./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version dbf71c69 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ --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 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 --- 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-dbf71c6-m [2022-10-17 11:00:11,251 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-10-17 11:00:11,254 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-10-17 11:00:11,312 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-10-17 11:00:11,313 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-10-17 11:00:11,319 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-10-17 11:00:11,321 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-10-17 11:00:11,325 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-10-17 11:00:11,328 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-10-17 11:00:11,334 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-10-17 11:00:11,335 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-10-17 11:00:11,338 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-10-17 11:00:11,339 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-10-17 11:00:11,342 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-10-17 11:00:11,344 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-10-17 11:00:11,346 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-10-17 11:00:11,348 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-10-17 11:00:11,350 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-10-17 11:00:11,352 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-10-17 11:00:11,360 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-10-17 11:00:11,362 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-10-17 11:00:11,364 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-10-17 11:00:11,368 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-10-17 11:00:11,369 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-10-17 11:00:11,380 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-10-17 11:00:11,381 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-10-17 11:00:11,381 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-10-17 11:00:11,384 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-10-17 11:00:11,384 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-10-17 11:00:11,386 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-10-17 11:00:11,386 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-10-17 11:00:11,396 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-10-17 11:00:11,398 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-10-17 11:00:11,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-10-17 11:00:11,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-10-17 11:00:11,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-10-17 11:00:11,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-10-17 11:00:11,404 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-10-17 11:00:11,404 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-10-17 11:00:11,405 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-10-17 11:00:11,406 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-10-17 11:00:11,407 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-10-17 11:00:11,471 INFO L113 SettingsManager]: Loading preferences was successful [2022-10-17 11:00:11,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-10-17 11:00:11,473 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-10-17 11:00:11,473 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-10-17 11:00:11,474 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-10-17 11:00:11,475 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-10-17 11:00:11,475 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-10-17 11:00:11,476 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-10-17 11:00:11,476 INFO L138 SettingsManager]: * Use SBE=true [2022-10-17 11:00:11,476 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-10-17 11:00:11,478 INFO L138 SettingsManager]: * sizeof long=4 [2022-10-17 11:00:11,478 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-10-17 11:00:11,478 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-10-17 11:00:11,479 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-10-17 11:00:11,479 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-10-17 11:00:11,479 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-10-17 11:00:11,479 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-10-17 11:00:11,479 INFO L138 SettingsManager]: * sizeof long double=12 [2022-10-17 11:00:11,480 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-10-17 11:00:11,480 INFO L138 SettingsManager]: * Use constant arrays=true [2022-10-17 11:00:11,480 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-10-17 11:00:11,481 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-10-17 11:00:11,481 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-10-17 11:00:11,481 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-10-17 11:00:11,481 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:11,482 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-10-17 11:00:11,483 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-10-17 11:00:11,484 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-10-17 11:00:11,484 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-10-17 11:00:11,484 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-10-17 11:00:11,485 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-10-17 11:00:11,485 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-10-17 11:00:11,485 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-10-17 11:00:11,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5eef73b6b2655059556d731e3a5babc181132142f2417a2cf863165dd8efda84 [2022-10-17 11:00:11,766 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-10-17 11:00:11,791 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-10-17 11:00:11,794 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-10-17 11:00:11,795 INFO L271 PluginConnector]: Initializing CDTParser... [2022-10-17 11:00:11,796 INFO L275 PluginConnector]: CDTParser initialized [2022-10-17 11:00:11,798 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/../../sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-10-17 11:00:11,874 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/data/2990edaf0/b88aebdb34ff4b3ba941d2035aea470b/FLAGdcf0a1b35 [2022-10-17 11:00:12,444 INFO L306 CDTParser]: Found 1 translation units. [2022-10-17 11:00:12,445 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/sv-benchmarks/c/pthread-ext/40_barrier_vf.i [2022-10-17 11:00:12,461 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/data/2990edaf0/b88aebdb34ff4b3ba941d2035aea470b/FLAGdcf0a1b35 [2022-10-17 11:00:12,700 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/data/2990edaf0/b88aebdb34ff4b3ba941d2035aea470b [2022-10-17 11:00:12,704 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-10-17 11:00:12,709 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-10-17 11:00:12,713 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:12,713 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-10-17 11:00:12,718 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-10-17 11:00:12,719 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:12" (1/1) ... [2022-10-17 11:00:12,721 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7d8d06b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:12, skipping insertion in model container [2022-10-17 11:00:12,722 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.10 11:00:12" (1/1) ... [2022-10-17 11:00:12,730 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-10-17 11:00:12,802 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-10-17 11:00:13,021 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 11:00:13,162 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-10-17 11:00:13,170 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:13,178 INFO L203 MainTranslator]: Completed pre-run [2022-10-17 11:00:13,194 WARN L611 FunctionHandler]: implicit declaration of function __builtin_bswap16 [2022-10-17 11:00:13,216 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/sv-benchmarks/c/pthread-ext/40_barrier_vf.i[31163,31176] [2022-10-17 11:00:13,218 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-10-17 11:00:13,256 INFO L208 MainTranslator]: Completed translation [2022-10-17 11:00:13,256 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13 WrapperNode [2022-10-17 11:00:13,257 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-10-17 11:00:13,258 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:13,258 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-10-17 11:00:13,258 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-10-17 11:00:13,266 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,280 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,301 INFO L138 Inliner]: procedures = 174, calls = 25, calls flagged for inlining = 10, calls inlined = 12, statements flattened = 78 [2022-10-17 11:00:13,301 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-10-17 11:00:13,302 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-10-17 11:00:13,302 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-10-17 11:00:13,302 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-10-17 11:00:13,311 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,311 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,314 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,314 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,319 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,323 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,325 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,326 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-10-17 11:00:13,330 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-10-17 11:00:13,330 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-10-17 11:00:13,330 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-10-17 11:00:13,331 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (1/1) ... [2022-10-17 11:00:13,337 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-10-17 11:00:13,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/z3 [2022-10-17 11:00:13,365 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-10-17 11:00:13,393 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_b4e404c1-be85-4e12-915d-2665c75bdc41/bin/uautomizer-J5u9QxTXDZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-10-17 11:00:13,413 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-10-17 11:00:13,414 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-10-17 11:00:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-10-17 11:00:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-10-17 11:00:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-10-17 11:00:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-10-17 11:00:13,414 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-10-17 11:00:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-10-17 11:00:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-10-17 11:00:13,415 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-10-17 11:00:13,415 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-10-17 11:00:13,417 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-10-17 11:00:13,527 INFO L235 CfgBuilder]: Building ICFG [2022-10-17 11:00:13,529 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-10-17 11:00:13,754 INFO L276 CfgBuilder]: Performing block encoding [2022-10-17 11:00:13,894 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-10-17 11:00:13,894 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-10-17 11:00:13,897 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:13 BoogieIcfgContainer [2022-10-17 11:00:13,897 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-10-17 11:00:13,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-10-17 11:00:13,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-10-17 11:00:13,912 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-10-17 11:00:13,912 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.10 11:00:12" (1/3) ... [2022-10-17 11:00:13,913 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c8574d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:13, skipping insertion in model container [2022-10-17 11:00:13,913 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.10 11:00:13" (2/3) ... [2022-10-17 11:00:13,914 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49c8574d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.10 11:00:13, skipping insertion in model container [2022-10-17 11:00:13,914 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.10 11:00:13" (3/3) ... [2022-10-17 11:00:13,919 INFO L112 eAbstractionObserver]: Analyzing ICFG 40_barrier_vf.i [2022-10-17 11:00:13,934 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-10-17 11:00:13,947 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-10-17 11:00:13,947 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-10-17 11:00:13,947 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-10-17 11:00:14,027 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:00:14,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 54 transitions, 113 flow [2022-10-17 11:00:14,163 INFO L130 PetriNetUnfolder]: 4/65 cut-off events. [2022-10-17 11:00:14,163 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 11:00:14,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70 conditions, 65 events. 4/65 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 65 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 36. Up to 4 conditions per place. [2022-10-17 11:00:14,167 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 54 transitions, 113 flow [2022-10-17 11:00:14,172 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 54 places, 54 transitions, 113 flow [2022-10-17 11:00:14,185 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:14,196 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;@2e0167d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:14,196 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-10-17 11:00:14,229 INFO L130 PetriNetUnfolder]: 2/46 cut-off events. [2022-10-17 11:00:14,229 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-10-17 11:00:14,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:14,230 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:14,231 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-10-17 11:00:14,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:14,237 INFO L85 PathProgramCache]: Analyzing trace with hash -1260215165, now seen corresponding path program 1 times [2022-10-17 11:00:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:14,251 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519816843] [2022-10-17 11:00:14,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:14,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:14,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:14,380 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:00:14,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:14,429 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:00:14,432 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:00:14,433 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-10-17 11:00:14,436 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-10-17 11:00:14,437 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-10-17 11:00:14,437 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-10-17 11:00:14,438 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-10-17 11:00:14,443 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:00:14,443 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-10-17 11:00:14,468 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:00:14,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 78 places, 78 transitions, 168 flow [2022-10-17 11:00:14,504 INFO L130 PetriNetUnfolder]: 7/102 cut-off events. [2022-10-17 11:00:14,505 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-10-17 11:00:14,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 112 conditions, 102 events. 7/102 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 198 event pairs, 0 based on Foata normal form. 0/90 useless extension candidates. Maximal degree in co-relation 66. Up to 6 conditions per place. [2022-10-17 11:00:14,507 INFO L82 GeneralOperation]: Start removeDead. Operand has 78 places, 78 transitions, 168 flow [2022-10-17 11:00:14,509 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 78 transitions, 168 flow [2022-10-17 11:00:14,511 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:14,513 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;@2e0167d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:14,513 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-10-17 11:00:14,532 INFO L130 PetriNetUnfolder]: 5/75 cut-off events. [2022-10-17 11:00:14,533 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:00:14,533 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:14,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:14,534 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 11:00:14,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:14,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1346439990, now seen corresponding path program 1 times [2022-10-17 11:00:14,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:14,535 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356308178] [2022-10-17 11:00:14,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:14,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:14,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:14,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:14,909 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:14,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356308178] [2022-10-17 11:00:14,910 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356308178] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:14,910 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:14,910 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:00:14,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803245404] [2022-10-17 11:00:14,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:14,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:00:14,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:14,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:00:14,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:14,958 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 45 out of 78 [2022-10-17 11:00:14,961 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 78 transitions, 168 flow. Second operand has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2022-10-17 11:00:14,962 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:00:14,962 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 45 of 78 [2022-10-17 11:00:14,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:00:15,497 INFO L130 PetriNetUnfolder]: 191/585 cut-off events. [2022-10-17 11:00:15,498 INFO L131 PetriNetUnfolder]: For 35/35 co-relation queries the response was YES. [2022-10-17 11:00:15,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 585 events. 191/585 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 3407 event pairs, 26 based on Foata normal form. 290/850 useless extension candidates. Maximal degree in co-relation 931. Up to 168 conditions per place. [2022-10-17 11:00:15,510 INFO L137 encePairwiseOnDemand]: 63/78 looper letters, 67 selfloop transitions, 17 changer transitions 0/120 dead transitions. [2022-10-17 11:00:15,511 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 120 transitions, 435 flow [2022-10-17 11:00:15,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:00:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 11:00:15,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 434 transitions. [2022-10-17 11:00:15,538 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7948717948717948 [2022-10-17 11:00:15,539 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 434 transitions. [2022-10-17 11:00:15,543 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 434 transitions. [2022-10-17 11:00:15,548 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:00:15,551 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 434 transitions. [2022-10-17 11:00:15,558 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 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) [2022-10-17 11:00:15,566 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 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) [2022-10-17 11:00:15,568 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 78.0) internal successors, (624), 8 states have internal predecessors, (624), 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) [2022-10-17 11:00:15,570 INFO L175 Difference]: Start difference. First operand has 78 places, 78 transitions, 168 flow. Second operand 7 states and 434 transitions. [2022-10-17 11:00:15,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 120 transitions, 435 flow [2022-10-17 11:00:15,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 120 transitions, 433 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-10-17 11:00:15,592 INFO L231 Difference]: Finished difference. Result has 74 places, 77 transitions, 243 flow [2022-10-17 11:00:15,594 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=243, PETRI_PLACES=74, PETRI_TRANSITIONS=77} [2022-10-17 11:00:15,601 INFO L287 CegarLoopForPetriNet]: 78 programPoint places, -4 predicate places. [2022-10-17 11:00:15,601 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 77 transitions, 243 flow [2022-10-17 11:00:15,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 47.0) internal successors, (235), 5 states have internal predecessors, (235), 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) [2022-10-17 11:00:15,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:15,602 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:15,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-10-17 11:00:15,603 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-10-17 11:00:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:15,605 INFO L85 PathProgramCache]: Analyzing trace with hash -205340232, now seen corresponding path program 1 times [2022-10-17 11:00:15,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:15,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796492708] [2022-10-17 11:00:15,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:15,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:15,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:15,655 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:00:15,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:15,690 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:00:15,690 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:00:15,691 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-10-17 11:00:15,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-10-17 11:00:15,691 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-10-17 11:00:15,692 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-10-17 11:00:15,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-10-17 11:00:15,692 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1] [2022-10-17 11:00:15,693 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:00:15,693 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-10-17 11:00:15,737 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:00:15,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 102 places, 102 transitions, 225 flow [2022-10-17 11:00:15,777 INFO L130 PetriNetUnfolder]: 10/139 cut-off events. [2022-10-17 11:00:15,777 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-10-17 11:00:15,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 139 events. 10/139 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 310 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 106. Up to 8 conditions per place. [2022-10-17 11:00:15,780 INFO L82 GeneralOperation]: Start removeDead. Operand has 102 places, 102 transitions, 225 flow [2022-10-17 11:00:15,782 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 225 flow [2022-10-17 11:00:15,786 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:15,788 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;@2e0167d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:15,791 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-10-17 11:00:15,803 INFO L130 PetriNetUnfolder]: 5/76 cut-off events. [2022-10-17 11:00:15,803 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:00:15,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:15,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:15,804 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:00:15,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:15,805 INFO L85 PathProgramCache]: Analyzing trace with hash -235705645, now seen corresponding path program 1 times [2022-10-17 11:00:15,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:15,806 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539367975] [2022-10-17 11:00:15,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:15,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:15,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:16,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:16,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:16,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539367975] [2022-10-17 11:00:16,098 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539367975] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:16,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:16,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:00:16,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945208384] [2022-10-17 11:00:16,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:16,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:00:16,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:16,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:00:16,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:16,102 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2022-10-17 11:00:16,103 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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) [2022-10-17 11:00:16,103 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:00:16,103 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2022-10-17 11:00:16,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:00:18,616 INFO L130 PetriNetUnfolder]: 5046/10092 cut-off events. [2022-10-17 11:00:18,616 INFO L131 PetriNetUnfolder]: For 1456/1456 co-relation queries the response was YES. [2022-10-17 11:00:18,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19018 conditions, 10092 events. 5046/10092 cut-off events. For 1456/1456 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 88416 event pairs, 965 based on Foata normal form. 3867/13488 useless extension candidates. Maximal degree in co-relation 4759. Up to 3530 conditions per place. [2022-10-17 11:00:18,774 INFO L137 encePairwiseOnDemand]: 82/102 looper letters, 132 selfloop transitions, 25 changer transitions 0/201 dead transitions. [2022-10-17 11:00:18,774 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 201 transitions, 787 flow [2022-10-17 11:00:18,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:00:18,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 11:00:18,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 594 transitions. [2022-10-17 11:00:18,778 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8319327731092437 [2022-10-17 11:00:18,778 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 594 transitions. [2022-10-17 11:00:18,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 594 transitions. [2022-10-17 11:00:18,779 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:00:18,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 594 transitions. [2022-10-17 11:00:18,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 84.85714285714286) internal successors, (594), 7 states have internal predecessors, (594), 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) [2022-10-17 11:00:18,785 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 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) [2022-10-17 11:00:18,787 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 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) [2022-10-17 11:00:18,787 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 225 flow. Second operand 7 states and 594 transitions. [2022-10-17 11:00:18,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 201 transitions, 787 flow [2022-10-17 11:00:18,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 201 transitions, 771 flow, removed 8 selfloop flow, removed 0 redundant places. [2022-10-17 11:00:18,800 INFO L231 Difference]: Finished difference. Result has 95 places, 109 transitions, 371 flow [2022-10-17 11:00:18,801 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=371, PETRI_PLACES=95, PETRI_TRANSITIONS=109} [2022-10-17 11:00:18,802 INFO L287 CegarLoopForPetriNet]: 102 programPoint places, -7 predicate places. [2022-10-17 11:00:18,802 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 109 transitions, 371 flow [2022-10-17 11:00:18,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.0) internal successors, (285), 5 states have internal predecessors, (285), 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) [2022-10-17 11:00:18,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:18,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:18,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-10-17 11:00:18,804 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:00:18,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:18,805 INFO L85 PathProgramCache]: Analyzing trace with hash -514918960, now seen corresponding path program 1 times [2022-10-17 11:00:18,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:18,805 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340370144] [2022-10-17 11:00:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:18,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:18,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:18,983 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:18,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340370144] [2022-10-17 11:00:18,984 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340370144] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:18,984 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:18,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-10-17 11:00:18,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067678043] [2022-10-17 11:00:18,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:18,986 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-10-17 11:00:18,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:18,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-10-17 11:00:18,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-10-17 11:00:18,988 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 102 [2022-10-17 11:00:18,989 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 109 transitions, 371 flow. Second operand has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-10-17 11:00:18,989 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:00:18,989 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 102 [2022-10-17 11:00:18,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:00:20,033 INFO L130 PetriNetUnfolder]: 1981/4991 cut-off events. [2022-10-17 11:00:20,033 INFO L131 PetriNetUnfolder]: For 1074/1132 co-relation queries the response was YES. [2022-10-17 11:00:20,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9854 conditions, 4991 events. 1981/4991 cut-off events. For 1074/1132 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 47391 event pairs, 666 based on Foata normal form. 194/4904 useless extension candidates. Maximal degree in co-relation 9782. Up to 1572 conditions per place. [2022-10-17 11:00:20,117 INFO L137 encePairwiseOnDemand]: 92/102 looper letters, 37 selfloop transitions, 7 changer transitions 0/128 dead transitions. [2022-10-17 11:00:20,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 128 transitions, 502 flow [2022-10-17 11:00:20,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-10-17 11:00:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-10-17 11:00:20,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 245 transitions. [2022-10-17 11:00:20,121 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.8006535947712419 [2022-10-17 11:00:20,121 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 245 transitions. [2022-10-17 11:00:20,121 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 245 transitions. [2022-10-17 11:00:20,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:00:20,122 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 245 transitions. [2022-10-17 11:00:20,123 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 81.66666666666667) internal successors, (245), 3 states have internal predecessors, (245), 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) [2022-10-17 11:00:20,124 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2022-10-17 11:00:20,125 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 102.0) internal successors, (408), 4 states have internal predecessors, (408), 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) [2022-10-17 11:00:20,125 INFO L175 Difference]: Start difference. First operand has 95 places, 109 transitions, 371 flow. Second operand 3 states and 245 transitions. [2022-10-17 11:00:20,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 128 transitions, 502 flow [2022-10-17 11:00:20,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 128 transitions, 502 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-10-17 11:00:20,137 INFO L231 Difference]: Finished difference. Result has 99 places, 115 transitions, 429 flow [2022-10-17 11:00:20,138 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=429, PETRI_PLACES=99, PETRI_TRANSITIONS=115} [2022-10-17 11:00:20,140 INFO L287 CegarLoopForPetriNet]: 102 programPoint places, -3 predicate places. [2022-10-17 11:00:20,141 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 115 transitions, 429 flow [2022-10-17 11:00:20,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.66666666666667) internal successors, (206), 3 states have internal predecessors, (206), 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) [2022-10-17 11:00:20,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:20,142 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:20,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-10-17 11:00:20,143 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:00:20,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:20,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2097732028, now seen corresponding path program 1 times [2022-10-17 11:00:20,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:20,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429931633] [2022-10-17 11:00:20,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:20,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:20,348 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-10-17 11:00:20,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:20,349 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429931633] [2022-10-17 11:00:20,349 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429931633] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:20,349 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:20,350 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:00:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485296487] [2022-10-17 11:00:20,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:20,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:00:20,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:20,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:00:20,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:20,353 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 102 [2022-10-17 11:00:20,354 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 115 transitions, 429 flow. Second operand has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 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) [2022-10-17 11:00:20,354 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:00:20,354 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 102 [2022-10-17 11:00:20,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-10-17 11:00:22,861 INFO L130 PetriNetUnfolder]: 5383/11464 cut-off events. [2022-10-17 11:00:22,862 INFO L131 PetriNetUnfolder]: For 9233/9376 co-relation queries the response was YES. [2022-10-17 11:00:22,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27706 conditions, 11464 events. 5383/11464 cut-off events. For 9233/9376 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 106403 event pairs, 1358 based on Foata normal form. 310/11657 useless extension candidates. Maximal degree in co-relation 27612. Up to 3984 conditions per place. [2022-10-17 11:00:23,180 INFO L137 encePairwiseOnDemand]: 90/102 looper letters, 142 selfloop transitions, 49 changer transitions 0/245 dead transitions. [2022-10-17 11:00:23,180 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 245 transitions, 1257 flow [2022-10-17 11:00:23,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-10-17 11:00:23,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-10-17 11:00:23,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 545 transitions. [2022-10-17 11:00:23,186 INFO L522 CegarLoopForPetriNet]: DFA transition density 0.7633053221288515 [2022-10-17 11:00:23,187 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 545 transitions. [2022-10-17 11:00:23,187 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 545 transitions. [2022-10-17 11:00:23,188 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-10-17 11:00:23,188 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 545 transitions. [2022-10-17 11:00:23,190 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 77.85714285714286) internal successors, (545), 7 states have internal predecessors, (545), 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) [2022-10-17 11:00:23,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 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) [2022-10-17 11:00:23,194 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 102.0) internal successors, (816), 8 states have internal predecessors, (816), 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) [2022-10-17 11:00:23,194 INFO L175 Difference]: Start difference. First operand has 99 places, 115 transitions, 429 flow. Second operand 7 states and 545 transitions. [2022-10-17 11:00:23,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 245 transitions, 1257 flow [2022-10-17 11:00:23,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 245 transitions, 1243 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-10-17 11:00:23,245 INFO L231 Difference]: Finished difference. Result has 107 places, 149 transitions, 772 flow [2022-10-17 11:00:23,246 INFO L270 CegarLoopForPetriNet]: {PETRI_ALPHABET=102, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=772, PETRI_PLACES=107, PETRI_TRANSITIONS=149} [2022-10-17 11:00:23,251 INFO L287 CegarLoopForPetriNet]: 102 programPoint places, 5 predicate places. [2022-10-17 11:00:23,251 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 149 transitions, 772 flow [2022-10-17 11:00:23,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 57.2) internal successors, (286), 5 states have internal predecessors, (286), 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) [2022-10-17 11:00:23,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:23,252 INFO L208 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:23,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-10-17 11:00:23,253 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-10-17 11:00:23,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:23,254 INFO L85 PathProgramCache]: Analyzing trace with hash 1063597154, now seen corresponding path program 1 times [2022-10-17 11:00:23,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:23,254 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029106389] [2022-10-17 11:00:23,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:23,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:23,292 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-10-17 11:00:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-10-17 11:00:23,326 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-10-17 11:00:23,330 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-10-17 11:00:23,331 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-10-17 11:00:23,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-10-17 11:00:23,331 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-10-17 11:00:23,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-10-17 11:00:23,332 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-10-17 11:00:23,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-10-17 11:00:23,332 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-10-17 11:00:23,333 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-10-17 11:00:23,333 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-10-17 11:00:23,383 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-10-17 11:00:23,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 126 places, 126 transitions, 284 flow [2022-10-17 11:00:23,421 INFO L130 PetriNetUnfolder]: 13/176 cut-off events. [2022-10-17 11:00:23,421 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-10-17 11:00:23,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 199 conditions, 176 events. 13/176 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 462 event pairs, 0 based on Foata normal form. 0/154 useless extension candidates. Maximal degree in co-relation 147. Up to 10 conditions per place. [2022-10-17 11:00:23,423 INFO L82 GeneralOperation]: Start removeDead. Operand has 126 places, 126 transitions, 284 flow [2022-10-17 11:00:23,427 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 126 places, 126 transitions, 284 flow [2022-10-17 11:00:23,428 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-10-17 11:00:23,438 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;@2e0167d9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-10-17 11:00:23,439 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-10-17 11:00:23,446 INFO L130 PetriNetUnfolder]: 5/76 cut-off events. [2022-10-17 11:00:23,446 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-10-17 11:00:23,446 INFO L200 CegarLoopForPetriNet]: Found error trace [2022-10-17 11:00:23,446 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-10-17 11:00:23,447 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-10-17 11:00:23,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-10-17 11:00:23,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1138658637, now seen corresponding path program 1 times [2022-10-17 11:00:23,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-10-17 11:00:23,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701922872] [2022-10-17 11:00:23,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-10-17 11:00:23,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-10-17 11:00:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-10-17 11:00:23,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-10-17 11:00:23,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-10-17 11:00:23,600 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701922872] [2022-10-17 11:00:23,600 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701922872] provided 1 perfect and 0 imperfect interpolant sequences [2022-10-17 11:00:23,600 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-10-17 11:00:23,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-10-17 11:00:23,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374042054] [2022-10-17 11:00:23,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-10-17 11:00:23,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-10-17 11:00:23,601 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-10-17 11:00:23,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-10-17 11:00:23,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-10-17 11:00:23,603 INFO L477 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 126 [2022-10-17 11:00:23,604 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 126 transitions, 284 flow. Second operand has 5 states, 5 states have (on average 67.0) internal successors, (335), 5 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) [2022-10-17 11:00:23,604 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-10-17 11:00:23,604 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 126 [2022-10-17 11:00:23,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand