 195 transitions, 408 flow [2022-11-03 01:47:35,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 195 transitions, 408 flow [2022-11-03 01:47:35,401 INFO L130 PetriNetUnfolder]: 57/336 cut-off events. [2022-11-03 01:47:35,401 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-03 01:47:35,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 350 conditions, 336 events. 57/336 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 1274 event pairs, 0 based on Foata normal form. 0/270 useless extension candidates. Maximal degree in co-relation 206. Up to 9 conditions per place. [2022-11-03 01:47:35,423 INFO L118 LiptonReduction]: Number of co-enabled transitions 17484 [2022-11-03 01:47:40,689 INFO L133 LiptonReduction]: Checked pairs total: 49843 [2022-11-03 01:47:40,689 INFO L135 LiptonReduction]: Total number of compositions: 171 [2022-11-03 01:47:40,691 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 68 places, 91 transitions, 200 flow [2022-11-03 01:47:41,125 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 8279 states, 8251 states have (on average 4.053326869470367) internal successors, (33444), 8278 states have internal predecessors, (33444), 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) [2022-11-03 01:47:41,127 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:47:41,128 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;@8b659, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:47:41,129 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-03 01:47:41,160 INFO L276 IsEmpty]: Start isEmpty. Operand has 8279 states, 8251 states have (on average 4.053326869470367) internal successors, (33444), 8278 states have internal predecessors, (33444), 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) [2022-11-03 01:47:41,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:47:41,161 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:41,162 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:47:41,162 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-03 01:47:41,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:41,163 INFO L85 PathProgramCache]: Analyzing trace with hash 956456457, now seen corresponding path program 1 times [2022-11-03 01:47:41,164 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:41,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105254246] [2022-11-03 01:47:41,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:41,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:41,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:41,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:41,279 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:41,279 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105254246] [2022-11-03 01:47:41,280 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105254246] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:41,280 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:41,280 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:41,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37855895] [2022-11-03 01:47:41,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:41,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:41,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:41,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:41,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:41,330 INFO L87 Difference]: Start difference. First operand has 8279 states, 8251 states have (on average 4.053326869470367) internal successors, (33444), 8278 states have internal predecessors, (33444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:41,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:41,741 INFO L93 Difference]: Finished difference Result 8264 states and 23921 transitions. [2022-11-03 01:47:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:41,742 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 01:47:41,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:41,831 INFO L225 Difference]: With dead ends: 8264 [2022-11-03 01:47:41,831 INFO L226 Difference]: Without dead ends: 7709 [2022-11-03 01:47:41,832 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:41,836 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 22 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:41,839 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 46 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:47:41,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7709 states. [2022-11-03 01:47:42,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7709 to 7709. [2022-11-03 01:47:42,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7709 states, 7691 states have (on average 2.8903913665323104) internal successors, (22230), 7708 states have internal predecessors, (22230), 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) [2022-11-03 01:47:42,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7709 states to 7709 states and 22230 transitions. [2022-11-03 01:47:42,322 INFO L78 Accepts]: Start accepts. Automaton has 7709 states and 22230 transitions. Word has length 5 [2022-11-03 01:47:42,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:42,322 INFO L495 AbstractCegarLoop]: Abstraction has 7709 states and 22230 transitions. [2022-11-03 01:47:42,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:47:42,323 INFO L276 IsEmpty]: Start isEmpty. Operand 7709 states and 22230 transitions. [2022-11-03 01:47:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:47:42,324 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:42,324 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:47:42,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-03 01:47:42,325 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-03 01:47:42,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:42,326 INFO L85 PathProgramCache]: Analyzing trace with hash 180903284, now seen corresponding path program 1 times [2022-11-03 01:47:42,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:42,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636852065] [2022-11-03 01:47:42,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:42,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:42,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:42,437 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:42,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636852065] [2022-11-03 01:47:42,437 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636852065] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:42,438 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:42,438 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 01:47:42,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758670077] [2022-11-03 01:47:42,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:42,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:42,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:42,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:42,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:42,441 INFO L87 Difference]: Start difference. First operand 7709 states and 22230 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-03 01:47:42,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:47:42,673 INFO L93 Difference]: Finished difference Result 6735 states and 18022 transitions. [2022-11-03 01:47:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:47:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-03 01:47:42,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:47:42,712 INFO L225 Difference]: With dead ends: 6735 [2022-11-03 01:47:42,712 INFO L226 Difference]: Without dead ends: 6047 [2022-11-03 01:47:42,713 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 [2022-11-03 01:47:42,718 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-11-03 01:47:42,719 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 43 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-11-03 01:47:42,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6047 states. [2022-11-03 01:47:43,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6047 to 5467. [2022-11-03 01:47:43,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5467 states, 5452 states have (on average 2.7105649303008073) internal successors, (14778), 5466 states have internal predecessors, (14778), 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) [2022-11-03 01:47:43,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5467 states to 5467 states and 14778 transitions. [2022-11-03 01:47:43,056 INFO L78 Accepts]: Start accepts. Automaton has 5467 states and 14778 transitions. Word has length 7 [2022-11-03 01:47:43,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:47:43,057 INFO L495 AbstractCegarLoop]: Abstraction has 5467 states and 14778 transitions. [2022-11-03 01:47:43,057 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-03 01:47:43,057 INFO L276 IsEmpty]: Start isEmpty. Operand 5467 states and 14778 transitions. [2022-11-03 01:47:43,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-11-03 01:47:43,059 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:43,059 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-11-03 01:47:43,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-03 01:47:43,059 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-03 01:47:43,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:43,060 INFO L85 PathProgramCache]: Analyzing trace with hash 1793798781, now seen corresponding path program 1 times [2022-11-03 01:47:43,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:43,061 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345417693] [2022-11-03 01:47:43,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:43,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:47:43,096 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:47:43,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:47:43,116 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:47:43,117 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:47:43,117 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-03 01:47:43,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-03 01:47:43,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-03 01:47:43,118 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-03 01:47:43,119 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-03 01:47:43,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-03 01:47:43,120 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-03 01:47:43,120 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 01:47:43,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-03 01:47:43,213 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-03 01:47:43,232 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:47:43,233 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 207 places, 244 transitions, 518 flow [2022-11-03 01:47:43,233 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 207 places, 244 transitions, 518 flow [2022-11-03 01:47:43,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 207 places, 244 transitions, 518 flow [2022-11-03 01:47:43,388 INFO L130 PetriNetUnfolder]: 86/501 cut-off events. [2022-11-03 01:47:43,389 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-03 01:47:43,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 529 conditions, 501 events. 86/501 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2021 event pairs, 1 based on Foata normal form. 0/404 useless extension candidates. Maximal degree in co-relation 344. Up to 16 conditions per place. [2022-11-03 01:47:43,427 INFO L118 LiptonReduction]: Number of co-enabled transitions 33276 [2022-11-03 01:47:49,217 INFO L133 LiptonReduction]: Checked pairs total: 89992 [2022-11-03 01:47:49,217 INFO L135 LiptonReduction]: Total number of compositions: 208 [2022-11-03 01:47:49,219 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 89 places, 121 transitions, 272 flow [2022-11-03 01:47:57,339 INFO L135 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 161374 states, 161311 states have (on average 5.498874844244968) internal successors, (887029), 161373 states have internal predecessors, (887029), 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) [2022-11-03 01:47:57,355 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-03 01:47:57,360 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;@8b659, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-03 01:47:57,360 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-03 01:47:57,723 INFO L276 IsEmpty]: Start isEmpty. Operand has 161374 states, 161311 states have (on average 5.498874844244968) internal successors, (887029), 161373 states have internal predecessors, (887029), 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) [2022-11-03 01:47:57,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2022-11-03 01:47:57,724 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:47:57,724 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2022-11-03 01:47:57,725 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 01:47:57,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:47:57,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1433594037, now seen corresponding path program 1 times [2022-11-03 01:47:57,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:47:57,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141560506] [2022-11-03 01:47:57,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:47:57,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:47:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:47:57,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:47:57,795 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:47:57,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141560506] [2022-11-03 01:47:57,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141560506] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:47:57,796 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:47:57,796 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-03 01:47:57,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066175110] [2022-11-03 01:47:57,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:47:57,797 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:47:57,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:47:57,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:47:57,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:47:58,057 INFO L87 Difference]: Start difference. First operand has 161374 states, 161311 states have (on average 5.498874844244968) internal successors, (887029), 161373 states have internal predecessors, (887029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:02,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:02,254 INFO L93 Difference]: Finished difference Result 161359 states and 626217 transitions. [2022-11-03 01:48:02,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:02,254 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2022-11-03 01:48:02,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:04,912 INFO L225 Difference]: With dead ends: 161359 [2022-11-03 01:48:04,912 INFO L226 Difference]: Without dead ends: 153390 [2022-11-03 01:48:04,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:04,914 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 22 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:04,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 50 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-11-03 01:48:05,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153390 states. [2022-11-03 01:48:13,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153390 to 153390. [2022-11-03 01:48:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153390 states, 153342 states have (on average 3.8716463852043144) internal successors, (593686), 153389 states have internal predecessors, (593686), 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) [2022-11-03 01:48:15,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153390 states to 153390 states and 593686 transitions. [2022-11-03 01:48:15,214 INFO L78 Accepts]: Start accepts. Automaton has 153390 states and 593686 transitions. Word has length 5 [2022-11-03 01:48:15,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:15,215 INFO L495 AbstractCegarLoop]: Abstraction has 153390 states and 593686 transitions. [2022-11-03 01:48:15,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-03 01:48:15,215 INFO L276 IsEmpty]: Start isEmpty. Operand 153390 states and 593686 transitions. [2022-11-03 01:48:15,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2022-11-03 01:48:15,216 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:15,216 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:15,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-03 01:48:15,217 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 01:48:15,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:15,218 INFO L85 PathProgramCache]: Analyzing trace with hash 217099980, now seen corresponding path program 1 times [2022-11-03 01:48:15,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:15,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378257366] [2022-11-03 01:48:15,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:15,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:15,386 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:15,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378257366] [2022-11-03 01:48:15,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378257366] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-03 01:48:15,387 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-03 01:48:15,387 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-11-03 01:48:15,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906132861] [2022-11-03 01:48:15,388 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-03 01:48:15,388 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-03 01:48:15,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:15,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-03 01:48:15,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-03 01:48:15,390 INFO L87 Difference]: Start difference. First operand 153390 states and 593686 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-03 01:48:17,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:17,341 INFO L93 Difference]: Finished difference Result 147059 states and 528973 transitions. [2022-11-03 01:48:17,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-03 01:48:17,342 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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 7 [2022-11-03 01:48:17,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:18,213 INFO L225 Difference]: With dead ends: 147059 [2022-11-03 01:48:18,213 INFO L226 Difference]: Without dead ends: 139095 [2022-11-03 01:48:18,214 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 [2022-11-03 01:48:18,214 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 66 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 163 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 163 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:18,215 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 43 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 163 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:18,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139095 states. [2022-11-03 01:48:22,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139095 to 123300. [2022-11-03 01:48:22,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123300 states, 123259 states have (on average 3.642492637454466) internal successors, (448970), 123299 states have internal predecessors, (448970), 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) [2022-11-03 01:48:24,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123300 states to 123300 states and 448970 transitions. [2022-11-03 01:48:24,250 INFO L78 Accepts]: Start accepts. Automaton has 123300 states and 448970 transitions. Word has length 7 [2022-11-03 01:48:24,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:24,250 INFO L495 AbstractCegarLoop]: Abstraction has 123300 states and 448970 transitions. [2022-11-03 01:48:24,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 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) [2022-11-03 01:48:24,251 INFO L276 IsEmpty]: Start isEmpty. Operand 123300 states and 448970 transitions. [2022-11-03 01:48:24,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-11-03 01:48:24,252 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:24,253 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-03 01:48:24,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-03 01:48:24,253 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t_funErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 01:48:24,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:24,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1394268407, now seen corresponding path program 1 times [2022-11-03 01:48:24,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:24,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059355109] [2022-11-03 01:48:24,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:24,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:24,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:24,328 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2022-11-03 01:48:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059355109] [2022-11-03 01:48:24,328 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059355109] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-03 01:48:24,328 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149845466] [2022-11-03 01:48:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:24,329 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:24,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 [2022-11-03 01:48:24,339 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-03 01:48:24,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-03 01:48:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-03 01:48:24,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 3 conjunts are in the unsatisfiable core [2022-11-03 01:48:24,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-03 01:48:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:24,552 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-03 01:48:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-03 01:48:24,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149845466] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-03 01:48:24,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [181071813] [2022-11-03 01:48:24,593 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) [2022-11-03 01:48:24,596 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-03 01:48:24,597 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-03 01:48:24,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571781037] [2022-11-03 01:48:24,597 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-03 01:48:24,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-03 01:48:24,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2022-11-03 01:48:24,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-03 01:48:24,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:24,599 INFO L87 Difference]: Start difference. First operand 123300 states and 448970 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-11-03 01:48:24,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-11-03 01:48:24,785 INFO L93 Difference]: Finished difference Result 1942 states and 6369 transitions. [2022-11-03 01:48:24,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-03 01:48:24,785 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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 14 [2022-11-03 01:48:24,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-11-03 01:48:24,793 INFO L225 Difference]: With dead ends: 1942 [2022-11-03 01:48:24,794 INFO L226 Difference]: Without dead ends: 1942 [2022-11-03 01:48:24,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-03 01:48:24,795 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 113 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-11-03 01:48:24,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 18 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-11-03 01:48:24,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1942 states. [2022-11-03 01:48:24,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1942 to 1942. [2022-11-03 01:48:24,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1942 states, 1941 states have (on average 3.2812982998454405) internal successors, (6369), 1941 states have internal predecessors, (6369), 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) [2022-11-03 01:48:24,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1942 states to 1942 states and 6369 transitions. [2022-11-03 01:48:24,864 INFO L78 Accepts]: Start accepts. Automaton has 1942 states and 6369 transitions. Word has length 14 [2022-11-03 01:48:24,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-11-03 01:48:24,865 INFO L495 AbstractCegarLoop]: Abstraction has 1942 states and 6369 transitions. [2022-11-03 01:48:24,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 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) [2022-11-03 01:48:24,865 INFO L276 IsEmpty]: Start isEmpty. Operand 1942 states and 6369 transitions. [2022-11-03 01:48:24,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-11-03 01:48:24,867 INFO L187 NwaCegarLoop]: Found error trace [2022-11-03 01:48:24,868 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-11-03 01:48:24,920 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-03 01:48:25,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_81ada55b-bc4f-4fa7-b51c-b91fed88ba45/bin/utaipan-7li7fVZpFI/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-03 01:48:25,099 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-03 01:48:25,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-03 01:48:25,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1066160919, now seen corresponding path program 1 times [2022-11-03 01:48:25,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2022-11-03 01:48:25,100 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853212611] [2022-11-03 01:48:25,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-03 01:48:25,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-03 01:48:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:48:25,120 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-03 01:48:25,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-03 01:48:25,151 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2022-11-03 01:48:25,155 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-03 01:48:25,155 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-03 01:48:25,156 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-03 01:48:25,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-03 01:48:25,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-03 01:48:25,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-03 01:48:25,157 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location t_funErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-03 01:48:25,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-03 01:48:25,158 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-03 01:48:25,159 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-03 01:48:25,160 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-03 01:48:25,216 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-03 01:48:25,220 INFO L115 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2022-11-03 01:48:25,220 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 247 places, 293 transitions, 630 flow [2022-11-03 01:48:25,221 INFO L112 LiptonReduction]: Starting Lipton reduction on Petri net that has 247 places, 293 transitions, 630 flow [2022-11-03 01:48:25,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 247 places, 293 transitions, 630 flow [2022-11-03 01:48:25,421 INFO L130 PetriNetUnfolder]: 127/734 cut-off events. [2022-11-03 01:48:25,421 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-03 01:48:25,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 789 conditions, 734 events. 127/734 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 3187 event pairs, 6 based on Foata normal form. 0/598 useless extension candidates. Maximal degree in co-relation 521. Up to 32 conditions per place. [2022-11-03 01:48:25,487 INFO L118 LiptonReduction]: Number of co-enabled transitions 53768 [2022-11-03 01:48:33,227 INFO L133 LiptonReduction]: Checked pairs total: 148786 [2022-11-03 01:48:33,228 INFO L135 LiptonReduction]: Total number of compositions: 253 [2022-11-03 01:48:33,229 INFO L113 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 110 places, 149 transitions, 342 flow