./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/14_spin2003.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 2329fc70 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/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_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/14_spin2003.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/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_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/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 f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e --- 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 17:37:04,219 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 17:37:04,221 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 17:37:04,240 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 17:37:04,240 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 17:37:04,241 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 17:37:04,242 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 17:37:04,244 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 17:37:04,245 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 17:37:04,246 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 17:37:04,247 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 17:37:04,248 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 17:37:04,248 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 17:37:04,249 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 17:37:04,250 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 17:37:04,251 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 17:37:04,252 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 17:37:04,253 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 17:37:04,255 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 17:37:04,256 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 17:37:04,258 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 17:37:04,259 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 17:37:04,260 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 17:37:04,261 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 17:37:04,264 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 17:37:04,264 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 17:37:04,265 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 17:37:04,266 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 17:37:04,266 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 17:37:04,268 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 17:37:04,268 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 17:37:04,269 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 17:37:04,270 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 17:37:04,271 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 17:37:04,272 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 17:37:04,272 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 17:37:04,272 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 17:37:04,272 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 17:37:04,273 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 17:37:04,273 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 17:37:04,274 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 17:37:04,274 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 17:37:04,296 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 17:37:04,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 17:37:04,297 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 17:37:04,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 17:37:04,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 17:37:04,298 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 17:37:04,298 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 17:37:04,299 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 17:37:04,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 17:37:04,300 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 17:37:04,300 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:37:04,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 17:37:04,301 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 17:37:04,302 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 17:37:04,302 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 17:37:04,302 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 17:37:04,302 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_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f5ed9d077a05ec08544f0d3c902eb6b5aa6ad768c4ec69a1caaef2b54748a07e [2022-12-13 17:37:04,495 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 17:37:04,512 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 17:37:04,515 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 17:37:04,516 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 17:37:04,517 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 17:37:04,518 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-12-13 17:37:07,046 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 17:37:07,256 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 17:37:07,257 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/sv-benchmarks/c/pthread-ext/14_spin2003.i [2022-12-13 17:37:07,269 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/data/26d9ce5f6/a526e02a5817486b9f700fcffb8f985c/FLAGbbe0818a2 [2022-12-13 17:37:07,618 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/data/26d9ce5f6/a526e02a5817486b9f700fcffb8f985c [2022-12-13 17:37:07,620 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 17:37:07,622 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 17:37:07,623 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 17:37:07,623 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 17:37:07,626 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 17:37:07,626 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,627 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5fbafaef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07, skipping insertion in model container [2022-12-13 17:37:07,627 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 17:37:07,654 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 17:37:07,849 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_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-12-13 17:37:07,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:37:07,862 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 17:37:07,885 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_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/sv-benchmarks/c/pthread-ext/14_spin2003.i[30203,30216] [2022-12-13 17:37:07,887 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 17:37:07,906 INFO L208 MainTranslator]: Completed translation [2022-12-13 17:37:07,906 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07 WrapperNode [2022-12-13 17:37:07,907 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 17:37:07,907 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 17:37:07,907 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 17:37:07,907 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 17:37:07,913 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,921 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,934 INFO L138 Inliner]: procedures = 169, calls = 14, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 47 [2022-12-13 17:37:07,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 17:37:07,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 17:37:07,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 17:37:07,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 17:37:07,940 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,941 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,945 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,947 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,948 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,948 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,950 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 17:37:07,950 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 17:37:07,951 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 17:37:07,951 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 17:37:07,951 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (1/1) ... [2022-12-13 17:37:07,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 17:37:07,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 17:37:07,974 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 17:37:07,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ef79b1a-b45c-460b-9325-f0e1555ad0ca/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 17:37:08,007 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-12-13 17:37:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 17:37:08,008 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 17:37:08,008 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 17:37:08,009 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 17:37:08,096 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 17:37:08,098 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 17:37:08,175 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 17:37:08,204 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 17:37:08,204 INFO L300 CfgBuilder]: Removed 1 assume(true) statements. [2022-12-13 17:37:08,205 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:37:08 BoogieIcfgContainer [2022-12-13 17:37:08,206 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 17:37:08,207 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 17:37:08,207 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 17:37:08,210 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 17:37:08,210 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 05:37:07" (1/3) ... [2022-12-13 17:37:08,210 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5f0337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:37:08, skipping insertion in model container [2022-12-13 17:37:08,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 05:37:07" (2/3) ... [2022-12-13 17:37:08,211 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f5f0337 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 05:37:08, skipping insertion in model container [2022-12-13 17:37:08,211 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 05:37:08" (3/3) ... [2022-12-13 17:37:08,212 INFO L112 eAbstractionObserver]: Analyzing ICFG 14_spin2003.i [2022-12-13 17:37:08,218 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 17:37:08,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 17:37:08,226 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 17:37:08,226 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 17:37:08,258 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:08,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,306 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-12-13 17:37:08,306 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:37:08,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-12-13 17:37:08,309 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,312 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,315 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:08,323 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,325 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,325 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 42 transitions, 89 flow [2022-12-13 17:37:08,336 INFO L130 PetriNetUnfolder]: 3/53 cut-off events. [2022-12-13 17:37:08,336 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:37:08,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 53 events. 3/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 68 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 26. Up to 4 conditions per place. [2022-12-13 17:37:08,337 INFO L119 LiptonReduction]: Number of co-enabled transitions 336 [2022-12-13 17:37:09,252 INFO L134 LiptonReduction]: Checked pairs total: 278 [2022-12-13 17:37:09,252 INFO L136 LiptonReduction]: Total number of compositions: 42 [2022-12-13 17:37:09,267 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:09,273 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:09,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-12-13 17:37:09,276 INFO L130 PetriNetUnfolder]: 0/5 cut-off events. [2022-12-13 17:37:09,276 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:37:09,276 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:09,277 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 17:37:09,277 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:37:09,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:09,282 INFO L85 PathProgramCache]: Analyzing trace with hash 7157910, now seen corresponding path program 1 times [2022-12-13 17:37:09,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:09,289 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141306260] [2022-12-13 17:37:09,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:09,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:09,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:09,417 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 17:37:09,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:09,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141306260] [2022-12-13 17:37:09,418 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141306260] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:09,418 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:09,418 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2022-12-13 17:37:09,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236456468] [2022-12-13 17:37:09,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:09,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-12-13 17:37:09,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:09,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-12-13 17:37:09,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-12-13 17:37:09,445 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 84 [2022-12-13 17:37:09,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 11 places, 8 transitions, 21 flow. Second operand has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 17:37:09,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:09,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 84 [2022-12-13 17:37:09,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:09,461 INFO L130 PetriNetUnfolder]: 2/11 cut-off events. [2022-12-13 17:37:09,461 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 17:37:09,462 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27 conditions, 11 events. 2/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 9 event pairs, 2 based on Foata normal form. 0/11 useless extension candidates. Maximal degree in co-relation 14. Up to 11 conditions per place. [2022-12-13 17:37:09,463 INFO L137 encePairwiseOnDemand]: 82/84 looper letters, 5 selfloop transitions, 0 changer transitions 0/6 dead transitions. [2022-12-13 17:37:09,463 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 10 places, 6 transitions, 27 flow [2022-12-13 17:37:09,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-12-13 17:37:09,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-12-13 17:37:09,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 77 transitions. [2022-12-13 17:37:09,475 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2022-12-13 17:37:09,475 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 77 transitions. [2022-12-13 17:37:09,475 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 77 transitions. [2022-12-13 17:37:09,476 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:09,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 77 transitions. [2022-12-13 17:37:09,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 38.5) internal successors, (77), 2 states have internal predecessors, (77), 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 17:37:09,482 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 17:37:09,482 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 84.0) internal successors, (252), 3 states have internal predecessors, (252), 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 17:37:09,483 INFO L175 Difference]: Start difference. First operand has 11 places, 8 transitions, 21 flow. Second operand 2 states and 77 transitions. [2022-12-13 17:37:09,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 10 places, 6 transitions, 27 flow [2022-12-13 17:37:09,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 10 places, 6 transitions, 27 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 17:37:09,486 INFO L231 Difference]: Finished difference. Result has 10 places, 6 transitions, 17 flow [2022-12-13 17:37:09,487 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=84, PETRI_DIFFERENCE_MINUEND_FLOW=17, PETRI_DIFFERENCE_MINUEND_PLACES=9, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=6, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=17, PETRI_PLACES=10, PETRI_TRANSITIONS=6} [2022-12-13 17:37:09,489 INFO L288 CegarLoopForPetriNet]: 11 programPoint places, -1 predicate places. [2022-12-13 17:37:09,490 INFO L495 AbstractCegarLoop]: Abstraction has has 10 places, 6 transitions, 17 flow [2022-12-13 17:37:09,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 37.0) internal successors, (74), 2 states have internal predecessors, (74), 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 17:37:09,490 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:09,490 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 17:37:09,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 17:37:09,490 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-12-13 17:37:09,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:09,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1711202049, now seen corresponding path program 1 times [2022-12-13 17:37:09,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:09,491 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390795370] [2022-12-13 17:37:09,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:09,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:09,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:09,513 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:37:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:09,542 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:37:09,542 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:37:09,543 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-12-13 17:37:09,545 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-12-13 17:37:09,546 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-12-13 17:37:09,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 17:37:09,546 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:37:09,549 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:37:09,549 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 17:37:09,561 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:09,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,579 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-12-13 17:37:09,579 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:37:09,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-12-13 17:37:09,580 INFO L82 GeneralOperation]: Start removeDead. Operand has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,581 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,582 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:09,582 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,582 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 122 flow [2022-12-13 17:37:09,595 INFO L130 PetriNetUnfolder]: 5/79 cut-off events. [2022-12-13 17:37:09,595 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-12-13 17:37:09,596 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 79 events. 5/79 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 125 event pairs, 0 based on Foata normal form. 0/69 useless extension candidates. Maximal degree in co-relation 54. Up to 6 conditions per place. [2022-12-13 17:37:09,597 INFO L119 LiptonReduction]: Number of co-enabled transitions 984 [2022-12-13 17:37:10,199 INFO L134 LiptonReduction]: Checked pairs total: 2927 [2022-12-13 17:37:10,199 INFO L136 LiptonReduction]: Total number of compositions: 39 [2022-12-13 17:37:10,200 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:10,201 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:10,201 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-12-13 17:37:10,203 INFO L130 PetriNetUnfolder]: 0/12 cut-off events. [2022-12-13 17:37:10,203 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:37:10,203 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:10,203 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:10,203 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-12-13 17:37:10,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:10,204 INFO L85 PathProgramCache]: Analyzing trace with hash -2018563332, now seen corresponding path program 1 times [2022-12-13 17:37:10,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:10,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383217253] [2022-12-13 17:37:10,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:10,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:10,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:10,250 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 17:37:10,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:10,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383217253] [2022-12-13 17:37:10,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383217253] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:10,250 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:10,250 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:37:10,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511691658] [2022-12-13 17:37:10,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:10,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:10,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:10,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:10,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:10,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 94 [2022-12-13 17:37:10,261 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 22 transitions, 56 flow. Second operand has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 17:37:10,261 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:10,261 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 94 [2022-12-13 17:37:10,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:10,304 INFO L130 PetriNetUnfolder]: 97/220 cut-off events. [2022-12-13 17:37:10,304 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 17:37:10,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 445 conditions, 220 events. 97/220 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1018 event pairs, 61 based on Foata normal form. 14/227 useless extension candidates. Maximal degree in co-relation 164. Up to 143 conditions per place. [2022-12-13 17:37:10,306 INFO L137 encePairwiseOnDemand]: 85/94 looper letters, 21 selfloop transitions, 5 changer transitions 0/30 dead transitions. [2022-12-13 17:37:10,306 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 30 transitions, 129 flow [2022-12-13 17:37:10,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:10,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 140 transitions. [2022-12-13 17:37:10,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49645390070921985 [2022-12-13 17:37:10,307 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 140 transitions. [2022-12-13 17:37:10,308 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 140 transitions. [2022-12-13 17:37:10,308 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:10,308 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 140 transitions. [2022-12-13 17:37:10,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 46.666666666666664) internal successors, (140), 3 states have internal predecessors, (140), 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 17:37:10,309 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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 17:37:10,309 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 94.0) internal successors, (376), 4 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 17:37:10,309 INFO L175 Difference]: Start difference. First operand has 26 places, 22 transitions, 56 flow. Second operand 3 states and 140 transitions. [2022-12-13 17:37:10,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 30 transitions, 129 flow [2022-12-13 17:37:10,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 30 transitions, 127 flow, removed 1 selfloop flow, removed 0 redundant places. [2022-12-13 17:37:10,310 INFO L231 Difference]: Finished difference. Result has 28 places, 23 transitions, 88 flow [2022-12-13 17:37:10,310 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=94, PETRI_DIFFERENCE_MINUEND_FLOW=48, PETRI_DIFFERENCE_MINUEND_PLACES=24, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=19, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=28, PETRI_TRANSITIONS=23} [2022-12-13 17:37:10,311 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 2 predicate places. [2022-12-13 17:37:10,311 INFO L495 AbstractCegarLoop]: Abstraction has has 28 places, 23 transitions, 88 flow [2022-12-13 17:37:10,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.333333333333336) internal successors, (115), 3 states have internal predecessors, (115), 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 17:37:10,311 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:10,311 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 17:37:10,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 17:37:10,312 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)] === [2022-12-13 17:37:10,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:10,312 INFO L85 PathProgramCache]: Analyzing trace with hash 105718798, now seen corresponding path program 1 times [2022-12-13 17:37:10,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:10,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269249172] [2022-12-13 17:37:10,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:10,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:10,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:10,323 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:37:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:10,332 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:37:10,332 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:37:10,333 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-12-13 17:37:10,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-12-13 17:37:10,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-12-13 17:37:10,333 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-12-13 17:37:10,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-12-13 17:37:10,333 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 17:37:10,334 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:37:10,334 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 17:37:10,347 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:10,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,360 INFO L130 PetriNetUnfolder]: 7/105 cut-off events. [2022-12-13 17:37:10,360 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:37:10,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-12-13 17:37:10,361 INFO L82 GeneralOperation]: Start removeDead. Operand has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,361 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:10,362 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,362 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 71 places, 68 transitions, 157 flow [2022-12-13 17:37:10,369 INFO L130 PetriNetUnfolder]: 7/105 cut-off events. [2022-12-13 17:37:10,369 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-12-13 17:37:10,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 105 events. 7/105 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 195 event pairs, 0 based on Foata normal form. 0/91 useless extension candidates. Maximal degree in co-relation 83. Up to 8 conditions per place. [2022-12-13 17:37:10,370 INFO L119 LiptonReduction]: Number of co-enabled transitions 1944 [2022-12-13 17:37:11,043 INFO L134 LiptonReduction]: Checked pairs total: 7748 [2022-12-13 17:37:11,043 INFO L136 LiptonReduction]: Total number of compositions: 48 [2022-12-13 17:37:11,044 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:11,045 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:11,045 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-12-13 17:37:11,047 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-12-13 17:37:11,047 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:37:11,047 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:11,047 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:11,048 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:37:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:11,048 INFO L85 PathProgramCache]: Analyzing trace with hash 283972056, now seen corresponding path program 1 times [2022-12-13 17:37:11,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:11,048 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503076889] [2022-12-13 17:37:11,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:11,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:11,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:11,090 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 17:37:11,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503076889] [2022-12-13 17:37:11,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503076889] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:11,091 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:11,091 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:37:11,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325479969] [2022-12-13 17:37:11,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:11,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:11,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:11,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 116 [2022-12-13 17:37:11,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 87 flow. Second operand has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 17:37:11,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:11,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 116 [2022-12-13 17:37:11,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:11,288 INFO L130 PetriNetUnfolder]: 966/1762 cut-off events. [2022-12-13 17:37:11,288 INFO L131 PetriNetUnfolder]: For 283/283 co-relation queries the response was YES. [2022-12-13 17:37:11,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3546 conditions, 1762 events. 966/1762 cut-off events. For 283/283 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 11519 event pairs, 535 based on Foata normal form. 242/1965 useless extension candidates. Maximal degree in co-relation 564. Up to 993 conditions per place. [2022-12-13 17:37:11,299 INFO L137 encePairwiseOnDemand]: 102/116 looper letters, 28 selfloop transitions, 7 changer transitions 0/41 dead transitions. [2022-12-13 17:37:11,299 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 41 transitions, 185 flow [2022-12-13 17:37:11,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:11,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:11,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2022-12-13 17:37:11,301 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48563218390804597 [2022-12-13 17:37:11,301 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 169 transitions. [2022-12-13 17:37:11,301 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 169 transitions. [2022-12-13 17:37:11,302 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:11,302 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 169 transitions. [2022-12-13 17:37:11,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 56.333333333333336) internal successors, (169), 3 states have internal predecessors, (169), 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 17:37:11,304 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 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 17:37:11,305 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 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 17:37:11,305 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 87 flow. Second operand 3 states and 169 transitions. [2022-12-13 17:37:11,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 41 transitions, 185 flow [2022-12-13 17:37:11,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 41 transitions, 177 flow, removed 4 selfloop flow, removed 0 redundant places. [2022-12-13 17:37:11,307 INFO L231 Difference]: Finished difference. Result has 37 places, 32 transitions, 125 flow [2022-12-13 17:37:11,307 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=67, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=125, PETRI_PLACES=37, PETRI_TRANSITIONS=32} [2022-12-13 17:37:11,308 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, 0 predicate places. [2022-12-13 17:37:11,308 INFO L495 AbstractCegarLoop]: Abstraction has has 37 places, 32 transitions, 125 flow [2022-12-13 17:37:11,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.333333333333336) internal successors, (130), 3 states have internal predecessors, (130), 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 17:37:11,309 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:11,309 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:11,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 17:37:11,309 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:37:11,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:11,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1460758312, now seen corresponding path program 1 times [2022-12-13 17:37:11,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:11,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086330542] [2022-12-13 17:37:11,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:11,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:11,398 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:37:11,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:11,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086330542] [2022-12-13 17:37:11,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086330542] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:11,399 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:11,399 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:37:11,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705561545] [2022-12-13 17:37:11,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:11,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:11,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:11,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:11,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:11,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 50 out of 116 [2022-12-13 17:37:11,402 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 32 transitions, 125 flow. Second operand has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 17:37:11,403 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:11,403 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 50 of 116 [2022-12-13 17:37:11,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:11,442 INFO L130 PetriNetUnfolder]: 49/233 cut-off events. [2022-12-13 17:37:11,442 INFO L131 PetriNetUnfolder]: For 61/61 co-relation queries the response was YES. [2022-12-13 17:37:11,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 233 events. 49/233 cut-off events. For 61/61 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1155 event pairs, 27 based on Foata normal form. 28/256 useless extension candidates. Maximal degree in co-relation 311. Up to 58 conditions per place. [2022-12-13 17:37:11,444 INFO L137 encePairwiseOnDemand]: 110/116 looper letters, 8 selfloop transitions, 6 changer transitions 0/26 dead transitions. [2022-12-13 17:37:11,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 26 transitions, 133 flow [2022-12-13 17:37:11,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:11,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:11,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 167 transitions. [2022-12-13 17:37:11,446 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47988505747126436 [2022-12-13 17:37:11,446 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 167 transitions. [2022-12-13 17:37:11,446 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 167 transitions. [2022-12-13 17:37:11,446 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:11,446 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 167 transitions. [2022-12-13 17:37:11,447 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 55.666666666666664) internal successors, (167), 3 states have internal predecessors, (167), 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 17:37:11,448 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 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 17:37:11,448 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 116.0) internal successors, (464), 4 states have internal predecessors, (464), 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 17:37:11,448 INFO L175 Difference]: Start difference. First operand has 37 places, 32 transitions, 125 flow. Second operand 3 states and 167 transitions. [2022-12-13 17:37:11,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 26 transitions, 133 flow [2022-12-13 17:37:11,450 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 26 transitions, 105 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:37:11,451 INFO L231 Difference]: Finished difference. Result has 32 places, 23 transitions, 73 flow [2022-12-13 17:37:11,451 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=116, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=73, PETRI_PLACES=32, PETRI_TRANSITIONS=23} [2022-12-13 17:37:11,452 INFO L288 CegarLoopForPetriNet]: 37 programPoint places, -5 predicate places. [2022-12-13 17:37:11,452 INFO L495 AbstractCegarLoop]: Abstraction has has 32 places, 23 transitions, 73 flow [2022-12-13 17:37:11,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 52.333333333333336) internal successors, (157), 3 states have internal predecessors, (157), 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 17:37:11,452 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:11,452 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 17:37:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 17:37:11,452 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-12-13 17:37:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:11,453 INFO L85 PathProgramCache]: Analyzing trace with hash 363828937, now seen corresponding path program 1 times [2022-12-13 17:37:11,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:11,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095325637] [2022-12-13 17:37:11,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:11,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:11,465 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:37:11,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:11,476 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:37:11,477 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:37:11,477 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-12-13 17:37:11,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-12-13 17:37:11,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-12-13 17:37:11,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-12-13 17:37:11,477 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-12-13 17:37:11,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-12-13 17:37:11,478 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:37:11,478 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:37:11,478 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 17:37:11,491 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:11,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,504 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-13 17:37:11,505 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:37:11,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 246 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-12-13 17:37:11,505 INFO L82 GeneralOperation]: Start removeDead. Operand has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,506 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:11,506 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,507 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 85 places, 81 transitions, 194 flow [2022-12-13 17:37:11,522 INFO L130 PetriNetUnfolder]: 9/131 cut-off events. [2022-12-13 17:37:11,522 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-12-13 17:37:11,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 154 conditions, 131 events. 9/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 246 event pairs, 0 based on Foata normal form. 0/113 useless extension candidates. Maximal degree in co-relation 113. Up to 10 conditions per place. [2022-12-13 17:37:11,525 INFO L119 LiptonReduction]: Number of co-enabled transitions 3216 [2022-12-13 17:37:12,282 INFO L134 LiptonReduction]: Checked pairs total: 13767 [2022-12-13 17:37:12,283 INFO L136 LiptonReduction]: Total number of compositions: 55 [2022-12-13 17:37:12,284 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:12,285 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:12,285 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-12-13 17:37:12,287 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-12-13 17:37:12,287 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:37:12,287 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:12,287 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:12,287 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:37:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:12,288 INFO L85 PathProgramCache]: Analyzing trace with hash -602460292, now seen corresponding path program 1 times [2022-12-13 17:37:12,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:12,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814707283] [2022-12-13 17:37:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:12,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:12,315 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 17:37:12,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:12,316 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814707283] [2022-12-13 17:37:12,316 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814707283] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:12,316 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:12,316 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:37:12,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311146242] [2022-12-13 17:37:12,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:12,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:12,332 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 136 [2022-12-13 17:37:12,333 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 116 flow. Second operand has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 17:37:12,333 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:12,333 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 136 [2022-12-13 17:37:12,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:13,639 INFO L130 PetriNetUnfolder]: 10745/16935 cut-off events. [2022-12-13 17:37:13,640 INFO L131 PetriNetUnfolder]: For 4025/4025 co-relation queries the response was YES. [2022-12-13 17:37:13,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34577 conditions, 16935 events. 10745/16935 cut-off events. For 4025/4025 co-relation queries the response was YES. Maximal size of possible extension queue 1130. Compared 130908 event pairs, 5857 based on Foata normal form. 2766/19188 useless extension candidates. Maximal degree in co-relation 3785. Up to 9097 conditions per place. [2022-12-13 17:37:13,736 INFO L137 encePairwiseOnDemand]: 117/136 looper letters, 38 selfloop transitions, 9 changer transitions 0/54 dead transitions. [2022-12-13 17:37:13,736 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 54 transitions, 255 flow [2022-12-13 17:37:13,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:13,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:13,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 200 transitions. [2022-12-13 17:37:13,737 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49019607843137253 [2022-12-13 17:37:13,737 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 200 transitions. [2022-12-13 17:37:13,738 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 200 transitions. [2022-12-13 17:37:13,738 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:13,738 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 200 transitions. [2022-12-13 17:37:13,739 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 66.66666666666667) internal successors, (200), 3 states have internal predecessors, (200), 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 17:37:13,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 17:37:13,741 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 17:37:13,741 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 116 flow. Second operand 3 states and 200 transitions. [2022-12-13 17:37:13,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 54 transitions, 255 flow [2022-12-13 17:37:13,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 54 transitions, 237 flow, removed 9 selfloop flow, removed 0 redundant places. [2022-12-13 17:37:13,746 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 166 flow [2022-12-13 17:37:13,746 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2022-12-13 17:37:13,746 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, 0 predicate places. [2022-12-13 17:37:13,747 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 166 flow [2022-12-13 17:37:13,747 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.333333333333336) internal successors, (145), 3 states have internal predecessors, (145), 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 17:37:13,747 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:13,747 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:13,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 17:37:13,747 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:37:13,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:13,748 INFO L85 PathProgramCache]: Analyzing trace with hash 566218425, now seen corresponding path program 1 times [2022-12-13 17:37:13,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:13,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498106404] [2022-12-13 17:37:13,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:13,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:13,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:37:13,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:13,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498106404] [2022-12-13 17:37:13,813 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498106404] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:13,813 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:13,813 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:37:13,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906619745] [2022-12-13 17:37:13,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:13,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:13,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:13,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:13,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:13,815 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 136 [2022-12-13 17:37:13,816 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 166 flow. Second operand has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 17:37:13,816 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:13,816 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 136 [2022-12-13 17:37:13,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:13,908 INFO L130 PetriNetUnfolder]: 149/641 cut-off events. [2022-12-13 17:37:13,908 INFO L131 PetriNetUnfolder]: For 177/177 co-relation queries the response was YES. [2022-12-13 17:37:13,910 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1455 conditions, 641 events. 149/641 cut-off events. For 177/177 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 4211 event pairs, 83 based on Foata normal form. 124/748 useless extension candidates. Maximal degree in co-relation 879. Up to 164 conditions per place. [2022-12-13 17:37:13,912 INFO L137 encePairwiseOnDemand]: 128/136 looper letters, 10 selfloop transitions, 8 changer transitions 0/33 dead transitions. [2022-12-13 17:37:13,912 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 33 transitions, 173 flow [2022-12-13 17:37:13,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:13,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:13,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 196 transitions. [2022-12-13 17:37:13,913 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.4803921568627451 [2022-12-13 17:37:13,913 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 196 transitions. [2022-12-13 17:37:13,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 196 transitions. [2022-12-13 17:37:13,914 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:13,914 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 196 transitions. [2022-12-13 17:37:13,914 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 65.33333333333333) internal successors, (196), 3 states have internal predecessors, (196), 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 17:37:13,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 17:37:13,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 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 17:37:13,916 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 166 flow. Second operand 3 states and 196 transitions. [2022-12-13 17:37:13,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 33 transitions, 173 flow [2022-12-13 17:37:13,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 33 transitions, 137 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:37:13,919 INFO L231 Difference]: Finished difference. Result has 40 places, 29 transitions, 94 flow [2022-12-13 17:37:13,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=94, PETRI_PLACES=40, PETRI_TRANSITIONS=29} [2022-12-13 17:37:13,919 INFO L288 CegarLoopForPetriNet]: 47 programPoint places, -7 predicate places. [2022-12-13 17:37:13,920 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 29 transitions, 94 flow [2022-12-13 17:37:13,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 60.333333333333336) internal successors, (181), 3 states have internal predecessors, (181), 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 17:37:13,920 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:13,920 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:13,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 17:37:13,920 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-12-13 17:37:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:13,921 INFO L85 PathProgramCache]: Analyzing trace with hash 913233179, now seen corresponding path program 1 times [2022-12-13 17:37:13,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:13,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209758098] [2022-12-13 17:37:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:13,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:13,932 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:37:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:13,943 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:37:13,943 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:37:13,943 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-12-13 17:37:13,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-12-13 17:37:13,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-12-13 17:37:13,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-12-13 17:37:13,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-12-13 17:37:13,944 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-12-13 17:37:13,944 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-12-13 17:37:13,944 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:37:13,944 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:37:13,945 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 17:37:13,959 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:13,961 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,969 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-12-13 17:37:13,969 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 17:37:13,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 306 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-12-13 17:37:13,970 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,970 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,970 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:13,970 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,970 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 99 places, 94 transitions, 233 flow [2022-12-13 17:37:13,978 INFO L130 PetriNetUnfolder]: 11/157 cut-off events. [2022-12-13 17:37:13,978 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-12-13 17:37:13,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 188 conditions, 157 events. 11/157 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 306 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 144. Up to 12 conditions per place. [2022-12-13 17:37:13,981 INFO L119 LiptonReduction]: Number of co-enabled transitions 4800 [2022-12-13 17:37:14,835 INFO L134 LiptonReduction]: Checked pairs total: 21580 [2022-12-13 17:37:14,835 INFO L136 LiptonReduction]: Total number of compositions: 64 [2022-12-13 17:37:14,837 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:14,837 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:14,837 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-12-13 17:37:14,838 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-12-13 17:37:14,839 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:37:14,839 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:14,839 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:14,839 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:37:14,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:14,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1733928237, now seen corresponding path program 1 times [2022-12-13 17:37:14,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:14,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705832977] [2022-12-13 17:37:14,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:14,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:14,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:14,856 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 17:37:14,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:14,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705832977] [2022-12-13 17:37:14,857 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705832977] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:14,857 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:14,857 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:37:14,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187811864] [2022-12-13 17:37:14,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:14,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:14,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:14,876 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 158 [2022-12-13 17:37:14,877 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 51 transitions, 147 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 17:37:14,877 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:14,877 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 158 [2022-12-13 17:37:14,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:21,994 INFO L130 PetriNetUnfolder]: 84206/120198 cut-off events. [2022-12-13 17:37:21,994 INFO L131 PetriNetUnfolder]: For 38290/38290 co-relation queries the response was YES. [2022-12-13 17:37:22,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 248373 conditions, 120198 events. 84206/120198 cut-off events. For 38290/38290 co-relation queries the response was YES. Maximal size of possible extension queue 6117. Compared 970062 event pairs, 44681 based on Foata normal form. 14930/133185 useless extension candidates. Maximal degree in co-relation 31252. Up to 62881 conditions per place. [2022-12-13 17:37:22,726 INFO L137 encePairwiseOnDemand]: 136/158 looper letters, 46 selfloop transitions, 11 changer transitions 0/65 dead transitions. [2022-12-13 17:37:22,726 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 65 transitions, 321 flow [2022-12-13 17:37:22,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:22,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:22,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 227 transitions. [2022-12-13 17:37:22,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47890295358649787 [2022-12-13 17:37:22,727 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 227 transitions. [2022-12-13 17:37:22,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 227 transitions. [2022-12-13 17:37:22,728 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:22,728 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 227 transitions. [2022-12-13 17:37:22,728 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.66666666666667) internal successors, (227), 3 states have internal predecessors, (227), 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 17:37:22,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 17:37:22,729 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 17:37:22,729 INFO L175 Difference]: Start difference. First operand has 57 places, 51 transitions, 147 flow. Second operand 3 states and 227 transitions. [2022-12-13 17:37:22,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 65 transitions, 321 flow [2022-12-13 17:37:22,780 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 65 transitions, 289 flow, removed 16 selfloop flow, removed 0 redundant places. [2022-12-13 17:37:22,781 INFO L231 Difference]: Finished difference. Result has 55 places, 50 transitions, 199 flow [2022-12-13 17:37:22,781 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=199, PETRI_PLACES=55, PETRI_TRANSITIONS=50} [2022-12-13 17:37:22,781 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 17:37:22,781 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 50 transitions, 199 flow [2022-12-13 17:37:22,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 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 17:37:22,781 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:22,781 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:22,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 17:37:22,782 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:37:22,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:22,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1594946970, now seen corresponding path program 1 times [2022-12-13 17:37:22,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:22,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215123787] [2022-12-13 17:37:22,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:22,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:22,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:22,814 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:37:22,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:22,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215123787] [2022-12-13 17:37:22,814 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215123787] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:22,814 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:22,814 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:37:22,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505418765] [2022-12-13 17:37:22,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:22,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:22,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:22,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:22,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:22,816 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 66 out of 158 [2022-12-13 17:37:22,817 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 50 transitions, 199 flow. Second operand has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 17:37:22,817 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:22,817 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 66 of 158 [2022-12-13 17:37:22,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:37:22,937 INFO L130 PetriNetUnfolder]: 405/1641 cut-off events. [2022-12-13 17:37:22,937 INFO L131 PetriNetUnfolder]: For 465/465 co-relation queries the response was YES. [2022-12-13 17:37:22,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3728 conditions, 1641 events. 405/1641 cut-off events. For 465/465 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 13513 event pairs, 227 based on Foata normal form. 444/2036 useless extension candidates. Maximal degree in co-relation 2227. Up to 436 conditions per place. [2022-12-13 17:37:22,942 INFO L137 encePairwiseOnDemand]: 148/158 looper letters, 12 selfloop transitions, 10 changer transitions 0/40 dead transitions. [2022-12-13 17:37:22,942 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 40 transitions, 213 flow [2022-12-13 17:37:22,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:37:22,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:37:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 225 transitions. [2022-12-13 17:37:22,943 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.47468354430379744 [2022-12-13 17:37:22,943 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 225 transitions. [2022-12-13 17:37:22,944 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 225 transitions. [2022-12-13 17:37:22,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:37:22,944 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 225 transitions. [2022-12-13 17:37:22,944 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 75.0) internal successors, (225), 3 states have internal predecessors, (225), 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 17:37:22,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 17:37:22,945 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 158.0) internal successors, (632), 4 states have internal predecessors, (632), 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 17:37:22,945 INFO L175 Difference]: Start difference. First operand has 55 places, 50 transitions, 199 flow. Second operand 3 states and 225 transitions. [2022-12-13 17:37:22,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 40 transitions, 213 flow [2022-12-13 17:37:22,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 40 transitions, 169 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:37:22,948 INFO L231 Difference]: Finished difference. Result has 48 places, 35 transitions, 115 flow [2022-12-13 17:37:22,949 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=158, PETRI_DIFFERENCE_MINUEND_FLOW=95, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=48, PETRI_TRANSITIONS=35} [2022-12-13 17:37:22,949 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -9 predicate places. [2022-12-13 17:37:22,949 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 35 transitions, 115 flow [2022-12-13 17:37:22,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 68.33333333333333) internal successors, (205), 3 states have internal predecessors, (205), 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 17:37:22,949 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:22,949 INFO L209 CegarLoopForPetriNet]: trace histogram [6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:22,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-12-13 17:37:22,949 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-12-13 17:37:22,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:22,950 INFO L85 PathProgramCache]: Analyzing trace with hash 291525118, now seen corresponding path program 1 times [2022-12-13 17:37:22,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:22,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625912124] [2022-12-13 17:37:22,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:22,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:22,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:22,958 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:37:22,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:37:22,966 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:37:22,966 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 7 remaining) [2022-12-13 17:37:22,967 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 7 remaining) [2022-12-13 17:37:22,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-12-13 17:37:22,967 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:37:22,968 WARN L233 ceAbstractionStarter]: 5 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:37:22,968 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 6 thread instances. [2022-12-13 17:37:22,983 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:37:22,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,000 INFO L130 PetriNetUnfolder]: 13/183 cut-off events. [2022-12-13 17:37:23,000 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 17:37:23,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 366 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-12-13 17:37:23,001 INFO L82 GeneralOperation]: Start removeDead. Operand has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,001 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,002 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:37:23,002 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,002 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 113 places, 107 transitions, 274 flow [2022-12-13 17:37:23,014 INFO L130 PetriNetUnfolder]: 13/183 cut-off events. [2022-12-13 17:37:23,014 INFO L131 PetriNetUnfolder]: For 50/50 co-relation queries the response was YES. [2022-12-13 17:37:23,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223 conditions, 183 events. 13/183 cut-off events. For 50/50 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 366 event pairs, 0 based on Foata normal form. 0/157 useless extension candidates. Maximal degree in co-relation 176. Up to 14 conditions per place. [2022-12-13 17:37:23,018 INFO L119 LiptonReduction]: Number of co-enabled transitions 6696 [2022-12-13 17:37:23,932 INFO L134 LiptonReduction]: Checked pairs total: 29326 [2022-12-13 17:37:23,932 INFO L136 LiptonReduction]: Total number of compositions: 69 [2022-12-13 17:37:23,933 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:37:23,933 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:37:23,933 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2022-12-13 17:37:23,934 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-12-13 17:37:23,934 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:37:23,934 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:37:23,934 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:37:23,934 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 17:37:23,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:37:23,934 INFO L85 PathProgramCache]: Analyzing trace with hash -1379907031, now seen corresponding path program 1 times [2022-12-13 17:37:23,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:37:23,935 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139002488] [2022-12-13 17:37:23,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:37:23,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:37:23,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:37:23,949 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 17:37:23,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:37:23,949 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139002488] [2022-12-13 17:37:23,949 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139002488] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:37:23,949 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:37:23,949 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:37:23,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485995521] [2022-12-13 17:37:23,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:37:23,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:37:23,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:37:23,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:37:23,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:37:23,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 176 [2022-12-13 17:37:23,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 58 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 17:37:23,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:37:23,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 176 [2022-12-13 17:37:23,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:48,281 INFO L130 PetriNetUnfolder]: 1011583/1331415 cut-off events. [2022-12-13 17:38:48,281 INFO L131 PetriNetUnfolder]: For 476467/476467 co-relation queries the response was YES. [2022-12-13 17:38:51,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2780438 conditions, 1331415 events. 1011583/1331415 cut-off events. For 476467/476467 co-relation queries the response was YES. Maximal size of possible extension queue 54254. Compared 11070876 event pairs, 548769 based on Foata normal form. 205096/1483361 useless extension candidates. Maximal degree in co-relation 365128. Up to 691385 conditions per place. [2022-12-13 17:38:56,350 INFO L137 encePairwiseOnDemand]: 149/176 looper letters, 59 selfloop transitions, 13 changer transitions 0/80 dead transitions. [2022-12-13 17:38:56,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 80 transitions, 409 flow [2022-12-13 17:38:56,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:56,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:56,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 260 transitions. [2022-12-13 17:38:56,352 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2022-12-13 17:38:56,352 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 260 transitions. [2022-12-13 17:38:56,352 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 260 transitions. [2022-12-13 17:38:56,352 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:56,352 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 260 transitions. [2022-12-13 17:38:56,353 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 86.66666666666667) internal successors, (260), 3 states have internal predecessors, (260), 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 17:38:56,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 17:38:56,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 17:38:56,354 INFO L175 Difference]: Start difference. First operand has 66 places, 58 transitions, 176 flow. Second operand 3 states and 260 transitions. [2022-12-13 17:38:56,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 80 transitions, 409 flow [2022-12-13 17:38:57,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 80 transitions, 359 flow, removed 25 selfloop flow, removed 0 redundant places. [2022-12-13 17:38:57,351 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 244 flow [2022-12-13 17:38:57,352 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=244, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2022-12-13 17:38:57,352 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2022-12-13 17:38:57,352 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 244 flow [2022-12-13 17:38:57,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 58.333333333333336) internal successors, (175), 3 states have internal predecessors, (175), 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 17:38:57,352 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:57,353 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:57,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-12-13 17:38:57,353 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 17:38:57,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:57,353 INFO L85 PathProgramCache]: Analyzing trace with hash 96764342, now seen corresponding path program 1 times [2022-12-13 17:38:57,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:57,353 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663237622] [2022-12-13 17:38:57,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:57,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:57,401 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-12-13 17:38:57,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:57,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663237622] [2022-12-13 17:38:57,402 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663237622] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:57,402 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:57,402 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-12-13 17:38:57,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5141878] [2022-12-13 17:38:57,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:57,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:57,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:57,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:57,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:38:57,404 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 74 out of 176 [2022-12-13 17:38:57,404 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 244 flow. Second operand has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 17:38:57,404 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:57,405 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 74 of 176 [2022-12-13 17:38:57,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 17:38:57,687 INFO L130 PetriNetUnfolder]: 1061/4041 cut-off events. [2022-12-13 17:38:57,687 INFO L131 PetriNetUnfolder]: For 1153/1153 co-relation queries the response was YES. [2022-12-13 17:38:57,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9249 conditions, 4041 events. 1061/4041 cut-off events. For 1153/1153 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 39561 event pairs, 579 based on Foata normal form. 1564/5476 useless extension candidates. Maximal degree in co-relation 5411. Up to 1188 conditions per place. [2022-12-13 17:38:57,698 INFO L137 encePairwiseOnDemand]: 164/176 looper letters, 15 selfloop transitions, 12 changer transitions 0/47 dead transitions. [2022-12-13 17:38:57,698 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 47 transitions, 255 flow [2022-12-13 17:38:57,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 17:38:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 17:38:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 255 transitions. [2022-12-13 17:38:57,699 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.48295454545454547 [2022-12-13 17:38:57,700 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 255 transitions. [2022-12-13 17:38:57,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 255 transitions. [2022-12-13 17:38:57,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 17:38:57,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 255 transitions. [2022-12-13 17:38:57,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 85.0) internal successors, (255), 3 states have internal predecessors, (255), 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 17:38:57,701 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 17:38:57,701 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 176.0) internal successors, (704), 4 states have internal predecessors, (704), 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 17:38:57,701 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 244 flow. Second operand 3 states and 255 transitions. [2022-12-13 17:38:57,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 47 transitions, 255 flow [2022-12-13 17:38:57,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 47 transitions, 203 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-12-13 17:38:57,709 INFO L231 Difference]: Finished difference. Result has 56 places, 41 transitions, 136 flow [2022-12-13 17:38:57,710 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=176, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=56, PETRI_TRANSITIONS=41} [2022-12-13 17:38:57,710 INFO L288 CegarLoopForPetriNet]: 66 programPoint places, -10 predicate places. [2022-12-13 17:38:57,710 INFO L495 AbstractCegarLoop]: Abstraction has has 56 places, 41 transitions, 136 flow [2022-12-13 17:38:57,710 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 76.33333333333333) internal successors, (229), 3 states have internal predecessors, (229), 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 17:38:57,710 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:57,710 INFO L209 CegarLoopForPetriNet]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:57,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-12-13 17:38:57,710 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 5 more)] === [2022-12-13 17:38:57,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:57,711 INFO L85 PathProgramCache]: Analyzing trace with hash 1523181705, now seen corresponding path program 1 times [2022-12-13 17:38:57,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:57,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655673900] [2022-12-13 17:38:57,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:57,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:57,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:38:57,719 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 17:38:57,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 17:38:57,727 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 17:38:57,728 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (6 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (5 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 8 remaining) [2022-12-13 17:38:57,728 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 8 remaining) [2022-12-13 17:38:57,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-12-13 17:38:57,729 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 17:38:57,729 WARN L233 ceAbstractionStarter]: 6 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 17:38:57,729 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 7 thread instances. [2022-12-13 17:38:57,745 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-12-13 17:38:57,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,765 INFO L130 PetriNetUnfolder]: 15/209 cut-off events. [2022-12-13 17:38:57,765 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 17:38:57,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 209 events. 15/209 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 450 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 210. Up to 16 conditions per place. [2022-12-13 17:38:57,766 INFO L82 GeneralOperation]: Start removeDead. Operand has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,767 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,767 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 17:38:57,767 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,768 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 127 places, 120 transitions, 317 flow [2022-12-13 17:38:57,780 INFO L130 PetriNetUnfolder]: 15/209 cut-off events. [2022-12-13 17:38:57,780 INFO L131 PetriNetUnfolder]: For 77/77 co-relation queries the response was YES. [2022-12-13 17:38:57,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 259 conditions, 209 events. 15/209 cut-off events. For 77/77 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 450 event pairs, 0 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 210. Up to 16 conditions per place. [2022-12-13 17:38:57,784 INFO L119 LiptonReduction]: Number of co-enabled transitions 8904 [2022-12-13 17:38:58,696 INFO L134 LiptonReduction]: Checked pairs total: 40348 [2022-12-13 17:38:58,696 INFO L136 LiptonReduction]: Total number of compositions: 79 [2022-12-13 17:38:58,697 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 17:38:58,697 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;@18c9c528, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 17:38:58,697 INFO L358 AbstractCegarLoop]: Starting to check reachability of 9 error locations. [2022-12-13 17:38:58,698 INFO L130 PetriNetUnfolder]: 1/15 cut-off events. [2022-12-13 17:38:58,698 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 17:38:58,698 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 17:38:58,698 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2022-12-13 17:38:58,698 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 6 more)] === [2022-12-13 17:38:58,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 17:38:58,698 INFO L85 PathProgramCache]: Analyzing trace with hash -270005433, now seen corresponding path program 1 times [2022-12-13 17:38:58,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 17:38:58,699 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028650334] [2022-12-13 17:38:58,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 17:38:58,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 17:38:58,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 17:38:58,711 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 17:38:58,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 17:38:58,712 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028650334] [2022-12-13 17:38:58,712 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028650334] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 17:38:58,712 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 17:38:58,712 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 17:38:58,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399647790] [2022-12-13 17:38:58,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 17:38:58,712 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 17:38:58,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 17:38:58,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 17:38:58,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 17:38:58,740 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 199 [2022-12-13 17:38:58,740 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 67 transitions, 211 flow. Second operand has 3 states, 3 states have (on average 63.333333333333336) internal successors, (190), 3 states have internal predecessors, (190), 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 17:38:58,740 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 17:38:58,741 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 199 [2022-12-13 17:38:58,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand