./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8 --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 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-2329fc7 [2022-12-13 10:59:29,040 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 10:59:29,042 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 10:59:29,069 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 10:59:29,069 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 10:59:29,070 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 10:59:29,071 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 10:59:29,073 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 10:59:29,075 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 10:59:29,075 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 10:59:29,076 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 10:59:29,077 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 10:59:29,078 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 10:59:29,079 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 10:59:29,080 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 10:59:29,081 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 10:59:29,082 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 10:59:29,082 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 10:59:29,084 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 10:59:29,085 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 10:59:29,086 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 10:59:29,087 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 10:59:29,087 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 10:59:29,088 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 10:59:29,090 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 10:59:29,090 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 10:59:29,090 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 10:59:29,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 10:59:29,091 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 10:59:29,092 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 10:59:29,092 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 10:59:29,092 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 10:59:29,093 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 10:59:29,093 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 10:59:29,094 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 10:59:29,094 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 10:59:29,095 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 10:59:29,095 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 10:59:29,095 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 10:59:29,096 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 10:59:29,096 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 10:59:29,097 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 10:59:29,111 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 10:59:29,111 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 10:59:29,111 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 10:59:29,111 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 10:59:29,112 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 10:59:29,112 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 10:59:29,112 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 10:59:29,112 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 10:59:29,113 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 10:59:29,113 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 10:59:29,114 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 10:59:29,114 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:59:29,114 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 10:59:29,115 INFO L138 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1fe12ce8951e45860142b9cebaa325eef531c18fa917882c03ee5396afb187f5 [2022-12-13 10:59:29,277 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 10:59:29,296 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 10:59:29,298 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 10:59:29,299 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 10:59:29,299 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 10:59:29,300 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-12-13 10:59:31,967 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 10:59:32,195 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 10:59:32,196 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i [2022-12-13 10:59:32,208 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/data/aaae80271/01273fe6e71d4aa289511a7f5af2ee62/FLAGc401c0912 [2022-12-13 10:59:32,222 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/data/aaae80271/01273fe6e71d4aa289511a7f5af2ee62 [2022-12-13 10:59:32,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 10:59:32,226 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 10:59:32,227 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:32,227 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 10:59:32,231 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 10:59:32,231 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,232 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ed7d3dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32, skipping insertion in model container [2022-12-13 10:59:32,233 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,240 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 10:59:32,277 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 10:59:32,502 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-12-13 10:59:32,517 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:32,525 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 10:59:32,548 WARN L237 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/sv-benchmarks/c/goblint-regression/28-race_reach_05-lockfuns_racefree.i[30176,30189] [2022-12-13 10:59:32,553 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 10:59:32,574 INFO L208 MainTranslator]: Completed translation [2022-12-13 10:59:32,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32 WrapperNode [2022-12-13 10:59:32,575 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 10:59:32,576 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 10:59:32,576 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 10:59:32,576 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 10:59:32,581 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,590 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,605 INFO L138 Inliner]: procedures = 172, calls = 33, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 106 [2022-12-13 10:59:32,605 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 10:59:32,605 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 10:59:32,606 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 10:59:32,606 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 10:59:32,612 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,612 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,614 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,614 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,617 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,620 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,621 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,622 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 10:59:32,624 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 10:59:32,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 10:59:32,624 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 10:59:32,625 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (1/1) ... [2022-12-13 10:59:32,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 10:59:32,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:59:32,647 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 10:59:32,648 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 10:59:32,676 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 10:59:32,676 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 10:59:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 10:59:32,677 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 10:59:32,677 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 10:59:32,678 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-12-13 10:59:32,762 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 10:59:32,763 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 10:59:32,885 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 10:59:32,890 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 10:59:32,890 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 10:59:32,892 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:59:32 BoogieIcfgContainer [2022-12-13 10:59:32,892 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 10:59:32,893 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 10:59:32,893 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 10:59:32,896 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 10:59:32,896 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 10:59:32" (1/3) ... [2022-12-13 10:59:32,896 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f12ebab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:59:32, skipping insertion in model container [2022-12-13 10:59:32,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 10:59:32" (2/3) ... [2022-12-13 10:59:32,897 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f12ebab and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 10:59:32, skipping insertion in model container [2022-12-13 10:59:32,897 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 10:59:32" (3/3) ... [2022-12-13 10:59:32,898 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_05-lockfuns_racefree.i [2022-12-13 10:59:32,904 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 10:59:32,913 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 10:59:32,913 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 10:59:32,913 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 10:59:32,953 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 10:59:32,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 115 transitions, 238 flow [2022-12-13 10:59:33,049 INFO L130 PetriNetUnfolder]: 17/156 cut-off events. [2022-12-13 10:59:33,050 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 10:59:33,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 162 conditions, 156 events. 17/156 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 384 event pairs, 0 based on Foata normal form. 0/134 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-12-13 10:59:33,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 115 transitions, 238 flow [2022-12-13 10:59:33,060 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 110 transitions, 225 flow [2022-12-13 10:59:33,063 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:59:33,074 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 102 places, 110 transitions, 225 flow [2022-12-13 10:59:33,077 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 102 places, 110 transitions, 225 flow [2022-12-13 10:59:33,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 110 transitions, 225 flow [2022-12-13 10:59:33,110 INFO L130 PetriNetUnfolder]: 16/151 cut-off events. [2022-12-13 10:59:33,110 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:33,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156 conditions, 151 events. 16/151 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 374 event pairs, 0 based on Foata normal form. 0/129 useless extension candidates. Maximal degree in co-relation 79. Up to 4 conditions per place. [2022-12-13 10:59:33,114 INFO L119 LiptonReduction]: Number of co-enabled transitions 3102 [2022-12-13 10:59:34,767 INFO L134 LiptonReduction]: Checked pairs total: 4487 [2022-12-13 10:59:34,768 INFO L136 LiptonReduction]: Total number of compositions: 96 [2022-12-13 10:59:34,778 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:59:34,782 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;@317d9fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:59:34,782 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 10:59:34,784 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 10:59:34,785 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:34,785 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:34,785 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 10:59:34,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:34,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:34,789 INFO L85 PathProgramCache]: Analyzing trace with hash 13755191, now seen corresponding path program 1 times [2022-12-13 10:59:34,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:34,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580886278] [2022-12-13 10:59:34,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:34,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:34,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:34,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:34,939 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580886278] [2022-12-13 10:59:34,940 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580886278] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:34,940 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:34,940 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:59:34,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505893328] [2022-12-13 10:59:34,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:34,948 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:59:34,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:34,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:59:34,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:59:34,977 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 211 [2022-12-13 10:59:34,980 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 30 transitions, 65 flow. Second operand has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:34,980 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:34,980 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 211 [2022-12-13 10:59:34,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:35,046 INFO L130 PetriNetUnfolder]: 72/174 cut-off events. [2022-12-13 10:59:35,046 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:35,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 352 conditions, 174 events. 72/174 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 685 event pairs, 0 based on Foata normal form. 10/166 useless extension candidates. Maximal degree in co-relation 323. Up to 154 conditions per place. [2022-12-13 10:59:35,048 INFO L137 encePairwiseOnDemand]: 199/211 looper letters, 22 selfloop transitions, 2 changer transitions 4/30 dead transitions. [2022-12-13 10:59:35,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 121 flow [2022-12-13 10:59:35,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:59:35,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:59:35,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-12-13 10:59:35,058 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5292259083728278 [2022-12-13 10:59:35,058 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-12-13 10:59:35,059 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-12-13 10:59:35,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:35,061 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-12-13 10:59:35,063 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:35,067 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:35,068 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 211.0) internal successors, (844), 4 states have internal predecessors, (844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:35,069 INFO L175 Difference]: Start difference. First operand has 25 places, 30 transitions, 65 flow. Second operand 3 states and 335 transitions. [2022-12-13 10:59:35,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 121 flow [2022-12-13 10:59:35,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 10:59:35,073 INFO L231 Difference]: Finished difference. Result has 27 places, 17 transitions, 47 flow [2022-12-13 10:59:35,074 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=211, PETRI_DIFFERENCE_MINUEND_FLOW=47, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=47, PETRI_PLACES=27, PETRI_TRANSITIONS=17} [2022-12-13 10:59:35,078 INFO L288 CegarLoopForPetriNet]: 25 programPoint places, 2 predicate places. [2022-12-13 10:59:35,078 INFO L495 AbstractCegarLoop]: Abstraction has has 27 places, 17 transitions, 47 flow [2022-12-13 10:59:35,078 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 98.33333333333333) internal successors, (295), 3 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:35,078 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:35,078 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 10:59:35,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 10:59:35,079 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:35,079 INFO L85 PathProgramCache]: Analyzing trace with hash 315680561, now seen corresponding path program 1 times [2022-12-13 10:59:35,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:35,080 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [511987495] [2022-12-13 10:59:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:35,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:35,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:35,107 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 10:59:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:35,140 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 10:59:35,140 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 10:59:35,142 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 10:59:35,144 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 10:59:35,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 10:59:35,145 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 10:59:35,147 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 10:59:35,148 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 10:59:35,165 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 10:59:35,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,202 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-12-13 10:59:35,202 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 10:59:35,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 796 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-12-13 10:59:35,204 INFO L82 GeneralOperation]: Start removeDead. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,205 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,206 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:59:35,206 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,206 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 136 places, 150 transitions, 318 flow [2022-12-13 10:59:35,227 INFO L130 PetriNetUnfolder]: 31/257 cut-off events. [2022-12-13 10:59:35,227 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 10:59:35,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 271 conditions, 257 events. 31/257 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 796 event pairs, 0 based on Foata normal form. 0/219 useless extension candidates. Maximal degree in co-relation 158. Up to 8 conditions per place. [2022-12-13 10:59:35,233 INFO L119 LiptonReduction]: Number of co-enabled transitions 9108 [2022-12-13 10:59:37,027 INFO L134 LiptonReduction]: Checked pairs total: 19364 [2022-12-13 10:59:37,028 INFO L136 LiptonReduction]: Total number of compositions: 116 [2022-12-13 10:59:37,029 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:59:37,030 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;@317d9fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:59:37,030 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 10:59:37,031 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 10:59:37,031 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:37,031 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:37,031 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 10:59:37,031 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:37,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:37,032 INFO L85 PathProgramCache]: Analyzing trace with hash 23022008, now seen corresponding path program 1 times [2022-12-13 10:59:37,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:37,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956884141] [2022-12-13 10:59:37,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:37,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:37,067 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956884141] [2022-12-13 10:59:37,067 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956884141] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:37,067 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:37,067 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:59:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781466215] [2022-12-13 10:59:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:59:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:59:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:59:37,077 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 124 out of 266 [2022-12-13 10:59:37,078 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 55 transitions, 128 flow. Second operand has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,078 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:37,078 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 124 of 266 [2022-12-13 10:59:37,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:37,388 INFO L130 PetriNetUnfolder]: 1642/2949 cut-off events. [2022-12-13 10:59:37,388 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 10:59:37,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5703 conditions, 2949 events. 1642/2949 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 17664 event pairs, 752 based on Foata normal form. 214/2865 useless extension candidates. Maximal degree in co-relation 589. Up to 2673 conditions per place. [2022-12-13 10:59:37,395 INFO L137 encePairwiseOnDemand]: 249/266 looper letters, 32 selfloop transitions, 2 changer transitions 9/51 dead transitions. [2022-12-13 10:59:37,395 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 51 transitions, 204 flow [2022-12-13 10:59:37,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:59:37,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:59:37,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 435 transitions. [2022-12-13 10:59:37,398 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5451127819548872 [2022-12-13 10:59:37,398 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 435 transitions. [2022-12-13 10:59:37,399 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 435 transitions. [2022-12-13 10:59:37,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:37,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 435 transitions. [2022-12-13 10:59:37,400 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 145.0) internal successors, (435), 3 states have internal predecessors, (435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,403 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,403 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 266.0) internal successors, (1064), 4 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,404 INFO L175 Difference]: Start difference. First operand has 44 places, 55 transitions, 128 flow. Second operand 3 states and 435 transitions. [2022-12-13 10:59:37,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 51 transitions, 204 flow [2022-12-13 10:59:37,405 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 51 transitions, 204 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 10:59:37,406 INFO L231 Difference]: Finished difference. Result has 47 places, 33 transitions, 88 flow [2022-12-13 10:59:37,406 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=47, PETRI_TRANSITIONS=33} [2022-12-13 10:59:37,407 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, 3 predicate places. [2022-12-13 10:59:37,407 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 33 transitions, 88 flow [2022-12-13 10:59:37,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 125.33333333333333) internal successors, (376), 3 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:37,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:37,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 10:59:37,408 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:37,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:37,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1719993635, now seen corresponding path program 1 times [2022-12-13 10:59:37,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:37,409 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967149745] [2022-12-13 10:59:37,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:37,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:37,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:37,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:37,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967149745] [2022-12-13 10:59:37,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967149745] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:59:37,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554515225] [2022-12-13 10:59:37,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:37,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:37,469 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:59:37,470 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:59:37,472 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 10:59:37,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:37,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 10:59:37,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:59:37,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:37,556 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:59:37,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:37,574 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554515225] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:59:37,574 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:59:37,574 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 10:59:37,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780537943] [2022-12-13 10:59:37,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:59:37,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:59:37,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:37,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:59:37,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:59:37,595 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 123 out of 266 [2022-12-13 10:59:37,597 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,597 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:37,597 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 123 of 266 [2022-12-13 10:59:37,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:37,735 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2022-12-13 10:59:37,735 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-13 10:59:37,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 3958 event pairs, 0 based on Foata normal form. 90/859 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2022-12-13 10:59:37,740 INFO L137 encePairwiseOnDemand]: 263/266 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-12-13 10:59:37,740 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2022-12-13 10:59:37,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 10:59:37,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 10:59:37,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 665 transitions. [2022-12-13 10:59:37,742 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5 [2022-12-13 10:59:37,742 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 665 transitions. [2022-12-13 10:59:37,742 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 665 transitions. [2022-12-13 10:59:37,743 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:37,743 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 665 transitions. [2022-12-13 10:59:37,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 133.0) internal successors, (665), 5 states have internal predecessors, (665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,748 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,755 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 266.0) internal successors, (1596), 6 states have internal predecessors, (1596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,755 INFO L175 Difference]: Start difference. First operand has 47 places, 33 transitions, 88 flow. Second operand 5 states and 665 transitions. [2022-12-13 10:59:37,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2022-12-13 10:59:37,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 10:59:37,758 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 10:59:37,758 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=266, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 10:59:37,759 INFO L288 CegarLoopForPetriNet]: 44 programPoint places, -4 predicate places. [2022-12-13 10:59:37,759 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 10:59:37,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 125.28571428571429) internal successors, (877), 7 states have internal predecessors, (877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:37,760 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:37,760 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 10:59:37,766 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 10:59:37,960 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:37,961 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:37,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:37,962 INFO L85 PathProgramCache]: Analyzing trace with hash 2137784328, now seen corresponding path program 1 times [2022-12-13 10:59:37,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:37,963 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487960136] [2022-12-13 10:59:37,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:37,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:38,005 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 10:59:38,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:38,032 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 10:59:38,033 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 10:59:38,033 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 10:59:38,034 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 10:59:38,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 10:59:38,034 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 10:59:38,035 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 10:59:38,035 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 10:59:38,076 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 10:59:38,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,115 INFO L130 PetriNetUnfolder]: 50/391 cut-off events. [2022-12-13 10:59:38,115 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 10:59:38,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1354 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-12-13 10:59:38,117 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,119 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:59:38,119 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,119 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 185 transitions, 400 flow [2022-12-13 10:59:38,148 INFO L130 PetriNetUnfolder]: 50/391 cut-off events. [2022-12-13 10:59:38,148 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 10:59:38,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 419 conditions, 391 events. 50/391 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 1354 event pairs, 1 based on Foata normal form. 0/333 useless extension candidates. Maximal degree in co-relation 265. Up to 16 conditions per place. [2022-12-13 10:59:38,157 INFO L119 LiptonReduction]: Number of co-enabled transitions 17226 [2022-12-13 10:59:39,932 INFO L134 LiptonReduction]: Checked pairs total: 37810 [2022-12-13 10:59:39,933 INFO L136 LiptonReduction]: Total number of compositions: 136 [2022-12-13 10:59:39,934 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:59:39,934 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;@317d9fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:59:39,934 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 10:59:39,935 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 10:59:39,936 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:39,936 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:39,936 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 10:59:39,936 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:39,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:39,936 INFO L85 PathProgramCache]: Analyzing trace with hash 33979853, now seen corresponding path program 1 times [2022-12-13 10:59:39,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:39,936 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386729013] [2022-12-13 10:59:39,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:39,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:39,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:39,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386729013] [2022-12-13 10:59:39,955 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386729013] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:39,955 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:39,955 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:59:39,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795001187] [2022-12-13 10:59:39,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:39,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:59:39,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:39,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:59:39,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:59:39,965 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 151 out of 321 [2022-12-13 10:59:39,966 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 74 transitions, 178 flow. Second operand has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:39,966 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:39,966 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 151 of 321 [2022-12-13 10:59:39,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:42,017 INFO L130 PetriNetUnfolder]: 18748/29013 cut-off events. [2022-12-13 10:59:42,018 INFO L131 PetriNetUnfolder]: For 901/901 co-relation queries the response was YES. [2022-12-13 10:59:42,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56255 conditions, 29013 events. 18748/29013 cut-off events. For 901/901 co-relation queries the response was YES. Maximal size of possible extension queue 822. Compared 209257 event pairs, 12113 based on Foata normal form. 5272/31871 useless extension candidates. Maximal degree in co-relation 5131. Up to 26589 conditions per place. [2022-12-13 10:59:42,091 INFO L137 encePairwiseOnDemand]: 298/321 looper letters, 38 selfloop transitions, 2 changer transitions 10/63 dead transitions. [2022-12-13 10:59:42,091 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 63 transitions, 254 flow [2022-12-13 10:59:42,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 10:59:42,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 10:59:42,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 529 transitions. [2022-12-13 10:59:42,093 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.54932502596054 [2022-12-13 10:59:42,093 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 529 transitions. [2022-12-13 10:59:42,093 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 529 transitions. [2022-12-13 10:59:42,093 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:42,093 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 529 transitions. [2022-12-13 10:59:42,094 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 176.33333333333334) internal successors, (529), 3 states have internal predecessors, (529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,095 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,095 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 321.0) internal successors, (1284), 4 states have internal predecessors, (1284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,095 INFO L175 Difference]: Start difference. First operand has 58 places, 74 transitions, 178 flow. Second operand 3 states and 529 transitions. [2022-12-13 10:59:42,096 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 63 transitions, 254 flow [2022-12-13 10:59:42,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 63 transitions, 254 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 10:59:42,097 INFO L231 Difference]: Finished difference. Result has 61 places, 45 transitions, 121 flow [2022-12-13 10:59:42,097 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=138, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=61, PETRI_TRANSITIONS=45} [2022-12-13 10:59:42,098 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, 3 predicate places. [2022-12-13 10:59:42,098 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 45 transitions, 121 flow [2022-12-13 10:59:42,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 152.33333333333334) internal successors, (457), 3 states have internal predecessors, (457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,098 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:42,098 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 10:59:42,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 10:59:42,098 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:42,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:42,099 INFO L85 PathProgramCache]: Analyzing trace with hash 834719012, now seen corresponding path program 1 times [2022-12-13 10:59:42,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:42,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070704572] [2022-12-13 10:59:42,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:42,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:42,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:42,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070704572] [2022-12-13 10:59:42,139 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070704572] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 10:59:42,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245714131] [2022-12-13 10:59:42,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:42,140 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:42,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 10:59:42,141 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 10:59:42,142 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 10:59:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:42,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 10:59:42,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 10:59:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:42,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 10:59:42,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:42,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245714131] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 10:59:42,219 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 10:59:42,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 10:59:42,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365588171] [2022-12-13 10:59:42,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 10:59:42,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 10:59:42,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:42,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 10:59:42,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 10:59:42,234 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 321 [2022-12-13 10:59:42,236 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,236 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:42,236 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 321 [2022-12-13 10:59:42,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 10:59:42,889 INFO L130 PetriNetUnfolder]: 4342/7165 cut-off events. [2022-12-13 10:59:42,889 INFO L131 PetriNetUnfolder]: For 2576/2576 co-relation queries the response was YES. [2022-12-13 10:59:42,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16127 conditions, 7165 events. 4342/7165 cut-off events. For 2576/2576 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 47369 event pairs, 0 based on Foata normal form. 648/7813 useless extension candidates. Maximal degree in co-relation 2069. Up to 4192 conditions per place. [2022-12-13 10:59:42,911 INFO L137 encePairwiseOnDemand]: 318/321 looper letters, 72 selfloop transitions, 4 changer transitions 0/89 dead transitions. [2022-12-13 10:59:42,911 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 89 transitions, 361 flow [2022-12-13 10:59:42,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 10:59:42,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 10:59:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 979 transitions. [2022-12-13 10:59:42,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5083073727933541 [2022-12-13 10:59:42,913 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 979 transitions. [2022-12-13 10:59:42,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 979 transitions. [2022-12-13 10:59:42,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 10:59:42,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 979 transitions. [2022-12-13 10:59:42,915 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 163.16666666666666) internal successors, (979), 6 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,917 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,918 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 321.0) internal successors, (2247), 7 states have internal predecessors, (2247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,918 INFO L175 Difference]: Start difference. First operand has 61 places, 45 transitions, 121 flow. Second operand 6 states and 979 transitions. [2022-12-13 10:59:42,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 89 transitions, 361 flow [2022-12-13 10:59:42,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 89 transitions, 353 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 10:59:42,922 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 10:59:42,922 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=321, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 10:59:42,922 INFO L288 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2022-12-13 10:59:42,922 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 10:59:42,923 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 152.28571428571428) internal successors, (1066), 7 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:42,923 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:42,923 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 10:59:42,928 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 10:59:43,124 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 10:59:43,125 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1888496143, now seen corresponding path program 1 times [2022-12-13 10:59:43,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:43,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842585944] [2022-12-13 10:59:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:43,172 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 10:59:43,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 10:59:43,191 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 10:59:43,191 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 10:59:43,191 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 10:59:43,191 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 10:59:43,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 10:59:43,192 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 10:59:43,192 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 10:59:43,192 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 10:59:43,212 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 10:59:43,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,268 INFO L130 PetriNetUnfolder]: 81/593 cut-off events. [2022-12-13 10:59:43,268 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 10:59:43,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2346 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-12-13 10:59:43,270 INFO L82 GeneralOperation]: Start removeDead. Operand has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,274 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,274 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 10:59:43,274 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,274 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 196 places, 220 transitions, 484 flow [2022-12-13 10:59:43,324 INFO L130 PetriNetUnfolder]: 81/593 cut-off events. [2022-12-13 10:59:43,324 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 10:59:43,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 648 conditions, 593 events. 81/593 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 2346 event pairs, 6 based on Foata normal form. 0/507 useless extension candidates. Maximal degree in co-relation 411. Up to 32 conditions per place. [2022-12-13 10:59:43,340 INFO L119 LiptonReduction]: Number of co-enabled transitions 27720 [2022-12-13 10:59:45,405 INFO L134 LiptonReduction]: Checked pairs total: 64685 [2022-12-13 10:59:45,405 INFO L136 LiptonReduction]: Total number of compositions: 157 [2022-12-13 10:59:45,406 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 10:59:45,407 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;@317d9fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 10:59:45,407 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 10:59:45,408 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 10:59:45,408 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 10:59:45,408 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 10:59:45,408 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 10:59:45,408 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 10:59:45,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 10:59:45,408 INFO L85 PathProgramCache]: Analyzing trace with hash 46661650, now seen corresponding path program 1 times [2022-12-13 10:59:45,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 10:59:45,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069923936] [2022-12-13 10:59:45,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 10:59:45,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 10:59:45,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 10:59:45,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 10:59:45,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 10:59:45,424 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069923936] [2022-12-13 10:59:45,425 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069923936] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 10:59:45,425 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 10:59:45,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 10:59:45,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922299745] [2022-12-13 10:59:45,425 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 10:59:45,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 10:59:45,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 10:59:45,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 10:59:45,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 10:59:45,433 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 178 out of 377 [2022-12-13 10:59:45,434 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 93 transitions, 230 flow. Second operand has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 10:59:45,434 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 10:59:45,434 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 178 of 377 [2022-12-13 10:59:45,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:04,650 INFO L130 PetriNetUnfolder]: 209692/294565 cut-off events. [2022-12-13 11:00:04,650 INFO L131 PetriNetUnfolder]: For 12142/12142 co-relation queries the response was YES. [2022-12-13 11:00:05,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 576359 conditions, 294565 events. 209692/294565 cut-off events. For 12142/12142 co-relation queries the response was YES. Maximal size of possible extension queue 6908. Compared 2328368 event pairs, 154609 based on Foata normal form. 59482/333219 useless extension candidates. Maximal degree in co-relation 55514. Up to 274909 conditions per place. [2022-12-13 11:00:05,620 INFO L137 encePairwiseOnDemand]: 348/377 looper letters, 46 selfloop transitions, 2 changer transitions 11/76 dead transitions. [2022-12-13 11:00:05,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 312 flow [2022-12-13 11:00:05,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 11:00:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 11:00:05,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 625 transitions. [2022-12-13 11:00:05,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5526083112290009 [2022-12-13 11:00:05,623 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 625 transitions. [2022-12-13 11:00:05,623 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 625 transitions. [2022-12-13 11:00:05,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:05,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 625 transitions. [2022-12-13 11:00:05,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 208.33333333333334) internal successors, (625), 3 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:05,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:05,627 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 377.0) internal successors, (1508), 4 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:05,627 INFO L175 Difference]: Start difference. First operand has 72 places, 93 transitions, 230 flow. Second operand 3 states and 625 transitions. [2022-12-13 11:00:05,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 312 flow [2022-12-13 11:00:05,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 76 transitions, 312 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 11:00:05,632 INFO L231 Difference]: Finished difference. Result has 75 places, 57 transitions, 156 flow [2022-12-13 11:00:05,633 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=75, PETRI_TRANSITIONS=57} [2022-12-13 11:00:05,633 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2022-12-13 11:00:05,633 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 57 transitions, 156 flow [2022-12-13 11:00:05,634 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 179.33333333333334) internal successors, (538), 3 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:05,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:05,634 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:05,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 11:00:05,634 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:00:05,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:05,634 INFO L85 PathProgramCache]: Analyzing trace with hash -704277008, now seen corresponding path program 1 times [2022-12-13 11:00:05,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:05,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682527478] [2022-12-13 11:00:05,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:05,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:05,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:00:05,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682527478] [2022-12-13 11:00:05,670 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682527478] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 11:00:05,670 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335935120] [2022-12-13 11:00:05,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:05,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 11:00:05,671 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 11:00:05,671 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 11:00:05,673 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 11:00:05,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:05,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 11:00:05,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 11:00:05,746 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:00:05,746 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 11:00:05,761 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:00:05,761 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335935120] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 11:00:05,761 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 11:00:05,761 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 11:00:05,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714206260] [2022-12-13 11:00:05,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 11:00:05,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 11:00:05,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:05,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 11:00:05,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 11:00:05,780 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 177 out of 377 [2022-12-13 11:00:05,782 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:05,782 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:05,783 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 177 of 377 [2022-12-13 11:00:05,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 11:00:13,338 INFO L130 PetriNetUnfolder]: 95356/128651 cut-off events. [2022-12-13 11:00:13,338 INFO L131 PetriNetUnfolder]: For 11592/11592 co-relation queries the response was YES. [2022-12-13 11:00:13,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 267500 conditions, 128651 events. 95356/128651 cut-off events. For 11592/11592 co-relation queries the response was YES. Maximal size of possible extension queue 3456. Compared 900528 event pairs, 4480 based on Foata normal form. 584/129203 useless extension candidates. Maximal degree in co-relation 34336. Up to 81829 conditions per place. [2022-12-13 11:00:13,861 INFO L137 encePairwiseOnDemand]: 373/377 looper letters, 112 selfloop transitions, 6 changer transitions 0/135 dead transitions. [2022-12-13 11:00:13,862 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 135 transitions, 552 flow [2022-12-13 11:00:13,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 11:00:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 11:00:13,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1183 transitions. [2022-12-13 11:00:13,865 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5229885057471264 [2022-12-13 11:00:13,865 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1183 transitions. [2022-12-13 11:00:13,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1183 transitions. [2022-12-13 11:00:13,865 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 11:00:13,865 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1183 transitions. [2022-12-13 11:00:13,867 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.16666666666666) internal successors, (1183), 6 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:13,869 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:13,870 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 377.0) internal successors, (2639), 7 states have internal predecessors, (2639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:13,870 INFO L175 Difference]: Start difference. First operand has 75 places, 57 transitions, 156 flow. Second operand 6 states and 1183 transitions. [2022-12-13 11:00:13,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 135 transitions, 552 flow [2022-12-13 11:00:13,879 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 135 transitions, 538 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 11:00:13,880 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 11:00:13,880 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=377, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 11:00:13,881 INFO L288 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2022-12-13 11:00:13,881 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 11:00:13,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 179.28571428571428) internal successors, (1255), 7 states have internal predecessors, (1255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:13,882 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:13,882 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 11:00:13,887 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 11:00:14,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2d06e7d0-eacf-4145-b5bb-dc4a72bd7853/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 11:00:14,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:00:14,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:14,084 INFO L85 PathProgramCache]: Analyzing trace with hash 896528828, now seen corresponding path program 1 times [2022-12-13 11:00:14,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:14,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042660378] [2022-12-13 11:00:14,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:14,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:14,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:00:14,109 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 11:00:14,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 11:00:14,119 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 11:00:14,119 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 11:00:14,120 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 11:00:14,120 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 11:00:14,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 11:00:14,120 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 11:00:14,120 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 11:00:14,120 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 11:00:14,142 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 11:00:14,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,240 INFO L130 PetriNetUnfolder]: 140/935 cut-off events. [2022-12-13 11:00:14,240 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 11:00:14,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 935 events. 140/935 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4370 event pairs, 23 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 638. Up to 80 conditions per place. [2022-12-13 11:00:14,246 INFO L82 GeneralOperation]: Start removeDead. Operand has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,250 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,250 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 11:00:14,250 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,250 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 226 places, 255 transitions, 570 flow [2022-12-13 11:00:14,345 INFO L130 PetriNetUnfolder]: 140/935 cut-off events. [2022-12-13 11:00:14,345 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 11:00:14,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1046 conditions, 935 events. 140/935 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 4370 event pairs, 23 based on Foata normal form. 0/805 useless extension candidates. Maximal degree in co-relation 638. Up to 80 conditions per place. [2022-12-13 11:00:14,375 INFO L119 LiptonReduction]: Number of co-enabled transitions 40590 [2022-12-13 11:00:16,524 INFO L134 LiptonReduction]: Checked pairs total: 97909 [2022-12-13 11:00:16,524 INFO L136 LiptonReduction]: Total number of compositions: 179 [2022-12-13 11:00:16,525 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 11:00:16,526 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;@317d9fb, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 11:00:16,526 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 11:00:16,527 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 11:00:16,527 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 11:00:16,527 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 11:00:16,527 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 11:00:16,527 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 11:00:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 11:00:16,527 INFO L85 PathProgramCache]: Analyzing trace with hash 61098700, now seen corresponding path program 1 times [2022-12-13 11:00:16,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 11:00:16,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502424240] [2022-12-13 11:00:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 11:00:16,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 11:00:16,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 11:00:16,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 11:00:16,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 11:00:16,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502424240] [2022-12-13 11:00:16,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502424240] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 11:00:16,542 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 11:00:16,542 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 11:00:16,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64853154] [2022-12-13 11:00:16,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 11:00:16,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 11:00:16,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 11:00:16,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 11:00:16,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 11:00:16,550 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 205 out of 434 [2022-12-13 11:00:16,551 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 112 transitions, 284 flow. Second operand has 3 states, 3 states have (on average 206.33333333333334) internal successors, (619), 3 states have internal predecessors, (619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 11:00:16,551 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 11:00:16,551 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 205 of 434 [2022-12-13 11:00:16,551 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand