./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f4b24e32 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --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 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e --- Real Ultimate output --- This is Ultimate 0.2.2-?-f4b24e3 [2022-07-13 22:23:41,170 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-07-13 22:23:41,173 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-07-13 22:23:41,217 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-07-13 22:23:41,219 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-07-13 22:23:41,220 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-07-13 22:23:41,223 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-07-13 22:23:41,227 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-07-13 22:23:41,228 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-07-13 22:23:41,232 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-07-13 22:23:41,233 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-07-13 22:23:41,234 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-07-13 22:23:41,234 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-07-13 22:23:41,236 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-07-13 22:23:41,237 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-07-13 22:23:41,239 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-07-13 22:23:41,239 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-07-13 22:23:41,241 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-07-13 22:23:41,243 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-07-13 22:23:41,247 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-07-13 22:23:41,249 INFO L181 SettingsManager]: Resetting HornVerifier preferences to default values [2022-07-13 22:23:41,249 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-07-13 22:23:41,250 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-07-13 22:23:41,251 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-07-13 22:23:41,252 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-07-13 22:23:41,257 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-07-13 22:23:41,257 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-07-13 22:23:41,258 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-07-13 22:23:41,258 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-07-13 22:23:41,259 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-07-13 22:23:41,260 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-07-13 22:23:41,260 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-07-13 22:23:41,262 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-07-13 22:23:41,262 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-07-13 22:23:41,263 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-07-13 22:23:41,263 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-07-13 22:23:41,263 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-07-13 22:23:41,264 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-07-13 22:23:41,264 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-07-13 22:23:41,264 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-07-13 22:23:41,265 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-07-13 22:23:41,266 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-07-13 22:23:41,267 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-07-13 22:23:41,295 INFO L113 SettingsManager]: Loading preferences was successful [2022-07-13 22:23:41,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-07-13 22:23:41,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-07-13 22:23:41,296 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-07-13 22:23:41,297 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-07-13 22:23:41,297 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-07-13 22:23:41,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-07-13 22:23:41,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-07-13 22:23:41,298 INFO L138 SettingsManager]: * Use SBE=true [2022-07-13 22:23:41,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-07-13 22:23:41,299 INFO L138 SettingsManager]: * sizeof long=4 [2022-07-13 22:23:41,299 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-07-13 22:23:41,299 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-07-13 22:23:41,299 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-07-13 22:23:41,299 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * sizeof long double=12 [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * Use constant arrays=true [2022-07-13 22:23:41,300 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-07-13 22:23:41,301 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-07-13 22:23:41,301 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-07-13 22:23:41,301 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-07-13 22:23:41,301 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:41,301 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-07-13 22:23:41,301 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-07-13 22:23:41,302 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-07-13 22:23:41,302 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-07-13 22:23:41,302 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-07-13 22:23:41,302 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-07-13 22:23:41,302 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-07-13 22:23:41,303 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-07-13 22:23:41,303 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:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 7071c3ff0bb3d9f81f254bc51d27ce3551a85cc081b1b878560a7d4c8f67639e [2022-07-13 22:23:41,471 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-07-13 22:23:41,486 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-07-13 22:23:41,489 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-07-13 22:23:41,490 INFO L271 PluginConnector]: Initializing CDTParser... [2022-07-13 22:23:41,490 INFO L275 PluginConnector]: CDTParser initialized [2022-07-13 22:23:41,491 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-07-13 22:23:41,545 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1561dc09/bba41cfa28854328a2bf302f31c10a47/FLAG0892c94cf [2022-07-13 22:23:41,905 INFO L306 CDTParser]: Found 1 translation units. [2022-07-13 22:23:41,906 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c [2022-07-13 22:23:41,910 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1561dc09/bba41cfa28854328a2bf302f31c10a47/FLAG0892c94cf [2022-07-13 22:23:41,923 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a1561dc09/bba41cfa28854328a2bf302f31c10a47 [2022-07-13 22:23:41,925 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-07-13 22:23:41,926 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-07-13 22:23:41,929 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:41,930 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-07-13 22:23:41,932 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-07-13 22:23:41,932 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:41" (1/1) ... [2022-07-13 22:23:41,933 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57322ebf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:41, skipping insertion in model container [2022-07-13 22:23:41,933 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.07 10:23:41" (1/1) ... [2022-07-13 22:23:41,938 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-07-13 22:23:41,952 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-07-13 22:23:42,073 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-07-13 22:23:42,078 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:42,083 INFO L203 MainTranslator]: Completed pre-run [2022-07-13 22:23:42,106 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-4.wvr.c[2572,2585] [2022-07-13 22:23:42,108 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-07-13 22:23:42,117 INFO L208 MainTranslator]: Completed translation [2022-07-13 22:23:42,117 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42 WrapperNode [2022-07-13 22:23:42,118 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-07-13 22:23:42,118 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:42,119 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-07-13 22:23:42,119 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-07-13 22:23:42,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,136 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,151 INFO L137 Inliner]: procedures = 24, calls = 36, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 154 [2022-07-13 22:23:42,152 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-07-13 22:23:42,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-07-13 22:23:42,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-07-13 22:23:42,152 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-07-13 22:23:42,158 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,158 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,160 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,167 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,168 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-07-13 22:23:42,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-07-13 22:23:42,180 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-07-13 22:23:42,181 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-07-13 22:23:42,181 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (1/1) ... [2022-07-13 22:23:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-07-13 22:23:42,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:42,205 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-07-13 22:23:42,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-07-13 22:23:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-07-13 22:23:42,235 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-07-13 22:23:42,235 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-07-13 22:23:42,236 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-07-13 22:23:42,236 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-07-13 22:23:42,237 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-07-13 22:23:42,237 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-07-13 22:23:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-07-13 22:23:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2022-07-13 22:23:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-07-13 22:23:42,239 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-07-13 22:23:42,239 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-07-13 22:23:42,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-07-13 22:23:42,241 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-07-13 22:23:42,297 INFO L234 CfgBuilder]: Building ICFG [2022-07-13 22:23:42,299 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-07-13 22:23:42,541 INFO L275 CfgBuilder]: Performing block encoding [2022-07-13 22:23:42,551 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-07-13 22:23:42,551 INFO L299 CfgBuilder]: Removed 3 assume(true) statements. [2022-07-13 22:23:42,553 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:42 BoogieIcfgContainer [2022-07-13 22:23:42,553 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-07-13 22:23:42,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-07-13 22:23:42,555 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-07-13 22:23:42,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-07-13 22:23:42,557 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.07 10:23:41" (1/3) ... [2022-07-13 22:23:42,557 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df357ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:42, skipping insertion in model container [2022-07-13 22:23:42,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.07 10:23:42" (2/3) ... [2022-07-13 22:23:42,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7df357ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 10:23:42, skipping insertion in model container [2022-07-13 22:23:42,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 10:23:42" (3/3) ... [2022-07-13 22:23:42,559 INFO L111 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2022-07-13 22:23:42,563 WARN L143 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-07-13 22:23:42,569 INFO L201 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-07-13 22:23:42,569 INFO L160 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-07-13 22:23:42,569 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-07-13 22:23:42,620 INFO L135 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-07-13 22:23:42,644 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 190 places, 199 transitions, 414 flow [2022-07-13 22:23:42,727 INFO L129 PetriNetUnfolder]: 16/197 cut-off events. [2022-07-13 22:23:42,727 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:42,732 INFO L84 FinitePrefix]: Finished finitePrefix Result has 206 conditions, 197 events. 16/197 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 171 event pairs, 0 based on Foata normal form. 0/180 useless extension candidates. Maximal degree in co-relation 110. Up to 2 conditions per place. [2022-07-13 22:23:42,732 INFO L82 GeneralOperation]: Start removeDead. Operand has 190 places, 199 transitions, 414 flow [2022-07-13 22:23:42,736 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 179 places, 188 transitions, 388 flow [2022-07-13 22:23:42,755 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-07-13 22:23:42,763 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=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@189c501, mLbeIndependenceSettings=de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings@38816c54 [2022-07-13 22:23:42,763 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-07-13 22:23:42,797 INFO L129 PetriNetUnfolder]: 13/155 cut-off events. [2022-07-13 22:23:42,797 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-07-13 22:23:42,798 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:42,798 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:42,800 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:42,804 INFO L85 PathProgramCache]: Analyzing trace with hash -973515238, now seen corresponding path program 1 times [2022-07-13 22:23:42,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:42,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891892786] [2022-07-13 22:23:42,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:42,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:42,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:43,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:43,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:43,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891892786] [2022-07-13 22:23:43,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891892786] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:43,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:43,028 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-07-13 22:23:43,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9642790] [2022-07-13 22:23:43,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:43,035 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-07-13 22:23:43,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:43,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-07-13 22:23:43,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-07-13 22:23:43,057 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 181 out of 199 [2022-07-13 22:23:43,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 388 flow. Second operand has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 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) [2022-07-13 22:23:43,062 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:43,062 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 181 of 199 [2022-07-13 22:23:43,063 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:43,091 INFO L129 PetriNetUnfolder]: 3/175 cut-off events. [2022-07-13 22:23:43,091 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-07-13 22:23:43,092 INFO L84 FinitePrefix]: Finished finitePrefix Result has 189 conditions, 175 events. 3/175 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 139 event pairs, 0 based on Foata normal form. 16/178 useless extension candidates. Maximal degree in co-relation 104. Up to 5 conditions per place. [2022-07-13 22:23:43,094 INFO L132 encePairwiseOnDemand]: 186/199 looper letters, 4 selfloop transitions, 0 changer transitions 5/175 dead transitions. [2022-07-13 22:23:43,094 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 175 transitions, 370 flow [2022-07-13 22:23:43,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-07-13 22:23:43,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-07-13 22:23:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 379 transitions. [2022-07-13 22:23:43,104 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.9522613065326633 [2022-07-13 22:23:43,104 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 379 transitions. [2022-07-13 22:23:43,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 379 transitions. [2022-07-13 22:23:43,106 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:43,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 379 transitions. [2022-07-13 22:23:43,111 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 189.5) internal successors, (379), 2 states have internal predecessors, (379), 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) [2022-07-13 22:23:43,114 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2022-07-13 22:23:43,115 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 199.0) internal successors, (597), 3 states have internal predecessors, (597), 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) [2022-07-13 22:23:43,116 INFO L186 Difference]: Start difference. First operand has 179 places, 188 transitions, 388 flow. Second operand 2 states and 379 transitions. [2022-07-13 22:23:43,117 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 175 transitions, 370 flow [2022-07-13 22:23:43,120 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 175 transitions, 362 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-07-13 22:23:43,122 INFO L242 Difference]: Finished difference. Result has 176 places, 170 transitions, 344 flow [2022-07-13 22:23:43,124 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=344, PETRI_PLACES=176, PETRI_TRANSITIONS=170} [2022-07-13 22:23:43,126 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, -3 predicate places. [2022-07-13 22:23:43,127 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 170 transitions, 344 flow [2022-07-13 22:23:43,127 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 183.5) internal successors, (367), 2 states have internal predecessors, (367), 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) [2022-07-13 22:23:43,127 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:43,127 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:43,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-07-13 22:23:43,128 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:43,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:43,128 INFO L85 PathProgramCache]: Analyzing trace with hash -366624895, now seen corresponding path program 1 times [2022-07-13 22:23:43,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:43,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999808769] [2022-07-13 22:23:43,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:43,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:43,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:43,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:43,367 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999808769] [2022-07-13 22:23:43,367 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999808769] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:43,368 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:43,368 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-07-13 22:23:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440493511] [2022-07-13 22:23:43,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:43,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-07-13 22:23:43,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:43,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-07-13 22:23:43,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-07-13 22:23:43,383 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-07-13 22:23:43,384 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 170 transitions, 344 flow. Second operand has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 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) [2022-07-13 22:23:43,384 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:43,384 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-07-13 22:23:43,384 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:43,510 INFO L129 PetriNetUnfolder]: 22/292 cut-off events. [2022-07-13 22:23:43,510 INFO L130 PetriNetUnfolder]: For 11/11 co-relation queries the response was YES. [2022-07-13 22:23:43,512 INFO L84 FinitePrefix]: Finished finitePrefix Result has 371 conditions, 292 events. 22/292 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 638 event pairs, 9 based on Foata normal form. 0/267 useless extension candidates. Maximal degree in co-relation 368. Up to 61 conditions per place. [2022-07-13 22:23:43,513 INFO L132 encePairwiseOnDemand]: 191/199 looper letters, 38 selfloop transitions, 7 changer transitions 0/174 dead transitions. [2022-07-13 22:23:43,513 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 174 transitions, 442 flow [2022-07-13 22:23:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-07-13 22:23:43,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-07-13 22:23:43,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1158 transitions. [2022-07-13 22:23:43,518 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7273869346733668 [2022-07-13 22:23:43,518 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1158 transitions. [2022-07-13 22:23:43,518 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1158 transitions. [2022-07-13 22:23:43,520 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:43,520 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1158 transitions. [2022-07-13 22:23:43,522 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 144.75) internal successors, (1158), 8 states have internal predecessors, (1158), 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) [2022-07-13 22:23:43,525 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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) [2022-07-13 22:23:43,526 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 199.0) internal successors, (1791), 9 states have internal predecessors, (1791), 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) [2022-07-13 22:23:43,526 INFO L186 Difference]: Start difference. First operand has 176 places, 170 transitions, 344 flow. Second operand 8 states and 1158 transitions. [2022-07-13 22:23:43,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 174 transitions, 442 flow [2022-07-13 22:23:43,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 174 transitions, 442 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:43,529 INFO L242 Difference]: Finished difference. Result has 179 places, 171 transitions, 366 flow [2022-07-13 22:23:43,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=170, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=366, PETRI_PLACES=179, PETRI_TRANSITIONS=171} [2022-07-13 22:23:43,530 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 0 predicate places. [2022-07-13 22:23:43,530 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 171 transitions, 366 flow [2022-07-13 22:23:43,531 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 143.0) internal successors, (1144), 8 states have internal predecessors, (1144), 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) [2022-07-13 22:23:43,531 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:43,531 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:43,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-07-13 22:23:43,531 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:43,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:43,532 INFO L85 PathProgramCache]: Analyzing trace with hash 1168250419, now seen corresponding path program 1 times [2022-07-13 22:23:43,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:43,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757395904] [2022-07-13 22:23:43,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:43,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:43,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:43,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757395904] [2022-07-13 22:23:43,627 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757395904] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:43,627 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:43,627 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-07-13 22:23:43,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895726789] [2022-07-13 22:23:43,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:43,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-07-13 22:23:43,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:43,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-07-13 22:23:43,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-07-13 22:23:43,629 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 139 out of 199 [2022-07-13 22:23:43,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 171 transitions, 366 flow. Second operand has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 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) [2022-07-13 22:23:43,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:43,631 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 139 of 199 [2022-07-13 22:23:43,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:43,813 INFO L129 PetriNetUnfolder]: 121/786 cut-off events. [2022-07-13 22:23:43,813 INFO L130 PetriNetUnfolder]: For 34/34 co-relation queries the response was YES. [2022-07-13 22:23:43,817 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1078 conditions, 786 events. 121/786 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 4220 event pairs, 38 based on Foata normal form. 1/731 useless extension candidates. Maximal degree in co-relation 1073. Up to 133 conditions per place. [2022-07-13 22:23:43,819 INFO L132 encePairwiseOnDemand]: 192/199 looper letters, 65 selfloop transitions, 5 changer transitions 4/204 dead transitions. [2022-07-13 22:23:43,819 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 204 transitions, 585 flow [2022-07-13 22:23:43,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-07-13 22:23:43,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-07-13 22:23:43,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 909 transitions. [2022-07-13 22:23:43,822 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.7613065326633166 [2022-07-13 22:23:43,822 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 909 transitions. [2022-07-13 22:23:43,822 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 909 transitions. [2022-07-13 22:23:43,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:43,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 909 transitions. [2022-07-13 22:23:43,825 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 151.5) internal successors, (909), 6 states have internal predecessors, (909), 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) [2022-07-13 22:23:43,827 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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) [2022-07-13 22:23:43,828 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 199.0) internal successors, (1393), 7 states have internal predecessors, (1393), 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) [2022-07-13 22:23:43,828 INFO L186 Difference]: Start difference. First operand has 179 places, 171 transitions, 366 flow. Second operand 6 states and 909 transitions. [2022-07-13 22:23:43,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 204 transitions, 585 flow [2022-07-13 22:23:43,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 204 transitions, 573 flow, removed 0 selfloop flow, removed 6 redundant places. [2022-07-13 22:23:43,834 INFO L242 Difference]: Finished difference. Result has 181 places, 174 transitions, 383 flow [2022-07-13 22:23:43,834 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=383, PETRI_PLACES=181, PETRI_TRANSITIONS=174} [2022-07-13 22:23:43,836 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 2 predicate places. [2022-07-13 22:23:43,836 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 174 transitions, 383 flow [2022-07-13 22:23:43,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 143.33333333333334) internal successors, (860), 6 states have internal predecessors, (860), 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) [2022-07-13 22:23:43,837 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:43,837 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:43,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-07-13 22:23:43,837 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:43,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:43,838 INFO L85 PathProgramCache]: Analyzing trace with hash -720647426, now seen corresponding path program 1 times [2022-07-13 22:23:43,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:43,839 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139076664] [2022-07-13 22:23:43,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:43,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:43,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:44,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139076664] [2022-07-13 22:23:44,009 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139076664] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:44,009 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294388516] [2022-07-13 22:23:44,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:44,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:44,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:44,011 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:44,012 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-07-13 22:23:44,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:44,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:44,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,192 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,291 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294388516] provided 1 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:44,291 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-07-13 22:23:44,291 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 5] total 9 [2022-07-13 22:23:44,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125931585] [2022-07-13 22:23:44,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:44,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:44,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:44,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:44,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-07-13 22:23:44,295 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-07-13 22:23:44,296 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 174 transitions, 383 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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) [2022-07-13 22:23:44,296 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:44,297 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-07-13 22:23:44,297 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:44,401 INFO L129 PetriNetUnfolder]: 112/822 cut-off events. [2022-07-13 22:23:44,404 INFO L130 PetriNetUnfolder]: For 30/30 co-relation queries the response was YES. [2022-07-13 22:23:44,406 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1089 conditions, 822 events. 112/822 cut-off events. For 30/30 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4265 event pairs, 13 based on Foata normal form. 0/723 useless extension candidates. Maximal degree in co-relation 1081. Up to 143 conditions per place. [2022-07-13 22:23:44,410 INFO L132 encePairwiseOnDemand]: 194/199 looper letters, 26 selfloop transitions, 5 changer transitions 1/186 dead transitions. [2022-07-13 22:23:44,410 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 186 transitions, 475 flow [2022-07-13 22:23:44,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:23:44,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:23:44,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 693 transitions. [2022-07-13 22:23:44,413 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8706030150753769 [2022-07-13 22:23:44,413 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 693 transitions. [2022-07-13 22:23:44,413 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 693 transitions. [2022-07-13 22:23:44,414 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:44,414 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 693 transitions. [2022-07-13 22:23:44,415 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 173.25) internal successors, (693), 4 states have internal predecessors, (693), 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) [2022-07-13 22:23:44,417 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-13 22:23:44,418 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-13 22:23:44,418 INFO L186 Difference]: Start difference. First operand has 181 places, 174 transitions, 383 flow. Second operand 4 states and 693 transitions. [2022-07-13 22:23:44,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 186 transitions, 475 flow [2022-07-13 22:23:44,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 186 transitions, 471 flow, removed 2 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:44,423 INFO L242 Difference]: Finished difference. Result has 183 places, 178 transitions, 415 flow [2022-07-13 22:23:44,424 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=170, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=415, PETRI_PLACES=183, PETRI_TRANSITIONS=178} [2022-07-13 22:23:44,424 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 4 predicate places. [2022-07-13 22:23:44,425 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 178 transitions, 415 flow [2022-07-13 22:23:44,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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) [2022-07-13 22:23:44,425 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:44,425 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:44,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:44,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:44,640 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:44,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:44,640 INFO L85 PathProgramCache]: Analyzing trace with hash -257953500, now seen corresponding path program 2 times [2022-07-13 22:23:44,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:44,640 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256595928] [2022-07-13 22:23:44,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:44,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:44,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:44,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256595928] [2022-07-13 22:23:44,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1256595928] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:44,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:44,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:23:44,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193041827] [2022-07-13 22:23:44,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:44,682 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:44,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:44,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:23:44,684 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 165 out of 199 [2022-07-13 22:23:44,684 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 178 transitions, 415 flow. Second operand has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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) [2022-07-13 22:23:44,684 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:44,684 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 165 of 199 [2022-07-13 22:23:44,684 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:44,782 INFO L129 PetriNetUnfolder]: 128/916 cut-off events. [2022-07-13 22:23:44,783 INFO L130 PetriNetUnfolder]: For 164/164 co-relation queries the response was YES. [2022-07-13 22:23:44,795 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1365 conditions, 916 events. 128/916 cut-off events. For 164/164 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 4738 event pairs, 46 based on Foata normal form. 2/864 useless extension candidates. Maximal degree in co-relation 1356. Up to 189 conditions per place. [2022-07-13 22:23:44,797 INFO L132 encePairwiseOnDemand]: 193/199 looper letters, 29 selfloop transitions, 6 changer transitions 0/189 dead transitions. [2022-07-13 22:23:44,797 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 189 transitions, 526 flow [2022-07-13 22:23:44,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:23:44,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:23:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 856 transitions. [2022-07-13 22:23:44,799 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8603015075376884 [2022-07-13 22:23:44,799 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 856 transitions. [2022-07-13 22:23:44,799 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 856 transitions. [2022-07-13 22:23:44,800 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:44,800 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 856 transitions. [2022-07-13 22:23:44,801 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 171.2) internal successors, (856), 5 states have internal predecessors, (856), 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) [2022-07-13 22:23:44,802 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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) [2022-07-13 22:23:44,803 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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) [2022-07-13 22:23:44,803 INFO L186 Difference]: Start difference. First operand has 183 places, 178 transitions, 415 flow. Second operand 5 states and 856 transitions. [2022-07-13 22:23:44,803 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 189 transitions, 526 flow [2022-07-13 22:23:44,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 189 transitions, 526 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-07-13 22:23:44,807 INFO L242 Difference]: Finished difference. Result has 189 places, 180 transitions, 450 flow [2022-07-13 22:23:44,808 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=415, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=450, PETRI_PLACES=189, PETRI_TRANSITIONS=180} [2022-07-13 22:23:44,809 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 10 predicate places. [2022-07-13 22:23:44,810 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 180 transitions, 450 flow [2022-07-13 22:23:44,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 167.75) internal successors, (671), 4 states have internal predecessors, (671), 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) [2022-07-13 22:23:44,810 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:44,810 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:44,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-07-13 22:23:44,811 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:44,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:44,811 INFO L85 PathProgramCache]: Analyzing trace with hash -1246680816, now seen corresponding path program 3 times [2022-07-13 22:23:44,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:44,812 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020651084] [2022-07-13 22:23:44,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:44,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:44,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:44,933 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:44,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020651084] [2022-07-13 22:23:44,934 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020651084] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:44,934 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831580722] [2022-07-13 22:23:44,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-07-13 22:23:44,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:44,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:44,936 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:44,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-07-13 22:23:45,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-07-13 22:23:45,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:23:45,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 6 conjunts are in the unsatisfiable core [2022-07-13 22:23:45,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:45,100 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:47,204 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831580722] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:47,204 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:47,204 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 12 [2022-07-13 22:23:47,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865105377] [2022-07-13 22:23:47,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:47,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-07-13 22:23:47,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:47,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-07-13 22:23:47,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=97, Unknown=1, NotChecked=0, Total=132 [2022-07-13 22:23:47,207 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 161 out of 199 [2022-07-13 22:23:47,208 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 180 transitions, 450 flow. Second operand has 12 states, 12 states have (on average 163.75) internal successors, (1965), 12 states have internal predecessors, (1965), 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) [2022-07-13 22:23:47,208 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:47,208 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 161 of 199 [2022-07-13 22:23:47,208 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:47,726 INFO L129 PetriNetUnfolder]: 275/1629 cut-off events. [2022-07-13 22:23:47,727 INFO L130 PetriNetUnfolder]: For 676/681 co-relation queries the response was YES. [2022-07-13 22:23:47,730 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2714 conditions, 1629 events. 275/1629 cut-off events. For 676/681 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 10317 event pairs, 56 based on Foata normal form. 40/1577 useless extension candidates. Maximal degree in co-relation 2702. Up to 144 conditions per place. [2022-07-13 22:23:47,734 INFO L132 encePairwiseOnDemand]: 189/199 looper letters, 114 selfloop transitions, 46 changer transitions 3/313 dead transitions. [2022-07-13 22:23:47,734 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 313 transitions, 1269 flow [2022-07-13 22:23:47,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-07-13 22:23:47,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2022-07-13 22:23:47,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 3225 transitions. [2022-07-13 22:23:47,740 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.85294895530283 [2022-07-13 22:23:47,740 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 3225 transitions. [2022-07-13 22:23:47,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 3225 transitions. [2022-07-13 22:23:47,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:47,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 3225 transitions. [2022-07-13 22:23:47,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 169.73684210526315) internal successors, (3225), 19 states have internal predecessors, (3225), 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) [2022-07-13 22:23:47,749 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 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) [2022-07-13 22:23:47,752 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 199.0) internal successors, (3980), 20 states have internal predecessors, (3980), 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) [2022-07-13 22:23:47,752 INFO L186 Difference]: Start difference. First operand has 189 places, 180 transitions, 450 flow. Second operand 19 states and 3225 transitions. [2022-07-13 22:23:47,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 313 transitions, 1269 flow [2022-07-13 22:23:47,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 313 transitions, 1231 flow, removed 11 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:47,759 INFO L242 Difference]: Finished difference. Result has 216 places, 225 transitions, 854 flow [2022-07-13 22:23:47,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=441, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=854, PETRI_PLACES=216, PETRI_TRANSITIONS=225} [2022-07-13 22:23:47,760 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 37 predicate places. [2022-07-13 22:23:47,760 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 225 transitions, 854 flow [2022-07-13 22:23:47,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 163.75) internal successors, (1965), 12 states have internal predecessors, (1965), 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) [2022-07-13 22:23:47,760 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:47,761 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:47,777 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-07-13 22:23:47,967 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2022-07-13 22:23:47,968 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:47,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:47,968 INFO L85 PathProgramCache]: Analyzing trace with hash -818561113, now seen corresponding path program 1 times [2022-07-13 22:23:47,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:47,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192847225] [2022-07-13 22:23:47,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:47,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:47,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:48,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:48,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192847225] [2022-07-13 22:23:48,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192847225] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:48,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:48,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:23:48,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106147344] [2022-07-13 22:23:48,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:48,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:48,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:48,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:48,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:23:48,008 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-07-13 22:23:48,009 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 225 transitions, 854 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-07-13 22:23:48,009 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:48,009 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-07-13 22:23:48,009 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:48,107 INFO L129 PetriNetUnfolder]: 94/864 cut-off events. [2022-07-13 22:23:48,108 INFO L130 PetriNetUnfolder]: For 1119/1213 co-relation queries the response was YES. [2022-07-13 22:23:48,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1693 conditions, 864 events. 94/864 cut-off events. For 1119/1213 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 4408 event pairs, 11 based on Foata normal form. 22/826 useless extension candidates. Maximal degree in co-relation 1670. Up to 128 conditions per place. [2022-07-13 22:23:48,112 INFO L132 encePairwiseOnDemand]: 193/199 looper letters, 45 selfloop transitions, 10 changer transitions 1/234 dead transitions. [2022-07-13 22:23:48,113 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 234 transitions, 1018 flow [2022-07-13 22:23:48,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-07-13 22:23:48,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2022-07-13 22:23:48,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 881 transitions. [2022-07-13 22:23:48,114 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8854271356783919 [2022-07-13 22:23:48,115 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 881 transitions. [2022-07-13 22:23:48,115 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 881 transitions. [2022-07-13 22:23:48,115 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:48,115 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 881 transitions. [2022-07-13 22:23:48,116 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 176.2) internal successors, (881), 5 states have internal predecessors, (881), 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) [2022-07-13 22:23:48,118 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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) [2022-07-13 22:23:48,119 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 199.0) internal successors, (1194), 6 states have internal predecessors, (1194), 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) [2022-07-13 22:23:48,119 INFO L186 Difference]: Start difference. First operand has 216 places, 225 transitions, 854 flow. Second operand 5 states and 881 transitions. [2022-07-13 22:23:48,119 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 234 transitions, 1018 flow [2022-07-13 22:23:48,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 234 transitions, 990 flow, removed 8 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:48,129 INFO L242 Difference]: Finished difference. Result has 219 places, 226 transitions, 875 flow [2022-07-13 22:23:48,129 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=875, PETRI_PLACES=219, PETRI_TRANSITIONS=226} [2022-07-13 22:23:48,130 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 40 predicate places. [2022-07-13 22:23:48,130 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 226 transitions, 875 flow [2022-07-13 22:23:48,130 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-07-13 22:23:48,130 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:48,130 INFO L200 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:48,130 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-07-13 22:23:48,131 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:48,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:48,131 INFO L85 PathProgramCache]: Analyzing trace with hash -895598935, now seen corresponding path program 2 times [2022-07-13 22:23:48,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:48,131 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81099733] [2022-07-13 22:23:48,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:48,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:48,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:23:48,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:48,192 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81099733] [2022-07-13 22:23:48,192 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81099733] provided 1 perfect and 0 imperfect interpolant sequences [2022-07-13 22:23:48,192 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-07-13 22:23:48,192 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-07-13 22:23:48,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991806604] [2022-07-13 22:23:48,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-07-13 22:23:48,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-07-13 22:23:48,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:48,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-07-13 22:23:48,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2022-07-13 22:23:48,194 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 171 out of 199 [2022-07-13 22:23:48,194 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 226 transitions, 875 flow. Second operand has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-07-13 22:23:48,194 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:48,194 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 171 of 199 [2022-07-13 22:23:48,195 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:23:48,316 INFO L129 PetriNetUnfolder]: 108/1057 cut-off events. [2022-07-13 22:23:48,316 INFO L130 PetriNetUnfolder]: For 1228/1287 co-relation queries the response was YES. [2022-07-13 22:23:48,319 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1991 conditions, 1057 events. 108/1057 cut-off events. For 1228/1287 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 5955 event pairs, 36 based on Foata normal form. 16/993 useless extension candidates. Maximal degree in co-relation 1966. Up to 156 conditions per place. [2022-07-13 22:23:48,322 INFO L132 encePairwiseOnDemand]: 194/199 looper letters, 49 selfloop transitions, 10 changer transitions 2/239 dead transitions. [2022-07-13 22:23:48,322 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 239 transitions, 1082 flow [2022-07-13 22:23:48,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-07-13 22:23:48,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-07-13 22:23:48,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 710 transitions. [2022-07-13 22:23:48,324 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.8919597989949749 [2022-07-13 22:23:48,324 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 710 transitions. [2022-07-13 22:23:48,324 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 710 transitions. [2022-07-13 22:23:48,324 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:23:48,324 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 710 transitions. [2022-07-13 22:23:48,325 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 177.5) internal successors, (710), 4 states have internal predecessors, (710), 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) [2022-07-13 22:23:48,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-13 22:23:48,327 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 199.0) internal successors, (995), 5 states have internal predecessors, (995), 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) [2022-07-13 22:23:48,327 INFO L186 Difference]: Start difference. First operand has 219 places, 226 transitions, 875 flow. Second operand 4 states and 710 transitions. [2022-07-13 22:23:48,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 239 transitions, 1082 flow [2022-07-13 22:23:48,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 239 transitions, 1059 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-07-13 22:23:48,334 INFO L242 Difference]: Finished difference. Result has 222 places, 229 transitions, 916 flow [2022-07-13 22:23:48,334 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=916, PETRI_PLACES=222, PETRI_TRANSITIONS=229} [2022-07-13 22:23:48,336 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 43 predicate places. [2022-07-13 22:23:48,336 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 229 transitions, 916 flow [2022-07-13 22:23:48,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 173.75) internal successors, (695), 4 states have internal predecessors, (695), 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) [2022-07-13 22:23:48,336 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:23:48,337 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:23:48,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-07-13 22:23:48,337 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:23:48,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:23:48,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1051090039, now seen corresponding path program 1 times [2022-07-13 22:23:48,338 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:23:48,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7440302] [2022-07-13 22:23:48,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:48,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:23:48,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:48,468 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2022-07-13 22:23:48,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:23:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7440302] [2022-07-13 22:23:48,469 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7440302] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:23:48,469 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254795564] [2022-07-13 22:23:48,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:23:48,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:23:48,470 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:23:48,471 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:23:48,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-07-13 22:23:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:23:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 40 conjunts are in the unsatisfiable core [2022-07-13 22:23:48,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:23:49,375 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:23:49,376 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:23:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:49,462 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:23:49,688 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:23:49,690 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 11 [2022-07-13 22:23:50,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-07-13 22:23:50,169 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [254795564] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:23:50,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:23:50,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 23, 22] total 44 [2022-07-13 22:23:50,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024072837] [2022-07-13 22:23:50,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:23:50,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-07-13 22:23:50,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:23:50,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-07-13 22:23:50,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=1688, Unknown=0, NotChecked=0, Total=1892 [2022-07-13 22:23:50,174 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 86 out of 199 [2022-07-13 22:23:50,176 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 229 transitions, 916 flow. Second operand has 44 states, 44 states have (on average 91.18181818181819) internal successors, (4012), 44 states have internal predecessors, (4012), 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) [2022-07-13 22:23:50,176 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:23:50,177 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 86 of 199 [2022-07-13 22:23:50,177 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-07-13 22:25:27,217 INFO L129 PetriNetUnfolder]: 44515/90282 cut-off events. [2022-07-13 22:25:27,218 INFO L130 PetriNetUnfolder]: For 78998/79456 co-relation queries the response was YES. [2022-07-13 22:25:27,638 INFO L84 FinitePrefix]: Finished finitePrefix Result has 207897 conditions, 90282 events. 44515/90282 cut-off events. For 78998/79456 co-relation queries the response was YES. Maximal size of possible extension queue 1645. Compared 947373 event pairs, 2366 based on Foata normal form. 813/84422 useless extension candidates. Maximal degree in co-relation 207870. Up to 15005 conditions per place. [2022-07-13 22:25:27,903 INFO L132 encePairwiseOnDemand]: 138/199 looper letters, 3760 selfloop transitions, 2137 changer transitions 2066/8054 dead transitions. [2022-07-13 22:25:27,903 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1254 places, 8054 transitions, 42321 flow [2022-07-13 22:25:27,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 1034 states. [2022-07-13 22:25:27,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2022-07-13 22:25:27,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 96477 transitions. [2022-07-13 22:25:27,990 INFO L488 CegarLoopForPetriNet]: DFA transition density 0.46886754857459445 [2022-07-13 22:25:27,990 INFO L72 ComplementDD]: Start complementDD. Operand 1034 states and 96477 transitions. [2022-07-13 22:25:27,990 INFO L73 IsDeterministic]: Start isDeterministic. Operand 1034 states and 96477 transitions. [2022-07-13 22:25:28,018 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-07-13 22:25:28,018 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 1034 states and 96477 transitions. [2022-07-13 22:25:28,148 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 1035 states, 1034 states have (on average 93.3046421663443) internal successors, (96477), 1034 states have internal predecessors, (96477), 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) [2022-07-13 22:25:28,537 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 1035 states, 1035 states have (on average 199.0) internal successors, (205965), 1035 states have internal predecessors, (205965), 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) [2022-07-13 22:25:28,632 INFO L81 ComplementDD]: Finished complementDD. Result has 1035 states, 1035 states have (on average 199.0) internal successors, (205965), 1035 states have internal predecessors, (205965), 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) [2022-07-13 22:25:28,632 INFO L186 Difference]: Start difference. First operand has 222 places, 229 transitions, 916 flow. Second operand 1034 states and 96477 transitions. [2022-07-13 22:25:28,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1254 places, 8054 transitions, 42321 flow [2022-07-13 22:25:29,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1251 places, 8054 transitions, 42099 flow, removed 2 selfloop flow, removed 3 redundant places. [2022-07-13 22:25:29,140 INFO L242 Difference]: Finished difference. Result has 1918 places, 2971 transitions, 21226 flow [2022-07-13 22:25:29,141 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=199, PETRI_DIFFERENCE_MINUEND_FLOW=899, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=1034, PETRI_FLOW=21226, PETRI_PLACES=1918, PETRI_TRANSITIONS=2971} [2022-07-13 22:25:29,142 INFO L279 CegarLoopForPetriNet]: 179 programPoint places, 1739 predicate places. [2022-07-13 22:25:29,142 INFO L495 AbstractCegarLoop]: Abstraction has has 1918 places, 2971 transitions, 21226 flow [2022-07-13 22:25:29,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 91.18181818181819) internal successors, (4012), 44 states have internal predecessors, (4012), 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) [2022-07-13 22:25:29,143 INFO L192 CegarLoopForPetriNet]: Found error trace [2022-07-13 22:25:29,143 INFO L200 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-07-13 22:25:29,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-07-13 22:25:29,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:29,361 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-07-13 22:25:29,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-07-13 22:25:29,361 INFO L85 PathProgramCache]: Analyzing trace with hash -1946743471, now seen corresponding path program 2 times [2022-07-13 22:25:29,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-07-13 22:25:29,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866421560] [2022-07-13 22:25:29,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-07-13 22:25:29,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-07-13 22:25:29,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-07-13 22:25:29,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-07-13 22:25:29,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-07-13 22:25:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866421560] [2022-07-13 22:25:29,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866421560] provided 0 perfect and 1 imperfect interpolant sequences [2022-07-13 22:25:29,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360910279] [2022-07-13 22:25:29,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-07-13 22:25:29,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-07-13 22:25:29,524 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-07-13 22:25:29,525 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-07-13 22:25:29,526 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-07-13 22:25:29,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-07-13 22:25:29,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-07-13 22:25:29,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 50 conjunts are in the unsatisfiable core [2022-07-13 22:25:29,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-07-13 22:25:29,833 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2022-07-13 22:25:29,996 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:25:30,035 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2022-07-13 22:25:30,751 INFO L356 Elim1Store]: treesize reduction 13, result has 18.8 percent of original size [2022-07-13 22:25:30,752 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 23 treesize of output 10 [2022-07-13 22:25:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:25:30,854 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-07-13 22:25:33,075 INFO L356 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-07-13 22:25:33,075 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 44 [2022-07-13 22:25:33,083 INFO L356 Elim1Store]: treesize reduction 9, result has 43.8 percent of original size [2022-07-13 22:25:33,084 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 94 treesize of output 85 [2022-07-13 22:25:33,094 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:25:33,095 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 78 treesize of output 54 [2022-07-13 22:25:33,102 INFO L356 Elim1Store]: treesize reduction 15, result has 6.3 percent of original size [2022-07-13 22:25:33,103 INFO L390 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 20 [2022-07-13 22:25:33,287 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2022-07-13 22:25:33,287 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360910279] provided 0 perfect and 2 imperfect interpolant sequences [2022-07-13 22:25:33,287 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-07-13 22:25:33,287 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29, 26] total 55 [2022-07-13 22:25:33,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828538026] [2022-07-13 22:25:33,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-07-13 22:25:33,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-07-13 22:25:33,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-07-13 22:25:33,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-07-13 22:25:33,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=2607, Unknown=67, NotChecked=0, Total=2970 [2022-07-13 22:25:33,291 INFO L443 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 199 [2022-07-13 22:25:33,292 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1918 places, 2971 transitions, 21226 flow. Second operand has 55 states, 55 states have (on average 77.2909090909091) internal successors, (4251), 55 states have internal predecessors, (4251), 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) [2022-07-13 22:25:33,293 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-07-13 22:25:33,293 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 199 [2022-07-13 22:25:33,293 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand