./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro --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 Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d --- 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-8393723 [2022-11-18 19:42:06,418 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:42:06,423 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:42:06,461 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:42:06,461 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:42:06,465 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:42:06,467 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:42:06,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:42:06,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:42:06,478 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:42:06,479 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:42:06,480 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:42:06,480 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:42:06,481 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:42:06,482 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:42:06,483 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:42:06,484 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:42:06,485 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:42:06,486 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:42:06,492 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:42:06,494 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:42:06,495 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:42:06,498 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:42:06,499 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:42:06,510 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:42:06,510 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:42:06,511 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:42:06,512 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:42:06,513 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:42:06,514 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:42:06,514 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:42:06,515 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:42:06,517 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:42:06,518 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:42:06,519 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:42:06,519 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:42:06,520 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:42:06,520 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:42:06,520 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:42:06,521 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:42:06,522 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:42:06,523 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 19:42:06,560 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:42:06,561 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:42:06,561 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:42:06,562 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:42:06,562 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:42:06,563 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:42:06,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:42:06,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:42:06,564 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:42:06,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:42:06,565 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:42:06,565 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:42:06,566 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:42:06,566 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:42:06,566 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:42:06,566 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:42:06,567 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:42:06,567 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:42:06,567 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:42:06,567 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:42:06,568 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:42:06,568 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:42:06,568 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:42:06,568 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:42:06,569 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:42:06,569 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:42:06,569 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:42:06,570 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:42:06,570 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:42:06,570 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:42:06,570 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:42:06,571 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:42:06,571 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:42:06,571 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_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 8d24e1fe59577ae07a5b7a898c9dc79f871eafbb8fdf9529a0c24eed9c094f3d [2022-11-18 19:42:06,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:42:06,866 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:42:06,870 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:42:06,872 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:42:06,872 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:42:06,874 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-18 19:42:06,943 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/data/ed0a4efb7/59a0f69e6e804bf999efcf8750885ec4/FLAG9d94cbda0 [2022-11-18 19:42:07,443 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:42:07,448 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i [2022-11-18 19:42:07,477 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/data/ed0a4efb7/59a0f69e6e804bf999efcf8750885ec4/FLAG9d94cbda0 [2022-11-18 19:42:07,950 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/data/ed0a4efb7/59a0f69e6e804bf999efcf8750885ec4 [2022-11-18 19:42:07,952 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:42:07,953 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:42:07,955 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:42:07,955 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:42:07,959 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:42:07,960 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:42:07" (1/1) ... [2022-11-18 19:42:07,961 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@17a78947 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:07, skipping insertion in model container [2022-11-18 19:42:07,961 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:42:07" (1/1) ... [2022-11-18 19:42:07,968 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:42:08,016 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:42:08,508 WARN L234 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_d0d3ebb5-61ef-49fd-869a-0eda9df94873/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-18 19:42:08,533 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:42:08,545 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:42:08,574 WARN L234 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_d0d3ebb5-61ef-49fd-869a-0eda9df94873/sv-benchmarks/c/goblint-regression/28-race_reach_27-funptr_racing.i[41323,41336] [2022-11-18 19:42:08,582 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:42:08,632 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:42:08,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08 WrapperNode [2022-11-18 19:42:08,633 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:42:08,634 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:42:08,634 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:42:08,634 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:42:08,641 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,655 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,678 INFO L138 Inliner]: procedures = 273, calls = 43, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 148 [2022-11-18 19:42:08,679 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:42:08,679 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:42:08,680 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:42:08,680 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:42:08,688 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,688 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,691 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,692 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,697 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,701 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,703 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,704 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,707 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:42:08,707 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:42:08,707 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:42:08,708 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:42:08,709 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (1/1) ... [2022-11-18 19:42:08,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:42:08,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:42:08,738 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:42:08,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:42:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:42:08,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:42:08,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:42:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:42:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 19:42:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:42:08,790 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-11-18 19:42:08,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-11-18 19:42:08,797 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:42:08,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:42:08,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:42:08,800 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:42:08,959 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:42:08,961 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:42:09,183 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:42:09,192 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:42:09,192 INFO L300 CfgBuilder]: Removed 16 assume(true) statements. [2022-11-18 19:42:09,194 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:42:09 BoogieIcfgContainer [2022-11-18 19:42:09,194 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:42:09,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:42:09,197 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:42:09,200 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:42:09,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:42:07" (1/3) ... [2022-11-18 19:42:09,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b0527a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:42:09, skipping insertion in model container [2022-11-18 19:42:09,201 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:42:08" (2/3) ... [2022-11-18 19:42:09,201 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42b0527a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:42:09, skipping insertion in model container [2022-11-18 19:42:09,202 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:42:09" (3/3) ... [2022-11-18 19:42:09,203 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_27-funptr_racing.i [2022-11-18 19:42:09,211 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:42:09,221 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:42:09,221 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 19:42:09,221 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:42:09,364 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-11-18 19:42:09,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 139 places, 155 transitions, 318 flow [2022-11-18 19:42:09,511 INFO L130 PetriNetUnfolder]: 24/195 cut-off events. [2022-11-18 19:42:09,512 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:09,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201 conditions, 195 events. 24/195 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 548 event pairs, 0 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 111. Up to 4 conditions per place. [2022-11-18 19:42:09,519 INFO L82 GeneralOperation]: Start removeDead. Operand has 139 places, 155 transitions, 318 flow [2022-11-18 19:42:09,524 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 135 places, 150 transitions, 305 flow [2022-11-18 19:42:09,534 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:42:09,539 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=PETRI_NET, 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;@617dac1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:42:09,540 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:42:09,565 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-18 19:42:09,565 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:42:09,565 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:09,566 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:09,566 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:09,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1208602920, now seen corresponding path program 1 times [2022-11-18 19:42:09,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:09,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225685686] [2022-11-18 19:42:09,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:09,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:09,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:09,824 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225685686] [2022-11-18 19:42:09,826 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225685686] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:09,826 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:09,826 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:42:09,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541494862] [2022-11-18 19:42:09,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:09,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:42:09,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:09,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:42:09,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:42:09,904 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 135 out of 155 [2022-11-18 19:42:09,909 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 150 transitions, 305 flow. Second operand has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 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) [2022-11-18 19:42:09,911 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:09,912 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 135 of 155 [2022-11-18 19:42:09,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:09,983 INFO L130 PetriNetUnfolder]: 1/166 cut-off events. [2022-11-18 19:42:09,983 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:09,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 173 conditions, 166 events. 1/166 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 353 event pairs, 0 based on Foata normal form. 22/181 useless extension candidates. Maximal degree in co-relation 95. Up to 2 conditions per place. [2022-11-18 19:42:09,985 INFO L137 encePairwiseOnDemand]: 138/155 looper letters, 1 selfloop transitions, 0 changer transitions 0/132 dead transitions. [2022-11-18 19:42:09,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 132 transitions, 271 flow [2022-11-18 19:42:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:42:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:42:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 288 transitions. [2022-11-18 19:42:09,999 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9290322580645162 [2022-11-18 19:42:09,999 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 288 transitions. [2022-11-18 19:42:10,000 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 288 transitions. [2022-11-18 19:42:10,001 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:10,004 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 288 transitions. [2022-11-18 19:42:10,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 144.0) internal successors, (288), 2 states have internal predecessors, (288), 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) [2022-11-18 19:42:10,012 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-11-18 19:42:10,012 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 155.0) internal successors, (465), 3 states have internal predecessors, (465), 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) [2022-11-18 19:42:10,014 INFO L175 Difference]: Start difference. First operand has 135 places, 150 transitions, 305 flow. Second operand 2 states and 288 transitions. [2022-11-18 19:42:10,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 132 transitions, 271 flow [2022-11-18 19:42:10,018 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 132 transitions, 271 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:10,022 INFO L231 Difference]: Finished difference. Result has 135 places, 132 transitions, 269 flow [2022-11-18 19:42:10,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=155, PETRI_DIFFERENCE_MINUEND_FLOW=269, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=269, PETRI_PLACES=135, PETRI_TRANSITIONS=132} [2022-11-18 19:42:10,028 INFO L288 CegarLoopForPetriNet]: 135 programPoint places, 0 predicate places. [2022-11-18 19:42:10,028 INFO L495 AbstractCegarLoop]: Abstraction has has 135 places, 132 transitions, 269 flow [2022-11-18 19:42:10,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 135.5) internal successors, (271), 2 states have internal predecessors, (271), 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) [2022-11-18 19:42:10,029 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:10,052 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:10,054 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:42:10,054 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:10,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:10,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1029271965, now seen corresponding path program 1 times [2022-11-18 19:42:10,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:10,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993862679] [2022-11-18 19:42:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:10,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:10,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:10,129 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:42:10,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:10,178 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:42:10,179 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:42:10,180 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:42:10,182 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:42:10,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:42:10,183 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-11-18 19:42:10,186 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:42:10,186 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-18 19:42:10,233 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 19:42:10,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 195 places, 223 transitions, 464 flow [2022-11-18 19:42:10,312 INFO L130 PetriNetUnfolder]: 45/328 cut-off events. [2022-11-18 19:42:10,312 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-11-18 19:42:10,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 342 conditions, 328 events. 45/328 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1172 event pairs, 0 based on Foata normal form. 0/276 useless extension candidates. Maximal degree in co-relation 197. Up to 8 conditions per place. [2022-11-18 19:42:10,318 INFO L82 GeneralOperation]: Start removeDead. Operand has 195 places, 223 transitions, 464 flow [2022-11-18 19:42:10,322 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 195 places, 223 transitions, 464 flow [2022-11-18 19:42:10,324 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:42:10,325 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=PETRI_NET, 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;@617dac1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:42:10,325 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:42:10,349 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-18 19:42:10,354 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:10,354 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:10,355 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:10,356 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:10,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:10,363 INFO L85 PathProgramCache]: Analyzing trace with hash 2071023080, now seen corresponding path program 1 times [2022-11-18 19:42:10,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:10,364 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640793339] [2022-11-18 19:42:10,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:10,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:10,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:10,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:10,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:10,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640793339] [2022-11-18 19:42:10,452 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640793339] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:10,452 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:10,452 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:42:10,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568089542] [2022-11-18 19:42:10,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:10,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:42:10,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:10,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:42:10,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:42:10,455 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 189 out of 223 [2022-11-18 19:42:10,456 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 223 transitions, 464 flow. Second operand has 2 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 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) [2022-11-18 19:42:10,456 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:10,456 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 189 of 223 [2022-11-18 19:42:10,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:10,550 INFO L130 PetriNetUnfolder]: 5/285 cut-off events. [2022-11-18 19:42:10,551 INFO L131 PetriNetUnfolder]: For 18/22 co-relation queries the response was YES. [2022-11-18 19:42:10,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 306 conditions, 285 events. 5/285 cut-off events. For 18/22 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 925 event pairs, 0 based on Foata normal form. 64/337 useless extension candidates. Maximal degree in co-relation 175. Up to 7 conditions per place. [2022-11-18 19:42:10,555 INFO L137 encePairwiseOnDemand]: 194/223 looper letters, 4 selfloop transitions, 0 changer transitions 0/193 dead transitions. [2022-11-18 19:42:10,555 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 193 transitions, 412 flow [2022-11-18 19:42:10,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:42:10,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:42:10,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 411 transitions. [2022-11-18 19:42:10,564 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.92152466367713 [2022-11-18 19:42:10,564 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 411 transitions. [2022-11-18 19:42:10,565 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 411 transitions. [2022-11-18 19:42:10,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:10,567 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 411 transitions. [2022-11-18 19:42:10,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 205.5) internal successors, (411), 2 states have internal predecessors, (411), 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) [2022-11-18 19:42:10,572 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-11-18 19:42:10,573 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 223.0) internal successors, (669), 3 states have internal predecessors, (669), 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) [2022-11-18 19:42:10,573 INFO L175 Difference]: Start difference. First operand has 195 places, 223 transitions, 464 flow. Second operand 2 states and 411 transitions. [2022-11-18 19:42:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 193 transitions, 412 flow [2022-11-18 19:42:10,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 193 transitions, 412 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:10,581 INFO L231 Difference]: Finished difference. Result has 195 places, 193 transitions, 404 flow [2022-11-18 19:42:10,582 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=193, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=404, PETRI_PLACES=195, PETRI_TRANSITIONS=193} [2022-11-18 19:42:10,584 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 0 predicate places. [2022-11-18 19:42:10,584 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 193 transitions, 404 flow [2022-11-18 19:42:10,585 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 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) [2022-11-18 19:42:10,585 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:10,585 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:10,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 19:42:10,586 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:10,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:10,587 INFO L85 PathProgramCache]: Analyzing trace with hash -716392407, now seen corresponding path program 1 times [2022-11-18 19:42:10,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:10,588 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293257919] [2022-11-18 19:42:10,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:10,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:10,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:10,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:10,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:10,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293257919] [2022-11-18 19:42:10,707 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293257919] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:10,707 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:10,708 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:42:10,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015174412] [2022-11-18 19:42:10,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:10,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:42:10,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:10,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:42:10,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:42:10,711 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 182 out of 223 [2022-11-18 19:42:10,712 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 193 transitions, 404 flow. Second operand has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2022-11-18 19:42:10,712 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:10,712 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 182 of 223 [2022-11-18 19:42:10,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:10,786 INFO L130 PetriNetUnfolder]: 4/264 cut-off events. [2022-11-18 19:42:10,786 INFO L131 PetriNetUnfolder]: For 14/33 co-relation queries the response was YES. [2022-11-18 19:42:10,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 300 conditions, 264 events. 4/264 cut-off events. For 14/33 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 783 event pairs, 0 based on Foata normal form. 1/255 useless extension candidates. Maximal degree in co-relation 295. Up to 16 conditions per place. [2022-11-18 19:42:10,789 INFO L137 encePairwiseOnDemand]: 220/223 looper letters, 13 selfloop transitions, 2 changer transitions 0/197 dead transitions. [2022-11-18 19:42:10,789 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 197 transitions, 442 flow [2022-11-18 19:42:10,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:42:10,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:42:10,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 562 transitions. [2022-11-18 19:42:10,792 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8400597907324364 [2022-11-18 19:42:10,792 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 562 transitions. [2022-11-18 19:42:10,792 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 562 transitions. [2022-11-18 19:42:10,792 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:10,793 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 562 transitions. [2022-11-18 19:42:10,794 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 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) [2022-11-18 19:42:10,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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) [2022-11-18 19:42:10,797 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 223.0) internal successors, (892), 4 states have internal predecessors, (892), 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) [2022-11-18 19:42:10,797 INFO L175 Difference]: Start difference. First operand has 195 places, 193 transitions, 404 flow. Second operand 3 states and 562 transitions. [2022-11-18 19:42:10,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 197 transitions, 442 flow [2022-11-18 19:42:10,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 197 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:10,802 INFO L231 Difference]: Finished difference. Result has 198 places, 194 transitions, 416 flow [2022-11-18 19:42:10,802 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=223, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=416, PETRI_PLACES=198, PETRI_TRANSITIONS=194} [2022-11-18 19:42:10,803 INFO L288 CegarLoopForPetriNet]: 195 programPoint places, 3 predicate places. [2022-11-18 19:42:10,804 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 194 transitions, 416 flow [2022-11-18 19:42:10,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 183.0) internal successors, (549), 3 states have internal predecessors, (549), 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) [2022-11-18 19:42:10,804 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:10,805 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:10,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 19:42:10,805 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:10,806 INFO L85 PathProgramCache]: Analyzing trace with hash -1316226527, now seen corresponding path program 1 times [2022-11-18 19:42:10,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:10,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819561647] [2022-11-18 19:42:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:10,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:10,832 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:42:10,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:10,870 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:42:10,876 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:42:10,877 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:42:10,877 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:42:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 19:42:10,878 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-11-18 19:42:10,880 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:42:10,880 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-18 19:42:10,950 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-11-18 19:42:10,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 251 places, 291 transitions, 612 flow [2022-11-18 19:42:11,076 INFO L130 PetriNetUnfolder]: 71/494 cut-off events. [2022-11-18 19:42:11,076 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-11-18 19:42:11,081 INFO L83 FinitePrefix]: Finished finitePrefix Result has 522 conditions, 494 events. 71/494 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 1987 event pairs, 1 based on Foata normal form. 0/415 useless extension candidates. Maximal degree in co-relation 336. Up to 16 conditions per place. [2022-11-18 19:42:11,081 INFO L82 GeneralOperation]: Start removeDead. Operand has 251 places, 291 transitions, 612 flow [2022-11-18 19:42:11,089 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 251 places, 291 transitions, 612 flow [2022-11-18 19:42:11,092 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:42:11,098 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=PETRI_NET, 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;@617dac1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:42:11,099 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:42:11,110 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-18 19:42:11,110 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:11,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:11,111 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:11,111 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:11,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:11,112 INFO L85 PathProgramCache]: Analyzing trace with hash -2003761240, now seen corresponding path program 1 times [2022-11-18 19:42:11,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:11,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092982025] [2022-11-18 19:42:11,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:11,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:11,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:11,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:11,169 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092982025] [2022-11-18 19:42:11,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092982025] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:11,169 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:11,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:42:11,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398668961] [2022-11-18 19:42:11,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:11,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:42:11,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:11,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:42:11,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:42:11,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 243 out of 291 [2022-11-18 19:42:11,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 291 transitions, 612 flow. Second operand has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2022-11-18 19:42:11,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:11,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 243 of 291 [2022-11-18 19:42:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:11,314 INFO L130 PetriNetUnfolder]: 11/430 cut-off events. [2022-11-18 19:42:11,314 INFO L131 PetriNetUnfolder]: For 56/73 co-relation queries the response was YES. [2022-11-18 19:42:11,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 474 conditions, 430 events. 11/430 cut-off events. For 56/73 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1667 event pairs, 1 based on Foata normal form. 174/585 useless extension candidates. Maximal degree in co-relation 299. Up to 16 conditions per place. [2022-11-18 19:42:11,319 INFO L137 encePairwiseOnDemand]: 250/291 looper letters, 6 selfloop transitions, 0 changer transitions 0/249 dead transitions. [2022-11-18 19:42:11,319 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 249 transitions, 540 flow [2022-11-18 19:42:11,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:42:11,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:42:11,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 533 transitions. [2022-11-18 19:42:11,322 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.915807560137457 [2022-11-18 19:42:11,322 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 533 transitions. [2022-11-18 19:42:11,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 533 transitions. [2022-11-18 19:42:11,323 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:11,323 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 533 transitions. [2022-11-18 19:42:11,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 266.5) internal successors, (533), 2 states have internal predecessors, (533), 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) [2022-11-18 19:42:11,326 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2022-11-18 19:42:11,327 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2022-11-18 19:42:11,327 INFO L175 Difference]: Start difference. First operand has 251 places, 291 transitions, 612 flow. Second operand 2 states and 533 transitions. [2022-11-18 19:42:11,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 249 transitions, 540 flow [2022-11-18 19:42:11,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 249 transitions, 540 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:11,335 INFO L231 Difference]: Finished difference. Result has 251 places, 249 transitions, 528 flow [2022-11-18 19:42:11,336 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=528, PETRI_PLACES=251, PETRI_TRANSITIONS=249} [2022-11-18 19:42:11,338 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 0 predicate places. [2022-11-18 19:42:11,339 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 249 transitions, 528 flow [2022-11-18 19:42:11,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 243.5) internal successors, (487), 2 states have internal predecessors, (487), 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) [2022-11-18 19:42:11,340 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:11,340 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:11,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 19:42:11,341 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:11,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:11,341 INFO L85 PathProgramCache]: Analyzing trace with hash -496209431, now seen corresponding path program 1 times [2022-11-18 19:42:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:11,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067398822] [2022-11-18 19:42:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:11,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:11,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:11,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:11,442 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067398822] [2022-11-18 19:42:11,442 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067398822] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:11,442 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:11,442 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:42:11,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610537135] [2022-11-18 19:42:11,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:11,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:42:11,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:11,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:42:11,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:42:11,447 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 236 out of 291 [2022-11-18 19:42:11,449 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 249 transitions, 528 flow. Second operand has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 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) [2022-11-18 19:42:11,449 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:11,449 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 236 of 291 [2022-11-18 19:42:11,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:11,583 INFO L130 PetriNetUnfolder]: 10/409 cut-off events. [2022-11-18 19:42:11,583 INFO L131 PetriNetUnfolder]: For 79/196 co-relation queries the response was YES. [2022-11-18 19:42:11,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 473 conditions, 409 events. 10/409 cut-off events. For 79/196 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1537 event pairs, 1 based on Foata normal form. 1/393 useless extension candidates. Maximal degree in co-relation 467. Up to 30 conditions per place. [2022-11-18 19:42:11,589 INFO L137 encePairwiseOnDemand]: 288/291 looper letters, 15 selfloop transitions, 2 changer transitions 0/253 dead transitions. [2022-11-18 19:42:11,589 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 253 transitions, 570 flow [2022-11-18 19:42:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:42:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:42:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 726 transitions. [2022-11-18 19:42:11,593 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8316151202749141 [2022-11-18 19:42:11,593 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 726 transitions. [2022-11-18 19:42:11,593 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 726 transitions. [2022-11-18 19:42:11,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:11,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 726 transitions. [2022-11-18 19:42:11,598 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 242.0) internal successors, (726), 3 states have internal predecessors, (726), 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) [2022-11-18 19:42:11,600 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2022-11-18 19:42:11,601 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 291.0) internal successors, (1164), 4 states have internal predecessors, (1164), 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) [2022-11-18 19:42:11,601 INFO L175 Difference]: Start difference. First operand has 251 places, 249 transitions, 528 flow. Second operand 3 states and 726 transitions. [2022-11-18 19:42:11,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 253 transitions, 570 flow [2022-11-18 19:42:11,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 253 transitions, 570 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:11,608 INFO L231 Difference]: Finished difference. Result has 254 places, 250 transitions, 540 flow [2022-11-18 19:42:11,608 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=528, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=540, PETRI_PLACES=254, PETRI_TRANSITIONS=250} [2022-11-18 19:42:11,609 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 3 predicate places. [2022-11-18 19:42:11,609 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 250 transitions, 540 flow [2022-11-18 19:42:11,610 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 237.0) internal successors, (711), 3 states have internal predecessors, (711), 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) [2022-11-18 19:42:11,610 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:11,610 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:11,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 19:42:11,611 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:11,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:11,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1400735420, now seen corresponding path program 1 times [2022-11-18 19:42:11,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:11,612 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142540915] [2022-11-18 19:42:11,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:11,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:11,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:11,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:11,723 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142540915] [2022-11-18 19:42:11,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142540915] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:42:11,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445325579] [2022-11-18 19:42:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:11,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:11,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:42:11,728 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:42:11,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:42:11,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:42:11,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:11,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:11,938 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:12,001 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445325579] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:12,001 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:42:12,002 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:42:12,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818665352] [2022-11-18 19:42:12,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:12,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:42:12,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:12,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:42:12,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:42:12,008 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 235 out of 291 [2022-11-18 19:42:12,012 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 250 transitions, 540 flow. Second operand has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 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) [2022-11-18 19:42:12,012 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:12,012 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 235 of 291 [2022-11-18 19:42:12,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:12,214 INFO L130 PetriNetUnfolder]: 8/367 cut-off events. [2022-11-18 19:42:12,215 INFO L131 PetriNetUnfolder]: For 53/66 co-relation queries the response was YES. [2022-11-18 19:42:12,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 440 conditions, 367 events. 8/367 cut-off events. For 53/66 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 1080 event pairs, 5 based on Foata normal form. 3/358 useless extension candidates. Maximal degree in co-relation 432. Up to 17 conditions per place. [2022-11-18 19:42:12,219 INFO L137 encePairwiseOnDemand]: 285/291 looper letters, 16 selfloop transitions, 9 changer transitions 0/260 dead transitions. [2022-11-18 19:42:12,219 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 260 transitions, 612 flow [2022-11-18 19:42:12,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:42:12,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:42:12,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2142 transitions. [2022-11-18 19:42:12,225 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8178694158075601 [2022-11-18 19:42:12,225 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2142 transitions. [2022-11-18 19:42:12,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2142 transitions. [2022-11-18 19:42:12,226 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:12,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2142 transitions. [2022-11-18 19:42:12,231 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 238.0) internal successors, (2142), 9 states have internal predecessors, (2142), 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) [2022-11-18 19:42:12,237 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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) [2022-11-18 19:42:12,239 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 291.0) internal successors, (2910), 10 states have internal predecessors, (2910), 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) [2022-11-18 19:42:12,239 INFO L175 Difference]: Start difference. First operand has 254 places, 250 transitions, 540 flow. Second operand 9 states and 2142 transitions. [2022-11-18 19:42:12,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 260 transitions, 612 flow [2022-11-18 19:42:12,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 260 transitions, 610 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:42:12,245 INFO L231 Difference]: Finished difference. Result has 264 places, 256 transitions, 588 flow [2022-11-18 19:42:12,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=291, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=588, PETRI_PLACES=264, PETRI_TRANSITIONS=256} [2022-11-18 19:42:12,247 INFO L288 CegarLoopForPetriNet]: 251 programPoint places, 13 predicate places. [2022-11-18 19:42:12,248 INFO L495 AbstractCegarLoop]: Abstraction has has 264 places, 256 transitions, 588 flow [2022-11-18 19:42:12,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 237.3) internal successors, (2373), 10 states have internal predecessors, (2373), 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) [2022-11-18 19:42:12,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:12,249 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:12,256 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-18 19:42:12,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:12,456 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:12,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:12,457 INFO L85 PathProgramCache]: Analyzing trace with hash -1638456092, now seen corresponding path program 1 times [2022-11-18 19:42:12,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:12,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761459056] [2022-11-18 19:42:12,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:12,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:12,506 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:42:12,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:12,553 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:42:12,553 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:42:12,553 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:42:12,554 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:42:12,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-18 19:42:12,554 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 19:42:12,555 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:42:12,555 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-18 19:42:12,607 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 19:42:12,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 307 places, 359 transitions, 762 flow [2022-11-18 19:42:12,770 INFO L130 PetriNetUnfolder]: 109/728 cut-off events. [2022-11-18 19:42:12,770 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-11-18 19:42:12,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 783 conditions, 728 events. 109/728 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 3179 event pairs, 6 based on Foata normal form. 0/614 useless extension candidates. Maximal degree in co-relation 514. Up to 32 conditions per place. [2022-11-18 19:42:12,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 307 places, 359 transitions, 762 flow [2022-11-18 19:42:12,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 307 places, 359 transitions, 762 flow [2022-11-18 19:42:12,793 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:42:12,798 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=PETRI_NET, 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;@617dac1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:42:12,798 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:42:12,815 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-18 19:42:12,815 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:12,815 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:12,815 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:12,816 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:12,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:12,816 INFO L85 PathProgramCache]: Analyzing trace with hash 1869151848, now seen corresponding path program 1 times [2022-11-18 19:42:12,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:12,817 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085723151] [2022-11-18 19:42:12,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:12,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:12,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:12,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:12,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085723151] [2022-11-18 19:42:12,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085723151] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:12,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:12,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:42:12,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164739463] [2022-11-18 19:42:12,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:12,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:42:12,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:12,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:42:12,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:42:12,875 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 297 out of 359 [2022-11-18 19:42:12,875 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 359 transitions, 762 flow. Second operand has 2 states, 2 states have (on average 297.5) internal successors, (595), 2 states have internal predecessors, (595), 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) [2022-11-18 19:42:12,876 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:12,876 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 297 of 359 [2022-11-18 19:42:12,876 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:13,060 INFO L130 PetriNetUnfolder]: 25/639 cut-off events. [2022-11-18 19:42:13,060 INFO L131 PetriNetUnfolder]: For 126/150 co-relation queries the response was YES. [2022-11-18 19:42:13,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 731 conditions, 639 events. 25/639 cut-off events. For 126/150 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2838 event pairs, 6 based on Foata normal form. 444/1053 useless extension candidates. Maximal degree in co-relation 465. Up to 37 conditions per place. [2022-11-18 19:42:13,073 INFO L137 encePairwiseOnDemand]: 306/359 looper letters, 8 selfloop transitions, 0 changer transitions 0/305 dead transitions. [2022-11-18 19:42:13,074 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 305 transitions, 670 flow [2022-11-18 19:42:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:42:13,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:42:13,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 655 transitions. [2022-11-18 19:42:13,076 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9122562674094707 [2022-11-18 19:42:13,076 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 655 transitions. [2022-11-18 19:42:13,076 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 655 transitions. [2022-11-18 19:42:13,077 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:13,077 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 655 transitions. [2022-11-18 19:42:13,079 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 327.5) internal successors, (655), 2 states have internal predecessors, (655), 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) [2022-11-18 19:42:13,080 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 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) [2022-11-18 19:42:13,081 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 359.0) internal successors, (1077), 3 states have internal predecessors, (1077), 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) [2022-11-18 19:42:13,081 INFO L175 Difference]: Start difference. First operand has 307 places, 359 transitions, 762 flow. Second operand 2 states and 655 transitions. [2022-11-18 19:42:13,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 305 transitions, 670 flow [2022-11-18 19:42:13,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 305 transitions, 670 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:13,089 INFO L231 Difference]: Finished difference. Result has 307 places, 305 transitions, 654 flow [2022-11-18 19:42:13,090 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=654, PETRI_PLACES=307, PETRI_TRANSITIONS=305} [2022-11-18 19:42:13,091 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 0 predicate places. [2022-11-18 19:42:13,091 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 305 transitions, 654 flow [2022-11-18 19:42:13,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 297.5) internal successors, (595), 2 states have internal predecessors, (595), 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) [2022-11-18 19:42:13,092 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:13,092 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:13,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-18 19:42:13,093 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:13,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:13,093 INFO L85 PathProgramCache]: Analyzing trace with hash -918263639, now seen corresponding path program 1 times [2022-11-18 19:42:13,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:13,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370195704] [2022-11-18 19:42:13,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:13,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:13,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:13,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:13,203 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:13,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370195704] [2022-11-18 19:42:13,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370195704] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:13,204 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:13,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:42:13,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270095953] [2022-11-18 19:42:13,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:13,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:42:13,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:13,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:42:13,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:42:13,207 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 290 out of 359 [2022-11-18 19:42:13,210 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 305 transitions, 654 flow. Second operand has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2022-11-18 19:42:13,211 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:13,211 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 290 of 359 [2022-11-18 19:42:13,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:13,411 INFO L130 PetriNetUnfolder]: 24/618 cut-off events. [2022-11-18 19:42:13,411 INFO L131 PetriNetUnfolder]: For 130/244 co-relation queries the response was YES. [2022-11-18 19:42:13,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 735 conditions, 618 events. 24/618 cut-off events. For 130/244 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2775 event pairs, 6 based on Foata normal form. 1/591 useless extension candidates. Maximal degree in co-relation 728. Up to 56 conditions per place. [2022-11-18 19:42:13,421 INFO L137 encePairwiseOnDemand]: 356/359 looper letters, 17 selfloop transitions, 2 changer transitions 0/309 dead transitions. [2022-11-18 19:42:13,421 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 309 transitions, 700 flow [2022-11-18 19:42:13,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:42:13,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:42:13,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 890 transitions. [2022-11-18 19:42:13,424 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8263695450324977 [2022-11-18 19:42:13,424 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 890 transitions. [2022-11-18 19:42:13,425 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 890 transitions. [2022-11-18 19:42:13,425 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:13,426 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 890 transitions. [2022-11-18 19:42:13,428 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 296.6666666666667) internal successors, (890), 3 states have internal predecessors, (890), 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) [2022-11-18 19:42:13,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2022-11-18 19:42:13,431 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 359.0) internal successors, (1436), 4 states have internal predecessors, (1436), 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) [2022-11-18 19:42:13,431 INFO L175 Difference]: Start difference. First operand has 307 places, 305 transitions, 654 flow. Second operand 3 states and 890 transitions. [2022-11-18 19:42:13,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 309 transitions, 700 flow [2022-11-18 19:42:13,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 309 transitions, 700 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:13,437 INFO L231 Difference]: Finished difference. Result has 310 places, 306 transitions, 666 flow [2022-11-18 19:42:13,438 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=666, PETRI_PLACES=310, PETRI_TRANSITIONS=306} [2022-11-18 19:42:13,439 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 3 predicate places. [2022-11-18 19:42:13,440 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 306 transitions, 666 flow [2022-11-18 19:42:13,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 291.0) internal successors, (873), 3 states have internal predecessors, (873), 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) [2022-11-18 19:42:13,440 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:13,440 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:13,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-18 19:42:13,441 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:13,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:13,441 INFO L85 PathProgramCache]: Analyzing trace with hash -1259078746, now seen corresponding path program 1 times [2022-11-18 19:42:13,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:13,442 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557955615] [2022-11-18 19:42:13,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:13,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:13,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:13,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:13,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557955615] [2022-11-18 19:42:13,544 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557955615] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:42:13,544 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923263699] [2022-11-18 19:42:13,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:13,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:13,545 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:42:13,548 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:42:13,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:42:13,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:13,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:42:13,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:13,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:13,724 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:13,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923263699] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:13,767 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:42:13,767 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:42:13,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710382532] [2022-11-18 19:42:13,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:13,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:42:13,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:13,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:42:13,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:42:13,772 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 289 out of 359 [2022-11-18 19:42:13,776 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 306 transitions, 666 flow. Second operand has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 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) [2022-11-18 19:42:13,776 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:13,776 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 289 of 359 [2022-11-18 19:42:13,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:14,027 INFO L130 PetriNetUnfolder]: 22/576 cut-off events. [2022-11-18 19:42:14,027 INFO L131 PetriNetUnfolder]: For 115/137 co-relation queries the response was YES. [2022-11-18 19:42:14,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 705 conditions, 576 events. 22/576 cut-off events. For 115/137 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 2288 event pairs, 10 based on Foata normal form. 4/558 useless extension candidates. Maximal degree in co-relation 696. Up to 40 conditions per place. [2022-11-18 19:42:14,037 INFO L137 encePairwiseOnDemand]: 353/359 looper letters, 18 selfloop transitions, 9 changer transitions 0/316 dead transitions. [2022-11-18 19:42:14,037 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 316 transitions, 742 flow [2022-11-18 19:42:14,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:42:14,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:42:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 2630 transitions. [2022-11-18 19:42:14,064 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8139894769421232 [2022-11-18 19:42:14,064 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 2630 transitions. [2022-11-18 19:42:14,064 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 2630 transitions. [2022-11-18 19:42:14,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:14,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 2630 transitions. [2022-11-18 19:42:14,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 292.22222222222223) internal successors, (2630), 9 states have internal predecessors, (2630), 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) [2022-11-18 19:42:14,077 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 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) [2022-11-18 19:42:14,079 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 359.0) internal successors, (3590), 10 states have internal predecessors, (3590), 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) [2022-11-18 19:42:14,079 INFO L175 Difference]: Start difference. First operand has 310 places, 306 transitions, 666 flow. Second operand 9 states and 2630 transitions. [2022-11-18 19:42:14,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 316 transitions, 742 flow [2022-11-18 19:42:14,081 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 316 transitions, 740 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:42:14,085 INFO L231 Difference]: Finished difference. Result has 320 places, 312 transitions, 714 flow [2022-11-18 19:42:14,086 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=359, PETRI_DIFFERENCE_MINUEND_FLOW=664, PETRI_DIFFERENCE_MINUEND_PLACES=309, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=714, PETRI_PLACES=320, PETRI_TRANSITIONS=312} [2022-11-18 19:42:14,086 INFO L288 CegarLoopForPetriNet]: 307 programPoint places, 13 predicate places. [2022-11-18 19:42:14,086 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 312 transitions, 714 flow [2022-11-18 19:42:14,088 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 291.3) internal successors, (2913), 10 states have internal predecessors, (2913), 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) [2022-11-18 19:42:14,088 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:14,088 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:14,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:42:14,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 19:42:14,293 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:14,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:14,294 INFO L85 PathProgramCache]: Analyzing trace with hash -912045716, now seen corresponding path program 1 times [2022-11-18 19:42:14,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:14,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197623921] [2022-11-18 19:42:14,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:14,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:14,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:14,321 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 19:42:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 19:42:14,347 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 19:42:14,348 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 19:42:14,348 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-11-18 19:42:14,348 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-11-18 19:42:14,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-18 19:42:14,348 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-18 19:42:14,349 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-18 19:42:14,349 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-18 19:42:14,409 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-11-18 19:42:14,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 363 places, 427 transitions, 914 flow [2022-11-18 19:42:14,721 INFO L130 PetriNetUnfolder]: 175/1102 cut-off events. [2022-11-18 19:42:14,722 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-11-18 19:42:14,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1213 conditions, 1102 events. 175/1102 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 5450 event pairs, 23 based on Foata normal form. 0/937 useless extension candidates. Maximal degree in co-relation 773. Up to 80 conditions per place. [2022-11-18 19:42:14,740 INFO L82 GeneralOperation]: Start removeDead. Operand has 363 places, 427 transitions, 914 flow [2022-11-18 19:42:14,755 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 363 places, 427 transitions, 914 flow [2022-11-18 19:42:14,757 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:42:14,758 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=PETRI_NET, 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;@617dac1a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:42:14,758 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-11-18 19:42:14,766 INFO L130 PetriNetUnfolder]: 3/92 cut-off events. [2022-11-18 19:42:14,766 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 19:42:14,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:14,767 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:14,767 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:14,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:14,770 INFO L85 PathProgramCache]: Analyzing trace with hash 804860456, now seen corresponding path program 1 times [2022-11-18 19:42:14,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:14,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866347137] [2022-11-18 19:42:14,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:14,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:14,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:14,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866347137] [2022-11-18 19:42:14,802 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [866347137] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:14,803 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:14,803 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:42:14,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090772048] [2022-11-18 19:42:14,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:14,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-18 19:42:14,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:14,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-18 19:42:14,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-18 19:42:14,807 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 351 out of 427 [2022-11-18 19:42:14,808 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 427 transitions, 914 flow. Second operand has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 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) [2022-11-18 19:42:14,808 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:14,808 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 351 of 427 [2022-11-18 19:42:14,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:15,203 INFO L130 PetriNetUnfolder]: 59/980 cut-off events. [2022-11-18 19:42:15,203 INFO L131 PetriNetUnfolder]: For 295/333 co-relation queries the response was YES. [2022-11-18 19:42:15,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1177 conditions, 980 events. 59/980 cut-off events. For 295/333 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 5016 event pairs, 23 based on Foata normal form. 1070/2001 useless extension candidates. Maximal degree in co-relation 720. Up to 86 conditions per place. [2022-11-18 19:42:15,223 INFO L137 encePairwiseOnDemand]: 362/427 looper letters, 10 selfloop transitions, 0 changer transitions 0/361 dead transitions. [2022-11-18 19:42:15,223 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 361 transitions, 802 flow [2022-11-18 19:42:15,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-18 19:42:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-18 19:42:15,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 777 transitions. [2022-11-18 19:42:15,226 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9098360655737705 [2022-11-18 19:42:15,226 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 777 transitions. [2022-11-18 19:42:15,226 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 777 transitions. [2022-11-18 19:42:15,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:15,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 777 transitions. [2022-11-18 19:42:15,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 388.5) internal successors, (777), 2 states have internal predecessors, (777), 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) [2022-11-18 19:42:15,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2022-11-18 19:42:15,232 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 427.0) internal successors, (1281), 3 states have internal predecessors, (1281), 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) [2022-11-18 19:42:15,232 INFO L175 Difference]: Start difference. First operand has 363 places, 427 transitions, 914 flow. Second operand 2 states and 777 transitions. [2022-11-18 19:42:15,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 361 transitions, 802 flow [2022-11-18 19:42:15,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 361 transitions, 802 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:15,239 INFO L231 Difference]: Finished difference. Result has 363 places, 361 transitions, 782 flow [2022-11-18 19:42:15,240 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=361, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=782, PETRI_PLACES=363, PETRI_TRANSITIONS=361} [2022-11-18 19:42:15,241 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 0 predicate places. [2022-11-18 19:42:15,242 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 361 transitions, 782 flow [2022-11-18 19:42:15,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 351.5) internal successors, (703), 2 states have internal predecessors, (703), 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) [2022-11-18 19:42:15,242 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:15,242 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:15,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-18 19:42:15,244 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:15,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:15,245 INFO L85 PathProgramCache]: Analyzing trace with hash -1982555031, now seen corresponding path program 1 times [2022-11-18 19:42:15,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:15,245 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95079304] [2022-11-18 19:42:15,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:15,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:15,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:15,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:15,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:15,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95079304] [2022-11-18 19:42:15,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95079304] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:15,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:15,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 19:42:15,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668823150] [2022-11-18 19:42:15,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:15,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:42:15,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:15,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:42:15,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:42:15,301 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 344 out of 427 [2022-11-18 19:42:15,302 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 361 transitions, 782 flow. Second operand has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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) [2022-11-18 19:42:15,302 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:15,302 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 344 of 427 [2022-11-18 19:42:15,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:15,634 INFO L130 PetriNetUnfolder]: 58/959 cut-off events. [2022-11-18 19:42:15,635 INFO L131 PetriNetUnfolder]: For 324/537 co-relation queries the response was YES. [2022-11-18 19:42:15,650 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1186 conditions, 959 events. 58/959 cut-off events. For 324/537 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4933 event pairs, 23 based on Foata normal form. 1/913 useless extension candidates. Maximal degree in co-relation 1178. Up to 110 conditions per place. [2022-11-18 19:42:15,655 INFO L137 encePairwiseOnDemand]: 424/427 looper letters, 19 selfloop transitions, 2 changer transitions 0/365 dead transitions. [2022-11-18 19:42:15,656 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 365 transitions, 832 flow [2022-11-18 19:42:15,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:42:15,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:42:15,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 1054 transitions. [2022-11-18 19:42:15,659 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8227946916471507 [2022-11-18 19:42:15,659 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 1054 transitions. [2022-11-18 19:42:15,659 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 1054 transitions. [2022-11-18 19:42:15,660 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:15,660 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 1054 transitions. [2022-11-18 19:42:15,662 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 351.3333333333333) internal successors, (1054), 3 states have internal predecessors, (1054), 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) [2022-11-18 19:42:15,665 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 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) [2022-11-18 19:42:15,666 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 427.0) internal successors, (1708), 4 states have internal predecessors, (1708), 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) [2022-11-18 19:42:15,666 INFO L175 Difference]: Start difference. First operand has 363 places, 361 transitions, 782 flow. Second operand 3 states and 1054 transitions. [2022-11-18 19:42:15,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 365 transitions, 832 flow [2022-11-18 19:42:15,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 365 transitions, 832 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 19:42:15,673 INFO L231 Difference]: Finished difference. Result has 366 places, 362 transitions, 794 flow [2022-11-18 19:42:15,674 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=782, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=794, PETRI_PLACES=366, PETRI_TRANSITIONS=362} [2022-11-18 19:42:15,674 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 3 predicate places. [2022-11-18 19:42:15,675 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 362 transitions, 794 flow [2022-11-18 19:42:15,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 345.0) internal successors, (1035), 3 states have internal predecessors, (1035), 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) [2022-11-18 19:42:15,691 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:15,691 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-18 19:42:15,692 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:15,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:15,692 INFO L85 PathProgramCache]: Analyzing trace with hash -1304140408, now seen corresponding path program 1 times [2022-11-18 19:42:15,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:15,693 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375002236] [2022-11-18 19:42:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:15,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:15,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:15,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:15,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375002236] [2022-11-18 19:42:15,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375002236] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:42:15,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660803129] [2022-11-18 19:42:15,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:15,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:42:15,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:42:15,800 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:42:15,824 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:42:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:15,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:42:15,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:42:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:15,983 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:42:16,020 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:42:16,020 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660803129] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:42:16,020 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:42:16,020 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 19:42:16,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834341141] [2022-11-18 19:42:16,021 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:42:16,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:42:16,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:16,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:42:16,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:42:16,025 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 343 out of 427 [2022-11-18 19:42:16,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 362 transitions, 794 flow. Second operand has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 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) [2022-11-18 19:42:16,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:16,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 343 of 427 [2022-11-18 19:42:16,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:42:16,440 INFO L130 PetriNetUnfolder]: 56/917 cut-off events. [2022-11-18 19:42:16,440 INFO L131 PetriNetUnfolder]: For 315/452 co-relation queries the response was YES. [2022-11-18 19:42:16,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1159 conditions, 917 events. 56/917 cut-off events. For 315/452 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 4447 event pairs, 27 based on Foata normal form. 5/882 useless extension candidates. Maximal degree in co-relation 1149. Up to 91 conditions per place. [2022-11-18 19:42:16,457 INFO L137 encePairwiseOnDemand]: 421/427 looper letters, 20 selfloop transitions, 9 changer transitions 0/372 dead transitions. [2022-11-18 19:42:16,458 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 372 transitions, 874 flow [2022-11-18 19:42:16,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 19:42:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 19:42:16,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 3118 transitions. [2022-11-18 19:42:16,465 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8113453031485819 [2022-11-18 19:42:16,466 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 3118 transitions. [2022-11-18 19:42:16,466 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 3118 transitions. [2022-11-18 19:42:16,468 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:42:16,468 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 3118 transitions. [2022-11-18 19:42:16,474 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 346.44444444444446) internal successors, (3118), 9 states have internal predecessors, (3118), 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) [2022-11-18 19:42:16,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 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) [2022-11-18 19:42:16,482 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 427.0) internal successors, (4270), 10 states have internal predecessors, (4270), 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) [2022-11-18 19:42:16,483 INFO L175 Difference]: Start difference. First operand has 366 places, 362 transitions, 794 flow. Second operand 9 states and 3118 transitions. [2022-11-18 19:42:16,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 372 transitions, 874 flow [2022-11-18 19:42:16,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 372 transitions, 872 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:42:16,489 INFO L231 Difference]: Finished difference. Result has 376 places, 368 transitions, 842 flow [2022-11-18 19:42:16,490 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=427, PETRI_DIFFERENCE_MINUEND_FLOW=792, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=842, PETRI_PLACES=376, PETRI_TRANSITIONS=368} [2022-11-18 19:42:16,491 INFO L288 CegarLoopForPetriNet]: 363 programPoint places, 13 predicate places. [2022-11-18 19:42:16,491 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 368 transitions, 842 flow [2022-11-18 19:42:16,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 345.3) internal successors, (3453), 10 states have internal predecessors, (3453), 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) [2022-11-18 19:42:16,492 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:42:16,492 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:42:16,505 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 19:42:16,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d0d3ebb5-61ef-49fd-869a-0eda9df94873/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 19:42:16,697 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 19:42:16,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:42:16,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1548765897, now seen corresponding path program 1 times [2022-11-18 19:42:16,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:42:16,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293618379] [2022-11-18 19:42:16,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:42:16,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:42:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:42:16,842 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2022-11-18 19:42:16,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:42:16,842 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293618379] [2022-11-18 19:42:16,842 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293618379] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:42:16,842 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:42:16,843 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-18 19:42:16,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616259515] [2022-11-18 19:42:16,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:42:16,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-18 19:42:16,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:42:16,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-18 19:42:16,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:42:16,846 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 305 out of 427 [2022-11-18 19:42:16,847 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 368 transitions, 842 flow. Second operand has 5 states, 5 states have (on average 306.6) internal successors, (1533), 5 states have internal predecessors, (1533), 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) [2022-11-18 19:42:16,847 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:42:16,847 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 305 of 427 [2022-11-18 19:42:16,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand