./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a --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 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 --- 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-b5237d8 [2022-11-21 17:14:01,829 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 17:14:01,830 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 17:14:01,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 17:14:01,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 17:14:01,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 17:14:01,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 17:14:01,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 17:14:01,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 17:14:01,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 17:14:01,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 17:14:01,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 17:14:01,862 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 17:14:01,863 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 17:14:01,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 17:14:01,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 17:14:01,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 17:14:01,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 17:14:01,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 17:14:01,871 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 17:14:01,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 17:14:01,874 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 17:14:01,875 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 17:14:01,876 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 17:14:01,880 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 17:14:01,881 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 17:14:01,881 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 17:14:01,882 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 17:14:01,883 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 17:14:01,884 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 17:14:01,884 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 17:14:01,885 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 17:14:01,886 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 17:14:01,887 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 17:14:01,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 17:14:01,889 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 17:14:01,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 17:14:01,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 17:14:01,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 17:14:01,891 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 17:14:01,892 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 17:14:01,893 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 17:14:01,917 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 17:14:01,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 17:14:01,918 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 17:14:01,918 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 17:14:01,919 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 17:14:01,919 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 17:14:01,920 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 17:14:01,921 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 17:14:01,921 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 17:14:01,921 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 17:14:01,922 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 17:14:01,922 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 17:14:01,922 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 17:14:01,923 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 17:14:01,923 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 17:14:01,923 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 17:14:01,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 17:14:01,924 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 17:14:01,924 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 17:14:01,925 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 17:14:01,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 17:14:01,925 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 17:14:01,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 17:14:01,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 17:14:01,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:14:01,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 17:14:01,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 17:14:01,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 17:14:01,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 17:14:01,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 17:14:01,928 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 17:14:01,929 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 17:14:01,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 17:14:01,929 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 963498115a8eca6e92c68ab7fa8168826446f05b9b398350c3ee0745adf1bb45 [2022-11-21 17:14:02,187 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 17:14:02,208 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 17:14:02,210 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 17:14:02,212 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 17:14:02,212 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 17:14:02,213 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-21 17:14:05,213 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 17:14:05,549 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 17:14:05,549 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i [2022-11-21 17:14:05,563 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/data/2a0d670d7/aba9ab4ee82f43488a3cde9c92989aa8/FLAG2bb48d8c9 [2022-11-21 17:14:05,578 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/data/2a0d670d7/aba9ab4ee82f43488a3cde9c92989aa8 [2022-11-21 17:14:05,581 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 17:14:05,582 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 17:14:05,584 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 17:14:05,584 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 17:14:05,594 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 17:14:05,595 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:14:05" (1/1) ... [2022-11-21 17:14:05,596 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7619df48 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:05, skipping insertion in model container [2022-11-21 17:14:05,597 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 05:14:05" (1/1) ... [2022-11-21 17:14:05,605 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 17:14:05,644 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 17:14:05,994 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_d82ab429-a5b3-4d21-9d83-e4838389a4ed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-21 17:14:06,005 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:14:06,017 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 17:14:06,053 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_d82ab429-a5b3-4d21-9d83-e4838389a4ed/sv-benchmarks/c/pthread-ext/11_fmaxsymopt.i[30540,30553] [2022-11-21 17:14:06,056 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 17:14:06,101 INFO L208 MainTranslator]: Completed translation [2022-11-21 17:14:06,102 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06 WrapperNode [2022-11-21 17:14:06,102 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 17:14:06,104 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 17:14:06,104 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 17:14:06,105 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 17:14:06,113 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,146 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,182 INFO L138 Inliner]: procedures = 171, calls = 24, calls flagged for inlining = 8, calls inlined = 8, statements flattened = 82 [2022-11-21 17:14:06,182 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 17:14:06,183 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 17:14:06,183 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 17:14:06,183 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 17:14:06,193 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,200 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,201 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,213 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,216 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,218 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,219 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,222 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 17:14:06,225 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 17:14:06,226 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 17:14:06,227 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 17:14:06,228 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (1/1) ... [2022-11-21 17:14:06,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 17:14:06,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 17:14:06,265 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 17:14:06,281 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d82ab429-a5b3-4d21-9d83-e4838389a4ed/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 17:14:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 17:14:06,306 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2022-11-21 17:14:06,306 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2022-11-21 17:14:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 17:14:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 17:14:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 17:14:06,307 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 17:14:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 17:14:06,308 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 17:14:06,308 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 17:14:06,310 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 17:14:06,430 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 17:14:06,432 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 17:14:06,658 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 17:14:06,735 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 17:14:06,735 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 17:14:06,738 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:14:06 BoogieIcfgContainer [2022-11-21 17:14:06,738 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 17:14:06,741 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 17:14:06,741 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 17:14:06,749 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 17:14:06,752 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 05:14:05" (1/3) ... [2022-11-21 17:14:06,753 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a71cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:14:06, skipping insertion in model container [2022-11-21 17:14:06,753 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 05:14:06" (2/3) ... [2022-11-21 17:14:06,754 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48a71cd4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 05:14:06, skipping insertion in model container [2022-11-21 17:14:06,756 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 05:14:06" (3/3) ... [2022-11-21 17:14:06,757 INFO L112 eAbstractionObserver]: Analyzing ICFG 11_fmaxsymopt.i [2022-11-21 17:14:06,767 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 17:14:06,779 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 17:14:06,779 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-21 17:14:06,779 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 17:14:06,891 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:14:06,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 85 transitions, 175 flow [2022-11-21 17:14:06,972 INFO L130 PetriNetUnfolder]: 9/96 cut-off events. [2022-11-21 17:14:06,973 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:14:06,978 INFO L83 FinitePrefix]: Finished finitePrefix Result has 101 conditions, 96 events. 9/96 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 95 event pairs, 0 based on Foata normal form. 0/84 useless extension candidates. Maximal degree in co-relation 60. Up to 4 conditions per place. [2022-11-21 17:14:06,979 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 85 transitions, 175 flow [2022-11-21 17:14:06,983 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 80 places, 85 transitions, 175 flow [2022-11-21 17:14:06,995 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:14:07,002 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;@104792ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:14:07,002 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-21 17:14:07,021 INFO L130 PetriNetUnfolder]: 2/53 cut-off events. [2022-11-21 17:14:07,026 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-21 17:14:07,026 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:07,027 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:07,027 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-11-21 17:14:07,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:07,047 INFO L85 PathProgramCache]: Analyzing trace with hash -1595637654, now seen corresponding path program 1 times [2022-11-21 17:14:07,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:07,065 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833267603] [2022-11-21 17:14:07,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:07,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,280 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:14:07,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,360 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:14:07,366 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:14:07,369 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (2 of 3 remaining) [2022-11-21 17:14:07,371 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2022-11-21 17:14:07,372 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 3 remaining) [2022-11-21 17:14:07,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 17:14:07,373 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 17:14:07,392 WARN L233 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:14:07,399 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2022-11-21 17:14:07,446 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:14:07,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 123 places, 133 transitions, 278 flow [2022-11-21 17:14:07,500 INFO L130 PetriNetUnfolder]: 17/157 cut-off events. [2022-11-21 17:14:07,500 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:14:07,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167 conditions, 157 events. 17/157 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 279 event pairs, 0 based on Foata normal form. 0/135 useless extension candidates. Maximal degree in co-relation 107. Up to 6 conditions per place. [2022-11-21 17:14:07,503 INFO L82 GeneralOperation]: Start removeDead. Operand has 123 places, 133 transitions, 278 flow [2022-11-21 17:14:07,506 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 133 transitions, 278 flow [2022-11-21 17:14:07,508 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:14:07,509 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;@104792ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:14:07,509 INFO L358 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2022-11-21 17:14:07,530 INFO L130 PetriNetUnfolder]: 4/84 cut-off events. [2022-11-21 17:14:07,530 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 17:14:07,531 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:07,531 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:07,531 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 1 more)] === [2022-11-21 17:14:07,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:07,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1914301512, now seen corresponding path program 1 times [2022-11-21 17:14:07,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:07,533 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998377141] [2022-11-21 17:14:07,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:07,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,584 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:14:07,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,617 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:14:07,617 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:14:07,618 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (3 of 4 remaining) [2022-11-21 17:14:07,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 4 remaining) [2022-11-21 17:14:07,618 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 4 remaining) [2022-11-21 17:14:07,619 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 4 remaining) [2022-11-21 17:14:07,619 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 17:14:07,619 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 17:14:07,620 WARN L233 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:14:07,620 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2022-11-21 17:14:07,690 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:14:07,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 181 transitions, 383 flow [2022-11-21 17:14:07,749 INFO L130 PetriNetUnfolder]: 25/218 cut-off events. [2022-11-21 17:14:07,749 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 17:14:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 234 conditions, 218 events. 25/218 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 523 event pairs, 0 based on Foata normal form. 0/186 useless extension candidates. Maximal degree in co-relation 161. Up to 8 conditions per place. [2022-11-21 17:14:07,754 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 181 transitions, 383 flow [2022-11-21 17:14:07,757 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 166 places, 181 transitions, 383 flow [2022-11-21 17:14:07,758 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:14:07,760 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;@104792ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:14:07,760 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2022-11-21 17:14:07,784 INFO L130 PetriNetUnfolder]: 8/126 cut-off events. [2022-11-21 17:14:07,784 INFO L131 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2022-11-21 17:14:07,784 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:07,784 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:07,785 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 2 more)] === [2022-11-21 17:14:07,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:07,785 INFO L85 PathProgramCache]: Analyzing trace with hash 1234620963, now seen corresponding path program 1 times [2022-11-21 17:14:07,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:07,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950059780] [2022-11-21 17:14:07,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:07,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:07,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,826 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:14:07,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:07,871 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:14:07,877 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:14:07,878 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 5 remaining) [2022-11-21 17:14:07,879 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 5 remaining) [2022-11-21 17:14:07,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 5 remaining) [2022-11-21 17:14:07,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 5 remaining) [2022-11-21 17:14:07,880 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 5 remaining) [2022-11-21 17:14:07,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 17:14:07,882 INFO L444 BasicCegarLoop]: Path program histogram: [1] [2022-11-21 17:14:07,883 WARN L233 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:14:07,884 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2022-11-21 17:14:07,970 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:14:07,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 209 places, 229 transitions, 490 flow [2022-11-21 17:14:08,067 INFO L130 PetriNetUnfolder]: 33/279 cut-off events. [2022-11-21 17:14:08,068 INFO L131 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2022-11-21 17:14:08,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 302 conditions, 279 events. 33/279 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 795 event pairs, 0 based on Foata normal form. 0/237 useless extension candidates. Maximal degree in co-relation 226. Up to 10 conditions per place. [2022-11-21 17:14:08,078 INFO L82 GeneralOperation]: Start removeDead. Operand has 209 places, 229 transitions, 490 flow [2022-11-21 17:14:08,086 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 209 places, 229 transitions, 490 flow [2022-11-21 17:14:08,090 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:14:08,092 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;@104792ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:14:08,096 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 17:14:08,123 INFO L130 PetriNetUnfolder]: 12/149 cut-off events. [2022-11-21 17:14:08,123 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-21 17:14:08,123 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:08,124 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:08,125 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 17:14:08,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1009700196, now seen corresponding path program 1 times [2022-11-21 17:14:08,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:08,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154991537] [2022-11-21 17:14:08,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:08,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:08,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:08,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:08,353 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154991537] [2022-11-21 17:14:08,354 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154991537] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:08,354 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:08,355 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:14:08,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081975968] [2022-11-21 17:14:08,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:08,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:14:08,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:08,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:14:08,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:14:08,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 199 out of 229 [2022-11-21 17:14:08,433 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 229 transitions, 490 flow. Second operand has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:08,433 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:08,433 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 199 of 229 [2022-11-21 17:14:08,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:09,119 INFO L130 PetriNetUnfolder]: 364/2258 cut-off events. [2022-11-21 17:14:09,120 INFO L131 PetriNetUnfolder]: For 496/496 co-relation queries the response was YES. [2022-11-21 17:14:09,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2878 conditions, 2258 events. 364/2258 cut-off events. For 496/496 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 18213 event pairs, 204 based on Foata normal form. 517/2518 useless extension candidates. Maximal degree in co-relation 884. Up to 325 conditions per place. [2022-11-21 17:14:09,155 INFO L137 encePairwiseOnDemand]: 215/229 looper letters, 12 selfloop transitions, 0 changer transitions 0/206 dead transitions. [2022-11-21 17:14:09,155 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 206 transitions, 468 flow [2022-11-21 17:14:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:14:09,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 17:14:09,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 424 transitions. [2022-11-21 17:14:09,181 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.925764192139738 [2022-11-21 17:14:09,182 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 424 transitions. [2022-11-21 17:14:09,182 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 424 transitions. [2022-11-21 17:14:09,187 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:09,190 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 424 transitions. [2022-11-21 17:14:09,198 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 212.0) internal successors, (424), 2 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:09,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:09,205 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 229.0) internal successors, (687), 3 states have internal predecessors, (687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:09,207 INFO L175 Difference]: Start difference. First operand has 209 places, 229 transitions, 490 flow. Second operand 2 states and 424 transitions. [2022-11-21 17:14:09,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 206 transitions, 468 flow [2022-11-21 17:14:09,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 206 transitions, 456 flow, removed 6 selfloop flow, removed 0 redundant places. [2022-11-21 17:14:09,226 INFO L231 Difference]: Finished difference. Result has 200 places, 206 transitions, 432 flow [2022-11-21 17:14:09,228 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=432, PETRI_PLACES=200, PETRI_TRANSITIONS=206} [2022-11-21 17:14:09,233 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -9 predicate places. [2022-11-21 17:14:09,234 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 206 transitions, 432 flow [2022-11-21 17:14:09,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 201.0) internal successors, (402), 2 states have internal predecessors, (402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:09,234 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:09,235 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:09,236 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-21 17:14:09,236 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 17:14:09,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:09,237 INFO L85 PathProgramCache]: Analyzing trace with hash -981071045, now seen corresponding path program 1 times [2022-11-21 17:14:09,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:09,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069253756] [2022-11-21 17:14:09,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:09,238 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:09,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:09,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:09,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:09,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069253756] [2022-11-21 17:14:09,399 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069253756] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:09,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:09,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:09,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67130850] [2022-11-21 17:14:09,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:09,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:09,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:09,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:09,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:09,405 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 190 out of 229 [2022-11-21 17:14:09,406 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 206 transitions, 432 flow. Second operand has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:09,406 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:09,407 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 190 of 229 [2022-11-21 17:14:09,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:10,868 INFO L130 PetriNetUnfolder]: 1600/5568 cut-off events. [2022-11-21 17:14:10,868 INFO L131 PetriNetUnfolder]: For 586/586 co-relation queries the response was YES. [2022-11-21 17:14:10,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8026 conditions, 5568 events. 1600/5568 cut-off events. For 586/586 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 53347 event pairs, 852 based on Foata normal form. 0/4767 useless extension candidates. Maximal degree in co-relation 8019. Up to 1333 conditions per place. [2022-11-21 17:14:10,964 INFO L137 encePairwiseOnDemand]: 226/229 looper letters, 32 selfloop transitions, 2 changer transitions 0/219 dead transitions. [2022-11-21 17:14:10,965 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 219 transitions, 541 flow [2022-11-21 17:14:10,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:10,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:10,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 605 transitions. [2022-11-21 17:14:10,968 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8806404657933042 [2022-11-21 17:14:10,968 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 605 transitions. [2022-11-21 17:14:10,969 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 605 transitions. [2022-11-21 17:14:10,969 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:10,969 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 605 transitions. [2022-11-21 17:14:10,972 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 201.66666666666666) internal successors, (605), 3 states have internal predecessors, (605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:10,976 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:10,977 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:10,977 INFO L175 Difference]: Start difference. First operand has 200 places, 206 transitions, 432 flow. Second operand 3 states and 605 transitions. [2022-11-21 17:14:10,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 219 transitions, 541 flow [2022-11-21 17:14:10,982 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 219 transitions, 541 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:14:10,990 INFO L231 Difference]: Finished difference. Result has 203 places, 207 transitions, 444 flow [2022-11-21 17:14:10,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=432, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=444, PETRI_PLACES=203, PETRI_TRANSITIONS=207} [2022-11-21 17:14:10,996 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -6 predicate places. [2022-11-21 17:14:10,996 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 207 transitions, 444 flow [2022-11-21 17:14:10,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 192.66666666666666) internal successors, (578), 3 states have internal predecessors, (578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:10,997 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:10,997 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:10,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 17:14:10,999 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 17:14:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:11,005 INFO L85 PathProgramCache]: Analyzing trace with hash 568658758, now seen corresponding path program 1 times [2022-11-21 17:14:11,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:11,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687652869] [2022-11-21 17:14:11,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:11,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:11,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:11,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:11,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:11,090 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687652869] [2022-11-21 17:14:11,090 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687652869] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:11,090 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:11,090 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:11,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619411554] [2022-11-21 17:14:11,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:11,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:11,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:11,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:11,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:11,094 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 185 out of 229 [2022-11-21 17:14:11,095 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 207 transitions, 444 flow. Second operand has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:11,095 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:11,095 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 185 of 229 [2022-11-21 17:14:11,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:12,555 INFO L130 PetriNetUnfolder]: 1855/6197 cut-off events. [2022-11-21 17:14:12,556 INFO L131 PetriNetUnfolder]: For 725/725 co-relation queries the response was YES. [2022-11-21 17:14:12,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9408 conditions, 6197 events. 1855/6197 cut-off events. For 725/725 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 59904 event pairs, 609 based on Foata normal form. 0/5423 useless extension candidates. Maximal degree in co-relation 9399. Up to 1330 conditions per place. [2022-11-21 17:14:12,655 INFO L137 encePairwiseOnDemand]: 225/229 looper letters, 32 selfloop transitions, 3 changer transitions 0/216 dead transitions. [2022-11-21 17:14:12,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 216 transitions, 547 flow [2022-11-21 17:14:12,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:12,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:12,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 591 transitions. [2022-11-21 17:14:12,658 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8602620087336245 [2022-11-21 17:14:12,658 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 591 transitions. [2022-11-21 17:14:12,658 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 591 transitions. [2022-11-21 17:14:12,659 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:12,659 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 591 transitions. [2022-11-21 17:14:12,661 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 197.0) internal successors, (591), 3 states have internal predecessors, (591), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:12,663 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:12,663 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 229.0) internal successors, (916), 4 states have internal predecessors, (916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:12,663 INFO L175 Difference]: Start difference. First operand has 203 places, 207 transitions, 444 flow. Second operand 3 states and 591 transitions. [2022-11-21 17:14:12,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 216 transitions, 547 flow [2022-11-21 17:14:12,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 216 transitions, 545 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:14:12,670 INFO L231 Difference]: Finished difference. Result has 205 places, 207 transitions, 453 flow [2022-11-21 17:14:12,671 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=229, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=453, PETRI_PLACES=205, PETRI_TRANSITIONS=207} [2022-11-21 17:14:12,672 INFO L288 CegarLoopForPetriNet]: 209 programPoint places, -4 predicate places. [2022-11-21 17:14:12,672 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 207 transitions, 453 flow [2022-11-21 17:14:12,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 187.33333333333334) internal successors, (562), 3 states have internal predecessors, (562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:12,673 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:12,673 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:12,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 17:14:12,674 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 3 more)] === [2022-11-21 17:14:12,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:12,674 INFO L85 PathProgramCache]: Analyzing trace with hash 2130882885, now seen corresponding path program 1 times [2022-11-21 17:14:12,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:12,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236939541] [2022-11-21 17:14:12,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:12,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:12,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:12,696 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-21 17:14:12,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-21 17:14:12,718 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-21 17:14:12,719 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-21 17:14:12,719 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 6 remaining) [2022-11-21 17:14:12,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (4 of 6 remaining) [2022-11-21 17:14:12,719 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (3 of 6 remaining) [2022-11-21 17:14:12,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (2 of 6 remaining) [2022-11-21 17:14:12,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (1 of 6 remaining) [2022-11-21 17:14:12,720 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (0 of 6 remaining) [2022-11-21 17:14:12,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 17:14:12,721 INFO L444 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2022-11-21 17:14:12,721 WARN L233 ceAbstractionStarter]: 4 thread instances were not sufficient, I will increase this number and restart the analysis [2022-11-21 17:14:12,722 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 5 thread instances. [2022-11-21 17:14:12,776 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-21 17:14:12,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 252 places, 277 transitions, 599 flow [2022-11-21 17:14:12,864 INFO L130 PetriNetUnfolder]: 41/340 cut-off events. [2022-11-21 17:14:12,865 INFO L131 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-11-21 17:14:12,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 340 events. 41/340 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 1057 event pairs, 0 based on Foata normal form. 0/288 useless extension candidates. Maximal degree in co-relation 292. Up to 12 conditions per place. [2022-11-21 17:14:12,869 INFO L82 GeneralOperation]: Start removeDead. Operand has 252 places, 277 transitions, 599 flow [2022-11-21 17:14:12,874 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 252 places, 277 transitions, 599 flow [2022-11-21 17:14:12,875 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 17:14:12,876 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;@104792ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 17:14:12,876 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2022-11-21 17:14:12,897 INFO L130 PetriNetUnfolder]: 12/150 cut-off events. [2022-11-21 17:14:12,897 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-21 17:14:12,897 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:12,898 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:12,898 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:12,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:12,898 INFO L85 PathProgramCache]: Analyzing trace with hash -635192437, now seen corresponding path program 1 times [2022-11-21 17:14:12,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:12,899 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623547524] [2022-11-21 17:14:12,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:12,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:12,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:12,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:12,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:12,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623547524] [2022-11-21 17:14:12,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623547524] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:12,935 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:12,935 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-21 17:14:12,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76618573] [2022-11-21 17:14:12,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:12,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-21 17:14:12,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:12,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-21 17:14:12,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-21 17:14:12,937 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 240 out of 277 [2022-11-21 17:14:12,938 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 277 transitions, 599 flow. Second operand has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:12,938 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:12,938 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 240 of 277 [2022-11-21 17:14:12,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:14,975 INFO L130 PetriNetUnfolder]: 1336/7010 cut-off events. [2022-11-21 17:14:14,975 INFO L131 PetriNetUnfolder]: For 2359/2359 co-relation queries the response was YES. [2022-11-21 17:14:15,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9305 conditions, 7010 events. 1336/7010 cut-off events. For 2359/2359 co-relation queries the response was YES. Maximal size of possible extension queue 226. Compared 72978 event pairs, 852 based on Foata normal form. 1912/8143 useless extension candidates. Maximal degree in co-relation 2918. Up to 1216 conditions per place. [2022-11-21 17:14:15,080 INFO L137 encePairwiseOnDemand]: 260/277 looper letters, 15 selfloop transitions, 0 changer transitions 0/250 dead transitions. [2022-11-21 17:14:15,080 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 250 transitions, 575 flow [2022-11-21 17:14:15,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-21 17:14:15,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-21 17:14:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 512 transitions. [2022-11-21 17:14:15,087 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.924187725631769 [2022-11-21 17:14:15,087 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 512 transitions. [2022-11-21 17:14:15,088 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 512 transitions. [2022-11-21 17:14:15,088 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:15,088 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 512 transitions. [2022-11-21 17:14:15,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 256.0) internal successors, (512), 2 states have internal predecessors, (512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:15,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:15,092 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 277.0) internal successors, (831), 3 states have internal predecessors, (831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:15,094 INFO L175 Difference]: Start difference. First operand has 252 places, 277 transitions, 599 flow. Second operand 2 states and 512 transitions. [2022-11-21 17:14:15,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 250 transitions, 575 flow [2022-11-21 17:14:15,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 250 transitions, 555 flow, removed 10 selfloop flow, removed 0 redundant places. [2022-11-21 17:14:15,100 INFO L231 Difference]: Finished difference. Result has 242 places, 250 transitions, 525 flow [2022-11-21 17:14:15,101 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=525, PETRI_PLACES=242, PETRI_TRANSITIONS=250} [2022-11-21 17:14:15,102 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -10 predicate places. [2022-11-21 17:14:15,102 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 250 transitions, 525 flow [2022-11-21 17:14:15,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 242.0) internal successors, (484), 2 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:15,103 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:15,103 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:15,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 17:14:15,104 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:15,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:15,104 INFO L85 PathProgramCache]: Analyzing trace with hash -606563286, now seen corresponding path program 1 times [2022-11-21 17:14:15,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:15,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789297900] [2022-11-21 17:14:15,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:15,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:15,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:15,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:15,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:15,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789297900] [2022-11-21 17:14:15,187 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789297900] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:15,187 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:15,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:15,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172752373] [2022-11-21 17:14:15,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:15,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:15,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:15,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:15,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:15,191 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 277 [2022-11-21 17:14:15,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 250 transitions, 525 flow. Second operand has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:15,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:15,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 277 [2022-11-21 17:14:15,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:19,817 INFO L130 PetriNetUnfolder]: 6265/20703 cut-off events. [2022-11-21 17:14:19,817 INFO L131 PetriNetUnfolder]: For 1801/1801 co-relation queries the response was YES. [2022-11-21 17:14:19,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29363 conditions, 20703 events. 6265/20703 cut-off events. For 1801/1801 co-relation queries the response was YES. Maximal size of possible extension queue 697. Compared 245965 event pairs, 3444 based on Foata normal form. 0/17874 useless extension candidates. Maximal degree in co-relation 29355. Up to 4897 conditions per place. [2022-11-21 17:14:20,098 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 38 selfloop transitions, 2 changer transitions 0/266 dead transitions. [2022-11-21 17:14:20,099 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 266 transitions, 657 flow [2022-11-21 17:14:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 734 transitions. [2022-11-21 17:14:20,101 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8832731648616126 [2022-11-21 17:14:20,101 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 734 transitions. [2022-11-21 17:14:20,101 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 734 transitions. [2022-11-21 17:14:20,102 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:20,102 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 734 transitions. [2022-11-21 17:14:20,104 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.66666666666666) internal successors, (734), 3 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:20,106 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:20,106 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:20,107 INFO L175 Difference]: Start difference. First operand has 242 places, 250 transitions, 525 flow. Second operand 3 states and 734 transitions. [2022-11-21 17:14:20,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 266 transitions, 657 flow [2022-11-21 17:14:20,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 266 transitions, 657 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-21 17:14:20,112 INFO L231 Difference]: Finished difference. Result has 245 places, 251 transitions, 537 flow [2022-11-21 17:14:20,113 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=525, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=537, PETRI_PLACES=245, PETRI_TRANSITIONS=251} [2022-11-21 17:14:20,113 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -7 predicate places. [2022-11-21 17:14:20,113 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 251 transitions, 537 flow [2022-11-21 17:14:20,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 233.66666666666666) internal successors, (701), 3 states have internal predecessors, (701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:20,114 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:20,114 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:20,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-21 17:14:20,115 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:20,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:20,115 INFO L85 PathProgramCache]: Analyzing trace with hash -706502371, now seen corresponding path program 1 times [2022-11-21 17:14:20,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:20,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968651779] [2022-11-21 17:14:20,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:20,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:20,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 17:14:20,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:20,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968651779] [2022-11-21 17:14:20,155 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968651779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:20,155 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:20,155 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:20,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857599713] [2022-11-21 17:14:20,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:20,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:20,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:20,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:20,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:20,157 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 277 [2022-11-21 17:14:20,158 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 251 transitions, 537 flow. Second operand has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:20,159 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:20,159 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 277 [2022-11-21 17:14:20,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:24,578 INFO L130 PetriNetUnfolder]: 7276/22799 cut-off events. [2022-11-21 17:14:24,578 INFO L131 PetriNetUnfolder]: For 2192/2192 co-relation queries the response was YES. [2022-11-21 17:14:24,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33940 conditions, 22799 events. 7276/22799 cut-off events. For 2192/2192 co-relation queries the response was YES. Maximal size of possible extension queue 746. Compared 271461 event pairs, 2472 based on Foata normal form. 0/20093 useless extension candidates. Maximal degree in co-relation 33930. Up to 4813 conditions per place. [2022-11-21 17:14:25,012 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 38 selfloop transitions, 3 changer transitions 0/263 dead transitions. [2022-11-21 17:14:25,012 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 263 transitions, 663 flow [2022-11-21 17:14:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:25,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:25,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 720 transitions. [2022-11-21 17:14:25,016 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8664259927797834 [2022-11-21 17:14:25,016 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 720 transitions. [2022-11-21 17:14:25,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 720 transitions. [2022-11-21 17:14:25,017 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:25,017 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 720 transitions. [2022-11-21 17:14:25,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 240.0) internal successors, (720), 3 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:25,022 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:25,023 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:25,023 INFO L175 Difference]: Start difference. First operand has 245 places, 251 transitions, 537 flow. Second operand 3 states and 720 transitions. [2022-11-21 17:14:25,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 263 transitions, 663 flow [2022-11-21 17:14:25,028 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 263 transitions, 661 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:14:25,037 INFO L231 Difference]: Finished difference. Result has 247 places, 251 transitions, 546 flow [2022-11-21 17:14:25,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=533, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=546, PETRI_PLACES=247, PETRI_TRANSITIONS=251} [2022-11-21 17:14:25,040 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -5 predicate places. [2022-11-21 17:14:25,041 INFO L495 AbstractCegarLoop]: Abstraction has has 247 places, 251 transitions, 546 flow [2022-11-21 17:14:25,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.33333333333334) internal successors, (685), 3 states have internal predecessors, (685), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:25,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:25,042 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:25,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-21 17:14:25,042 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:25,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:25,043 INFO L85 PathProgramCache]: Analyzing trace with hash 680781651, now seen corresponding path program 1 times [2022-11-21 17:14:25,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:25,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732653255] [2022-11-21 17:14:25,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:25,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:25,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:25,131 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:14:25,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:25,132 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732653255] [2022-11-21 17:14:25,133 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732653255] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:25,133 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:25,133 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:25,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692501118] [2022-11-21 17:14:25,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:25,136 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 231 out of 277 [2022-11-21 17:14:25,137 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 247 places, 251 transitions, 546 flow. Second operand has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:25,138 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:25,138 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 231 of 277 [2022-11-21 17:14:25,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:28,628 INFO L130 PetriNetUnfolder]: 6004/17909 cut-off events. [2022-11-21 17:14:28,628 INFO L131 PetriNetUnfolder]: For 1769/1769 co-relation queries the response was YES. [2022-11-21 17:14:29,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26492 conditions, 17909 events. 6004/17909 cut-off events. For 1769/1769 co-relation queries the response was YES. Maximal size of possible extension queue 664. Compared 202790 event pairs, 3436 based on Foata normal form. 0/15492 useless extension candidates. Maximal degree in co-relation 26481. Up to 4880 conditions per place. [2022-11-21 17:14:29,202 INFO L137 encePairwiseOnDemand]: 274/277 looper letters, 37 selfloop transitions, 2 changer transitions 0/266 dead transitions. [2022-11-21 17:14:29,203 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 266 transitions, 669 flow [2022-11-21 17:14:29,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:29,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:29,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 733 transitions. [2022-11-21 17:14:29,206 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8820697954271961 [2022-11-21 17:14:29,206 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 733 transitions. [2022-11-21 17:14:29,206 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 733 transitions. [2022-11-21 17:14:29,207 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:29,207 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 733 transitions. [2022-11-21 17:14:29,209 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 244.33333333333334) internal successors, (733), 3 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:29,213 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:29,213 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:29,214 INFO L175 Difference]: Start difference. First operand has 247 places, 251 transitions, 546 flow. Second operand 3 states and 733 transitions. [2022-11-21 17:14:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 266 transitions, 669 flow [2022-11-21 17:14:29,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 266 transitions, 666 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:14:29,222 INFO L231 Difference]: Finished difference. Result has 249 places, 252 transitions, 555 flow [2022-11-21 17:14:29,223 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=543, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=555, PETRI_PLACES=249, PETRI_TRANSITIONS=252} [2022-11-21 17:14:29,223 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -3 predicate places. [2022-11-21 17:14:29,224 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 252 transitions, 555 flow [2022-11-21 17:14:29,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 234.0) internal successors, (702), 3 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:29,224 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:29,225 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:29,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-21 17:14:29,226 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:29,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:29,226 INFO L85 PathProgramCache]: Analyzing trace with hash 546484965, now seen corresponding path program 1 times [2022-11-21 17:14:29,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:29,229 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115553528] [2022-11-21 17:14:29,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:29,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:29,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:29,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-21 17:14:29,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:29,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115553528] [2022-11-21 17:14:29,283 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115553528] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:29,283 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:29,283 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 17:14:29,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971428500] [2022-11-21 17:14:29,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:29,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 17:14:29,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:29,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 17:14:29,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 17:14:29,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 226 out of 277 [2022-11-21 17:14:29,288 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 252 transitions, 555 flow. Second operand has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:29,288 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:29,288 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 226 of 277 [2022-11-21 17:14:29,289 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 17:14:33,327 INFO L130 PetriNetUnfolder]: 7009/20036 cut-off events. [2022-11-21 17:14:33,327 INFO L131 PetriNetUnfolder]: For 2182/2182 co-relation queries the response was YES. [2022-11-21 17:14:33,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31112 conditions, 20036 events. 7009/20036 cut-off events. For 2182/2182 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 228184 event pairs, 2467 based on Foata normal form. 0/17702 useless extension candidates. Maximal degree in co-relation 31100. Up to 4790 conditions per place. [2022-11-21 17:14:33,624 INFO L137 encePairwiseOnDemand]: 273/277 looper letters, 37 selfloop transitions, 3 changer transitions 0/263 dead transitions. [2022-11-21 17:14:33,624 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 263 transitions, 672 flow [2022-11-21 17:14:33,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 17:14:33,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 17:14:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 719 transitions. [2022-11-21 17:14:33,627 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.865222623345367 [2022-11-21 17:14:33,627 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 719 transitions. [2022-11-21 17:14:33,628 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 719 transitions. [2022-11-21 17:14:33,628 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 17:14:33,628 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 719 transitions. [2022-11-21 17:14:33,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 239.66666666666666) internal successors, (719), 3 states have internal predecessors, (719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:33,632 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:33,633 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 277.0) internal successors, (1108), 4 states have internal predecessors, (1108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:33,633 INFO L175 Difference]: Start difference. First operand has 249 places, 252 transitions, 555 flow. Second operand 3 states and 719 transitions. [2022-11-21 17:14:33,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 263 transitions, 672 flow [2022-11-21 17:14:33,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 263 transitions, 670 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 17:14:33,646 INFO L231 Difference]: Finished difference. Result has 251 places, 252 transitions, 564 flow [2022-11-21 17:14:33,646 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=277, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=564, PETRI_PLACES=251, PETRI_TRANSITIONS=252} [2022-11-21 17:14:33,647 INFO L288 CegarLoopForPetriNet]: 252 programPoint places, -1 predicate places. [2022-11-21 17:14:33,647 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 252 transitions, 564 flow [2022-11-21 17:14:33,648 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 228.66666666666666) internal successors, (686), 3 states have internal predecessors, (686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:33,648 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 17:14:33,648 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 17:14:33,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-21 17:14:33,649 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thr1Err0ASSERT_VIOLATIONERROR_FUNCTION === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION (and 4 more)] === [2022-11-21 17:14:33,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 17:14:33,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1342180526, now seen corresponding path program 1 times [2022-11-21 17:14:33,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 17:14:33,650 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103397621] [2022-11-21 17:14:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 17:14:33,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 17:14:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 17:14:33,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-21 17:14:33,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 17:14:33,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103397621] [2022-11-21 17:14:33,734 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103397621] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 17:14:33,734 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 17:14:33,734 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 17:14:33,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075470977] [2022-11-21 17:14:33,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 17:14:33,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 17:14:33,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 17:14:33,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 17:14:33,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 17:14:33,737 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 207 out of 277 [2022-11-21 17:14:33,738 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 252 transitions, 564 flow. Second operand has 4 states, 4 states have (on average 209.5) internal successors, (838), 4 states have internal predecessors, (838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 17:14:33,738 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 17:14:33,738 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 207 of 277 [2022-11-21 17:14:33,738 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand