./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.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_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/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_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/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_e772bbd7-88bc-49aa-92d5-9c0806474a02/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 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 --- 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 21:03:49,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-12-13 21:03:49,172 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-12-13 21:03:49,190 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-12-13 21:03:49,190 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-12-13 21:03:49,191 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-12-13 21:03:49,193 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-12-13 21:03:49,194 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-12-13 21:03:49,196 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-12-13 21:03:49,196 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-12-13 21:03:49,197 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-12-13 21:03:49,198 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-12-13 21:03:49,199 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-12-13 21:03:49,199 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-12-13 21:03:49,200 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-12-13 21:03:49,201 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-12-13 21:03:49,202 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-12-13 21:03:49,203 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-12-13 21:03:49,204 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-12-13 21:03:49,206 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-12-13 21:03:49,207 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-12-13 21:03:49,208 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-12-13 21:03:49,209 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-12-13 21:03:49,210 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-12-13 21:03:49,219 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-12-13 21:03:49,219 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-12-13 21:03:49,220 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-12-13 21:03:49,221 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-12-13 21:03:49,221 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-12-13 21:03:49,222 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-12-13 21:03:49,222 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-12-13 21:03:49,223 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-12-13 21:03:49,224 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-12-13 21:03:49,225 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-12-13 21:03:49,226 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-12-13 21:03:49,226 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-12-13 21:03:49,226 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-12-13 21:03:49,227 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-12-13 21:03:49,227 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-12-13 21:03:49,228 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-12-13 21:03:49,228 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-12-13 21:03:49,229 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-12-13 21:03:49,250 INFO L113 SettingsManager]: Loading preferences was successful [2022-12-13 21:03:49,250 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-12-13 21:03:49,251 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-12-13 21:03:49,258 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-12-13 21:03:49,258 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-12-13 21:03:49,259 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-12-13 21:03:49,259 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * Use SBE=true [2022-12-13 21:03:49,260 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * sizeof long=4 [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-12-13 21:03:49,260 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * sizeof long double=12 [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-12-13 21:03:49,261 INFO L138 SettingsManager]: * Use constant arrays=true [2022-12-13 21:03:49,262 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-12-13 21:03:49,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-12-13 21:03:49,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-12-13 21:03:49,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-12-13 21:03:49,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:03:49,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-12-13 21:03:49,263 INFO L138 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2022-12-13 21:03:49,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2022-12-13 21:03:49,264 INFO L138 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2022-12-13 21:03:49,264 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_e772bbd7-88bc-49aa-92d5-9c0806474a02/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 78ae3f0dde82ce244d0cacebded5945a3f759d1f5aeba1d4553a1f59ef165385 [2022-12-13 21:03:49,435 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-12-13 21:03:49,451 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-12-13 21:03:49,453 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-12-13 21:03:49,454 INFO L271 PluginConnector]: Initializing CDTParser... [2022-12-13 21:03:49,454 INFO L275 PluginConnector]: CDTParser initialized [2022-12-13 21:03:49,455 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/../../sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-12-13 21:03:52,091 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-12-13 21:03:52,324 INFO L351 CDTParser]: Found 1 translation units. [2022-12-13 21:03:52,324 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i [2022-12-13 21:03:52,336 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/data/3757ae8d7/48c286acca9b447480a4570dcd4c8b54/FLAGf3d7c3ae2 [2022-12-13 21:03:52,349 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/data/3757ae8d7/48c286acca9b447480a4570dcd4c8b54 [2022-12-13 21:03:52,351 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-12-13 21:03:52,353 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-12-13 21:03:52,354 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-12-13 21:03:52,354 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-12-13 21:03:52,358 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-12-13 21:03:52,358 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,359 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7c9d77c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52, skipping insertion in model container [2022-12-13 21:03:52,360 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,367 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-12-13 21:03:52,399 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-12-13 21:03:52,658 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_e772bbd7-88bc-49aa-92d5-9c0806474a02/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-12-13 21:03:52,678 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:03:52,690 INFO L203 MainTranslator]: Completed pre-run [2022-12-13 21:03:52,718 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_e772bbd7-88bc-49aa-92d5-9c0806474a02/sv-benchmarks/c/goblint-regression/28-race_reach_37-indirect_racing.i[30176,30189] [2022-12-13 21:03:52,725 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-12-13 21:03:52,756 INFO L208 MainTranslator]: Completed translation [2022-12-13 21:03:52,757 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52 WrapperNode [2022-12-13 21:03:52,757 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-12-13 21:03:52,758 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-12-13 21:03:52,758 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-12-13 21:03:52,758 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-12-13 21:03:52,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,776 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,796 INFO L138 Inliner]: procedures = 170, calls = 36, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 77 [2022-12-13 21:03:52,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-12-13 21:03:52,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-12-13 21:03:52,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-12-13 21:03:52,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-12-13 21:03:52,806 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,806 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,808 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,809 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,813 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,817 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,818 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,819 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,821 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-12-13 21:03:52,822 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-12-13 21:03:52,822 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-12-13 21:03:52,822 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-12-13 21:03:52,823 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (1/1) ... [2022-12-13 21:03:52,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-12-13 21:03:52,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:03:52,850 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-12-13 21:03:52,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-12-13 21:03:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-12-13 21:03:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-12-13 21:03:52,882 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2022-12-13 21:03:52,883 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-12-13 21:03:52,883 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-12-13 21:03:52,883 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-12-13 21:03:52,884 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 21:03:52,989 INFO L235 CfgBuilder]: Building ICFG [2022-12-13 21:03:52,991 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-12-13 21:03:53,166 INFO L276 CfgBuilder]: Performing block encoding [2022-12-13 21:03:53,173 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-12-13 21:03:53,173 INFO L300 CfgBuilder]: Removed 10 assume(true) statements. [2022-12-13 21:03:53,175 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:03:53 BoogieIcfgContainer [2022-12-13 21:03:53,176 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-12-13 21:03:53,179 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-12-13 21:03:53,179 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-12-13 21:03:53,181 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-12-13 21:03:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.12 09:03:52" (1/3) ... [2022-12-13 21:03:53,182 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77630302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:03:53, skipping insertion in model container [2022-12-13 21:03:53,182 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.12 09:03:52" (2/3) ... [2022-12-13 21:03:53,183 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@77630302 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.12 09:03:53, skipping insertion in model container [2022-12-13 21:03:53,183 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.12 09:03:53" (3/3) ... [2022-12-13 21:03:53,184 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_37-indirect_racing.i [2022-12-13 21:03:53,192 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-12-13 21:03:53,209 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-12-13 21:03:53,209 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-12-13 21:03:53,210 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-12-13 21:03:53,260 INFO L144 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2022-12-13 21:03:53,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 105 places, 114 transitions, 236 flow [2022-12-13 21:03:53,349 INFO L130 PetriNetUnfolder]: 17/149 cut-off events. [2022-12-13 21:03:53,349 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-12-13 21:03:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 149 events. 17/149 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 356 event pairs, 0 based on Foata normal form. 0/127 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2022-12-13 21:03:53,354 INFO L82 GeneralOperation]: Start removeDead. Operand has 105 places, 114 transitions, 236 flow [2022-12-13 21:03:53,358 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 101 places, 109 transitions, 223 flow [2022-12-13 21:03:53,361 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:03:53,371 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 101 places, 109 transitions, 223 flow [2022-12-13 21:03:53,374 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 101 places, 109 transitions, 223 flow [2022-12-13 21:03:53,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 101 places, 109 transitions, 223 flow [2022-12-13 21:03:53,411 INFO L130 PetriNetUnfolder]: 16/144 cut-off events. [2022-12-13 21:03:53,411 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:03:53,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149 conditions, 144 events. 16/144 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 336 event pairs, 0 based on Foata normal form. 0/122 useless extension candidates. Maximal degree in co-relation 72. Up to 6 conditions per place. [2022-12-13 21:03:53,415 INFO L119 LiptonReduction]: Number of co-enabled transitions 2624 [2022-12-13 21:03:55,640 INFO L134 LiptonReduction]: Checked pairs total: 4354 [2022-12-13 21:03:55,640 INFO L136 LiptonReduction]: Total number of compositions: 91 [2022-12-13 21:03:55,652 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:03:55,656 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;@2e650106, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:03:55,656 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 21:03:55,658 INFO L130 PetriNetUnfolder]: 0/8 cut-off events. [2022-12-13 21:03:55,659 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:03:55,659 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:03:55,659 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:03:55,659 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:03:55,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:03:55,663 INFO L85 PathProgramCache]: Analyzing trace with hash 13315826, now seen corresponding path program 1 times [2022-12-13 21:03:55,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:03:55,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887625403] [2022-12-13 21:03:55,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:55,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:03:55,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:03:55,844 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 21:03:55,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:03:55,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887625403] [2022-12-13 21:03:55,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887625403] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:03:55,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:03:55,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:03:55,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787220054] [2022-12-13 21:03:55,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:03:55,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:03:55,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:03:55,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:03:55,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:03:55,880 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 205 [2022-12-13 21:03:55,882 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 31 transitions, 67 flow. Second operand has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 21:03:55,882 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:03:55,882 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 205 [2022-12-13 21:03:55,883 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:03:55,951 INFO L130 PetriNetUnfolder]: 90/214 cut-off events. [2022-12-13 21:03:55,951 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:03:55,951 INFO L83 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 214 events. 90/214 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 892 event pairs, 0 based on Foata normal form. 10/191 useless extension candidates. Maximal degree in co-relation 399. Up to 190 conditions per place. [2022-12-13 21:03:55,952 INFO L137 encePairwiseOnDemand]: 194/205 looper letters, 26 selfloop transitions, 2 changer transitions 4/34 dead transitions. [2022-12-13 21:03:55,953 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 34 transitions, 137 flow [2022-12-13 21:03:55,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:03:55,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:03:55,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 335 transitions. [2022-12-13 21:03:55,965 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2022-12-13 21:03:55,966 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 335 transitions. [2022-12-13 21:03:55,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 335 transitions. [2022-12-13 21:03:55,968 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:03:55,970 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 335 transitions. [2022-12-13 21:03:55,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 111.66666666666667) internal successors, (335), 3 states have internal predecessors, (335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:03:55,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 21:03:55,976 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 205.0) internal successors, (820), 4 states have internal predecessors, (820), 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 21:03:55,978 INFO L175 Difference]: Start difference. First operand has 26 places, 31 transitions, 67 flow. Second operand 3 states and 335 transitions. [2022-12-13 21:03:55,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 34 transitions, 137 flow [2022-12-13 21:03:55,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 34 transitions, 137 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:03:55,981 INFO L231 Difference]: Finished difference. Result has 29 places, 19 transitions, 51 flow [2022-12-13 21:03:55,983 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=205, PETRI_DIFFERENCE_MINUEND_FLOW=51, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=51, PETRI_PLACES=29, PETRI_TRANSITIONS=19} [2022-12-13 21:03:55,987 INFO L288 CegarLoopForPetriNet]: 26 programPoint places, 3 predicate places. [2022-12-13 21:03:55,987 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 19 transitions, 51 flow [2022-12-13 21:03:55,987 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 97.33333333333333) internal successors, (292), 3 states have internal predecessors, (292), 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 21:03:55,987 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:03:55,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2022-12-13 21:03:55,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-12-13 21:03:55,988 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:03:55,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:03:55,989 INFO L85 PathProgramCache]: Analyzing trace with hash -73373167, now seen corresponding path program 1 times [2022-12-13 21:03:55,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:03:55,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677175381] [2022-12-13 21:03:55,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:55,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:03:56,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:03:56,021 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:03:56,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:03:56,055 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:03:56,055 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:03:56,057 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 21:03:56,058 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 21:03:56,059 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-12-13 21:03:56,059 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1] [2022-12-13 21:03:56,061 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:03:56,061 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-12-13 21:03:56,076 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-12-13 21:03:56,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,102 INFO L130 PetriNetUnfolder]: 31/243 cut-off events. [2022-12-13 21:03:56,103 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:03:56,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 31/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 728 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-12-13 21:03:56,104 INFO L82 GeneralOperation]: Start removeDead. Operand has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,106 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,106 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:03:56,106 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,106 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 134 places, 148 transitions, 314 flow [2022-12-13 21:03:56,126 INFO L130 PetriNetUnfolder]: 31/243 cut-off events. [2022-12-13 21:03:56,126 INFO L131 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2022-12-13 21:03:56,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 257 conditions, 243 events. 31/243 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 728 event pairs, 0 based on Foata normal form. 0/205 useless extension candidates. Maximal degree in co-relation 151. Up to 9 conditions per place. [2022-12-13 21:03:56,131 INFO L119 LiptonReduction]: Number of co-enabled transitions 8000 [2022-12-13 21:03:58,474 INFO L134 LiptonReduction]: Checked pairs total: 15637 [2022-12-13 21:03:58,474 INFO L136 LiptonReduction]: Total number of compositions: 112 [2022-12-13 21:03:58,475 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:03:58,476 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;@2e650106, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:03:58,476 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 21:03:58,478 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 21:03:58,478 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:03:58,478 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:03:58,478 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:03:58,478 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:03:58,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:03:58,478 INFO L85 PathProgramCache]: Analyzing trace with hash 22358265, now seen corresponding path program 1 times [2022-12-13 21:03:58,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:03:58,478 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068173270] [2022-12-13 21:03:58,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:58,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:03:58,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:03:58,510 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 21:03:58,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:03:58,510 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068173270] [2022-12-13 21:03:58,511 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068173270] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:03:58,511 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:03:58,511 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:03:58,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524512692] [2022-12-13 21:03:58,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:03:58,511 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:03:58,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:03:58,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:03:58,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:03:58,521 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 122 out of 260 [2022-12-13 21:03:58,522 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 21:03:58,522 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:03:58,522 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 122 of 260 [2022-12-13 21:03:58,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:03:58,752 INFO L130 PetriNetUnfolder]: 1490/2662 cut-off events. [2022-12-13 21:03:58,752 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 21:03:58,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5174 conditions, 2662 events. 1490/2662 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 15601 event pairs, 680 based on Foata normal form. 390/2736 useless extension candidates. Maximal degree in co-relation 532. Up to 2431 conditions per place. [2022-12-13 21:03:58,759 INFO L137 encePairwiseOnDemand]: 243/260 looper letters, 32 selfloop transitions, 2 changer transitions 8/50 dead transitions. [2022-12-13 21:03:58,760 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 50 transitions, 200 flow [2022-12-13 21:03:58,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:03:58,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:03:58,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 428 transitions. [2022-12-13 21:03:58,761 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5487179487179488 [2022-12-13 21:03:58,762 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 428 transitions. [2022-12-13 21:03:58,762 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 428 transitions. [2022-12-13 21:03:58,762 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:03:58,762 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 428 transitions. [2022-12-13 21:03:58,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 142.66666666666666) internal successors, (428), 3 states have internal predecessors, (428), 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 21:03:58,764 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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 21:03:58,765 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 260.0) internal successors, (1040), 4 states have internal predecessors, (1040), 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 21:03:58,765 INFO L175 Difference]: Start difference. First operand has 43 places, 54 transitions, 126 flow. Second operand 3 states and 428 transitions. [2022-12-13 21:03:58,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 50 transitions, 200 flow [2022-12-13 21:03:58,765 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 50 transitions, 200 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:03:58,766 INFO L231 Difference]: Finished difference. Result has 46 places, 33 transitions, 88 flow [2022-12-13 21:03:58,766 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=88, PETRI_PLACES=46, PETRI_TRANSITIONS=33} [2022-12-13 21:03:58,767 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2022-12-13 21:03:58,767 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 33 transitions, 88 flow [2022-12-13 21:03:58,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 123.33333333333333) internal successors, (370), 3 states have internal predecessors, (370), 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 21:03:58,767 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:03:58,768 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:03:58,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-12-13 21:03:58,768 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:03:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:03:58,768 INFO L85 PathProgramCache]: Analyzing trace with hash -946011540, now seen corresponding path program 1 times [2022-12-13 21:03:58,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:03:58,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317159477] [2022-12-13 21:03:58,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:58,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:03:58,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:03:58,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:03:58,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:03:58,812 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317159477] [2022-12-13 21:03:58,812 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317159477] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:03:58,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308692973] [2022-12-13 21:03:58,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:58,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:03:58,813 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:03:58,814 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:03:58,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-12-13 21:03:58,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:03:58,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:03:58,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:03:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:03:58,899 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:03:58,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:03:58,916 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308692973] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:03:58,917 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:03:58,917 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 21:03:58,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730803751] [2022-12-13 21:03:58,917 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:03:58,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:03:58,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:03:58,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:03:58,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:03:58,938 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 121 out of 260 [2022-12-13 21:03:58,939 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 33 transitions, 88 flow. Second operand has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 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 21:03:58,939 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:03:58,939 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 121 of 260 [2022-12-13 21:03:58,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:03:59,061 INFO L130 PetriNetUnfolder]: 376/769 cut-off events. [2022-12-13 21:03:59,061 INFO L131 PetriNetUnfolder]: For 180/180 co-relation queries the response was YES. [2022-12-13 21:03:59,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1714 conditions, 769 events. 376/769 cut-off events. For 180/180 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 3913 event pairs, 0 based on Foata normal form. 90/859 useless extension candidates. Maximal degree in co-relation 190. Up to 450 conditions per place. [2022-12-13 21:03:59,064 INFO L137 encePairwiseOnDemand]: 257/260 looper letters, 45 selfloop transitions, 3 changer transitions 0/56 dead transitions. [2022-12-13 21:03:59,065 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 56 transitions, 228 flow [2022-12-13 21:03:59,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-12-13 21:03:59,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-12-13 21:03:59,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 655 transitions. [2022-12-13 21:03:59,066 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5038461538461538 [2022-12-13 21:03:59,066 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 655 transitions. [2022-12-13 21:03:59,067 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 655 transitions. [2022-12-13 21:03:59,067 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:03:59,067 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 655 transitions. [2022-12-13 21:03:59,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 131.0) internal successors, (655), 5 states have internal predecessors, (655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:03:59,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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 21:03:59,071 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 260.0) internal successors, (1560), 6 states have internal predecessors, (1560), 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 21:03:59,071 INFO L175 Difference]: Start difference. First operand has 46 places, 33 transitions, 88 flow. Second operand 5 states and 655 transitions. [2022-12-13 21:03:59,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 56 transitions, 228 flow [2022-12-13 21:03:59,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 56 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2022-12-13 21:03:59,073 INFO L231 Difference]: Finished difference. Result has 40 places, 30 transitions, 82 flow [2022-12-13 21:03:59,073 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=260, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=82, PETRI_PLACES=40, PETRI_TRANSITIONS=30} [2022-12-13 21:03:59,073 INFO L288 CegarLoopForPetriNet]: 43 programPoint places, -3 predicate places. [2022-12-13 21:03:59,074 INFO L495 AbstractCegarLoop]: Abstraction has has 40 places, 30 transitions, 82 flow [2022-12-13 21:03:59,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 123.28571428571429) internal successors, (863), 7 states have internal predecessors, (863), 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 21:03:59,074 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:03:59,074 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 1, 1, 1, 1] [2022-12-13 21:03:59,080 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-12-13 21:03:59,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:03:59,276 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:03:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:03:59,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1253610472, now seen corresponding path program 1 times [2022-12-13 21:03:59,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:03:59,278 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604466831] [2022-12-13 21:03:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:03:59,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:03:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:03:59,352 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:03:59,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:03:59,394 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:03:59,394 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:03:59,394 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 21:03:59,395 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 21:03:59,395 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-12-13 21:03:59,395 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 21:03:59,396 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:03:59,397 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-12-13 21:03:59,421 INFO L144 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2022-12-13 21:03:59,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,453 INFO L130 PetriNetUnfolder]: 50/370 cut-off events. [2022-12-13 21:03:59,454 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 21:03:59,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 50/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1251 event pairs, 1 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 251. Up to 16 conditions per place. [2022-12-13 21:03:59,455 INFO L82 GeneralOperation]: Start removeDead. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,457 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,457 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:03:59,457 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,457 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 163 places, 182 transitions, 394 flow [2022-12-13 21:03:59,491 INFO L130 PetriNetUnfolder]: 50/370 cut-off events. [2022-12-13 21:03:59,491 INFO L131 PetriNetUnfolder]: For 19/19 co-relation queries the response was YES. [2022-12-13 21:03:59,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 398 conditions, 370 events. 50/370 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 1251 event pairs, 1 based on Foata normal form. 0/312 useless extension candidates. Maximal degree in co-relation 251. Up to 16 conditions per place. [2022-12-13 21:03:59,498 INFO L119 LiptonReduction]: Number of co-enabled transitions 15360 [2022-12-13 21:04:01,821 INFO L134 LiptonReduction]: Checked pairs total: 33302 [2022-12-13 21:04:01,821 INFO L136 LiptonReduction]: Total number of compositions: 132 [2022-12-13 21:04:01,822 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:04:01,823 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;@2e650106, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:04:01,823 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 21:04:01,824 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 21:04:01,824 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:04:01,824 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:01,824 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:04:01,825 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:01,825 INFO L85 PathProgramCache]: Analyzing trace with hash 33063776, now seen corresponding path program 1 times [2022-12-13 21:04:01,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:01,825 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033509218] [2022-12-13 21:04:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:01,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:01,844 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 21:04:01,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:01,845 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033509218] [2022-12-13 21:04:01,845 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033509218] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:04:01,845 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:04:01,845 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:04:01,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980741667] [2022-12-13 21:04:01,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:01,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:04:01,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:04:01,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:04:01,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 314 [2022-12-13 21:04:01,856 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 73 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 21:04:01,857 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:01,857 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 314 [2022-12-13 21:04:01,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:04,534 INFO L130 PetriNetUnfolder]: 29423/42563 cut-off events. [2022-12-13 21:04:04,534 INFO L131 PetriNetUnfolder]: For 1321/1321 co-relation queries the response was YES. [2022-12-13 21:04:04,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84837 conditions, 42563 events. 29423/42563 cut-off events. For 1321/1321 co-relation queries the response was YES. Maximal size of possible extension queue 983. Compared 275666 event pairs, 19125 based on Foata normal form. 4661/43510 useless extension candidates. Maximal degree in co-relation 7443. Up to 41391 conditions per place. [2022-12-13 21:04:04,661 INFO L137 encePairwiseOnDemand]: 291/314 looper letters, 44 selfloop transitions, 2 changer transitions 9/63 dead transitions. [2022-12-13 21:04:04,661 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 264 flow [2022-12-13 21:04:04,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:04:04,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:04:04,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 525 transitions. [2022-12-13 21:04:04,663 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5573248407643312 [2022-12-13 21:04:04,663 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 525 transitions. [2022-12-13 21:04:04,663 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 525 transitions. [2022-12-13 21:04:04,664 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:04,664 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 525 transitions. [2022-12-13 21:04:04,665 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 175.0) internal successors, (525), 3 states have internal predecessors, (525), 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 21:04:04,667 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 21:04:04,667 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 314.0) internal successors, (1256), 4 states have internal predecessors, (1256), 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 21:04:04,667 INFO L175 Difference]: Start difference. First operand has 57 places, 73 transitions, 176 flow. Second operand 3 states and 525 transitions. [2022-12-13 21:04:04,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 264 flow [2022-12-13 21:04:04,669 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 63 transitions, 264 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:04:04,670 INFO L231 Difference]: Finished difference. Result has 60 places, 45 transitions, 121 flow [2022-12-13 21:04:04,670 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=136, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=121, PETRI_PLACES=60, PETRI_TRANSITIONS=45} [2022-12-13 21:04:04,671 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, 3 predicate places. [2022-12-13 21:04:04,671 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 45 transitions, 121 flow [2022-12-13 21:04:04,671 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.33333333333334) internal successors, (448), 3 states have internal predecessors, (448), 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 21:04:04,671 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:04,671 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:04,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-12-13 21:04:04,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:04,672 INFO L85 PathProgramCache]: Analyzing trace with hash 140830527, now seen corresponding path program 1 times [2022-12-13 21:04:04,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:04,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685110753] [2022-12-13 21:04:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:04,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:04,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:04,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:04,707 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685110753] [2022-12-13 21:04:04,708 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685110753] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:04:04,708 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370829353] [2022-12-13 21:04:04,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:04,708 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:04,708 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:04,709 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:04,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-12-13 21:04:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:04,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:04:04,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:04,779 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:04,779 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:04:04,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:04,794 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370829353] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:04:04,795 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:04:04,795 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 21:04:04,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053939195] [2022-12-13 21:04:04,795 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:04:04,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:04:04,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:04,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:04:04,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:04:04,813 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 147 out of 314 [2022-12-13 21:04:04,814 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 45 transitions, 121 flow. Second operand has 7 states, 7 states have (on average 149.28571428571428) internal successors, (1045), 7 states have internal predecessors, (1045), 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 21:04:04,814 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:04,814 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 147 of 314 [2022-12-13 21:04:04,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:05,734 INFO L130 PetriNetUnfolder]: 7582/12187 cut-off events. [2022-12-13 21:04:05,734 INFO L131 PetriNetUnfolder]: For 4374/4374 co-relation queries the response was YES. [2022-12-13 21:04:05,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27575 conditions, 12187 events. 7582/12187 cut-off events. For 4374/4374 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 81355 event pairs, 0 based on Foata normal form. 1098/13285 useless extension candidates. Maximal degree in co-relation 3138. Up to 7322 conditions per place. [2022-12-13 21:04:05,772 INFO L137 encePairwiseOnDemand]: 311/314 looper letters, 87 selfloop transitions, 4 changer transitions 0/99 dead transitions. [2022-12-13 21:04:05,772 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 99 transitions, 411 flow [2022-12-13 21:04:05,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:04:05,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:04:05,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 976 transitions. [2022-12-13 21:04:05,774 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5180467091295117 [2022-12-13 21:04:05,774 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 976 transitions. [2022-12-13 21:04:05,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 976 transitions. [2022-12-13 21:04:05,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:05,775 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 976 transitions. [2022-12-13 21:04:05,776 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 162.66666666666666) internal successors, (976), 6 states have internal predecessors, (976), 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 21:04:05,778 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 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 21:04:05,778 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 314.0) internal successors, (2198), 7 states have internal predecessors, (2198), 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 21:04:05,778 INFO L175 Difference]: Start difference. First operand has 60 places, 45 transitions, 121 flow. Second operand 6 states and 976 transitions. [2022-12-13 21:04:05,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 99 transitions, 411 flow [2022-12-13 21:04:05,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 99 transitions, 403 flow, removed 3 selfloop flow, removed 1 redundant places. [2022-12-13 21:04:05,786 INFO L231 Difference]: Finished difference. Result has 55 places, 43 transitions, 117 flow [2022-12-13 21:04:05,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=314, PETRI_DIFFERENCE_MINUEND_FLOW=105, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=117, PETRI_PLACES=55, PETRI_TRANSITIONS=43} [2022-12-13 21:04:05,786 INFO L288 CegarLoopForPetriNet]: 57 programPoint places, -2 predicate places. [2022-12-13 21:04:05,786 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 43 transitions, 117 flow [2022-12-13 21:04:05,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 149.28571428571428) internal successors, (1045), 7 states have internal predecessors, (1045), 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 21:04:05,787 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:05,787 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1] [2022-12-13 21:04:05,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2022-12-13 21:04:05,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-12-13 21:04:05,988 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:05,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:05,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1511488331, now seen corresponding path program 1 times [2022-12-13 21:04:05,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:05,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485163038] [2022-12-13 21:04:05,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:05,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:06,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:04:06,026 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:04:06,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:04:06,042 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:04:06,042 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:04:06,042 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 21:04:06,042 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 21:04:06,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-12-13 21:04:06,042 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 21:04:06,043 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:04:06,043 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-12-13 21:04:06,063 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-12-13 21:04:06,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,111 INFO L130 PetriNetUnfolder]: 81/565 cut-off events. [2022-12-13 21:04:06,111 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 21:04:06,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 565 events. 81/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2151 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-12-13 21:04:06,114 INFO L82 GeneralOperation]: Start removeDead. Operand has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,117 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,117 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:04:06,117 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,117 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,117 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 192 places, 216 transitions, 476 flow [2022-12-13 21:04:06,163 INFO L130 PetriNetUnfolder]: 81/565 cut-off events. [2022-12-13 21:04:06,163 INFO L131 PetriNetUnfolder]: For 48/48 co-relation queries the response was YES. [2022-12-13 21:04:06,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 565 events. 81/565 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 2151 event pairs, 6 based on Foata normal form. 0/479 useless extension candidates. Maximal degree in co-relation 390. Up to 32 conditions per place. [2022-12-13 21:04:06,177 INFO L119 LiptonReduction]: Number of co-enabled transitions 24960 [2022-12-13 21:04:08,508 INFO L134 LiptonReduction]: Checked pairs total: 57176 [2022-12-13 21:04:08,508 INFO L136 LiptonReduction]: Total number of compositions: 151 [2022-12-13 21:04:08,509 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:04:08,509 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;@2e650106, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:04:08,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 21:04:08,511 INFO L130 PetriNetUnfolder]: 0/6 cut-off events. [2022-12-13 21:04:08,511 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:04:08,511 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:08,511 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:04:08,511 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:08,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:08,511 INFO L85 PathProgramCache]: Analyzing trace with hash 45403914, now seen corresponding path program 1 times [2022-12-13 21:04:08,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:08,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536070123] [2022-12-13 21:04:08,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:08,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:08,530 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 21:04:08,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:08,531 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536070123] [2022-12-13 21:04:08,531 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536070123] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:04:08,531 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:04:08,531 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:04:08,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035504069] [2022-12-13 21:04:08,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:04:08,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:04:08,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:08,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:04:08,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:04:08,541 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 174 out of 367 [2022-12-13 21:04:08,542 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 92 transitions, 228 flow. Second operand has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 21:04:08,542 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:08,542 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 174 of 367 [2022-12-13 21:04:08,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:41,374 INFO L130 PetriNetUnfolder]: 376438/513310 cut-off events. [2022-12-13 21:04:41,374 INFO L131 PetriNetUnfolder]: For 20457/20457 co-relation queries the response was YES. [2022-12-13 21:04:42,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1015044 conditions, 513310 events. 376438/513310 cut-off events. For 20457/20457 co-relation queries the response was YES. Maximal size of possible extension queue 9706. Compared 3859256 event pairs, 364045 based on Foata normal form. 78226/554413 useless extension candidates. Maximal degree in co-relation 87483. Up to 490459 conditions per place. [2022-12-13 21:04:43,106 INFO L137 encePairwiseOnDemand]: 338/367 looper letters, 54 selfloop transitions, 2 changer transitions 10/77 dead transitions. [2022-12-13 21:04:43,106 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 328 flow [2022-12-13 21:04:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-12-13 21:04:43,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-12-13 21:04:43,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 620 transitions. [2022-12-13 21:04:43,110 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5631244323342416 [2022-12-13 21:04:43,110 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 620 transitions. [2022-12-13 21:04:43,110 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 620 transitions. [2022-12-13 21:04:43,111 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:43,111 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 620 transitions. [2022-12-13 21:04:43,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 206.66666666666666) internal successors, (620), 3 states have internal predecessors, (620), 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 21:04:43,116 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 21:04:43,117 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 367.0) internal successors, (1468), 4 states have internal predecessors, (1468), 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 21:04:43,117 INFO L175 Difference]: Start difference. First operand has 71 places, 92 transitions, 228 flow. Second operand 3 states and 620 transitions. [2022-12-13 21:04:43,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 328 flow [2022-12-13 21:04:43,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 77 transitions, 328 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-12-13 21:04:43,124 INFO L231 Difference]: Finished difference. Result has 74 places, 57 transitions, 156 flow [2022-12-13 21:04:43,124 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=176, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=156, PETRI_PLACES=74, PETRI_TRANSITIONS=57} [2022-12-13 21:04:43,125 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 3 predicate places. [2022-12-13 21:04:43,125 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 57 transitions, 156 flow [2022-12-13 21:04:43,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 175.33333333333334) internal successors, (526), 3 states have internal predecessors, (526), 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 21:04:43,126 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:43,126 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:43,126 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-12-13 21:04:43,126 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:43,126 INFO L85 PathProgramCache]: Analyzing trace with hash -499924592, now seen corresponding path program 1 times [2022-12-13 21:04:43,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:43,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541019146] [2022-12-13 21:04:43,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:43,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:43,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:43,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:43,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:04:43,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541019146] [2022-12-13 21:04:43,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541019146] provided 0 perfect and 1 imperfect interpolant sequences [2022-12-13 21:04:43,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544184393] [2022-12-13 21:04:43,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:43,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-12-13 21:04:43,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 [2022-12-13 21:04:43,156 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-12-13 21:04:43,157 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-12-13 21:04:43,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:04:43,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 3 conjunts are in the unsatisfiable core [2022-12-13 21:04:43,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-12-13 21:04:43,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:43,230 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-12-13 21:04:43,241 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-12-13 21:04:43,242 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544184393] provided 0 perfect and 2 imperfect interpolant sequences [2022-12-13 21:04:43,242 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-12-13 21:04:43,242 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-12-13 21:04:43,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474516001] [2022-12-13 21:04:43,242 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-12-13 21:04:43,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-12-13 21:04:43,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:04:43,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-12-13 21:04:43,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-12-13 21:04:43,255 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 173 out of 367 [2022-12-13 21:04:43,257 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 57 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 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 21:04:43,257 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:04:43,257 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 173 of 367 [2022-12-13 21:04:43,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-12-13 21:04:57,337 INFO L130 PetriNetUnfolder]: 191482/256643 cut-off events. [2022-12-13 21:04:57,337 INFO L131 PetriNetUnfolder]: For 22262/22262 co-relation queries the response was YES. [2022-12-13 21:04:57,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 533248 conditions, 256643 events. 191482/256643 cut-off events. For 22262/22262 co-relation queries the response was YES. Maximal size of possible extension queue 5496. Compared 1792813 event pairs, 8016 based on Foata normal form. 1110/257753 useless extension candidates. Maximal degree in co-relation 478718. Up to 163477 conditions per place. [2022-12-13 21:04:58,579 INFO L137 encePairwiseOnDemand]: 363/367 looper letters, 136 selfloop transitions, 6 changer transitions 0/153 dead transitions. [2022-12-13 21:04:58,579 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 153 transitions, 636 flow [2022-12-13 21:04:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-12-13 21:04:58,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-12-13 21:04:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 1183 transitions. [2022-12-13 21:04:58,582 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5372388737511353 [2022-12-13 21:04:58,582 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 1183 transitions. [2022-12-13 21:04:58,582 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 1183 transitions. [2022-12-13 21:04:58,583 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-12-13 21:04:58,583 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 1183 transitions. [2022-12-13 21:04:58,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 197.16666666666666) internal successors, (1183), 6 states have internal predecessors, (1183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-12-13 21:04:58,586 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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 21:04:58,587 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 367.0) internal successors, (2569), 7 states have internal predecessors, (2569), 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 21:04:58,587 INFO L175 Difference]: Start difference. First operand has 74 places, 57 transitions, 156 flow. Second operand 6 states and 1183 transitions. [2022-12-13 21:04:58,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 153 transitions, 636 flow [2022-12-13 21:04:58,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 153 transitions, 622 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-12-13 21:04:58,605 INFO L231 Difference]: Finished difference. Result has 76 places, 60 transitions, 182 flow [2022-12-13 21:04:58,605 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=367, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=76, PETRI_TRANSITIONS=60} [2022-12-13 21:04:58,606 INFO L288 CegarLoopForPetriNet]: 71 programPoint places, 5 predicate places. [2022-12-13 21:04:58,606 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 60 transitions, 182 flow [2022-12-13 21:04:58,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 175.28571428571428) internal successors, (1227), 7 states have internal predecessors, (1227), 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 21:04:58,607 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:04:58,607 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1] [2022-12-13 21:04:58,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-12-13 21:04:58,807 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e772bbd7-88bc-49aa-92d5-9c0806474a02/bin/uautomizer-uyxdKDjOR8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-12-13 21:04:58,808 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:04:58,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:04:58,809 INFO L85 PathProgramCache]: Analyzing trace with hash 1117752004, now seen corresponding path program 1 times [2022-12-13 21:04:58,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:04:58,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747649961] [2022-12-13 21:04:58,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:04:58,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:04:58,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:04:58,852 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-12-13 21:04:58,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-12-13 21:04:58,872 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-12-13 21:04:58,872 INFO L360 BasicCegarLoop]: Counterexample is feasible [2022-12-13 21:04:58,872 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 2 remaining) [2022-12-13 21:04:58,872 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 2 remaining) [2022-12-13 21:04:58,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-12-13 21:04:58,872 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1] [2022-12-13 21:04:58,873 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-12-13 21:04:58,873 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-12-13 21:04:58,893 INFO L144 ThreadInstanceAdder]: Constructed 5 joinOtherThreadTransitions. [2022-12-13 21:04:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:58,989 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2022-12-13 21:04:58,989 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 21:04:58,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4047 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 610. Up to 80 conditions per place. [2022-12-13 21:04:58,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:58,998 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:58,998 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2022-12-13 21:04:58,998 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:58,999 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:58,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 221 places, 250 transitions, 560 flow [2022-12-13 21:04:59,087 INFO L130 PetriNetUnfolder]: 140/900 cut-off events. [2022-12-13 21:04:59,087 INFO L131 PetriNetUnfolder]: For 110/110 co-relation queries the response was YES. [2022-12-13 21:04:59,092 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1011 conditions, 900 events. 140/900 cut-off events. For 110/110 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 4047 event pairs, 23 based on Foata normal form. 0/770 useless extension candidates. Maximal degree in co-relation 610. Up to 80 conditions per place. [2022-12-13 21:04:59,115 INFO L119 LiptonReduction]: Number of co-enabled transitions 36800 [2022-12-13 21:05:01,737 INFO L134 LiptonReduction]: Checked pairs total: 89661 [2022-12-13 21:05:01,737 INFO L136 LiptonReduction]: Total number of compositions: 168 [2022-12-13 21:05:01,738 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-12-13 21:05:01,738 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;@2e650106, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2022-12-13 21:05:01,738 INFO L358 AbstractCegarLoop]: Starting to check reachability of 2 error locations. [2022-12-13 21:05:01,739 INFO L130 PetriNetUnfolder]: 2/9 cut-off events. [2022-12-13 21:05:01,739 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-12-13 21:05:01,739 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-12-13 21:05:01,739 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2022-12-13 21:05:01,740 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-12-13 21:05:01,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-12-13 21:05:01,740 INFO L85 PathProgramCache]: Analyzing trace with hash 59303063, now seen corresponding path program 1 times [2022-12-13 21:05:01,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-12-13 21:05:01,740 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013212793] [2022-12-13 21:05:01,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-12-13 21:05:01,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-12-13 21:05:01,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-12-13 21:05:01,756 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 21:05:01,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-12-13 21:05:01,756 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013212793] [2022-12-13 21:05:01,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013212793] provided 1 perfect and 0 imperfect interpolant sequences [2022-12-13 21:05:01,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-12-13 21:05:01,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-12-13 21:05:01,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397138579] [2022-12-13 21:05:01,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-12-13 21:05:01,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-12-13 21:05:01,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-12-13 21:05:01,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-12-13 21:05:01,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-12-13 21:05:01,766 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 200 out of 418 [2022-12-13 21:05:01,767 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 111 transitions, 282 flow. Second operand has 3 states, 3 states have (on average 201.0) internal successors, (603), 3 states have internal predecessors, (603), 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 21:05:01,767 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-12-13 21:05:01,767 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 200 of 418 [2022-12-13 21:05:01,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand